(External Insulation for Hot Service)

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EXTERNAL

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SERVICE FWP SPT PROJECT

PROJECT SPECIFIC PROCEDURE

2572-8430-SP-0001

PAGE 2 OF 12

REV. O1

DSN 6387

CONTENTS

1. SCOPE..................................................................................................................................... 32. DESIGN ................................................................................................................................... 33. MATERIALS .......................................................................................................................................... 6

4. INSTALLATION....................................................................................................................... 8

EXHIBIT "A" INSULATION THICKNESS FOR HEAT CONSERVATION

EXHIBIT "B" INSULATION THICKNESS FOR PERSONNEL PROTECTION

ATTACHMENTS:

GP 14-01-01, July 2005 EXTERNAL INSULATION

EBP 14-01-01-A, March 2005 PERSONNEL PROTECTION CAGES IN PLACE OF

THERMAL INSULATION TO PREVENT CORROSIONUNDER INSULATION.

EBP 14-01-01-B, March 2005 ALUMINIUM FOIL TO PREVENT EXTERNAL SCC ON

INSULATED STAINLESS STEEL PIPING AND

VESSELS.

EBP 19-01-01-B, March 2005 THERMAL SPRAY ALUMINIUM TO PREVENT

CORROSION UNDER INSULATION.


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I. SCOPE

A. This Job Specification defines the requirements for external insulation of piping and

equipment in hot service, for the purpose of saving heat and protection of personnel.

Equipment to be insulated includes vessels, drums, heat exchangers, pumps, turbines

and other components.

B. The requirements of this Job Specification shall be applied to the SPA Plant of

Singapore Chemical Complex in Jurong Island - Singapore and shall be considered in

addition to the attached EXXONMOBIL CHEMICAL specifications.

C. The requirements of NACE Standard RP0198 (Latest), The Control of Corrosion

Under Thermal Insulation and Fireproofing Materials shall be complied with.

D. Requirements regarding the extent of insulation, based on the intended service, shall

be specified on the following project documents:

1. Engineering Flow Diagrams (P&IDs)

2. Line Classification Lists

3. Piping Isometric Drawings

4. Instrument Piping Details

5. Vessel and Equipment Insulation Schedule

6. Other specific documents.

In case of conflict between this Job Specification and the above mentioned

documents, Vendor has to bring this to FWP attention for clarification before to

proceed.

II. DESIGN

A. The service or purpose for which insulation is required shall be classified and

identified with the symbols as follows:

1. HC - Heat Conservation

Insulate to conserve heat inside the equipment/piping.

2. PP - Personnel Protection

This shall be complied as per para 4.4of EXXONMOBILCHEMICAL GP

14-01-01.

B. The normal operating temperature of the fluid shall be used to determine insulation

requirements, with the following clarifications:


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1. Where a vessel has sections operating at different temperatures, each section

may be insulated as required to suit its operating temperature.

2. For jacketed piping or equipment, the temperature of the fluid in the jacket

shall be used.

3. Unless indicated for specific cases, conditions such as may occur during start-

up, shut-down, steam-out, process upset, regeneration etc. need not be

considered in determining insulation requirements. However, when the

surface temperature may exceed 65C, PP shall be considered.

C. Instrument components subject to flow and/or temperature conditions approximating

those in the piping or equipment to which they are connected shall be insulated to thesame requirements.

D. Piping returning steam condensate shall be insulated for personnel protection only.

E. Insulation shall be omitted on the items listed below. However, where personnel

protection is required, the relevant protection system shall be used.

1. All equipment and piping where heat loss is desired (such as coolers and

condensers). In these cases personnel shield may be considered in lieu of

insulation.

2. Valve bodies, flanges, flanged fittings and unions except where specified.

Also refer to para 4.3(3) of EXXONMOBIL CHEMICAL GP 14-01-01 forapplicability of insulation of flanged joints.

3. Piping and equipment which becomes hot intermittently, such as relief valves,

relief systems, vents, drains, pump-out and blowdown systems, steam-out and

purge steam systems.

4. Strainers and filters, unless specified.

5. Steam traps.

6. Bellows portion of expansion joints, hinged joints, and hose assemblies.

7. Sight flow indicators.

8. Nameplates on vessels, exchangers, and machinery.

9. Supports for piping or equipment, except as required for support skirts in

Para. II.J.

10. Channel cover on shell and tube heat exchangers.


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11. Instrument components.

F. Multiple layer thermal insulation systems are required when the operating system is

above 600F (315C) or the required thickness of insulation is greater than 3 (75

mm)

G. When the valves shall be insulated, the following shall be complied with.

Bodies of flanged valves, including control valves, in insulated lines, shall be

insulated using same insulation thickness as the pipe. Valve bonnets shall not be

insulated.

H. If the support skirts for vertical vessels are not fireproofed, the insulation on vessels

shall be carried below the tangent line for a distance of 600 mm, but it shall end not

less than 300 mm above support concrete or steel. If the skirt is fireproofed, the

insulation shall extend to the top of the fireproofing and aluminum coated steel,

stainless steel or galvanized steel jacketing shall be used from the top of the

fireproofing to at least 600 mm above the tangent line.

I. Insulation thickness given in Exhibits A and B and at para. II.A are for heat

conservation and personnel protection.

J. Insulated piping in pipe racks shall be supported on steel shoes. The height of the

shoe shall be such that the bottom of insulation is above the support upon which theshoe rests.

K. Compressors, pumps and other mechanical equipment shall be insulated on an

individual basis with consideration given to the requirements for process access and

equipment maintenance. Equipment Manufacturer shall be informed about insulation

of his equipment.

L. Insulation shall be protected from the weather, spillage, mechanical wear, or other

damage by a metal jacket. Weatherproofing mastic may be used on irregular surfaces

or on surfaces for which metal jacketing is not practical.

M. Insulation support rings shall be provided on vertical piping and vessels. The spacingof the rings shall coincide with the insulation expansion joints. Vertical vessels shall

have minimum of 2 insulation support rings; one at or below the bottom tangent line

and one at the top tangent line, supplied (and welded in place) by vessel Vendor.

Support rings on carbon steel equipment shall be Carbon Steel, on Stainless Steel and

Alloy equipment; supports shall be fabricated using the same material as the

equipment. On vertical pipes, insulation Contractor shall provide positive means for

support the insulation (e.g. support rings firmly clamped to the pipe).

Clamp type support rings shall be manufactured from 5 to 6 mm thick plate and shall

match the piping material. The clamp shall be coated to resist corrosion if the piping


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is also coated. Galvanized clamps shall not be permitted on stainless steel, alloys

greater than 9% Chromium or piping which operates above 370C.

N. Expansion joints in the insulation shall be used to provide for differences in thermal

expansion between the insulation material and the piping or equipment material.

Expansion joints shall be packed with a loose fiber insulation material. On vessels, a

25 mm. wide space packed with loose insulating fiber shall be provided around all

nozzle and manway necks, or any other attachment to the vessel wall. Maximum

spacing for circumferential and longitudinal expansion joints on vessels and piping

shall be as follows:

TEMPERATURE [C] MAX. JOINT SPACING [m]

From To

65 120 9.0

121 200 4.5

201 315 3.5

316 480 3.0

On vertical piping and vessels, the expansion joints shall be located under the

insulation support rings.

See also para 4.9 (3)of attached EXXONMOBIL CHEMICAL GP 14-01-01.

III. MATERIALS

A. Basic Insulation Material

1. The materials to be used for hot insulation shall be as follows:

a. Expanded perlite, type II, in accordance with ASTM C610 Standard

Specification for Expanded Perlite Block and Pipe Thermal

Insulation.The chemical analysis of the expanded perlite shall be measured in

accordance with ASTM C871 Standard Methods for Chemical

Analysis of Thermal Insulation Materials for Leachable Chloride,

Fluoride, Silicate and Sodium Ions and shall comply with the

requirements of ASTM C795 Standard Specification for Wicking -

Type Thermal Insulation for Use Over Austenitic Stainless Steel.


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b. Cellular glass (Density 120 Kg/ m3 10%) in accordance with the

requirements of ASTM C552 Cellular Glass Block and Pipe Thermal

Insulation.

B. Metal Jackets

1. Metal jackets shall be aluminum except where specified at para. III.B.2.

Material grades/ thickness shall be as per clause 4.6 (1) of EXXON MOBIL

CHEMICAL GP 14-01-01.

2. Metal jacket shall be stainless steel when required as per para 4.6(2) of

EXXON MOBIL CHEMICAL GP 14-01-01.

3. Insulation jacket components of dissimilar metals subject to galvanic

corrosion shall not be brought into contact with each other.

C. Non Metallic jackets and coatings

Where specified, non metallic jackets/ coatings may be used for hot service. Refer

clause 4.7 of EXXON MOBIL CHEMICAL GP 14-01-01 for acceptable coating

materials.

Mastic for weatherproofing shall be a breathable asphalt, acrylic, or polyvinyl acetatetype. Mastic shall be weather and fire resistant and capable of withstanding 90C

surface temperatures.

D. Sealant for flashing applications shall be capable of withstanding operating

temperatures up to 150C.

Foster product 30-45 or equivalent is acceptable.

For higher temperatures, i.e. for the areas where the metal jacketing directly touches a

not insulated protrusion (nozzles, lifting lugs, pressure vessel supports, etc.), the

Contractor shall use an adequate mastic sealant suitable for these higher temperatures.

E. Accessory and attachment materials for thermal insulation shall be as per clause 5.5

of attached EXXON MOBIL CHEMICAL GP 14-01-01

1. Bands and seals for securing insulation and jacketing shall be of stainless

steel material.

2. Sheet metal screws and rivets shall be galvanized steel, stainless steel or

aluminium as specified. Screws shall be self tapping type.


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3. Welding studs, pins, and support clips shall be carbon steel for carbon and

low chromium steel vessels and austenitic stainless steel for austenitic steel

vessels.

F. On stainless steel and nonferrous piping or equipment the use of blankets with

galvanized netting is not allowed. For this application, use preformed sections,

blocks, slabs etc. without mesh.

G. All insulating materials shall be noncorrosive to the metal being covered.

IV. INSTALLATION

A. General

1. Equipment and piping surfaces shall be cleaned by brushing off all foreign

matter, such as dirt, loose rust, loose scale, plaster, etc., and shall be wiped

clean of oil and water to a dry condition before insulation is installed. Painted

surfaces shall be insulated only after paint has dried.

2. Insulation shall not be installed over joints (welds, flanges, pipe threads, etc.)

or tracers until required field testing has been completed and all such joints or

tracers are proven tight.

3. Insulation material shall not be stored in contact with the ground.

4. Insulation for pumps or turbines where required may be of the removable box

type. The fabricated box shall have the interior surface lined with resilient

type mineral fiber insulation.

5. Insulation shall be discontinued at flanged connections to permit removal of

the studs. The distance from the end of insulation to back of flange on both

sides of the connection shall be equal to one stud length plus 25 mm. The

ends of insulation shall be beveled at noninsulated flanges. At insulated

flanges, the ends of insulation shall be straight.

In both cases the ends of insulation shall be weatherproofed. Weatherproofing

for process temperatures up to 150C shall be sealant such as Foster 30-45 or

equal. For higher temperatures, aluminum or stainless steel flashing shall be

used.

6. Voids due to fittings of rigid insulation shall be filled with insulation

manufacturer specified elastometric caulking material suitable for use at the

intended temperature.


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7. Single-layer insulation shall be applied with longitudinal joints staggered. In

multiple-layer application, all joints of adjacent layers shall be staggered.

Adjacent insulation sections shall be butted firmly together.

8. Stiffening rings on equipment shall be covered with same insulation thickness

as the equipment itself.

9. Dry insulation material which becomes wet prior to or during installation

shall be thoroughly dried before proceeding with its installation.

10. Insulation material shall be held in place with bands, seals, expansion springsand clips etc. as per clause 5.5, 6.2 and 6.3 of EXXON MOBIL CHEMICAL

GP 14-01-01.

B. Weatherproofing

1. Metal jackets shall be installed in a manner to shed water and shall have a

minimum of 75 mm overlap for horizontal and circumferential seams. Where

jacket surfaces are cut to provide for protrusions, flashing shall be provided

and installed in a manner to keep water from entering behind the jacket.

Orange peel segments of head jackets shall be lapped 75 mm minimum and

shall be sealed with Foster 60-25 mastic or equal. This mastic seal shall also

be used for the vertical seals of all metal jackets (i.e., all longitudinal seams

on vertical piping and equipment and all circumferential seams on horizontalpiping and equipment).

2. Metal jackets shall be held in place with bands and/or self tapping screws as

specified in 5.5 and 6.8 of EXXON MOBIL CHEMICAL GP 14-01-01.

3. On vertical piping, vessels and equipment, "S" clips shall be used to keep

jacket sheets from sliding. "S" clips shall be spaced at 300 mm intervals, but

not less than two clips per sheet.

4. "J" clips shall be used to support the bands on vessels over 3 m in diameter.

The "J" clips shall be attached to the jackets with self-tapping screws and

shall be spaced about 1.8 m apart.

5. Screws shall be used on longitudinal joints and for securing flashing sheets to

provide weather-tight installations. Spacing of screws shall not exceed 150

mm.

6. Breather springs, corrugated bands and "S" clips shall be used to hold

jacketing in place on parts which operate at high temperature. Self tapping

screws may only be used where high thermal stresses are not likely to be

encountered.


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7. Jackets attachments shall be designed to hold the jackets in place for the

condition of maximum design (fastest mile) wind velocity.

8. Insulation Contractor shall temporarily protect insulation material against

wetting when it will remain exposed to the weather, for any lenght of time

and for any reason, before final jacketing protection is installed.

9. Vessel and machinery nameplates and code inspection plates shall not be

covered with insulation. Insulation shall be beveled away from such markings

and sealed against water entry.


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EXHIBIT "A"

INSULATION THICKNESS FOR HEAT CONSERVATION

INSULATION THICKNESS mm WITHIN OPERRATING TEMPERATURE RANGE C BELOWPIPE SIZE

(INCHES)20-60 61-100 101-150 151-200 201-250 251-300 301-350 351-430

25 25 25 50 50 50 65 65

25 25 40 50 50 65 65 75

1 25 40 40 50 50 65 75 75

1 25 40 40 50 65 75 75 75

2 40 40 50 65 65 75 75 75

3 40 40 50 65 75 90 90 90

4 40 40 50 75 90 90 90 90

6 40 40 50 75 90 90 90 100

8 40 50 65 75 90 100 115 115

10 50 50 65 90 90 100 115 125

12 50 50 65 90 90 100 115 125

14 50 50 65 90 100 100 115 125

16 50 50 65 90 100 100 115 125

18 50 50 65 90 100 100 115 125

20 50 50 65 90 100 100 115 125

24 50 50 65 90 100 100 115 125

Equipment 50 50 65 90 100 100 115 125

Flat Surfaces 50 50 65 90 100 100 115 125

NOTE:

1. The table provides insulation thickness for heat conservation based on Expanded

Perlite/Cellular Glass. The use of alternative insulation materials can be submmited

to Owners approval. Thermal conductivity at mean temperature should be within10% of the design thermal conductivity (Kdes) of insulation material the tables are

based on. If the thermal conductivity of a proposed insulation material deviates more

than 10% from the design thermal conductivity, insulation thickness shall be

calculated to provide equal or greater thermal resistance than that using the specified

thickness.

2. Insulation design should be based on avoiding corrosion under insulation. Insulation

details need owners approval.

3. Where flanges are insulated, they will have quick removal-insulation to facilitate

maintenance or process access.


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EXHIBIT "B"

I. INSULATION THICKNESS FOR PERSONNEL PROTECTION

INSULATION THICKNESS mm WITHIN OPERRATING TEMPERATURE RANGE C BELOWPIPE SIZE

(INCHES)5-149

(Note1)

150-200 201-250 251-300 301-350 351-400

- 25 40 40 40 50

- 25 40 40 50 501 - 40 40 40 50 50

1 - 40 40 40 50 50

2 - 40 50 50 50 65

3 - 40 50 50 50 65

4 - 40 50 50 50 65

6 - 40 50 50 50 65

8 - 40 50 50 65 75

10 - 40 50 50 65 75

12 - 40 50 65 75 75

14 - 40 50 65 75 90

16 - 40 50 65 75 90

18 - 40 50 65 75 90

20 - 40 50 65 75 90

24 - 40 50 65 75 90

Equipment - 40 50 65 75 90

Flat Surfaces - 40 50 65 75 90

NOTE:

1. Provide physical barriers such as caging, guards, shields or railing in lieu of thermal insulation

as per EBP 14-01-01. Also refer clause 4.4 of GP 14-01-01.

2. Thicknesses are based on Expande Perlite/Cellular Glass.

3. Where flanges are insulated, they will have quick removal-insulation to facilitate maintenance

or process access.

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