A.1 Job Spec Boiler Package Rev B

7/28/2019 A.1 Job Spec Boiler Package Rev B

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A.1_Job_spec_Boiler_Package_rev B.doc

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HINDUSTAN PETROLEUM CORPORATION LIMITED

MUMBAI REFINERY

DOCUMENT NO: 44-LK-5100-712/M.02/0013/A4

TITLE: JOB SPECIFICATION

FOR

UTILITY BOILER PACKAGE

Rev No. Issue Date Pages Rev Description Prepared By Checked By Approved By

A 12-Nov-08 30 Issued for HPCL

comments

KP PDB SNG

B 02-April-09 30 Revised as per HPCL

comments

KP PDB SNG


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HPCL, Mumbai Job Specification forDHT Project Utility boiler package

44LK-5100 Doc.No: 44-LK-5100-712/M.02/0013/A4 Page 2 of 30


TABLE OF CONTENTS

1.0 GENERAL 32.0 BASIC DESIGN 83.0 TECHNICAL REQUIREMENTS 124.0 BATTERY LIMITS 255.0 INSPECTION AND TESTING 276.0 FIELD TEST 287.0 GUARANTEES 288.0 PROTECTION AND PAINTING 299.0 PACKAGING AND IDENTIFICATION 3010.0 SPARE PARTS 30


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Job Specification for HPCL, Mumbai

Utility Boiler Package DHT Project

Page 3 of 30 Doc.No: 44-LK-5100-712-M.02-0013-A4 44LK-5100


1.0 GENERAL

1.1 This specification outlines the minimum requirements under which the manufacturer shalldesign, engineer, manufacture, assemble, erection, commission, test, prove mechanicaland performance guarantee, civil works on LSTK basis and supply of One No. of dual fuel(oil and gas) fired, water tube, natural circulation boiler package complete with allaccessories mentioned in the specification.

1.2 CODES AND STANDARDS

1.2.1 The latest edition of following codes and standards shall govern unless specifiedIndian Boiler regulations : IBRHeat exchanger Institute : HEIPressure vessels : ASME Sec VIII div 1Centrifugal Fan (FD Fan) : API 673Centrifugal pumps : API 610Positive displacement pumps

for general refinery services

: API 676

Metering pumps : API 675Code of practice for generalDay tanks construction in steel

: IS 803

Welded Steel Tanks for OilStorage

: API 650

Code of practice for designand Construction of steelChimneys

: IS 6533

Criteria of earthquake resistantdesign of structures

: IS 1893

Codes of Practice for use ofStructural Steel in generalBuilding Construction

: IS 800

Structural Steel : IS 2062Power piping code : ANSI B 31.1 / IBRAcceptance tests forcentrifugal, mixed flow andaxial pumps

: Hydraulic Institute Standard

Mechanical Vibration,Balancing QualityRequirement

: ISO 1940

Hand operated chain pulleyblock

: IS 3832

Anti-Friction BearingManufacturers Association

: AFBMA

As per emission regulations, ofCentral Board for the

Prevention & Control of air /water pollution Board India.

: Air pollution control

Noise control : OSHA StandardsNational fire protectionassociation

: NFPA codes

Three phase induction motors : IS: 325Performance testing of SteamGeneration units

: BS 845 Part I &ASME PTC 4.1-1964 By Indirect Heat loss method(R-1991)

Performance test code forDeaerators

: ASME PTC 12.3


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AMCA 210 : Test code for air moving devicesBS 848 Part I : Methods of Testing performance of centrifugal fansASTM D 888 Method A

(Colormetric Indigo Carmine)

: Method for testing Oxygen content in liquid

APHA method : Method for testing Carbon Dioxide contents in liquidMaterial specification : ASME Sec. IIPipe flanges & fittings : ANSI B 16.5, ANSI B 16.11, ANSI B 36.10ASME section VIII division 1 : Welding and brazing qualificationsASME section IX : Welding and brazing qualificationsNFPA-496: 1998 : Standard for purged and pressurized enclosures for

electrical equipmentASHRAE 37 : Methods of Testing for Rating Unitary Air-

Conditioning and heat Pump EquipmentASHRAE 52.1 : Gravimetric and Dust Spot Procedures for Testing

Air-Cleaning Devices used in General Ventilation forRemoving Particulate matter

ARI 430 : Central Station Air Handling Units

AMCA 208 : Field Performance Testing of FansAMCA 204-96 : Balance Quality & Vibration levels for FansAMCA 2404-99 : Drive Arrangements for Centrifugal FansAMCA 2410-99 : Drive Arrangements for tubular Centrifugal FansIS:655 : Metal air ductsSMACNA : HVAC Duct Construction StandardsSMACNA : HVAC Systems Testing, Adjusting and BalancingIS : 10773 : Copper tubes for refrigeration purposesIS 277:1992 : Specifications for galvanized steel sheets (Plain &

Corrugated)IS : 660 : Safety codes for mechanical refrigerationIS : 659 : Safety code for air conditioningIS : 5111 : Code of practice and measurement for testing

refrigeration compressors.

ARI 210 : Standard for Unitary Air Conditioning equipmentARI 270 : Standard for application, installation and servicing forUnitary equipment

ARI 310 : Packaged Terminal Air ConditionersARI 365 : Commercial and Industrial Unitary Air Conditioning

Condensing UnitsARI-410 : Standard for forced circulation air cooling and air

heating coilsARI 430 : Central Station Air Handling UnitsARI : 520 : Standard for positive displacement refrigeration

compressors and condensing units.ARI : 560 : Performance testing of machineIS : 4894 : Centrifugal fansOISD-118 : Layout for oil and gas installations

1.2.2 Jacobs standards specification and data sheets

Jacobs specification and data sheets as attached in RFQ and listed else where shall bereferred and followed.


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1.3 SCOPE OF SUPPLY

1.3.1 Scope of work covers design, engineering, manufacture, assemble, inspection, testing,

painting, packing, forwarding, supply, delivery at site, transferring material to erection site,erection, testing, commissioning, proving mechanical and performance guarantees, civilworks on LSTK basis of One No of dual fuel (Oil and gas) fired, water tube, naturalcirculation boiler package and with its all auxiliaries complying to specification, data sheetsand other documents attached with the RFQ: and consisting of following as a minimum.

1.3.2 Steam drums with internals, water walls, super heaters and economiser with tubes andnecessary inlet /outlet/intermediate headers, refractory settings, necessary insulation andcladding, support structures, furnace / convective section / super heater section accessdoors. Three-element level control arrangement, flow meter cum totaliser and safety valveon main steam header. Main steam stop valve (MSSV) including bypass valve near superheater outlet header, non-return valve in the main steam line etc.

1.3.3 Furnace complete with water walls, headers, screens, down comer, risers and furnace

bottom including seal plate.

1.3.4 All boiler and furnace setting brickwork, all refractory and heat insulation materials,material required for installing refractory and aluminium sheet material for insulation finish.

1.3.5 Fuel oil pumps (1W+1S), with necessary indicator/alarm for high/low level andtemperature in day tank, piping, OWS in this area.

1.3.6 Basket type pre-filters (1W +1S) at upstream of fuel oil pumps, fuel oil pre-heater (dualtype: Electrical and steam), basket type after filters (1W +1S) downstream of fuel oil preheater, fuel oil pumping unit, fuel oil circulating heater, fuel oil return piping.

1.3.7 Dual fired burners (Operation with fuel oil /fuel gas with any combination of fuel gas shouldbe possible), burner block, steam injection system, fuel gas pressure regulation system,

fuel gas based pilot burner; LPG cylinder and Pilot flame assembly, cooling arrangementfor scanner etc.

1.3.8 Low NOx (oil /gas) fired burners with necessary modulating controls suitable for turndownratio, igniters, ignition transformer, flame scanners, air register and scanner coolingsystem.

1.3.9 Fuel gas knockout drum and automatic block and bleed arrangement on fuel gas line tofuel KOD.

1.3.10 Mass flow meters on fuel oil supply and return line, flow meter cum totaliser for fuel oil andfuel gas, back pressure control valve to be provided between fuel oil supply and return line.

1.3.11 Two Nos. (1W +1S) VFD operated Boiler feed water pumps (API) with drive motorcomplete with base frame, coupling, connecting flange, suction strainer, non-return valves,minimum flow recirculation valves, insulation and cladding.

1.3.12 Two Nos. (1W +1S) Export BFW pumps (API) with min flow recirculation valve.

1.3.13 Two Nos. (1W +1S) radial backward curved forced draught fan (FD) & Two Nos. (1W+1S) of Induced draught fan (ID) with VFD operated drive motor, suction silencer & inletwire mesh filter (Changeable type), coupling, base frame, lubrication system, air flowmeasurement, insulation and lagging on FD fan, vibration probes, proximitors, RTDs formotor bearings, RTDs for motor windings, RTDs for fan bearing, manual isolation damperat FD fan outlet. Flow indicators for the air from the fans.


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1.3.14 FD fan suction ducting, air ducting from FD fan to burner/ furnace

1.3.15 Flue gas ducting from boiler to ID fan and from ID fan exhaust up to chimney/stack Inlet,expansion joints on ducts.

1.3.16 Automatic and emergency operated soot blowers and control equipment for furnace,super-heater, boiler bank and economiser including all integral piping, control valves, pipehangers and supports and enclosed floor mounting type soot blower control panel.

1.3.17 Boiler mountings and fittings as per the relevant IBR act.

1.3.18 Pressure reducing station and de-super heater for steam usage within the battery limit.

1.3.19 All piping within battery limit including valves and fittings, strainers with necessary supportswithin the battery limit for steam, feed water, instrument air, drains, vents and blow-down,fuel, air and all other utilities. Temporary piping for start up and commissioning.

1.3.20 All necessary instrumentation (inclusive of CO2, O2, SOx, NOx Analysers and flow metercum totaliser for fuel) and controls with audio/ visual annunciation of alarms and runninglights for all the drives on a control panel. All field and panel control wiring includinghardware. Common fault annunciation signal on the common DCS.

1.3.21 PLC based control panel, VSD panels etc.

1.3.22 MCC for all electrical drive motors, UPS, local P. B station and field cablings with trays andsupports along with earthing for all equipment within battery limit (refer electrical scope andSLD).

1.3.23 Steam generating unit and auxiliary equipment supporting steel structure includingsuperstructure and miscellaneous structural steel platforms, walkways, stairs, handrails,

ladders, elevated corrugated metal galvalume roof supported by boiler steel structure tocover adequately the boiler, platforms, main steam stop valve reducing stations and otherplatforms and stairs. Necessary rainwater down-comer from these roofs up to the groundfloor level, access door to furnace/convective section/super heater section. Boiler shall bekept under covered structural steel shed. Shed to be provided by vendor with monorails atrequired locations.

1.3.24 Piping supports, pipe rack, cable rack for electrical and instrumentation cabling and trays,pipe supports and hangers, platform/access & platform within battery limit.

1.3.25 Adequate number of access and observation doors for boiler furnace, economiser alongwith soot blowers, fans and ducts.

1.3.26 Blow down flash drum/tank (to generate low pressure steam to be used for deaerator) and

RCC pit. Blow down from blow down flash vessel up to B/L., insulation and lagging oftanks, blow down valve for CBD and IBD.

1.3.27 HP and LP Chemical dosing system as required complete with mixing cum metering tank,agitators, and metering pumps with piping, valves and accessories.

1.3.28 Duplex steel sample coolers suitable for sea water for boiler blow down, steam and feedwater.


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1.3.29 Deaerator with level control valve, pressure control valve, HV on steam line, online oxygenanalyzer at outlet of deaerator, structure platform etc.

1.3.30 DENOx facility along with sump for oily waste as described in clause No. 3.8.5

1.3.31 All cold and hot air ducts and necessary expansion joints, dampers, isolators support.

1.3.32 All flue gas ducts up to chimney with necessary expansion joints, dampers and supports.

1.3.33 A self-supporting carbon steel refractory lined chimney with platforms lightening arrestorstrip, aviation lamps.

1.3.34 All insulation and cladding for hot air and hot flue gas ducts, hot water and steam pipingsystem within battery limit and other exposed hot surfaces as per attached specification.

1.3.35 Flue gas analysis apparatus (gas to be analysed for CO, O2, NOx, SOx). Shelter for samewith air conditioning.

1.3.36 Provision for sampling points for flue gases.

1.3.37 Flushing oil connectivity as per the requirement for congealing services.

1.3.38 All necessary safety guards for moving parts, base plates, base frames for pump, blowers,etc. sleeves, anchor bolts, foundation bolts for equipment, structure, shim plates foralignment, nuts and washers.

1.3.39 First fill of lubricants for all equipment within battery limit

1.3.40 Chemical cleaning of system and Steam blowing.

1.3.41 Necessary lifting tools and tackles like monorail, chain pulley block etc, supporting and

runway beams for facilitating maintenance work of FD fans, ID Fans, BFW pumps, drivemotors, etc.

1.3.42 Painting as per specification.

1.3.43 Mandatory spare parts as per list specified.

1.3.44 Spares for commissioning / start-up of utility boiler package and preparation for shipment,packaging etc.

1.3.45 Special tools and tackles crane accessories for erection and commissioning. Erectioncommissioning of complete package. Pre commissioning, hydro testing etc.

1.3.46 Construction of all structural, stairs, platforms, sheds etc. Metallic side sheeting for shade.

1.3.47 Carrying out performance guarantee test at site.

1.3.48 IBR approval for boiler pressure parts and accessories coming under IBR preview. CCOEapproval for tanks.

1.3.49 All documentation as specified in the vendor document requirement.

1.3.50 Inspection and testing as specified.


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1.3.51 All statutory approvals from local bodies like IBR, smoke nuisance authority, DGCAapproval from civil aviation authority etc. including the liaison and coordination work in thisrespect. Any change/addition required to be made to meet the requirements and full

satisfaction of the statutory authorities shall be carried by vendor free of charge. Vendorshall also provide all assistance for getting PCB approval wherever required.

1.3.52 Development of equipment layout for utility boiler package within the space allocatedindicated in the conceptual layout attached with the RFQ.

1.3.53 For detail electrical scope of work refer the attached document ANNEXURE-1 (Scope ofwork electrical for utility boiler package) and single line diagram and requirements forHVAC.

1.3.54 For detail instrumentation scope of work refer the attached document Standardspecification for instrumentation work (Doc No. 44-LK-5100-00/J.02/0017-A4) and variousrequirements specified in this specification.

1.3.55 Air conditioning system for VFD room / control room ; Supply of air conditioning units,supply and return ducts, duct supports, fire dampers, volume control dampers, supply andreturn grills, acoustic insulation for ducts, compete insulation for supply and return duct,MCC, cabling work, Instrumentation panels, instrumentation cabling.

1.3.56 All civil design, detail engineering, construction of RCC foundations, pedestals, trenches,layout, paving requirement and grade slab drawing, supporting structures, good forconstruction drawings including all documentation, rebar schedules, MTO, constructiondrawings. Design, engineering, layout, construction of substation building includingcomplete air conditioning package (system) for VFD / control room & fire proofing etc.

1.3.57 Packing and forwarding.

1.3.58 Mechanical guarantee and performance guarantee.

1.3.59 Site performance test and instruments required for same.

1.4 EXCLUSIONS

The following shall be excluded from vendors scope of supply:

1.4.1 Supply of utilities at one point at the battery limit.

1.4.2 Pipe rack up to boiler shed as indicated in conceptual equipment layout for boiler area(Drawing No. 44LK-5100-712-L.01-0204-A1).

1.4.3 Fuel oil day tank

2.0 BASIC DESIGN2.1 The design of utility boiler package shall meet the requirements specified in :1. Data sheets.2. P&IDs.3. Job specification4. Applicable codes, standards5. Standard specifications

In case of conflict between the above documents, most stringent shall be followed.However all conflicts shall be referred to the PMC/Owner for clarification and decision ofPMC/Owner shall be final and binding on the bidder without any cost or delivery implication


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2.2 Process data sheet is also attached along with specification. The attached PDS forms adesign basis for the utility boiler package.

2.3 Boiler area classification: Class 1, Division 2, Gas group C/D. Refer attached boiler areaclassification drawing.

2.4 The Boiler and auxiliary equipment shall be sized for the following simultaneous conditionsas a minimum:- Boiler net capacity of 100 TPH (without internal consumption) and steam pressure of 40Kg/cm2 (g) and temperature of 360

OC at B/L.

- Boiler internal steam requirements such as for deaerator, fuel oil atomization, tracing fuelheating, soot blowers etc.- Export BFW requirement of 50 TPH at specified temperature from deaerator.- Min. ambient temperature for combustion air- No condensate return- Lowest net calorific value among all fuels or combination of fuel gases

- Temperature of flue gas min. 15 degrees above sulphur acid dew point in stack

2.5 Boiler turn down shall be 25% of MCR.

2.6 Boiler shall be capable of operating with an output of 110% of the MCR rating for aminimum thirty minutes in each of eight hrs shift. Specification of quality of steam shall beas follows:pH = > 8.3Conductivity at 25 C =


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2 Supply pressure (Normal) 5 Kg/cm2 G3 Supply temperature 80 Deg C4 Flow rate (Kg/hr) Max 80% of boiler capacity

2.13 DM water specifications:

Sr. No. Parameter

1 pH value 6.5 to 7.02 Turbidity < 1 NTU3 Total hardness as CaCO3 Nil4 Total silica (reactive) as CaCO3 < 0.02 mg/l5 Total iron as Fe 0.01 mg/l6 Conductivity@ 25 Deg C < 0.2 micromh/cm7 Supply pressure (Min / Normal /

max)6.0 /7.0 /8.0 Kg/cm2 G

8 Design pressure 11.5 Kg/cm2 G9 Supply temperature AMB

10 Design temperature 65 Deg C

2.14 Polished condensate specifications:

The suspect condensate source shall be from condensate polishing unit. Thespecifications are as follows:

Sr. No. Parameter1 Suspect condensate source From condensate polishing unit2 Supply pressure (Normal) 5 Kg/cm2 G

Supply temperature 40 Deg C (normal), 60 Deg C (Max)3 Flow rate (Kg/hr) Max 80% of boiler capacity4 TDS < 0.5 mg/l5 Total silica < 0.01 mg/l SiO26 Total iron < 0.01 mg/l Fe7 Copper < 0.003 mg/l Cu8 Organic substance Nil as KMnO4 mg/l9 Conductivity@ 20 Deg C < 0.2 microS/cm10 Oil content (Hydrocarbon) Nil mg/l11 Total hardness as CaCO3 Nil ppm wt as CaCO312 Oxygen


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2.17.2 For economic comparison of equipment vendors offer, Equipment Cost + Cost ofInsurance Spares (if specified) + Loading (as defined above) are considered.

2.17.3 The values for estimating cost of energy consumption shall be considered as indicated incommercial documents in the enquiry RFQ.

2.17.4 The maximum loading to be applied however shall not exceed 10% of the total packagecost.

2.17.5 The loading for power consumption shall be based on the following simultaneousconditions:- Net Boiler capacity of 100 TPH at specified pressure and temperature conditions atbattery limit- Export BFW requirement of 50 TPH- Internal consumption for Boiler auxiliaries- No condensate return- Boiler fuel as typical refinery fuel gas

- Normal ambient temperatureVendor shall indicate the individual power consumption for equipment considered forloading (as specified above) for these conditions in the offer clearly.

3.0 TECHNICAL REQUIREMENTS

3.1 FEED WATER SYSTEM

3.1.1 Feed water system shall consist of Deaerator, BFW pumps, interconnecting piping fromDeaerator to BFW pumps suction and from BFW pumps up to the boiler. BFW Exportpumps, piping from deaerator to BFW Export pumps and piping from BFW export pumpsdischarge up to boiler package battery limit in the scope of supply.

3.1.2 Boiler net capacity shall be 100 TPH of VHP steam and steam pressure of 40 Kg/cm2 (g)

at B/L. Boiler net capacity does not include boiler internal steam requirements such as fordeaerator, fuel atomization, soot blower requirement etc.

3.1.3 Parallel down flow, spray cum tray type deaerator shall be sized for export of 50 TPHBFW, in addition to the requirement for the boiler unit.

3.1.4 Thermal design shall comply with heat exchanger institute standard on `Deaerator HeaterStandards or equivalent. Vessel shall be designed for the full vacuum.

3.1.5 Deaerators drum size to be based on minimum 30 minutes storage between LAH & LAL.Storage requirement shall be based on capacity of boiler + Export BFW requirement.Normal working level shall be at 0.6 D (diameter of storage tank). Deaerator shall becapable of meeting the turndown requirements of boiler.

3.1.6 Deaerators shall be provided with support steel structures, platforms, stairways andlocated at an elevation to satisfy NPSH requirement of BFW pumps. The elevation ofsupporting platform shall be accordingly indicated in the bid. The material of the deaeratorshall be SA 516. Internals shall be SS. Deaerator shall be spay and tray type.

3.1.7 Deaerator and DM water supply system shall be designed for no condensate return case.Deaerator shall be designed for LP steam design conditions.

3.1.8 Deaerator shall be provided with level control, pressure control, HV on steam line, onlineoxygen analyzer at the outlet of deaerator. Control valve on steam, condensate and makeup water line shall be sized for with and without condensate return conditions.


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3.1.9 Steam venting through the deaerator shall not exceed 1% of total steam consumption indeaerator.

3.1.10 Sample cooler shall be provided for sampling deaerator water. Sample cooler shall beprovided at grade level.

3.1.11 Instruments shall suitable for the specified area classification.

3.1.12 Deaerator shall be separately supported from ground on steel structure. Platform allaround with access staircase shall be provided. Minimum height shall be 10 meter.Platform at Deaerator top also shall be provided with access for maintenance ofinstruments and valves.

3.1.13 Deaerator has to be in operation (to supply BFW to process) even when the boilers is notservice.

3.2 BOILER FEED WATER PUMPS AND BFW EXPORT PUMPS

3.2.1 Vendor shall provide 2 Nos. (1W + 1S) of BFW pumps for the boiler unit. The pumps shallbe supplied along with drive motors along with VFD, coupling, coupling guard, seals,integral piping, all instruments and controls, etc.

3.2.2 The offered pumps shall be as per designed as per API 610 latest edition.

3.2.3 Each pump shall be provided with minimum flow auto-recirculation valve mounted onpump discharge flange.

3.2.4 BFW pumps shall be capable of pumping when safety valves on the steam drum blow off.

3.2.5 BFW pumps shall be provided with reacceleration facility. Also, provision shall be provided

to start/stop BFW pumps from DCS. BFW pumps shall have auto-start and autochangeover facility with motor sized for the end of curve operation.

3.2.6 Vendor shall provide 2 Nos. (1W + 1S) of BFW Export pumps as per API 610, latestedition. The pump shall be supplied along with drive (along with VFD if required), coupling,coupling guard, seals, integral piping, all instruments and controls, etc.

3.2.7 BFW Export pumps shall have min recirculation control valve in its scheme. BFW Exportpumps shall have auto-start and auto changeover facility with motor sized for the end ofcurve operation.

3.2.8 Pump metallurgy shall be selected for starting pump in hot conditions or else warm up lineshall be provided.

3.2.9 Electrical and instrumentation shall be suitable for specified area classification.

3.2.10 Monorail for maintenance shall be provided for all pumps.

3.2.11 Boiler feed water pumps & Export BFW pumps MOC shall be CI.

3.3 COMBUSTION SYSTEM

3.3.1 Boiler turn down shall be 25% of MCR & boiler shall be capable of operating with an outputof 110% of the MCR rating for a minimum thirty minutes in each of eight hrs shift.


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3.3.2 The vendor shall provide Two Nos. (1W +1S) of Forced draft fans (FD) and Two Nos. (1W+1S) Induced draft (ID) fans with inlet silencer and inlet wire mesh filter (changeable type)for boiler capable to supply varying amount of air to match the boiler turndown ratio.

3.3.3 Vendor to ensure the safe and stable operation at 30% of rated capacity.

3.3.4 Each forced and induced draft fan shall be designed considering 25% margin on pressureand 35% margin on calculated capacity at rated MCR.

3.3.5 The combustion air blower shall be provided with drive arrangement, inlet silencer cumfilter, ducting between blower and combustion chamber etc.

3.3.6 FD and ID fans shall be provided with VFD for regulating air to fuel ratio under turn downoperation.

3.3.7 FD fan outlet damper shall be shut off type. Dampers shall be motorised or pneumaticallyoperated. The actuators and necessary linkages shall be furnished by the vendor. ID fans

shall be provided with Inlet guide vanes

3.3.8 For flow measurement, flow transmitters shall be provided for the air from the FD and IDfans. Straight duct length for installation of flow transmitter shall be as per goodengineering practice.

3.3.9 The radiation loss for the furnace shall be considered as max. 1-2 %.

3.3.10 Areas classification for electrical and instrumentation shall be as specified

3.3.11 Monorails for all fans motor shall be provided for maintenance.

3.4 Firing Equipment:

3.4.1 Burners shall be dual fired, low NOx type. Operation with fuel oil / fuel gas with anycombination of fuel gas shall be possible. The fuel oil specifications and fuel gasspecifications are as specified in BEDB Part-II.

3.4.2 Burner shall be pressure atomized. Burner shall be suitable for operating continuously onturndown load based on the turndown requirement. Below the maximum turndown theoperation shall be ON / OFF type. Burner shall be provided with sight glass for flameinspection. UV scanner per burner shall be provided for detection of flame.

3.4.3 Pilot burners shall be gas based. LPG cylinders assembly shall be provided for the start upwhen fuel gas is not available from refinery.

3.4.4 Suitable burner cleaning, holding rack for boiler shall be furnished along with necessaryspanners and tools. Facility for cleaning gas spuds shall be provided.

3.4.5 The scanner for burner assembly shall have one number ionization rod for each pilot flameand one number UV detector for each main flame.

3.4.6 Burner shall be designed for all five cases of fuel gas & fuel oils (HSFO & LSFO).

3.5 FUEL OIL SYSTEM / FUEL GAS SYSTEM

3.5.1 The fuel oil system shall comprise of fuel oil piping from fuel oil day tank (by others) up toburners, two Nos. (1W +1S) of fuel oil pumps, necessary instrumentation and controls,fuel oil pre-heater, fuel oil filters. Vendors scope starts from the nozzles of the fuel oil day


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tank (by others).

3.5.2 Fuel Oil Day Tank:

3.5.3 Existing fuel oil tank shall be used as a day tank for the proposed boiler. Fuel oil will bemade available at the nozzles of the existing fuel oil day tank. Boiler vendor has to carryout necessary co-ordination and interface engineering for the same. Vendor to referprocess datasheet (PDS) and P&ID of utility boiler.

3.5.4 A suitable pumping and heating unit shall be provided for preheating (dual type: Electricaland Steam) fuel oil as required for pumping, atomizing and firing. The unit may be skidmounted consisting of filters, pumps and heaters of specified type. The pumps shall be ofpositive displacement screw type with relief valve. The pump shall be offered incompliance to the guidelines of API 676. Fuel oil pumps shall be provided with auto-startfacility. Pump motor shall be designed for end of curve operation. The heater shall be dualtype (electric and steam heated). Heat exchanger shall be designed as per TEMAstandards.

3.5.5 Fuel oil lines shall be provided with continuously operating re-circulation lines withpressure build up orifice. A suitable pulsation dampener may also be provided to even outany variations in flow rate during pumping

3.5.6 Fuel oil supply and return lines shall be provided with mass flow meters. A back pressurecontrol valve shall be provided between fuel oil supply and return line. Basket type pre-filters (1W+1S) upstream of fuel oil pumps (designed to remove particles of size up to 10mesh) & basket type after filters (1W+1S) down stream of fuel oil heaters designed toremove particles of size up to 30 mesh shall be provided by vendor. Fuel oil circulatingheater shall be provided.

3.5.7 Vendor shall provide the fuel gas knock out drum and automatic block and bleedarrangement on the fuel gas line to fuel KOD inlet and drain lines.

3.5.8 Flow meter cum totaliser shall be provided for fuel oil and fuel gas.

3.5.9 Fuel oil line from fuel day tank & fuel gas KOD outlet line to be traced.

3.5.10 All instrumentation and electrical on gas and fuel circuit shall be Ex (d) TYPE.

3.5.11 Boiler vendor to prepare and submit the detailed P &ID for the fuel oil and fuel gas circuitfor owner/PMCs review and approval.

3.6 DRUM INTERNALS

3.6.1 Drum internals shall be adequately designed to ensure generation of superheated steamat outlet. The steam drum shall be sized to have minimum 3 minutes hold up at full outputbetween normal water level and low water level in the drum.

3.6.2 Drum MOC shall be minimum SA 387 Grade 11 class 1 & 2.

3.7 HEAT TRANSFER SECTIONS

3.7.1 The super heater where included in the scope, shall preferably be with a flat characteristicover the operating range without an attemperator.

3.7.2 The economiser along with soot blower inlet and outlet ducting shall be so arranged that itis possible to install soot cleaning. The economiser shall also be arranged for off-load


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water washing. To enable this, means shall be provided for bypassing the economiser onthe gas side. The bypass dampers shall be operated from the operating floor level.

3.8 DUCTS, DAMPERS AND THERMAL DENOx FACILITY

3.8.1 All air ducts and wind box shall be fabricated from sheet steel not less than 5 mm thickand all gas ducts from min. 6 mm thick plate.

3.8.2 Suitable heat conservation insulation shall be provided for the ducts.

3.8.3 All dampers shall be as far as possible be operated from operating floor level. Inlet, outletand by-pass dampers shall be provided for the economiser. Bypass dampers shall havespring-loaded strips or similar to ensure gas tightness.

3.8.4 Vendor shall provide ducting for flue gas from boiler to stack with all supports andinsulation.

3.8.5 DENOx FACILITY

3.8.5.1 Boiler package vendor shall provide Selective non-catalytic reduction (SNCR) processbased thermal DENOx facility. The DENOx facility shall consist of sleeves, ammoniainjection nozzles, CO analyzer, Ammonia Analyzer, NOx analyser etc.

3.8.5.2 Two Nos. of temperature connections shall be provided, one for measurement of flue gastemperature at up steam of super heater and other one temperature connection betweenprimary and secondary super heater.

3.8.5.3 NOx analyzer shall be provided in the stack for measurement of NOx emissions in fluegas.

3.8.5.4 Adequate maintenance platforms shall be provided at the location of the temperature

connections & at the injection nozzle locations. Proper access shall be ensured for themaintenance of the injection nozzles.

3.8.5.5 Vendor has to take a tapping for LP steam for thermal DENOx facility. Vendor has tomake a provision for LP steam line. LP steam shall be required as ammonia carrier.

3.8.5.6 Connection with blind flange for CO analyzer to be provided at upstream of the primarysuper heater.

3.8.5.7 Vendor shall provide the suitable interlinking of boiler P & ID with DENOx system P & ID(i.e. interconnection of fuel/steam flow measuring instruments, analyzers, interlocks etc)

3.8.5.8 Vendor shall take necessary approvals/ clearances required if any, from statutory bodieslike IBR for the work in boiler.

3.8.5.9 Adequate space shall be provided on the pipe rack to accommodate approx. 6-8 NB LPsteam line, approx. 1 NB ammonia line and if required, approx. 1 NB hydrogenline.

3.9 CHIMNEY/ STACK

3.9.1 Chimney shall be self-supporting type, carbon steel refractory lined up to top.

3.9.2 The height of chimney shall comply with the statutory requirements of local authorities andsmoke nuisance regulations. However the stack height shall be min. 60m from grade level


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or calculated based on SOx emission at 110% MCR of the Boiler, maximum height out ofthis shall be considered.

3.9.3 Design, engineering, fabrication, erection of the stack with all insulation, painting, gasanalyser stations, platforms, ladders, lightening arrestor, aviation lamp, junction boxes foraviation lighting, painters trolley etc. shall be provided.

3.9.4 Lightning protection as per IS 2309 shall be provided. Two earthing terminals shall beprovided at the base of the chimney.

3.9.5 For details, refer the Standard specification for steel stacks (Doc No. 44LK-5100-00-V.02-0211-A4) attached herewith this enquiry documents.

3.9.6 Platforms shall be generally having not more than 9 m vertical span. The platforms shallbe provided 360 degree all around the stack. Two nos. ladders shall be provided 180degree apart to the platform up to arch / furnace top level.

3.10 CHEMICAL DOSING SYSTEM

3.10.1 If required, both high pressure and low-pressure chemical dosing systems shall beconsidered. Chemical dosing systems shall be complete with necessary feed tanks,mechanical agitators, dosing pumps with drives interconnecting piping and all necessaryinstrumentation. Chemicals supply shall be owners scope.

3.10.2 The feed tanks shall be constructed of mild steel plate with inside rubber lining of 5 mmthickness. Each tank shall be provided with calibrated translucent measure pot attached tothe tank and shall provide 1-day storage requirement.

3.10.3 The dosing pumps (one working & one standby) for each system shall be positivedisplacement, double diaphragm type, variable stroke with electric motor drive throughsuitable gear box, stroke control can be adjusted manually as well.

3.10.4 Material of construction for all wetted parts shall be SS 304 or rubber lined based onapplication.

3.10.5 All electrical and instrumentation shall be as per area classification specified.

3.10.6 Dosing tank shall be suitably provided with platform, stairs for loading chemical andmaintenance of agitator. Monorail shall be provided for lifting chemical drums up toplatform.

3.11 BLOW DOWN VESSEL AND DRAINS

3.11.1 A blow down flash drum to generate low pressure steam which is to be used for Deaerator& a RCC pit for final disposal of blown down to be provided. Facilities for both intermittentand continuous blow-down shall be included.

3.11.2 The blow down vessel shall be adequately sized to take care of maximum blow downquantity.

3.11.3 The blow-down drum shall be designed and constructed of boiler quality steel plates asper IBR and shall include adequate vent fitted with an exhaust hood.

3.11.4 A blow down flash drum to generate low-pressure steam, which is to be used for deaerator& a RCC pit for final disposal of blow down.


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3.11.5 Necessary level gauges, safety valves, etc. shall be provided.

3.12 SOOT BLOWERS

3.12.1 Adequate number of motor driven soot blowers shall be provided for proper cleaning of allheating surfaces of boilers, super-heaters, economiser complete with all piping andaccessories including valves, controls, control panel and necessary cabling. Pressurereducing station for soot blowers shall be independent of that for atomising steam so asnot to affect combustion during soot blowing operation.

3.12.2 In zones where gas temperatures are expected to exceed 800oC, retractable type of soot

blowers shall be provided.

3.12.3 Automatic sequential soot blowing shall be provided through a PLC and MCC along with alocal start-stop push button for each soot blower.

3.13 PLATFORMS, WALKWAYS, STAIRS AND LADDERS

3.13.1 Platforms, Galleries and access ladders shall be provided for burner operation, sootblowers, access doors, peep holes, valves requiring manual operation, maintenance,accessibility, etc. so as to facilitate easy operation and maintenance. Platforms to beprovided for tank, deareator etc as specified else where.

3.13.2 Size of platforms shall be in such a way that the equipment to be attended shall beapproachable from all sides. Minimum width of platforms and walkways shall be 1000mm. Minimum headroom above the top of platform or walkway should be 2200 mm.Members supporting floor panel shall not deflect by more than 1/325 of the span.

3.13.3 All stairs shall have a minimum clear width of 750 mm and the slope shall not exceed 45Deg. with the horizontal. Minimum width of tread of stairs shall be 225 mm and the riseshall not exceed 200 mm. Length of landing should not be less than 900 mm or the clear

width of stair, whichever is greater. Maximum number of risers in a flight shall berestricted to 16.

3.13.4 Fixed ladders shall be provided to platforms / roofs, which do not require frequent accessby the operating personnel. Ladders should preferably of a sloping type with a maximuminclination of 15 Deg. to the vertical. Clear width between strings shall be 450 mm.Minimum thickness of strings shall be 10 mm.

3.13.5 Design loads for platforms, stairways, etc. shall be as follows:Access platforms, walkways and staircases, etc. a load of 400 kg/sq.mt.Operating floors and platforms where maintenance work will be carried out; moving load of200 kg/sq. mt. Plus one point load of 500 kg in an area of 1 mt. Sq.Platform attached to vessels, moving load of 125 kg/sq. mt.

3.13.6 Steel staircases shall be 1 m wide and not more than 45 degrees inclination. Staircaselandings shall be minimum 900 mm long. Hand railing shall be at 1 m height from thestaircase and made of galvanized pipe. Good quality skid proof frills shall be used forsteps and toe plates shall be provided on hand railings.

3.13.7 Use of cat ladders shall be avoided. Where inevitable, it shall be 450 mm wide and shallhave safety cages if the height exceeds 3 meters.

3.13.8 Two exits shall be provided for each platform from safety point of view. The boiler unitplatform shall be interconnected at lower burner level, drum level and at intermediate level.


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3.13.9 Platforms, walkways, staircases and landings shall be provided for safe operation andmaintenance of the boiler and auxiliary equipment and in general conform to anacceptable and proven standard. Arrangement of platforms, walkways and landings shall

provide safe access to all openings for inspection and cleaning purposes, permanent andtest measuring points, control devices, local instruments, vents and drain valves, sootblowers, safety valves etc. Wherever possible platforms, walkways and staircases shall besupported from unheated structures of boiler or building and shall never be supported frompressure parts or other moving parts of the boiler or other plant. Platforms & walkwaypanels and stair treads shall be made of structural steel open bar gratings. Cantileverbeams are acceptable if the span of the cantilever does not exceed One and Half (1.5)metres. However, even with the above restriction on the span, depending on the loading,requirement of knee bracing or moment bracket should be ascertained & provided.

3.13.10 The boiler supporting structure shall be a braced structure with both vertical and horizontalbracing for the transfer of loads effectively. The vertical bracing shall be arranged form topto bottom and shall be continuous to transfer the horizontal loads to the base of thecolumns. Horizontal bracing shall be arranged at discrete levels to transfer the horizontal

loads due to wind, seismic and thermal loads from the boiler, transmitted through theguides, to the columns.

3.13.11 Gratings shall be of structural steel with a minimum depth of 30 mm and a minimum widthof 300 mm and shall conform to BS:4592 Part I.

3.13.12 Top rail, knee rail and vertical post shall be 32 NB (medium) tube conforming to IS:1239.Toe plate shall be 100 mm wide, Handrail shall be galvanised.

3.13.13 The complete boiler and the auxiliaries structural steel supports including the roof over theboiler and fuel storage tanks and side cladding from the top to the drum operating floor, allfoundation bolts and base plates for the structurals shall be the responsibility of thevendor. The roof of the boiler shall be provided with monitor roof and the side claddingshall be provided with adequate louvers for the proper ventilation of the covered space.

3.13.14 Metallic cover sheets shall be used for shade.

3.14 PIPING, VALVES AND FITTINGS

3.14.1 Steam main header shall be designed for 20% excess design up to B/L. Vendor to provideflow meter cum totaliser, pressure transmitter and safety valve on main steam header.

3.14.2 Vendor shall provide all interconnecting piping between boiler and boiler flash drum.

3.14.3 Vendor shall provide fuel gas KOD outlet line up to boiler battery limit (with tracing) & BFWexport line up to boiler battery limit.

3.14.4 Vendor shall consider the flushing oil connectivity in the scope of supply.

3.14.5 All valves shall be of approved design conforming to IBR and of approved make and thoseof similar make and type shall be interchangeable.

3.14.6 All valves for steam, feed and blow down services shall have cast or forged steel bodieswith covers and glands bolted on. All valves shall be fitted with outside screws unlessotherwise approved and where extension spindles are fitted, thrust when opening orclosing the valve, shall not be taken directly on the valve body.

3.14.7 All silencers provided for safety valve outlet/vent valves shall contain noise level to max. 85dB (A) at 1 M distance.


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3.14.8 The battery limit terminal flanges shall be as per ANSI B 16.5. The valves shall be torelevant BS/ API standards and approved by IBR for those coming under IBR preview.

3.14.9 Vendor shall develop and submit the complete equipment layout for boiler package areawithin space allocated. The same shall be submitted to PMC/Owner for review andapproval.

3.14.10 All valves which are not accessible shall be motorized. All motorized valves shall be byvendor. The following valves shall be motorised as a minimum:

a) Main steam stop valve

b) Main steam stop valve bypass (line bypass of size NB 50) with inching type.c) Start up Vent isolation valve with inching facilityd) Soot blower steam line main valve (upstream of control station) and drain valve,

if soot blower is required.e) Upstream isolation valves in the Boiler Feed water control stations and

motorised gate valve for the feed control station 100% inlet isolation, inlet

isolation bypass, 30 % inlet isolation.f) Both continuous and intermittent Blow down valves with inching type.g) All super heaters drain and vent valves. The first isolation valve will be a

motorized valve.

3.14.11 The motorized valves open / close time shall be suitable for the application. All valve shallbe with position indicator.

3.14.12 The boiler feed water piping downstream of the Boiler feed water pumps and up to thefeed check and stop valve shall be designed for the cold shut off pressure of the boilerfeed water pumps.

3.14.13 Stress analysis for lines having operating temp above 65 degree C and line size greaterthan 3 shall be carried out. Report shall be submitted for same.

3.14.14 Hanger type / spring type guide type support shall be provided based on stress analysisreport.

3.14.15 Lines at B/l shall be provided with anchor supports however same shall taken care as apart of detail engineering.

3.15 INSULATION

3.15.1 For insulation requirements, refer the Standard specification for hot insulation (Doc No.44LK-5100-00-V.02-0003-A4).

3.16 INSTRUMENTATION

3.16.1 The control system for boiler and auxiliaries shall be through electronic instrumentationsystem in the control room of the plant.

3.16.2 Burner start-up panels shall be mounted on the firing floor of the boiler. Burnermanagement system shall be through electronic instrumentation and control system andfloor- mounted.

3.16.3 Alarm and trips for the upset parameters and safety requirements of the equipment shallbe through electronic instrumentation system. Parallel information on DCS system(provided by Owner) shall be made available by vendor. The vendor shall furnish list of allcritical parameters to be connected to the plant DCS/PLC.


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3.16.4 Data logging and reporting facility for the following minimum parameters shall be madeavailable in the DCS system (or main control room)

Steam flow rateSteam pressureSteam temperatureCommon fault alarm

3.16.5 Burner Management System and combustion control shall be provided with lead-lagfeatures for air and fuel so that at any moment of time boiler does not have fuel richcondition. The combustion control shall operate the steam-generating unit within the limitof the equipment being controlled and within the specified turn down. The combustioncontrol shall maintain the boiler steam pressure within + 2%, temperature + 5

oC the

excess air in the furnace within + 5% and the draft in the furnace within +1.2 mm (0.05) ofwater of the predetermined draft value provided the rate of load change on the boiler is notmore than 20% of the boiler capacity in any one (1) minute.

3.16.6 Feed water control shall be through 3-element drum level control with two out of three logicand shall be located on operating platform. On very low drum level two out of three rotarylogic shall be used for tripping the boiler. All control valves shall be provided with isolationand bypass valve.

3.16.7 Steam temperature control shall be provided to maintain the super heater outlettemperature of steam at + 5

oC throughout the entire control range of turndown.

3.16.8 For instrumentation technical requirements, refer the attached documents forinstrumentation.

3.16.9 Al trips shall be provided with 2oo3 logic. No switches are acceptable. Only transmittersshall be provided.

3.16.10 Vendor to provide the following instruments as a minimum requirement. The following listis indicative only and vendor shall supply all the field sensors, transmitters, final controlelements that are required for smooth, safe and automatic operation of the boiler unit andthe other auxiliaries.

3.16.10.1 3 element drum level control with 100% redundancy, 2 out of 3 logic- Drum level differential pressure transmitter- Digital drum water level indicator in the boiler floor- Main steam flow transmitter 2 Nos.- Feed water flow transmitter 2 Nos.- Flow nozzle for steam flow- Control valve for feed water 2 Nos. (In which 1 No. 100% & 1 No. 30%)- I/P converter for feed control valve 2 Nos.- Orifice plate for water flow 1 No.- Drum pressure transmitter-1 No.- Drum level low low, high high alarm and tripping shall be generated from Owners DCS.- Main steam temperature low high, high high alarm and tripping shall be generated fromOwners DCS.

3.16.10.2 Combustion control- O2 analyser 1 No.- Combustion air flow element (Venturi at FD inlet) Each 1 No.- FD fan air damper actuator - power cylinder Each 1- I/P converter for FD fan actuator Each 1


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3.16.10.3 Furnace draft control- Furnace pressure transmitter 6 Nos.- ID fan damper cylinder Each 1

- I/P converter for ID fan power cylinder Each 1- Inlet/Outlet damper open/close limit switches Each 1

3.16.10.4 Steam temperature control. Desuperheater- Thermocouple - Inter stage Steam- I/p converter for spray water control valve 1 No.- Spray water Control valve 1 No.- Temperature Transmitter 3 Nos.- Main steam temperature element (Duplex) - 2 Nos.- Attemperator outlet steam temperature element( Duplex)1 No- Spray water flow transmitter 1 No.- Orifice for spray water flow 1 No.- Main steam temperature digital indicator (at operating floor)-1No.

3.16.10.5 Continuous blow down tank level control- Level Transmitter 1 No- Level control valve 1 No- I/P for control valve 1 No

3.16.10.6 Soot Blower pressure control with control panel- I/P converter- Control valve- Soot Blower sequence operation- Pressure Transmitter

3.16.10.7 Deareator- Deaerator level transmitter (2 out of 3 logic)- I/p converter

- Level Control valve- Deaerator overflow control level switch- On/ Off control with solenoid valve in deaerator to feed water storage tank line.- Pressure transmitter 2 Nos- temperature transmitter 2 Nos.

3.16.10.8 Pressure gauges- Drum pressure 1 No- Drum pressure ( at operating floor) 1 No- Auxiliary steam pressure - 2 Nos.- Attemperator Spray water line pressure 1 No.- HP dosing pump discharge pressure Each 1 No.- LP dosing pump discharge pressure Each 1 No.- FW before Control Valve 1 No.

- CBD tank pressure- Feed water pressure before Feed Control Station 1 No.- Feed water pressure before economiser 1 No.- Feed water pressure before economiser (at operating floor)-1 No.- Feed water pressure after Economiser- 1 No.- Main steam pressure -1 No.- Main steam pressure (at operating floor) -1 No.- Soot blower pressure (if required)- On each fuel line 2 Nos. each.- Feed water export line 2 Nos.- Cooling water lines supply and return.


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3.16.10.9 Temperature gauges- Steam temperature SH1 outlet -1 No

- FG temperature after economiser -1 No.- FG after air heater temperature-1 No.- FD air after air heater temperature-1 No.- Steam temperature at PSH inlet -1 No- Feed water Temperature after Economiser-1 No- Feed water Temperature at Economiser inlet-1 No- Main steam temperature-1 No- Secondary SH inlet temperature -1 No- on each fuel line 2 Nos.- BFW export line 2 Nos.- Cooling water supply and return line across each user.

3.6.10.10 Draught transmitters- FG at chimney inlet 1 No

- FD fan discharge 1 No- FD air after air heater 1 No- FG after boiler bank 1 No.- FG after economiser 1 No- FG after air heater 1 No- FG at furnace outlet 1 No- FG at super heater 1 outlet 1 No- FG at super heater 2 outlet 1 No

3.6.10.11 Temperature Elements (Duplex) and Transmitters- Feed water temperature after Economiser (RTD) -1 No- Feed water temperature before Economiser (RTD) -1 No- FD air after air heater (RTD) -1 No- FG after Economiser (RTD) -1 No

- FG after boiler bank (K Type T/C) -1 No + Transmitter- Steam temperature after DSH (K Type T/C) -1 No + Transmitter- Furnace temperature (R / S Type T/C) -4 No + Transmitter- FD fan discharge -1 No.- Flue gas at Economiser inlet -1 No (R/S type T/C) + Transmitter- Flue gas temperature at SSH outlet -1 No + Transmitter- Fuel line one each on line- BFW export line 2 Nos.

3.6.10.12 LevelTransmitters-HP/LP dosing tank level -1 No (Transmitter)- HP/LP dosing tank level low 1 No.

3.6.10.13 Level gauges

- Drum level 2 Nos.- IBD tank 1 No- CBD tank - 1 No- HP/LP dosing tank 1 No.

3.6.10.14 Vibration Measurement Monitors with control panel- For FD & ID fan in the drive end.- Boiler feed pump

3.6.10.15 Start up vent control- I/P for start up vent control valve 1 No


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- Position transmitter for control valve 1No

3.6.10.16 BMS for Start up Oil Firing system with PLC based control system shall be provided.

3.6.10.17 Stack Gas Analyzers with Panel in field

- Particulate emission- SOx

- NOx- O2

3.6.10.18 SWAS with control panel

3.17 ELECTRICAL

3.17.1 Refer technical specification for electrical equipments in utility boiler package (Doc No. 44LK-5100-712/E.02/0038) attached herewith this specification.

3.17.2 For the scope of work electrical, refer Annexure-1 Electrical scope of work (Doc No. 44LK-5100-712/E.02/0038) attached herewith this specification.

3.17.3 The MCC and PLC based control panel for the burner management system and othercontrol panels, local start-up panels, VSD panels etc. shall be supplied by vendor. MCCpanels and control panels shall be kept in the substation building located in the Boiler areaas indicted in the conceptual layout. This building shall be designed and engineered andconstructed by the Boiler vendor.Air conditioning required for the control room, switchgear room and VSD panel room insubstation building shall be provided by vendor. All design engineering, supply, erection,commissioning, performance guarantee of the HVAC system including MCC, controls,cablings, distribution boxes etc shall be by vendor.

3.17.4 The HVAC system shall be designed as per the engineering design basis attached with

the enquiry. Vendor shall provide air cooled condensers for VFD room, control room &switchgear room. Fire dampers shall be provided for isolation in each area.

3.18 CIVIL

3.18.1 Vendor to refer the document No. 44LK- 5100-712/C.02/ 1154/A4 for Scope of work forcivil, structural and architectural.

3.18.2 Topographical survey drawing for boiler area is attached herewith this specification. Thefinished floor level for boiler area shall be 18.4 m.

3.18.3 Vendor to refer the Engineering design basis-general civil, Engineering design basis-architectural attached herewith this specification.

3.18.4 Vendor to refer the various standard specifications & standard drawings attached herewiththis specification.

3.19 Vendor shall provide air conditioning system for VFD / control room/ Switchgear room inthe substation building. The complete design, engineering, manufacture, supply, erection,commissioning, performance guarantee for the air conditioning system shall be in thevendor scope of work. Vendor shall provide the heat load calculations for the proposed airconditioning system. A/C equipment layout and ducting layout shall be submitted byvendor for consultants / Owners review and approval.


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3.19.1 Lighting load 20 watts per m2

shall be considered for heat load calculation, this shall be inaddition to the load furnished above.

3.19.2 Vendor shall consider 20% margin on heat load calculations while selecting machine/units.

3.19.3 Noise level inside control room shall be less than 60 dBA. .

3.19.4 Duct sizing:

Vendor shall size all ducts as per SMACNA. Vendor to provide supply and return airduct system in all areas. Vendor to provide damper to isolate AHUs. Vendor to providefire damper in each system. Velocity of air inside the main supply ducts shall not exceed1500 fpm and in return ducts it shall not exceed 1000 fpm.All supply and return shall be provided with VCD as a minimum.

3.19.5 Type of refrigerant shall be non CFC type.

3.19.6 A/C Machine shall be suitable for continuous operation of 24 hours per day and 365 days.

3.19.7 Vendor shall provide Chemical Filter unit for Fresh Air for Control Room along with FreshAir Supply Fan. There shall be a separate Chemical Filter for each Air Handling Unit. ForVFD room fresh air shall be considered through filter. Chemical Filters are designed forISA class G1 outlet conditions. Chemical filter shall be selected for the chemical life ofminimum one year.

3.19.8 Fire dampers (CBRI certified) shall be provided for isolation of area as per OISD.

3.19.9 Heater shall be provided for dehumidification and winter condition.

3.19.10 Vendor to supply manometers, temp and humidity measurement at least 3 location in eachroom for air conditioned area,

3.19.11 All electrical work related to HVAC package shall be done by vendor. This include MCC,all cabling, cabling support trays specified and meet generally as per electrical workoutlined else where.

3.19.12 All instrumentation required for safe and continuous operation for HVAC system shall be invendor scope. Fire alarm signal shall be made available for tripping of units / operation offire damper. Vendor shall submit the complete instrumentation and control philosophy forthe air conditioning system.

3.20 NOISE

3.20.1 Noise level of all equipment shall be restricted to 85 dB (A) at 1 M distance

4.0 BATTERY LIMITS

4.1 Following utilities shall be made available on pipe rack at approx. elevation of 5m fromFGL at one point at vendors battery limit. All further distribution / routing etc. shall be byvendor. All battery limit lines shall be terminated with flanged connections by vendor. Alllines shall be terminated with isolation valves and blinds by vendor. Package vendor toindicate the utility requirements for boilers at package B/L for normal operation and start-up(both continuous and intermittent with rate & operating conditions i.e. pressure,temperature)

Service Vendors Scope of work Owners Scope of work


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1 DM water From one point at batterylimit

Up to one point at battery limit

2 Condensate From one point at batterylimit


3 Polishedcondensate

From one point at batterylimit


4 Main Steam andexport BFW

Up to one point at batterylimit

From one point at battery limit

5 Fuel Oil From fuel oil day tanknozzle

Up to fuel oil day tank nozzle

6 Fuel gas From one point at batterylimit


7 Flue gas Up to outlet of stack and upto one point at battery limitfor analysers

From one point at battery limitupto analyser inlet in analysershed.

8 Plant Air From one point at vendorbattery limit

Up to one point at vendorbattery limit

9 Instrument air From one point at vendorbattery limit


10 Cooling water supply/ return

From one point at vendorbattery limit


11 Sea cooling watersupply / return

From one point at vendorbattery limit


12 Drains Up to one point at Batterylimit with isolation vales.Drains for line containingoil and without oil shall beseparated. Funnel to beprovided at end point.

From one point at battery limit.

13 N2 gas From one point at batterylimit


14 Safety valve exhaustand vent

To atmosphere at safelocation

-

15 HP and LP dosingchemicals

From inlet of dosing tank At the inlet of dosing tank

4.2 Electrical

1 Power cabling Refer SLD andspecification attached

Refer SLD and specificationattached

2 Emergency power Not applicable


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4.3 Instrumentation

1 Cabling From field instruments toLCP, junction box, PLCcontrol panel

From LCP, JB, PLC controlpanel to plant DCS/PLC

4.4 OWNERS SCOPE OF WORK

4.4.1 Supply of utilities at one point.

4.4.2 Control Cabling from LCP to plant PLC/DCS.

4.4.3 Pipe rack design, engineering and construction up to battery limit (Boiler shed)

4.4.4 Fuel oil day tank.

5.0 INSPECTION AND TESTING

5.1 Equipment shall be subjected to stage-wise expediting, inspection and testing byOwner/PMC. Vendor shall submit quality assurance plans (QAP) before commencementof fabrication. Approved QAP shall form the basis of equipment inspection.

5.2 Fittings, valves, instruments, other accessories like filter etc., shall be duly tested andmanufacturers test certificates shall be furnished.

5.3 Material Test Certificates shall be submitted for all pressure parts. All the pressure vesselsshall be hydrostatically tested and inspected as per applicable codes and standards. Anyother tests as per data sheets, standards, and codes shall also be performed.

5.4 Vendor shall be responsible for obtaining approvals from the Chief Inspector of Boilers at

shop as well as at site for all boiler components falling under the purview of the StatutoryAuthorities (IBR). The original certificates of approval shall be passed onto the Owner.The Owner / PMC shall be kept informed of all negotiations between the vendor andStatutory Authorities.All other approvals from civil aviation, pollution control boards, CCOE, local authoritiesshall be obtained by vendor.

5.5 Hydraulic and performance tests in accordance with design codes shall be carried out.Valves and boiler mountings shall undergo hydraulic pressure and functional tests.Firebrick material shall be subject to tests as per manufacturers standard, vendor shallsubmit test certificates for all the tests performed by him in his shop.

5.6 Hydraulic testing

5.6.1 All pressure parts of the boiler, super-heaters, economisers, air pre heater, deaerator withtheir associated pipe-work and fittings shall be hydraulically tested in accordance withIndian Boiler Regulations and to the approval of the Owner and IBR Inspectorate.

5.7 Running Test:Boiler

5.7.1 The boiler casing tightness shall be tested by pressurizing the boiler to 1.5 times thefurnace design pressure and holding it for minimum 10 minutes. Loss in pressure shouldnot be more than 125 mm with a smoke bomb or equivalent test method.

5.7.2 Performance test of each boiler after successful completion of reliability test run shall be


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conducted as per ASME PTC 4.1 (losses method) and the following guaranteedparameters shall be demonstrated.a) Thermal efficiency of boiler.

b) Flue gas compositionc) Steam generation capacityd) Steam temperature control rangee) Turndown range of boilerf) Steam Quality: Conductivity at 25 C, Total silica, Total iron, Total Cu, Sodium (Na + K)as specified in Clause No. 2 Basic Design.g) Auxiliary steam consumption at 100%, 50% & 25% load.h) Auxiliary power consumption at 100%, 50% & 25% load.

5.7.3 All necessary equipment, instruments, etc. required for the performance testing shall beprovided by the Vendor and shall be calibrated before the conductance of the test.

5.7.4 Procedure for performance testing of boiler shall be furnished by the Vendor (to beapproved by the Owner/PMC) before conductance of the performance test for Owners/

PMC review and approval.

5.8 Deaerator testing

5.8.1 The materials used shall be of tested quality. Vendor shall submit material test certificatesand hydro-test certificates.

5.8.2 Performance testing of the De-aerator at site shall be conducted as per ASME PTC 12.3 toestablish the following guarantee parameters.

5.8.3 Deaerated water flow at MCR.A) Turndown range.B) Oxygen content in the entire turndown range

5.9 Forced Draft Fans / Induced Draft fans

5.9.1 Performance test on FD fans shall be carried out at manufacturers works in accordancewith BS 848 and / or AMCA 210.

5.9.2 The tolerance on power consumption, speed input and air delivery shall be in accordancewith BS 848 Class A.

5.10 Performance test for boiler feed water pumps & BFW Export pumps shall be carried out atmanufacturers works.

5.10.1 The inspection and testing of BFW pump shall include material test certificates, hydro testreports, ND test reports, balancing test report and performance test report

6.0 FIELD TEST

6.1 The boiler package shall be subjected to field trial run for 48 hours of continuousuninterrupted operation. During the field trials safe and satisfactory operation of the boilerunit shall be established. This run shall be carried out during total plant reliability run. Othertests for Boiler and auxiliaries shall be carried out as indicated in the attached indicativetest plans and other documents in the RFQ.

7.0 GUARANTEES

7.1 Mechanical:


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Vendor shall stand guarantee against defective materials and workmanship for the periodspecified in commercial terms and conditions.

7.2 Performance:The equipment shall be guaranteed for satisfactory performance at all operating conditionson the data sheet and performance curve. Field checks on performance, when made bythe Owner, shall be made within the agreed time of initial operation

7.3 The offered boiler shall be capable of operating at 110% of the MCR rating for a period ofminimum 30 minutes in each 8 hrs shift.

7.4 The boiler package vendor shall guarantee the followings operating conditions for all thecases of fuels (fuel oil, fuel gases or any combination of fuels):a) Rated capacity & efficiency of boiler (min. 90%)b) Steam pressure, steam temperature and quality of steam.c) Turndown ratiod) Boiler Blow-down (quantity, frequency, composition and temperature)

e) No leakage of flue gases from furnace.f) Steam consumption for auxiliaries.g) Power consumption for auxiliaries.h) Fuel consumption for full load, 50% load, 25% load based on calorific valuei) Composition of flue gases at the chimney/stack (limited to permissible levels)j) Utility consumption.

7.5 The above guarantees shall be stated clearly in bid and are to be demonstrated by tests.The thermal efficiency given for MCR is to be guaranteed and the test result is to be within+2% of the figures specified. All instruments shall be calibrated and no further instrumenttolerance shall be applied.

7.6 The thermal efficiency is to be based on the gross calorific value of the fuel in the `as firedcondition and a curve is to be submitted which will enable the guarantee to be adjusted if

calorific value of test fuel, as established by sampling, differs from that on which theguarantee is based. The curve shall be submitted at tender stage for the variation ofG.C.V.

7.7 Overall efficiency of boiler unit shall be determined as per ASME PTC-4 code indirectmethod with following conditions:- Net Boiler capacity of 100 TPH at specified pressure and temperature conditions atbattery limit- Export BFW requirement of 50 TPH at specified temperature, even when the boilers areout of service.- Min. ambient temperature for combustion air- No condensate return- Boiler fuel as typical refinery fuel gas- Normal ambient temperature

7.8 Should the unit supplied fail to achieve the specified performance under the givenconditions, vendor shall carryout all modifications or replacements to the unit as necessaryto meet the required performance within the mutually agreed time period. The test shall beagain carried out to prove the performance.

7.9 The unit shall be in commercial operation at least for specified duration (min. 72 hrs.)before the performance tests are carried out to prove the performance guarantee.

8.0 PROTECTION AND PAINTING


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8.1 Painting of the equipment shall be as per attached specification.

9.0 PACKAGING AND IDENTIFICATION

9.1 All packaging shall be done in such a manner as to reduce the volume. The equipmentshall be dismantled into major components suitable for shipment and shall be properlypacked to provide adequate protection during shipment. All assemblies shall be properlymatch marked for site erection.

9.2 Attachments, spare parts of the equipment and small items shall be packed separately inwooden-cases. Each item shall be appropriately tagged with identification of mainequipment, its denomination and reference number of the respective assembly drawing.

9.3 Detailed packing list in waterproof envelope shall be inserted in package together withequipment.

9.4 Each equipment shall have an identification plate giving salient equipment data, make,

year of manufacture, equipment number, name of manufacturer etc.

10.0 SPARE PARTS

10.1 As a minimum operational/maintenance spares as defined under mandatory spare part listin the enquiry document and commissioning spares as recommended by the manufacturershall be included in the basic price.

10.2 Recommended list of spare parts with recommended quantities and itemised prices fortwo years of operation of the equipment shall be submitted. Proper coding and referencingof spare parts shall be done so that later identification with appropriate equipment will befacilitated.

10.3 Recommended spare and their quantities shall take into account related factors of

equipment reliability, effect of equipment down time upon production or safety, cost ofparts, and availability of vendors service facilities around proposed location of equipment.

10.4 Set of special tools and tackles if required for erection, field assembly and maintenance ofeach component of the utility boiler package should be supplied and included in basicprice.

Documents

A.1 Job Spec Boiler Package Rev B