Pipe Hot Insulation Specification

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Document Title:

PIPE HOT INSULATION

SPECIFICATION

Document Number:

SP002 – B – 18 – PI – 000 – SPH - 022

A.H A.A M.B.B M.E A.T ISSUED FOR COMMENT

28/06/08 0 AUTHORIZE APPROVE APPROVE CHECK PREPARE STATUS / POI DATE REV. PROJECT DISCIPLINE

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TABULATION OF REVISED

1. SCOPE

This specification gives minimum requirements for the design, manufacture, testing, supply, commissioning, start-up performance testing of thermal insulation for hot temperature services for piping from ambient and above of the offsite Phase II and Interconnection project at Bandar ASSALUYEH, Iran.

Insulation is required to conserve heat of piping, to control process temperature (avoid condensation, solidification, or excessive viscosity of fluids and materials) and to provide personnel protection.

This specification does not cover the insulation for underground piping or buried equipment or Exterior insulation systems for surfaces with temperatures at or below the dew point (cold insulation systems).

2. DEFINITIONS

For the purpose of this specification, the following definitions shall apply:

OWNER: Petrochemical Industries Development Management (P.I.D.M.Co) is the Client.

CONCESSION REQUEST:

A deviation requested by the CONTRACTOR or

MANUFACTURER, usually after receiving the

contract package or purchase order. Often, it refers

to an authorization to use, repair, recondition,

reclaim, or release materials, components or

equipment already in progress or completely

manufactured but which does not meet or comply

with requirements of this specification. A

CONCESSION REQUEST is subject to OWNER

approval.

CONTRACTOR:

Contractor for Offsite Phase II and Interconnection

MANUFACTURER

:

The parties which manufacture and/or supply

CONTRACTOR with the insulation materials,

technical documents/drawings and services to perform

the duties specified by CONTRACTOR.

PROJECT:

Offsite Phase II and Interconnection

SHALL:

Indicates a mandatory requirement.

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SUBCONTRACTOR:

The party which carries out the installation, and testing

of the insulation as specified by the CONTRACTOR.

3. APPLICALBE CODES AND STANDARDS

3.1 General

The following codes and standards shall, to the extent specified herein, form a part of this specification. Where a specific edition date is not indicated, it shall be taken that the most current edition (including addenda) in effect at the time of SUBCONTRACTOR’S proposal or submittal shall apply.

3.2 List of Applicable Codes and Standards

The publications listed below form a part of this specification to the extent referenced. The publications are referred to, in the text, by the basis designations only.

American Society for Testing and Materials (ASTM)

ASTM A167 Stainless and heat-resisting chromium-nickel steel plate, sheet, and strip

ASTM A313M Stainless steel spring wire

ASTM A463 Steel sheet, cold rolled, aluminium-coated, type 1 and type 2

ASTM A480M Flat-rolled stainless steel and heat resisting steel plate, sheet, and strip

ASTM A525 General requirements for steel sheet, zinc-coated (galvanized) by the hot deep process

ASTM A580M Stainless steel wire

ASTM A653M Steel sheet, zinc-coated (galvanized) or zinc-iron alloy-coated (galvanized) by the hot-dip process

ASTM A924M General requirements for steel sheet, metallic coated by the hot dip process

ASTM B209M Aluminium-Alloy sheet and plate

ASTM C165 Measuring compressive properties of thermal insulations ASTM C167 Fiberglass material density

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the guarded hot plate

ASTM C195 Mineral fibre thermal insulating cement

ASTM C240 Foam glass density

ASTM C303 Density of performed block type thermal insulation ASTM C411 Test method for hot-surface performance of

high-temperature thermal insulation

ASTM C449 Mineral fibre hydraulic-setting thermal insulating and finishing cement

ASTM C518 Steady-state heat flux measurements and thermal transmission properties by means of the heat flow meter apparatus

ASTM C450 Prefabrication and field fabrication of thermal insulating fitting covers for NPS piping, vessel lagging, and dished-head segments.

ASTM C533 Calcium silicate block and pipe thermal insulation ASTM C547 Mineral fibre performed pipe insulation

ASTM C552 Cellular glass block and pipe thermal insulation

ASTM C585 Inner and outer diameters of rigid thermal insulation for nominal sizes of pipe and tubing (NPS System)

ASTM C592 Mineral fibre blanket insulation and blanket-type pipe insulation (metal-mesh covered) (industrial type)

ASTM C610 Molded expanded perlite block and pipe thermal insulation

ASTM C612 Specification for Fiber Block 2 and board for thermal insulation

ASTM C680 Determination of heat gain or loss and the surface temperature of insulated pipe and equipment systems by the use of a computer program

ASTM C692 Evaluating the influence of wicking type thermal insulationson external stress corrosion cracking tendency of austenitic stainless steel

ASTM C795 Thermal insulation for use in contact with austenitic stainless steel

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ASTM C871 Chemical analysis of thermal insulation materials for leach able chloride, fluoride, silicate, and sodium ions ASTM C892 High-Temperature Fiber Blanket Thermal Insulation ASTM C929 Handling, transporting, shipping, storage, receiving, and

application of thermal insulation materials for use in contact with austenitic stainless steel

ASTM C1086 Glass fibre felt thermal insulation

ASTM E84 Surface burning characteristics of building materials ASTM E162 Surface flammability of materials using a radiant heat

energy source

British Standard (BS)

BS 476 PART 4 Non-combustibility test for materials.

4. REFERENCE DOCUMENTS

In this publication reference is made to the publications listed below. The latest issue of each publication shall be used together with any amendments/supplements/revisions unless otherwise stated.

Project Specification

SP002-B-18-PI-000-SPH-023 Pipe Cold Insulation Specification SP002-B-18-PI-000-SPH-024 Pipe Painting Specification

SP002-B-18-PI-000-SPH-015 Standard Pipe Support Specification

5. DOCUMENT PRECEDENCE

It shall be the MANUFACTURER and SUBCONTRACTOR’S responsibility to be or to become, knowledgeable of the requirements of the referenced codes and standards.

The SUBCONTRACTOR shall notify the CONTRACTOR of any apparent conflict between this specification, product data sheets, the codes and standards, and any other specification or document noted herein. Resolution and/or interpretation precedence shall be obtained from the CONTRACTOR in writing before proceeding with application of any insulation material.

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6. RESPONSIBILITY

The SUBCONTRACTOR shall assume unique responsibility and overall guarantee for the installed insulation system.

7. SPECIFICAITON DEVIATION/CONCESSION CONTROL

Any technical deviation to the purchase order/contract and its attachment including, but not limited to, the data sheets and narrative specification shall be sought by the MANUFACTURER and SUBCONTRACTOR only through the CONCESSION REQUEST format. CONCESSION REQUESTS require the CONTRACTOR’s and the OWNER’s review and approval, prior to the proposed technical changes being implemented. Technical changes implemented prior to OWNER approval are subject to rejection.

8. QUALITY ASSURANCE/QUALITY CONTROL

The SUBCONTRACTOR shall have in effect at all times, a QA/QC program which already establishes the authority and responsibility of those responsible for the quality system. Persons performing quality functions shall have sufficient and well defined authority to enforce quality requirements that initiate, identify, recommend and provide solutions to quality problems and verify the effectiveness of the corrective action.

The SUBCONTRACTOR is solely responsible for all quality control activities and documentation. If the SUBCONTRACTOR is unable to comply with this specification, he shall inform the CONTRACTOR for resolution.

A copy of the SUBCONTRACTOR’S QA/QC program shall be submitted to the CONTRACTOR with its quotation for the CONTRACTOR’S review and approval prior to award.

The MANUFACTURER shall submit certified reports of production tests as soon as the tests are satisfactorily completed.

The OWNER/CONTRACTOR reserves the right to inspect materials and workmanship at all stages of manufacture and to witness any or all tests.

9. GENERAL DESIGN

9.1 Insulation Codes

Insulation requirements shall be identified using the following codes:

A Noise attenuation

H For heat conservation and process using the temperature control

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P For protecting personnel from surfaces above 65o_C

E Electric traced and insulated

B Solar protection

T Steam Traced and Insulated

AH Hot and acoustic insulation

J Jacketed lines

N Not insulated

9.2 Insulation type and thickness

The type and extent of insulation requirements shall be as specified on the P&Ids, Piping Line List and piping isometrics.

Hot insulation thickness shall be as per attached annexes. The following temperature shall be taking into account:

 Pipe: Shell or tube side operating temperature, inlet or outlet whichever is higher.  Heat tracer and steam-out temperature shall not be used to determine the

appropriate insulation thickness.

Insulation for personnel protection shall be installed only in accessible areas where the operating temperature of piping will exceed 65o_{C and will present a safety hazard because of}

location. Extent of personnel protection insulation shall not exceed 2 meters above nor more than 1 meter away from accessible areas. In general, pumps, valves, flanges, and unions shall not be insulated for personnel protection. If, however, surface temperature exceeds 65o_C,

insulation or other means of protection shall be provided to prevent personnel from coming in direct contact with hot surfaces.

9.3 Insulation Supports

Insulation supports for vertical piping or lines inclined more than 45o_{from horizontal}

supports shall be of a bolted or clamp-on type. The width of the support shall be one-half of the thickness of the insulation for single layer insulation. Support width for multiple layers of insulation shall be 15 mm less than the total insulation thickness. Insulation supports for vertical piping shall be provided and insulated by the SUBCONTRACTOR at the following locations:

 300mm above the uppermost weld of an elbow or tee in a vertical of piping  Bolt length plus 25 mm above vertical oriented flanges

 Every 3.5 meters of vertical carbon steel pipe elevation and every 2.75 meters of vertical stainless steel pipe elevation.

The SUBCONTRACTOR shall not weld supports to any item unless written authorization to do so is obtained from the OWNER.

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10. INSULATION AND ACCESSORY MATERIALS

Materials for insulation, fastening sand jacketing shall be selected from the materials described below, unless otherwise agreed by the OWNER/CONTRACTOR.

The amount of leachable chloride in the insulation material (except for calcium silicate) before application shall not exceed 10 mg/kg. The pH of all insulation materials shall be between 6 and 9 in the wet condition. For the chemical analysis of insulation materials see ASTM C 871.

No flammable materials shall be attached to the insulation. Insulation materials shall be free from asbestos.

All insulation materials shall be stored in moisture-proof containers. If the insulation becomes damp, moist, or wet it shall not be applied until inspected and approved by the OWNER. Sheets of metal jacket shall be kept dry to prevent staining. Mastics shall be stored in accordance with the MANUFACTURER’S recommended temperature and conditions.

10.1 Insulation Materials 10.1.1 Mineral Fiber

Mineral Fiber shall be manufactured from mineral substances such as rock processed from a molten state into fibrous form.

10.1.2 Mineral wool blankets

The insulation shall be in accordance with ASTM C 592, Class II, with the following amendments:

 The insulation shall be made of molten rock lightly bound. The minimum density shall be 100 kg/m3_.

 The insulation shall be suitable for use up to 600o_C.

 The thermal conductivity shall be maximum 0.065 W/m.K at 200o_C.

 The insulation shall have one side stitched with galvanized wire or glass yarn on to 0.3-0.9 mm galvanized wire mesh of 15, 20 or 25mm hexagonal pattern. On stainless piping aluminized steel or stainless steel wire mesh shall be applied using stainless steel wire.

10.1.3 Mineral wool preformed pipe sections

The insulation shall be in accordance with ASTM C 547, Class III, with the following amendments:

 The insulation shall consist of rock wool and shall be made rigid with an organic binder. The minimum density shall be 100 kg/m3.

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 The thermal conductivity shall be maximum 0.065 W/m K at 200o_C.

 The length of the insulation sections shall be 60 or 120 cm.  Insulation for piping up to 8” inclusive.

10.1.4 Mineral wool preformed boards/slabs

The insulation shall be accordance with ASTM C 612, Class IV, with the following amendments:

 The insulation shall consist of rock wool and shall be made rigid with an organic binder. The minimum density shall be 100 kg/m3_.

 The thermal conductivity shall be maximum 0.068 W/m.K at 200o_C.

10.2 Fastening Materials

Galvanized steel materials shall never be used for fastening insulation to stainless steel piping.

10.2.1 Binding wire

Wire shall be annealed type austenitic stainless steel (AISI 304) as follow:  For pipe 12” DIA and under:1.5 (mm)

 For pipe over 12”: 2 (mm)

10.2.2 Band

The band material for strapping bands and distance ring bands shall be minimum of 10mm to 20 mm wide stainless steel (AISI 304).

10.2.3 Self –tapping screws

Self-tapping screws shall be minimum 4.8 mm dia x 12mm long Monel, stainless steel or hard aluminium with slotted pan head or round head and have a neoprene washer under the head.

10.2.4 Rivets

Rivets for the securement of metal jacketing in locations where screws are impracricable, shall be stainless steel, Monel or hard aluminium and of the expanding type, having a minimum diameter of 5 mm.

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10.2.5 Clips and quick-release toggles

Clips and quick-release toggles shall be of stainless steel or aluminium. 10.2.6 Support rings

Support rings for metal sheeting shall be made of:

 1.5 x 25 mm stainless steel strip for an outside diameter of insulation up to 125mm.  3 x 25 mm stainless steel strip for an outside diameter of insulation above 125 mm

up to 760 mm.

 5 x 30 mm stainless steel strip for an outside diameter of insulation above 760 mm. 10.3 Metallic Jacketing

No flammable materials are allowed on the metal jacketing.

Aluminium is used over insulation of piping unless otherwise specified.

Galvanized sheeting shall not be used over insulation on or near austenitic stainless steel and/or austenitic nickel steel alloy piping and equipment. Galvanized sheeting is vulnerable to corrosion in costal and arid areas.

Aluminium jacketing shall be semi-hard quality meeting ASTM B 209M, alloy 3003, and temper H 16. Thickness shall be as follows:

 0.6mm for piping up to 6 in. (ND)  0.8mm for piping above 6 in. (ND)  1.0mm for removable boxes 10.4 Removable Insulation boxes

Insulation boxes fabricated of sheet metal with insulation installed inside the box shall be custom fabricated for use over flanges, flanged valves, pumps, and other irregular surfaces. The SUBCONTRACTOR shall submit the construction details to the OWNER for approval before initiation of fabrication. Insulation boxes shall comply with the following minimum requirements:

 The box shall have an integral metal flashing extending at least 50 mm on the adjacent pipe insulation.

 The boxes for valves shall cover the bonnet flange.

 The boxes shall be constructed with 1.0 mm thick metal sheet. The box shall have stainless steel latches and a metal identification tag.

 The insulation shall be of the same type and thickness as the adjacent pipe or equipment insulation. Insulation shall be installed in such a way so that no gaps

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exist at the joints when the box is closed. Up to 450o_{C, the insulation in the box}

shall be faced with a 0.19mm thick aluminium foil and secured with pins spaced on 230 mm centers.

10.5 Sheeting Sealants

For sealing joints in metal sheeting mastic sealants such as Foster 95-44 or equivalent shall be used.

10.6 Aluminum Foil

Aluminium foil to protect stainless steel surfaces shall be 0.19 mm thick.

11. GENERAL APPLICATION REQUIREMENTS

11.1 Material Supply

CONTRACTOR shall supply mineral wool (performed shells, mattresses and panels), aluminium jacketing and aluminium foil.

OWNER is responsible for supplying all ancillary materials such as mastic, wire, band, cramp, screw, rivets, quick release toggles, needles iron rods, etc.

11.2 General

Insulation materials shall not be applied if the moisture content is more than the stated amount given in the MANUFACTURER’S application data.

Surfaces to be insulated shall be clean, free of oil, grease, dirt, and moisture. All specified coatings shall be applied and allowed to cure before proceeding with the application of insulation materials.

11.3 Uninsulated surfaces

The following items shall not be insulated unless otherwise noted on the drawings or herein:  Code inspection plates

 Drains and vents

 Flanges and valves in hydrogen service  Internally insulated piping components  Name plates

 Stampings  Steam traps

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 Unions (except instrument line unions)  Strainers

 Gauges

 Manholes and nozzles in vessels

 Vessels having internal insulation shall not be insulated outside unless specified otherwise.

 Valves and fittings which require regular dismantling 11.4 Corrosion Prevention

Corrosion protection before applying insulation (all insulation material):

 Carbon steel and low alloy steel piping and equipment with normal operating temperature of 125o_{C and below shall be protected against corrosion by a primer}

coat of inorganic zinc silicate.

 All insulated austenitic stainless steel piping insulated with, rock wool shall be protected against chloride attack as follows:

 For operating temperature up to 450o_{C the surfaces shall be wrapped with 0.19mm}

thick aluminium foil with 50mm overlap at longitudinal and circumferential joints before application of insulation. All joints of aluminium foil shall have barium chromate primer interposed.

 Aluminium foil shall be firmly secured on the stainless steel surfaces by aluminium bands at a pitch of 500mm. Care shall be taken while applying aluminium foil to ensure that the foil is not punctured at any place during wrapping and clamping with aluminium bands.

 For operating temperature above 450o_{C the stainless steel surfaces shall be painted}

with coat of heat resistant silicon paint as follows:

Type : Single

Composition : Silicon resin based

Dry film thickness : 125 micron/coat and it should be suitable to withstand temperatures up to 800o_{C, when the paint becomes dry the painted surfaces}

shall show no discontinuity.

 Insulation shall be stopped short of uninsulated flange connections. The distance shall be the length of the flange bolt plus 25mm to allow removal of the bolts without damaging the adjacent insulation.

11.5 Pressure Testing Considerations

Vertical surfaces shall be insulated only after pressure testing.

Horizontal surfaces should be insulated after pressure testing. However, they may be insulated before pressure testing upon CONTRACTOR’S approval provided the insulation is

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temporarily held back a minimum distance of 150mm on either side of welds, threaded, or bolted connections. After completion of pressure testing, all missing insulation shall be installed and appropriately weatherproofed.

11.6 Valves and Flanges

Valves and flanges operating above 65o_{C and located in area that may cause a hazard for}

personnel, or in service, at any temperature where the product may solidify, shall be provided with removable insulation boxes. Valves and flanges in hydrogen service shall never be insulated.

12. INSULATION OF PIPING

12.1 Insulation Application

Single layer shall be as per Manufacturer’s range of availability for mineral wool but shall not exceed a maximum of 100mm.

Single layer pipe insulation shall be applied in a staggered circumferential joint arrangement. Multiple layer pipe insulation shall be applied with all joints, staggered the circumferential joints of multiple layer insulation systems shall be staggered 150mm from the circumferential joints of any adjacent preceding or succeeding layer.

Insulation shall be secured with bands (12.5 mm wide) up to 6” NPS, and with bands (15,9 mm wide) for sizes 8” NPS and above. Bands shall be spaced on 300mm maximum centers. Securement of fittings shall be as required to hold the insulation segments together tightly, but as a minimum each extreme shall be secured.

12.2 Pipe Expansion Joints

Bellows type pipe expansion joints shall be insulated with mineral fiber blanket insulation supplied with stainless steel wire mesh on each side of the insulation.

Pipe insulation shall terminate 150mm before the expansion bellows. Mineral fiber insulation shall be installed over the bellow’s protective cover and overlap the adjacent pipe insulation by a minimum of 225 mm on both sides. The mineral fiber insulation thickness shall be the same as the adjacent pipe insulation. The longitudinal joint shall be laced tightly with stainless steel wire so that no gaps exist. The insulation shall be secured in place with stainless steel bands positioned on either end of the insulated bellows.

Weatherproofing shall be applied over the insulated expansion joints bellows and shall be marked as follows:

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12.3 Weatherproofing Application

Jacket section shall be overlapped a minimum of 50 mm width, arranged to shed water, and located over the pipe side. Overlaps shall be staggered.

Pipe jacketing on mineral wool insulation shall be secured with screws spaced on 150mm maximum centers.

Metal jacketing over vertical pipe shall be supported on 100mm long S-clips. The minimum number of S-clips shall be two for pipe sizes up to and including 6” NPS, and four for sizes over 6” NPS.

The pipe fitting covers shall be tightly fastened with screws spaced on 75 mm maximum centers. Overlaps shall be 50mm width and arranged to shed water. Where it is impractical to maintain the 50 mm overlap, the overlapped jackets shall be secured together with screws spaced on 75mm centers.

A watertight metal termination cover shall be installed where pipe insulation terminates. Insulation at each termination shall be “square cut. Band clips shall be equally spaced with one clip at the overlap. Termination covers shall be with a band at each circumferential overlap and sheet metal screws spaced on 75mm centers.

Flashing compound shall be applied at all possible sources of moisture penetration.

Sheet metal screws for fastening the metal weatherproofing shall have a neoprene washer under its head.

13. INSPECTION

13.1 Inspection Schedule

The insulation system shall be inspected during the following stages:  At the time of material receipt

 Before applying the insulation  During insulation application

 Before and during application of weatherproofing 13.2 Materials Checking

Quality control activities shall include at least the following activities at the time of receipt of the materials:

Appropriate checks shall be made to verify materials received at the site are the same as the specified or approved materials. Such checks shall include verification of labels, material safety data sheets, delivery receipts, and thickness. Damaged, unspecified, or, unapproved, insulation and related materials shall be removed from the site.

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Ensure that storage of materials will protect them from being damaged by moisture, temperature, wind or any other atmospheric factors.

13.3 Inspection Prior to Insulation

Quality control activities shall include at least the followings prior to insulation application: If the pipe to be insulated is heat treated, inform the SUBCONTRACTOR that welding of insulation supports is prohibited without prior written approval from the OWNER.

Verify that pressure tests have been completed.

Verify that surfaces to be insulated are clean, dry, and coated as required by Project Specification "SP002-B-18-PI-000-SPH-024" Pipe Painting Specification

Verify that painting at protrusions through insulation has been done.

Ensure that protective coatings, over stainless steel surfaces to prevent external stress corrosion cracking, have been applied.

13.4 Inspection During Insulation

Quality control activities shall include at least the following during insulation application: Make sufficient checks to verify that the materials applied are the same as the specified or approved ones.

Verify the insulated item, and insulation code is the same as given on the P & ID’s and related drawings.

Inspect the insulation supports for correct location, type, width, and length. Verify that the insulation surface is uniform without gaps and voids. Inspect for tightness of joints and fasteners.

Verify the location, width, and installation of expansion joints. 13.5 Other Inspections

Quality control activities shall include at least the following prior to and during weatherproofing:

Ensure that the insulation is clean, dry, and fit for its intended purpose before weatherproofing is applied.

Inspect for proper overlaps of metal and flashing.

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Ensure that moisture protection and weatherproofing at cutouts, protrusions, and locations where moisture could enter the insulation have been appropriately installed.

14. SAFETY ASPECTS

The MANUFACTURER shall provide the CONTRACTOR with appropriate information regarding any hazards associated with the use of his materials and shall recommend the protective measures to be taken for their safe installation and use.

The SUBCONTRACTOR shall take appropriate preventive measures and precautions to reduce personnel exposure to mineral fiber and crystalline silica dust. The CONTRACTOR shall approve these measures. Care shall be taken, when applying insulation, to avoid tripping-off switches.

15. HANDLING AND STORAGE

15.1 Packaging and Shipping

MANUFACTURER shall be solely responsible for the adequacy of the preparation for shipment provisions with respect to materials and application, and to provide equipment at the destination in ex-works condition when handled by commercial carriers.

Adequate protection shall be provided to prevent physical damage and atmospheric damage to insulation or weatherproofing materials in transit and at the jobsite.

Preparation for shipment and packing will be subject to inspection and rejection by the OWNER’S/CONTRACTOR’s inspectors/SUBCONTRACTOR. All costs occasioned by such rejection shall be to the account of the MANUFACTURER.

15.2 Preservation and Storage

Insulation materials shall be protected to withstand ocean transit and extended periods of storage at the jobsite for a minimum period of 2 years. Materials shall be protected to safeguard against all adverse environments, such as: humidity, moisture, rain, dust, dirt, sand, mud, salt air, salt spray, and seawater.

The SUBCONTRACTOR is responsible for proper materials storage at the work site, in accordance with the MANUFACTURER’S instructions.

16. DOCUMENTATION

MANUFACTURER and SUBCONTRACTOR shall submit the type and quantity of drawings material safety data sheets and other documentation for CONTRACTOR’S authorization or information as listed in the individual Material Requisitions and Purchase Orders.

Mutual agreement on scheduled submittal of drawings and engineering data shall be an integral part of any formal Purchase Order.

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Comments made by CONTRACTOR on drawing submittals shall not relieve MANUFACTURER and SUBCONTRACTOR of any responsibility in meeting the requirements of the specifications. Such comments shall not be construed as permission to deviate from requirements of the Purchase Order unless specific and mutual agreement is reached and confirmed in writing.

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ANNEXES

TABLE 1- Insulation thickness in mm- Heat conservation, To <601o_C

Pipe Diameter _{Hot face temperature (}o_C) (nps) inch (outside)mm Up to50 51 to100 101to 150 151 to 200 201 to 300 251 to 300 301 to 350 351 to 400 401 to 450 451 to 500 501 to 551 551 to 600 sh el l 1/4" 13.7 30 30 30 30 40 40 40 50 50 50 60 60 ½ 21.3 30 30 30 40 40 40 50 50 60 60 60 70 ¾” 26.7 30 30 30 40 40 50 50 50 60 60 70 70 “1 33.4 30 30 40 40 40 50 50 60 60 70 70 80 “1½ 48.3 30 30 40 40 50 50 60 60 70 70 80 80 “2 60.3 30 30 40 40 50 50 60 60 70 70 80 90 “3 88.9 30 40 40 50 50 60 60 70 70 80 90 90 “4 114.3 30 40 40 50 60 60 70 70 80 80 90 100 “6 168.3 30 40 50 50 60 60 70 80 80 90 100 110 “8 219.1 30 40 50 50 60 70 70 80 90 90 100 110 M at “10 273.1 30 40 50 60 60 70 80 80 90 100 110 110 “12 323.9 30 40 50 60 60 70 80 80 90 100 110 120 “14 355.6 30 40 50 60 60 70 80 80 90 100 110 120 “16 406.4 30 40 50 60 70 70 80 90 90 100 110 120 “18 457.2 30 40 50 60 70 70 80 90 100 100 110 120 “20 508.0 30 40 50 60 70 70 80 90 100 110 120 130 “24 609.6 30 40 50 60 70 70 80 90 100 110 120 130 “30 762.0 30 40 50 60 70 80 80 90 100 110 120 130 “34 863.6 30 40 50 60 70 80 80 90 100 110 120 130 “36 914.4 30 40 50 60 70 80 80 90 100 110 120 130 “40 1016.0 30 40 50 60 70 80 80 90 100 110 120 140 “42 1066.8 30 40 50 60 70 80 90 90 100 110 120 140 “>42 30 40 50 60 70 80 90 100 110 120 130 150

Layering 1 Layer 2 Layers

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Pipe Diameter Hot face temperature (o_C) (nps) inch (outside)mm Upto 100 101 to 1500 151 to 200 201 to 250 251 to 300 301 to 350 351 to 400 401 to 450 451 to 500 501 to 550 551 to 600 S h el l “¼ 13.7 30 30 30 30 30 30 30 30 30 40 40 “½ 21.3 30 30 30 30 30 30 30 30 40 40 50 “¾ 26.7 30 30 30 30 30 30 30 30 40 40 50 “1 33.4 30 30 30 30 30 30 30 40 40 50 50 ½“1 48.3 30 30 30 30 30 30 30 40 50 50 60 “2 60.3 30 30 30 30 30 30 40 40 50 60 60 “3 88.9 30 30 30 30 30 30 40 50 50 60 70 “4 114.3 30 30 30 30 30 30 40 50 60 70 80 “6 168.3 30 30 30 30 30 40 50 60 70 80 90 “8 219.1 30 30 30 30 30 40 50 60 70 80 90 M at “10 273.1 30 30 30 30 30 40 50 60 70 80 100 “12 323.9 30 30 30 30 40 40 50 60 70 90 100 “14 355.6 30 30 30 30 40 40 50 60 80 90 100 “16 406.4 30 30 30 30 40 50 60 70 80 90 110 “18 457.2 30 30 30 30 40 50 60 70 80 90 110 “20 508.0 30 30 30 30 40 50 60 70 80 90 110 “24 609.6 30 30 30 30 40 50 60 70 80 100 110 “30 762.0 30 30 30 30 40 50 60 70 90 100 120 “34 863.6 30 30 30 30 40 50 60 80 90 100 120 “36 914.4 30 30 30 30 40 50 60 80 90 100 120 “40 1016.0 30 30 30 30 40 50 60 80 90 110 120 “42 1066.8 30 30 30 30 40 50 60 80 90 110 120 “>42 30 30 30 30 40 50 60 80 90 110 130

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TABLE 3- Multi-layer schedule (for thermal insulation)

In cases where the minimum required insulation thickness is higher than the available, insulation thickness more than one layer should be used, For this purpose the following table is guide line for selecting multi-layer system.

Required Thickness of Insulation (mm) Inner Layer Thickness Middle Layer Thickness (mm) Outer Layer (s) Thickness (mm) 40 40 none none 50 50 none none 65 65 none none 75 75 none none 90 90 none none 100 100 none none 110 50 none 60 120 60 none 60 130 65 65

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DETAILED SKETCHES

FIG1- Sheeting Details Pipe Insulation FIG2- Expansion Joint for Pipe Sheeting FIG3- Details Rain Cap at Supports

FIG4- Detail Elbow Segment (Long Radius) 3” and Above FIG5- Bends R>1.5 D

FIG6- Sheeting Details for Fittings FIG7- Enclosures Valves 11/2” & Smaller

FIG8- Flanged Valves& Control Valves Enclosures FIG9- End Caps for Flange and Valve Enclosures FIG10- Pump Insulation Details

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Fig 3 – Details Rain Cap at Supports

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Pipe Hot Insulation Specification