43 00 00 - Lpg Installation

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Private Residence on Plot #9, Sec. E/49, Eastern Mangrove, Abu Dhabi, UAE

Main Contract

Bureau of Excellence in Architecture & Design Revision (0)www.bead-architects.com Project :A10 - 18

September. 2011 1

Sec. 43 00 00

SECTION 43 00 00

LIQUEFIED PETROLEUM GAS(LPG)

REVISION HISTORY

0 Sep. 2011 Issued for Tender AK AK HM

1 May. 2011 Detailed Design Submission AK AK HM

0 Feb. 2011 Preliminary Submission AK AK

Rev Date Description of revision Preparedby

Checkedby

Author izedby


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SECTION 43 00 00

Liquefied Petroleum Gas (LPG)

INDEX

PART 1 - GENERAL...................... ............. ............. ............ .............. ............ ............. .............. ............. ............ 2

1.1 REFERENCE ................................................................................................................................. 21.2 DESCRIPTION OFWORK............................................................................................................ 21.3 QUALITYASSURANCE .............................................................................................................. 21.4 SUBMITTALS ............................................................................................................................... 21.5 PRODUCTDELIVERY,STORAGEANDHANDLING.............................................................. 3

PART 2 - PRODUCTS ...................................................................................................................................... 3

2.1 LPGSTORAGETANK................................................................................................................. 32.2 CONTAINERAPPURTENANCES.............................................................................................. 5

2.3 PIPING,FITTINGS

AND

VALVES ............................................................................................. 82.4 GASLEAKDETECTIONSYSTEM............................................................................................. 9

PART 3 - EXECUTION................................................................................................................................... 12

3.1 GENERAL................................................................................................................................... 123.2 TESTINGANDCOMMISSIONING .......................................................................................... 12


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PART 1 - GENERAL

1.1 REFERENCE

Conform to General Requirements for Mechanical Services.

1.2 DESCRIPTION OF WORK

1.2.1 Furnish and install LPG installation as indicated on drawings

1.2.2 This section specifies the requirements for the LPG components.

1.2.3 Provide electrical work related to this section and complying with requirements of electrical

devision.

1.3 QUALITY ASSURANCE

1.3.1 Manufacturers Qualifications: Firms regularly engaged in manufacture of LPG storage tanks

and distributory components with characteristics, sizes and capacities required, whoseproducts have been in satisfactory use in similar service for not less than 5 years.

1.3.2 Professional CONSULTANT Certification: Approval/compliance certification shall besubmitted from the following agencies to certify that the professional CONSULTANT is

legally qualified to practice in the jurisdiction where project is located and who is experienced

in providing consultation services of the kind indicated:

a) Local Civil Defense Authority (Abu Dhabi Civil Defense)

b) ADNOC FOD

c) NFPA 58

d) British Standards Code of Practice LPG 1TA.

1.4 SUBMITTALS

1.4.1 Product Data: Submit manufacturers product specifications, installation and startupinstructions.

1.4.2 Shop Drawings: Submit shop drawings indicating tank locations, weight loadings, required

clearances and LPG pipe work distribution complete with valves, fittings and controls.

1.4.3 Submit the following elements of the LPG Distribution and Storage System: Pipe and fittings,

valves, dielectic unions, strainers, meters, instruments, storage tanks, leak detection and alarmsystem.

1.4.4 Steel Pipes:

Statement from manufacturer on his letterhead that the pipe furnished meets the internationalstandards specified and contained in this section.. Subcontractor shall submit the Mill

certification papers, also known as material test reports, for the pipe furnished for this project,

in English. Code numbers on these papers to match the code numbers stenciled on the pipe.Chemical analysis indicated on the mill certification papers to meet or exceed the

requirements of the referenced International Standard specification.

1.4.5 Certificates to be provided for welding procedure with qualification of welders including listof welders names and symbols.

1.4.6 Wiring Diagrams : Submit manufacturers electrical requirements for power supply wiring.

Submit manufacturers ladder-type wiring diagrams for interlock and control wiring. Clearly

differentiate between portions of wiring that are factory installed and portions to be field-


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installed.

1.4.7 Maintenance Data: Submit maintenance data and parts lists for each component control and

accessory, including trouble shooting maintenance guide. Include this data, product data,shop drawings and wiring diagrams in maintenance manual.

1.4.8 List of spare parts for two years operation and maintenance of complete system.

1.5 PRODUCT DELIVERY, STORAGE AND HANDLING

1.5.1 Handle LPG System components carefully to prevent damage, breaking, denting and scoring.Do not install damaged components, replace with new.

1.5.2 Store LPG system components in clean dry place. Protect from weather, dirt, fumes, water,construction debris, and physical damage.

PART 2 - PRODUCTS

2.1 LPG STORAGE TANK

2.1.1 General

a) This section includes design, fabrication and marking provisions for containers, and

features normally associated with container fabrication, such as container openings,

appurtenances required for these openings to make the containers gastight entities,

physical damage protecting devices, and container supports attached to, or furnished with

the container by the manufacturer.

b) Containers shall comply with 2.1.1 (c) or shall be designed, fabricated, tested and marked

using criteria which incorporate an investigation to determine that it is safe and suitable

for the proposed service, is recommended for that service by the manufacturer and is

acceptable to the authority having jurisdiction

c) Containers shall be designed, fabricated, tested and marked (or stamped) in accordance

with the Regulations of the U.S. Department of Transportation (DOT), the "Rules for the

Construction of Unfired Pressure Vessels", Section VIII, Division 1, ASME Boiler and

Pressure Vessel Code, or the API-ASME Code for Unfired Pressure Vessels for

Petroleum Liquids and Gases applicable at the date of manufacture.

d) Containers showing serious denting, bulging, gouging or excessive corrosion shall be

removed from service.

e) Repair or alteration of containers shall comply with the Regulations, Rules or Code under

which the container was fabricated. Other welding is permitted only on saddle plates,

lugs or brackets attached to the container by the container manufacturer.

f) Heating or cooling coils shall not be installed inside storage containers.

g) Containers shall be painted either with yellow colour using a paint made with a medium

yellow chrome pigment or white colour with a titanium oxide pigment.


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2.1.2 Container Design or Service Pressure

a) The minimum design, or service, pressure of DOT specification containers shall be in

accordance with the appropriate DOT regulations.

b) The minimum design pressure for ASME containers shall be in accordance with Table

2.1.2.

c) Containers shall be designed to be self-supporting without the use of guy wires and

shall satisfy proper design criteria taking into account wind, seismic (earth-quake)

forces, and hydrostatic test loads.

d) Design pressure (see Table 2.1.2) shall be interpreted as the pressure at the top head

with allowance made for increased pressure on lower shell sections and bottom head

due to the static pressure of the product.

Table 2.1.2

For Gases with Vapor Pressure in psig

(MPa gauge) at 100 Deg.F (37.8 Deg.C)

not to Exceed

Minimum Design Pressure in psig (MPa

gauge) ASME Code

Section VIII, Division 1, 1980 Edition(Note 1)

80 (0.6) 100 (0.7)

100 (0.7) 125 (0.9)

125 (0.9) 156 (1.1)

150 (1.0) 187 (1.3)

175 (1.2) 219 (1.5)

215 (1.5) 250 (1.7)

215 (1.5) 312.5 (2.2)

e) Wind loading on containers shall be based on wind pressures on the projected area atvarious height zones above ground in accordance with Design Loads for Buildings andother structures, ANSI A58.1. Wind speeds shall be based on a Mean Occurrence

Interval of 100 years.

2.1.3 Container Openings

a) Containers shall be equipped with openings suitable for the service in which the

container is to be used. Such openings may be either in the container proper or in the

manhole cover, or part in one and part in the other.

b) Connections for pressure relief valves shall be located and installed in such a way as to

have direct communication with the vapor space, whether the container is in storage or

in use. If located in a well inside the container with piping to the vapor space, thedesign of the well and piping shall permit sufficient pressure relief valve relieving

capacity. If located in a protecting enclosure, design shall be such as to permit this

enclosure to be protected against corrosion and to permit inspection.

c) Containers shall be fabricated so that they can be equipped with a fixed liquid level

gauge(s) capable of indicating the maximum permitted filling level(s).


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2.1.4. Container Markings

a) Containers shall be marked as provided in the Regulations, Rules or Code under which

they are fabricated and in accordance with 2.1.4 (b) and 2.1.4 (c).

b) When LP Gas and one or more other compressed gases are to be stored or used in the

same area, the containers shall be marked "Flammable" and either "LP-Gas," "Propane"or "Butane."

c) ASME containers shall be marked as noted hereunder. The markings specified shall be

on a metal nameplate attached to the container, so located as to remain visible after the

container is installed. The nameplate shall be attached in such a way that corrosion of

the nameplate or the container will be minimized:

i) Service for which the container is designed; i.e. underground, above ground,

or both.

ii) Name and address of container supplier or trade name of container.iii) Water capacity of container in lb or U.S. Gallons.

iv) Design pressure in psig.

v) The wording "This container shall not contain a product having a vaporpressure in excess of- psig at 100 deg.F".

vi) Tare weight of container fitted for service for containers to be filled by weight.

vii) Outside surface area in sq. ft.viii) Year of manufacture.

ix) Shell thickness Head thickness

x) OL - OD - HD

xi) Manufacturer's Serial Number.

xii) ASME Code Symbol.

2.2 CONTAINER APPURTENANCES

2.2.1 General

a) This section includes fabrication and performance provisions for container

appurtenances, such as pressure relief devices, container shut off valves, backflow

check valves, plugs, liquid level gauges and pressure gauges connected directly into the

container openings.

b) Container appurtenances shall be fabricated of materials suitable for LP-Gas service

and resistant to the action of LP-Gas under service conditions The following shall also

apply:

i) Pressure containing metal parts of appurtenances, shall have a minimum

melting point of 1500 deg. F (816 deg.C) such as steel, ductile (nodular) iron,

malleable iron or brass. Ductile iron shall meet the requirements of ASTM A

395 or equivalent and malleable iron the requirements of ASTM A 47 orequivalent.

ii) Cast iron shall not be used for parts such as bonnets or bodies.

c) Container appurtenances shall have a rated working pressure of at least 250 psig (1.7

MPa gauge).

d) Gaskets used to retain LP-Gas in containers shall be resistant to the action of LP Gas.They shall be made of metal or other suitable material confined in metal having a

melting point over 1500 deg. F (816 deg.C) or shall be protected against fire exposure,except that aluminium O-rings and spiral wound metal gaskets are acceptable. When a


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flange is opened, the gasket shall be replaced.

e) Each tank shall be equipped with at least:

i) A continuous liquid level monitor with remote indicator.

ii) A fixed maximum level gauge eg. of the vent-valve type, with 1.5 mm or lessorifice diameter.

iii) A shut-off device for each connection of the outlet pipes for both gaseous and

liquid phases and in addition an excess flow valve for the liquid phase.

iv) A safety relief valve, it may be of the internal or external type. The minimum

rate of discharge shall be calculated to the formula:

Discharge rate = 10.6552 S0.82m3/Min air at 1 atm.

S = Total exterior surface in m2.

2.2.2. Pressure Relief Devices

a) Containers shall be equipped with one or more pressure relief devices which shall be

designed to relieve vapor.

b) DOT containers shall be equipped with pressure relief valves or fusible plug devices as

required by DOT Regulations.

c) ASME containers for LP-Gas shall be equipped with direct spring-loaded pressurerelief valves conforming to applicable requirements of the Standard on Safety Relief

Valves for Anhydrous Ammonia and LP Gas, UL 132; Standards for Safety Relief

Valves of the Factory Mutual Research Corporation; or other equivalent pressure reliefvalve standards. The start to leak setting of such pressure relief valves, with relation to

the design pressure of the container shall be in accordance with Table 2.2.2.

Table 2.2.2

Containers Minimum Maximum

All ASME Codes prior to 1949 Edition and the 1949

Edition paragraphs U-68 and U-69.

110% 125%

ASME Code, 1949 Edition Paragraphs U-200 and

U-201 and all ASME Codes later than 1949

100% 100%

Manufacturers of pressure relief valves are allowed a plus tolerance not exceeding 10percent of the set pressure marked on the valve.

d) Pressure relief valves for ASME containers shall also comply with the following:

i) Pressure relief valves shall be of sufficient individual or aggregate capacity as

to provide the relieving capacity for the container on which they are installedand to relieve at not less than the rate indicated before the pressure is in excess

of 120 percent of the maximum (not including the 10 percent referred to in thefootnote of Table 2.2.2) permitted start-to-leak pressure setting of the device.

ii) Each pressure relief valve shall be plainly and permanently marked with:

The pressure in psig at which the valve is set to start-to-leak;

Rated relieving capacity in cu ft. per minute of air at 15.6 deg. C and

0.1 MPa absolute.

The manufacturer's name and catalogue number. Example: A pressure

relief valve is marked 250-4050 AIR. This indicates that the valve is

set to start to leak at 1.7 MPa gauge; and that its rated relieving capacity


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is 1.9m3/s of air.

iii) Shut off valves shall not be located between a pressure relief device and thecontainer, unless the arrangement is such that the relief device relieving

capacity flow specified in 3.2.4 (a) will be achieved through additional

pressure relief devices which remain operative.

iv) Pressure relief valves shall be so designed that the possibility of tampering

will be minimized. Externally set or adjusted valves shall be provided with an

approved means of sealing the adjustment.

2.2.3. Connections for Flow Control (Filling, Withdrawal, Equalizing).

a) Shut off valves, excess-flow check valves, back flow check valves and quick closinginternal valves, used individually or in suitable combinations, at container filling,

withdrawal and equilizing connections, shall comply with 2.2.3 (b) and 2.2.3 (c).

b) Filling, withdrawal and equilizing connections shall be equipped with the

appurtenances for the appropriate type and capacity of container and the service in

which they are to be used. Cylinder valve outlet connections on all DOT cylindersfrom which vapor can be withdrawn, shall not be interchangeable with those used for

liquid withdrawal.

c) Manual shut off valves shall be designed to provide positive closure under service

conditions.

d) Excess flow check valves shall be designed to close automatically at the rated flows of

vapor or liquid specified by the manufacturer. Excess flow valves shall be designedwith a bypass, not to exceed a No. 60 drill size opening, to allow equalization of

pressure.

e) Backflow check valves, which may be of spring loaded or weight-loaded type with in

line or swing operation, shall close when flow is either stopped or reversed. Both

valves of double backflow check valves shall comply with this provision.

f) The appurtenances specified herein above may be installed as individual components oras combinations completely assembled by the appurtenance manufacturer.

2.2.4. Liquid Level Gauging Devices

a) Liquid level gauging devices shall be provided on all containers filled by volume.

Fixed level gauges or variable gauges of the slip tube, rotary tube or float types (or

combinations of such gauges) may be used to comply with this provision.

b) Variable liquid level gauges shall be so marked that the maximum liquid level, orpercent of capacity of the container in which they are to be installed, is readily

determinable.

c) The markings indicating the various liquid levels from empty to full shall either be

directly on the system nameplate and on the gauging device.

2.2.5 Other Container Connections

a) Container openings shall be equipped with a positive shut off valve in combinationwith an excess-flow valve.

b) First and second stage vapour pressure regulators shall be sized to bring down the


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pressure of gas to the required pressure. The regulators shall be complete with pressure

relief and venting devices in accordance with NFPA 58.

2.3 PIPING, FITTINGS AND VALVES

2.3.1. General

This section includes basic design provisions and material specifications for pipe, tubing, pipeand tubing fittings, valves used to connect container appurtenances with the balance of the LP

Gas system.

2.3.2. Pipe

a) LPG fill line shall be seamless steel to BS 1387 Class C.

b) Below grade Distribution pipework shall be seamless steel to BS 1387 Class-C with

factory applied polyethylene sleeve.

c) Above grade distribution pipework shall be copper to BS 2871 Table Y

d) Final connections to equipment shall be soft copper tubes to BS 2871 TableX.

2.3.3. Pipe and Tubing Fittings

a) Pipe joints in steel, brass or copper pipe shall be welded or brazed.

b) Fittings used at pressure higher than container presure such as on the discharge of

liquid transfer pumps shall be suitable for a working pressure of at least 350 psig (2.4

MPa gauge).

c) Fittings used with liquid LP-Gas, or with vapor LP-Gas at operating pressures over 125

psig (0.9 MPa gauge) shall be suitable for a working pressure of at least 250 psig (1.7

MPa gauge).

d) Fittings for use with vapor LP-Gas at pressure not exceeding 125 psig (0.9 MPa gauge)

shall be suitable for a working pressure of 125 psig (0.9 MPa gauge).

e) Soldering or brazing filler material shall have a melting point exceeding 1,000 deg. F

(538 deg. C).

2.3.4. Valves, Other than Container Valves

a) Pressure containing metal parts of valves (except appliance valves), including manualpositive shut off valves, excess flow check valves (either manually or automatically

operated), used in piping systems shall be of steel, ductile (nodular) iron, malleable iron

or brass. Ductile iron shall meet the requirements of ANSI/ASTM A 395 or equivalent

and malleable iron the requirements of ANSI/ASTM A 47 or equivalent. All materialsused including valve seat discs, packing, seals and diaphragms shall be resistant to the

action of LP Gas under service conditions.

b) Valves shall be suitable for the appropriate working pressure, as follows:

i) Valves used at pressures higher than container pressure, such as on thedischarge of liquid transfer pumps shall be suitable for a working pressure of

at least 350 psig (2.4 MPa gauge). [400 psig (2.8 MPa gauge) WOG valves

comply with this provision].


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ii) Valves to be used with liquid LP Gas, or with vapor LP-Gas at pressures in

excess of 125 psig (0.9 MP a gauge), but not to exceed 250 psig (1,.7 MPa

gauge), shall be suitable for a working pressure of at least 250 psig (1.7 MPa

gauge).

iii) Valves (except appliance valves) to be used with vapor LP Gas at pressures

not to exceed 125 psig (0.9 MPa gauge) shall be suitable for a working

pressure of at least 125 psig (0.9 MPa gauge).

c) Manual shut off valves, excess flow check valves and backflow check valves used inpiping systems shall comply with the provisions for container valves.

d) Emergency shut off valves shall be approved and incorporate all of the following

means of closing.

i) Automatic shut off through thermal (fire) actuation. When fusible elements

are used they shall have a melting point not exceeding 250 deg.F (121 deg.C).

ii) Manual shut off from a remote location.

iii) Manual shut off at the installed location.

e) Solenoid valves shall be intrinsically safe construction suitable for 24V DC power

supply.

2.4 GAS LEAK DETECTION SYSTEM

A gas leak detection system shall be installed to monitor for gas leaks at different locations of

the gas network.

2.4.1 Control Panel

a) The central control panel shall be located in the control room at Administration

Building and shall easily be accessible in the event of an emergency.

b) The central panel shall have a modular design incorporating input alarm/displaymodule for each gas detector. Each channel shall have indication for low alarm at 15%

LEL, high alarm at 30% LEL and fault at 0-100% LEL indicator.

Main LPG supply shall be shut off at 30% LEL indication.

c) The concentration of the gas shall be displayed on a common indicator with selector

switches to display the concentration of the desired channel or zone indicator.

d) Below the gas control panel is the system control panel which shall have the following

indications:

AC healthy

DC healthy

Sprinkler on

Gas pressure lowGas pressure high

Gas solenoid valve operated

Common fire signalsGas leak high

The panel shall have the following switches:Sprinkler manual operate

Gas manual shut off

Test lamp


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System reset

2.4.2 Gas Detectors

The gas detectors shall use a pellistor sensor to detect flammable gases and vapours. The sensorshall be housed in a stainless steel, flame proof housing, fitted onto an explosion proof junction

box.

2.4.3 Sounder Flasher

A sounder cum flasher unit shall be installed in the vicinity of the panel located in a visible area.

2.4.4 Cables

MICC cables of at least 1.5 sq. mm area shall be used to interconnect between each detector and

the control panel.

2.4.5 Logic of operation

When low level gas leak is detected in any zone, local internal alarm and indication shall show

on the control panel. When high level gas leak is detected in any zone, the following sequenceshall occur:

a) The solenoid valve in the gas distribution channel shall be closed automatically.

b) External alarm shall be operated.

Connection to the fire alarm system:

In the event of a fire alarm signal, the following sequence shall occur:

a) The solenoid valve in the gas distribution channel shall be closed automatically.

b) The sprinkler system over the LPG storage tanks shall operate.

In the event of an emergency, it shall be possible to by pass the automatic system and operate the

system manually, this shall include:

a) Manual shut off/on of the gas through the emergency shut-off push button.

b) Manual operation of the sprinkler system On/Off

c) Manual reset


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PART 3 - EXECUTION

3.1 GENERAL

3.1.1 All pipe work, pipe supports and brackets shall be painted with 2 undercoats and 2 finishingcoats of yellow colour paint.

3.1.2 LPG piping shall be painted with a specific colour different than other pipes. Orange or yellowcolours are recommended. Valves shall also be painted. Direction arrows to indicate the flow of

gas in the system shall be painted.

3.1.3 The system in parts and as a whole shall be tested to ensure that it will operate safely, withoutleaks and to the satisfaction of the local Civil Defence Authority.

3.1.4 Commissioning of the system shall be carried out to demonstrate that all the equipment and thewhole system are in good working order.

3.1.5 The LPG contractor shall accommodate any additional testing required by authorities such as

Civil Defence in order to obtain their acceptance of the system.

3.1.6 The gas network shall be leak tested using gases such as nitrogen or argon. Oxygen or

flammable gases will not be used. The leak test shall include all the different pressure stages ofthe system including:

a) The filling line operating pressure up to 20 bar.

b) The tank and high pressure stage operating pressure 16.5 barc) The first stage regulator operating pressure 1.5 bar.

d) The second stage pressure, operating pressure 37 mbar.

3.1.7 Test pressure shall be at least 1.5 times the operating pressure. The leak test duration shall be 1

hour. The specified test pressure shall be monitored for a minimum of one hour during which

the soap water method shall be used to leak test every joint. If no leak is detected and thepressured gauge indicates no drop in the test pressure then the system will be proven to be leak

free.

3.1.8 If a leak is found, the leaking joint shall be repaired or the leaking equipment shall be replaced.The testing procedure shall be repeated to prove the complete system as leak free.

3.1.9 A test report shall be submitted for approval.

3.2 TESTING AND COMMISSIONING

3.2.1 Before installations are handed over or subjected to inspection and testing, the entire

installation shall be thoroughly cleaned, both internally and externally.

3.2.2 Purging

Vessels and their ancillary equipment shall be purged until the oxygen level is reduced below

that which will support combustion before commissioning.

When purging into or out of service is required this shall be carried out in accordance withLPGA Code of Practice No. 17.

3.2.3 LPG shall not be introduced into a pipework system unless it has passed a leak test for the

entire system to be commissioned, and signed records are available.


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3.2.4 Purging of pipework systems shall only be carried out by or under the supervision of

competent persons. Pipework should be purged with an inert gas e.g. nitrogen, so that the

oxygen level is reduced to less than 9% by volume, before introducing LPG. Purge gas should

be introduced in a controlled manner using an adjustable pressure regulator.

3.2.5 When commissioning liquid systems, sudden chilling of the system from rapid vaporisation

shall be avoided by precharging with LPG vapour up to vapour pressure before introducing

liquid, or by pre-pressurisation with the inert gas.

3.2.6 During the introduction of LPG the gas shall be released at a safe location and must not beallowed to accumulate in any confined space.

3.2.7 The introduction of LPG may be undertaken in sections if necessary, provided suitable purge

gas release points have been provided.

END OF SECTION

Documents

43 00 00 - Lpg Installation