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WSA/D301 Rev E/2003 15090/1 Thermal Insulation

SECTION 15090THERMAL INSULATION

REVISION HISTORY

E 06.04.03 Clause 2.2.39 amendedRichardSmith

SteveKing

RichardSmith

D 24.08.02 WSA Standards RichardSmith SteveKing RichardSmith

C 08.07.02 Aluzink Sheeting Protection clause addedRichardSmith

SteveKing

RichardSmith

B 06.02.02 Review comments incorporatedRichardSmith

SteveKing

RichardSmith

A 02.01.02 General RevisionsRichardSmith

SteveKing

RichardSmith

0 22.12.01 WSA StandardRichardSmith

SteveKing

RichardSmith

Rev Date Description Prepared

by

Checked

by

Authorised

by

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1 GENERAL

1.1 SECTION INCLUDES

1.1.1 Include the General Conditions of the Contract as part of this section.

1.1.2 The Contractor shall become familiar with other sections of the Specifications affecting workof this trade.

1.1.3 Furnish all labour, materials, plant, equipment and appliances and perform all necessaryoperations required to execute the work of this section.

1.1.4 This section describes the requirements for thermal insulation of mechanical building services.

1.2 RELATED SECTIONS

1.2.1 This schedule is intended to be used as a helpful indication of the related sections within theProject Specifications. It is not necessarily comprehensive or complete and it is theContractor's responsibility to ascertain all applicable sections required to understand the fullScope of Works intended. 15105 Pipeline Accessories 15150 Pressure Pipelines

15485 HWS Cylinder 15815 Ductwork and Accessories

1.3 REFERENCES

1.3.1 The minimum standards for products specified in this section shall be those standards referredto or relevant BSI standards.

1.4 SUBMITTALS FOR REVIEW

1.4.1 Section 01300 - Submittals.

1.4.2 Submit samples, specifications, engineering calculations, catalogue cut sheets, description ofproduct and installation method in accordance with the Contract Documents. Submissionsshall indicate all dimensions, details of construction, details of installation, relation andconnections with adjoining work.

1.4.3 Submit copies of test reports required to be performed on the proposed products.

1.5 QUALITY ASSURANCE

1.5.1 Perform Work in accordance with relevant British Standards and industry standard codes.

1.5.2 INSPECTION AND TESTING: Arrange performance test of thermal conductivity on materials selected, carried out at

manufacturer's works or at an approved laboratory and in accordance with appropriateBritish Standard.

1.6 QUALIFICATIONS

1.6.1 Site operatives who apply thermal insulation shall be trained insulators who have passed aContractors trade test.

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1.7 MOCK-UP

1.7.1 At the commencement of the works a pipework and ductwork insulation, mock up shall beprovided by the Contractor and approved by the Engineer. This mock up will then be used asa quality control sample for the duration of the Works.

1.8 ENVIRONMENTAL REQUIREMENTS

1.8.1 TEMPERATURE RANGE: Surface temperature within range -40oC to 230oC

1.8.2 Suitable for application in an open building and before air-conditioning is activated in ambienttemperatures of up to 50 deg C and very humid condition such as 32C, saturated.

1.8.3 Suitable for application is a dusty environment.

1.9 WARRANTY

1.9.1 Section 01740 - Warranties and Bonds.

2 PRODUCTS

2.1 APPROVED MANUFACTURER OR PRODUCT

2.1.1 No particular requirements

2.2 PRODUCT REQUIREMENTS

2.2.1 STANDARDS: Comply in general with BS 5422 and the British Standards publications referred to

therein. Also comply with BS 5970. Description of terms as BS 3533.

2.2.2 MATERIALS: Employ materials that comply with BS 476 Part 4, non- combustibility test, or obtain a

Class `O' fire rating to Building Regulations when tested to BS 476 Parts 6 and 7. Ensure metals and materials that cause galvanic corrosion are not installed in contact. Do not use galvanised or zinc coated steel jacketing and accessories on austenitic

stainless steel and austenitic nickel steel/alloy equipment and piping.

2.2.3 CFC'S AND HCFC'S: Ensure all pipe and duct insulation materials and insulated pipe and duct supports are

free of CFC's. Ensure all sheet and slab materials are CFC and HCFC free.

2.2.4 CONTROL OF FIBRE MIGRATION: Ensure all manmade fibrous and mineral wool type materials are fully wrapped with foil

cover and sealed with tape to stop fibre migration.

2.2.5 SPREAD OF FLAME: When completed, ensure surface-finish complies with BS 476 Part 7 Class 1 spread of

flame.

2.2.6 SMOKE EMISSION CHARACTERISTICS: Supply materials classified as less than 5% smoke obscuration rating when tested in

accordance with BS EN ISO 5659-2.

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2.2.7 PRE-INSULATED EQUIPMENT: Where fire and surface spread of flame certificates relate to factory made products,

ensure that certificates are still valid where products are incorporated in pre-insulatedequipment.

2.2.8 PROTECTION APPLIED IN SITU:

Where fire and surface spread of flame certificates relate to factory made products,ensure that the certificate remains valid when the finish is site applied.

2.2.9 ELECTRICAL BONDING TERMINAL: Ensure an electrical bonding terminal suitable for connection of 6 mm2 maximum

conductor is provided where required.

2.2.10 THERMAL CONDUCTIVITY:

Ensure values are in accordance with BS 874 and BS 2972.

2.2.11 RESTRICTIONS ON USE OF MATERIALS:

Do not install insulants with man made or mineral fibres in food preparation areas oraseptic areas.

Protect insulated stainless steel surfaces from the risk of stress corrosion in accordancewith the recommendations in BS 5970.2030A

2.2.12 FOIL FACED MINERAL FIBRE PIPE INSULATION: Standard - BS 3958 Part 4. Nominal density - 80 kg/m3 to 120 kg/m3. Thickness - 20mm to 100mm.

- Thermal conductivity - Not exceeding 0.038 W/mK at a mean temperature of 50oC.

- Finish - Reinforced aluminium foil with at least 25mm overlap.

2.2.13 FOIL FACED MINERAL FIBRE RIGID DUCT INSULATION: Standard - BS 3958 Part 5. Nominal density - 45 - 48 kg/m3. Thickness - 25mm to 100mm.

Thermal conductivity - Not exceeding 0.04 W/mK at a mean temperature of 50oC. Finish - Reinforced aluminium foil.

2.2.14 FOIL FACED MINERAL FIBRE FLEXIBLE DUCT INSULATION: Nominal density - 28 kg/m3 to 45 kg/m3. Thickness - 25mm to 60mm.

Thermal conductivity - Not exceeding 0.04 W/mK at a mean temperature of 50oC. Finish - Reinforced aluminium foil.

2.2.15 GALVANIZED METAL MESH ON MINERAL FIBRE MATTRESSES - ONE FACE: Standard - BS 3958 Part 3.

Nominal density - 90 - 128 kg/m3. Thickness - 25mm to 100mm. Thermal conductivity - Not exceeding 0.038 W/mK at a mean temperature of 50oC. Mesh - Galvanized. Faced, one side.

2.2.16 FLAT DUCTWORK FIRE PROTECTION INSULATION - MITRED JOINTS: Material - Mineral fibre, slab for flat ducts, with 45o mitred joints. Nominal density - 165 kg/m3.

Thermal conductivity - Not exceeding 0.035 W/mK at a mean temperature of 10oC.

Facing - Reinforced aluminium foil with galvanised wire melting.

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2.2.17 CIRCULAR DUCTWORK FIRE PROTECTION INSULATION - SECTION: Material - Mineral fibre

- Section for circular duct, 100 to 610 mm diameter. Nominal density - 165 kg/m3. Thermal conductivity - Not exceeding 0.035 W/mK at a mean temperature of 10oC. Facing - Reinforced aluminium foil with galvanised wire netting.

2.2.18 CIRCULAR DUCTWORK FIRE PROTECTION INSULATION - PSM: Material - Mineral fibre

- PSM for circular duct greater than 406mm diameter. Nominal density - 165 kg/m3. Thermal conductivity - Not exceeding 0.035 W/mK at a mean temperature of 10oC. Facing - Reinforced aluminium foil with galvanised wire netting.

2.2.19 FOIL FACED CLOSED CELL RIGID PHENOLIC FOAM (PF) PREFORMED SECTIONS - CFCFREE: Standard - BS 3927. Nominal density - 35 - 40 kg/m3.

Temperature range - -180 to +120

o

C. Thickness - 15mm to 50mm. Thermal conductivity - Not exceeding 0.018 W/mK at a mean temperature of 10oC. Finish - Reinforced aluminium foil.

2.2.20 CLOSED CELL RIGID LAMINATED PHENOLIC FOAM (PF), DUCT INSULATION SLAB - CFCAND HCFC FREE:

Standard - BS 3927. Nominal density - 40 kg/m3. Thickness - 20mm to 50mm. Thermal conductivity - Not exceeding 0.020 W/mK at a mean temperature of 10oC.

2.2.21 HIGH DENSITY PHENOLIC PIPE AND DUCT SUPPORT FOAM - CFC FREE: Standard - BS 3927. Nominal density - 80 kg/m3 to 120 kg/m3.

Temperature range - -180 to +120oC. Thermal conductivity - Not exceeding 0.040 W/mK at a mean temperature of 50oC.

2.2.22 CLOSED CELL NITRILE RUBBER ELASTOMERIC SHEET AND PREFORMED FLEXIBLESECTIONS: Nominal density - 90 - 100 kg/m3.

Temperature range - -40 to +105oC. Thickness

- Sections - 13mm to 25mm for pipe sizes 15mm to 100mm.- Sheets - 6mm to 25mm.

Thermal conductivity - Not exceeding 0.04 W/mK at a mean temperature of 20oC.

2.2.23 VAPOUR BARRIER PERMEANCE: Do not exceed the following permeance values for vapour barriers. Permeance values

- Cold water pipework - 0.05g/sMN.- Chilled water pipework - 0.015g/sMN.- Refrigeration pipework - 0.010g/sMN.- Ductwork - 0.015g/sMN.

2.2.24 VINYL VAPOUR BARRIER COATINGS: Vinyl emulsions with open mesh glass cloth to reinforce coatings.

2.2.25 SOLVENT POLYMER VAPOUR BARRIER COATINGS: Solvent-based polymers with open mesh glass cloth to reinforce coatings.

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2.2.26 ADHESIVES: Comply with the recommendations of clause 8.2 of BS 5970 section 2 for insulation

bonding adhesives; lagging adhesives; facing and film attachment adhesives.

2.2.27 POLYISOBUTYLENE PROTECTION: Minimum thickness 0.8mm.

2.2.28 ALUMINIUM SHEETING PROTECTION: Apply flat (embossed) or profiled aluminium cladding directly to insulating material.

0.56mm thick on pipework; O.71mm thick on ductwork.

2.2.29 RIGID PVC PROTECTION:

0.35mm thick.

2.2.30 WIRE NETTING REINFORCEMENT: 50mm x 19g galvanised wire netting.

2.2.31 VALVE AND FLANGE INSULATION - ALUMINIUM CASING: Install insulation on flanges and valves, where indicated.

Use a protected metal split casing fabricated from 0.91mm aluminium sheet fitted withspring clip fasteners, filled with insulating material with same thermal performance asinsulation on adjoining pipe.

2.2.32 CLOSED CELL VALVE AND FLANGE INSULATION - COLD APPLICATIONS: Install insulation on flanges and valves, where cold liquid is below 20C. Enclose cold piping valve bodies and flanges with closed cell insulating material to

maintain vapour barrier.

2.2.33 VALVE AND FLANGE INSULATION - COLD APPLICATIONS: Install insulation on flanges and valves, where cold liquid is below 20C. Enclose cold piping valve bodies and flanges with insulating material to maintain vapour

barrier.

2.2.34 ALUMINIUM PROTECTION FOR HEAT EXCHANGERS AND OTHER VESSELS - WITH CHESTAND ACCESS COVERS: Finish with 0.9mm thick aluminium ribbed or embossed sheeting, with lapped, riveted

and sealed joints, laps to shed water. Seal all joints at manholes and stools. Fit cut outswith purpose made over-plates or collars.

Enclose chests and access covers in removable covers lined with high density flexiblematerial. Remove manufacturer's name plate and refix on cladding.

2.2.35 PRE-INSULATED BOILER FLUES: Provide pre-insulated boiler flues as indicated.

2.2.36 PUMPS AND OTHER IRREGULAR SHAPES: Where access is required to pumps and other irregular shapes submit proposals for

materials and methods of applying

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2.2.37 HEATING SYSTEMS THICKNESS TABLE - MINERAL WOOL INSULATION:

----------------------------------------------------Fuel

Pipe Gas Oil SolidFuel

size Water temperature 75oC----------------------------------------------------(mm) Thickness of mineral wool insulation (mm)----------------------------------------------------15 20 20 20

20 20 25 2025 25 25 2032 25 25 2040 25 25 2050 25 25 2065 25 30 2080 25 30 20

100 30 30 25125 30 30 25150 30 30 25

200 30 30 25250 30 30 25Flat Surfaces 30 30 25

----------------------------------------------------Fuel


size Water temperature 100oC-------------------------------------------------------

mm Thickness of mineral wool insulation (mm)----------------------------------------------------15 25 25 2020 25 25 2025 25 30 2532 25 30 2540 30 30 2550 30 30 2565 30 30 2580 30 30 25100 30 30 25

125 30 40 30150 30 40 30200 40 40 30250 40 40 30300 40 35 30350 40 35 30400 50 35 30450 50 40 35500 50 40 35Flat Surfaces 40 40 30

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----------------------------------------------------Fuel


size Water temperature 150oC-------------------------------------------------------

mm Thickness of mineral wool insulation (mm)-------------------------------------------------------15 30 30 2520 30 30 2525 30 30 25

32 30 40 3040 30 40 3050 40 40 3065 40 40 3080 40 40 30100 40 40 30125 40 50 30

150 40 50 40200 50 50 40250 50 50 40

Flat Surfaces 50 50 40

2.2.38 HEATING SYSTEMS THICKNESS TABLE - PHENOLIC FOAM INSULATION:----------------------------------------------------Pipe Fuel Gas Oil Solid fuelsize Water temperature 75oC----------------------------------------------------mm Thickness of phenolic foam (mm)----------------------------------------------------15 20 20 20

20 20 20 2025 20 20 2032 20 20 2040 20 20 2050 20 20 2065 20 20 2080 20 20 20100 20 20 20125 20 25 20150 20 25 20200 20 25 20

250 25 25 20Flat Surfaces 30 30 20

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----------------------------------------------------Pipe Fuel Gas Oil Solid fuelsize Water temperature 100oC----------------------------------------------------mm Thickness of phenolic foam (mm)----------------------------------------------------

15 20 20 2020 20 20 2025 20 20 2032 20 20 2040 20 20 20

50 20 25 2065 25 25 2080 25 25 20100 25 25 20125 25 25 20150 25 25 20200 25 25 20

250 25 35 25Flat Surfaces 30 35 30

2.2.39 CHILLED AND MAINS COLD WATER SUPPLIES THICKNESS TABLE - PHENOLIC FOAMINSULATION:

----------------------------------------------------Pipe Temperature of contents oCsize 0 5 10----------------------------------------------------mm Thickness of phenolic foam (mm)----------------------------------------------------15 20 20 2020 20 20 20

25 20 20 2032 25 20 2040 25 20 2050 25 20 2065 25 20 2080 30 20 20100 30 20 20125 30 25 20150 30 25 20200 35 30 25250 35 30 25

Flat Surfaces40 30 25

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2.3 DUCTWORK INSULATION THICKNESS

2.3.1 MINIMUM THICKNESS OF INSULATION FOR DUCTWORK CONVEYING WARMED OR CHILLEDAIR

Maximum

TemperatureDifference (K),between Air inDuctwork andAmbient Air

10 25 50

ThermalConductivity

W/m K

0.21 0.041up to to to

0.020 0.040 0.055

0.021 0.041up to to to

0.020 0.040 0.055

0.21 0.041up to to to

0.020 0.0400.055

Minimum

Thickness mm

25 38 50 30 50 50 40 63 75

2.3.2 ALUZINK SHEETING PROTECTION Apply flat (embossed) as profiled Aluzink cladding directly to insulating material 0.4mm on

pipework and 0.4mm on ductwork.

Aluzink shall be as manufactured by Dobelshield Ltd 0044 (0) 1384 74660/[email protected]

2.3.3 ALUZINK PROTECTION FOR HEAT EXCHANGERS AND OTHER VESSELS - WITH CHEST ANDACCESS COVERS: Finish with 0.6mm thick aluzink protection ribbed or embossed sheeting, with lapped,

riveted and sealed joints, laps to shed water. Seal all joints at manholes and stools. Fitcut outs with purpose made over-plates or collars. Enclose chests and access covers in removable covers lined with high-density flexible

material. Remove manufacturers name plate and refix on cladding.

3 EXECUTION

3.1 EXAMINATION

3.1.1 Verify site conditions under provisions of Section 01400.

3.1.2 Before ordering any materials / commencing work verify that building structure associatedwith the system is within tolerance and take full account of shape configuration and materialproperties of the structure.

3.2 PREPARATION

3.2.1 Refer to 3.5

3.3 HANDLING AND STORAGE

3.3.1 Deliver component parts to site, completely identified in accordance with shop and certified

drawings prepared for this work. Store in accordance with manufacturer's instructions, aboveground, properly protected from the weather and construction activities.

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3.4 FABRICATION

3.4.1 All aluminium cladding shall be fabricated in a purpose constructed fabricator shop.

3.5 INSTALLATION

3.5.1 PIPE INSTALLATION INSPECTIONBefore beginning installation in any area, examine all parts of the adjoining work into whichapplicable work is to be placed. Should any conditions be found which will prevent the properexecution of the work, installation shall not proceed in that area until such conditions arecorrected by the contractor.

3.5.2 GENERAL: Carry out thermal insulation work using skilled craftsmen conversant with class of work. Do not apply thermal insulation until installation has been fully tested and all joints proved

sound. Ensure all materials are kept dry. Insulate each unit separately. Do not enclose adjacent units together.

Ensure there is clearance between insulated pipes. Application - Apply insulants, facings, coatings and protection strictly in accordance with

manufacturer's instructions. Finish - Neatly finish joints, corners, edges and overlaps and, where possible, arrange

overlaps to fall on blind side. Ensure overlaps are neat and even and parallel tocircumferential and longitudinal joints.

3.5.3 INSTALLATION OF FOIL FACED MINERAL WOOL INSULATION ON PIPEWORK: Ensure joints are close butted together. Secure overlaps with adhesive or matching class

Ò' tape, a minimum of 50mm wide, on both longitudinal and circumferential butt joints.Insulate fittings to same standard as adjacent pipework and use mitred segments wherenecessary, taped as above.

Where a vapour seal or fibre containment is required tape exposed insulation membraneand return to pipe surface.

Where insulation abutts pipe support inserts that have integral vapour barriers seal using

classÒ' foil tape to continue vapour barrier or containment.

3.5.4 INSTALLATION OF FOIL FACED PHENOLIC FOAM INSULATION ON PIPEWORK: Ensure joints are close butted together. Secure overlaps with adhesive or matching class

Ò' tape, a minimum of 50mm wide, on both longitudinal and circumferential butt joints.Insulate fittings to same standard as adjacent pipework and use mitred segments wherenecessary, taped as above.

3.5.5 INSTALLATION OF INSULATION ON PIPEWORK - WITH CANVAS FINISH: Ensure joints are well butted together. Insulate bends with mitred segments of

insulation. Insulate fittings to same standard as adjacent pipework. Ensure longitudinaland circumferential canvas overlaps are stuck with adhesive and smoothed out. Applytwo coats of heat-resisting paint.

3.5.6 INSTALLATION OF INSULATION ON PIPEWORK - WITH SHEET METAL FINISH: Secure insulation with metal bands at each end of section and at maximum centres of

450mm. Ensure joints are close butted together. Insulate bends with mitred segments ofinsulation banded into position. Insulate fittings to same standard as adjacent pipework.Form sheet metal to fit tightly over the outer circumference of insulation with alongitudinal overlap of at least 40mm. Secure the outer part of overlap with self tappingscrews or rivets at centres of not more than 150mm except on pipes with vapourbarrier; or metal bands.

Ensure circumferential overlaps are at least 50mm, secured with self tapping screws orrivets. Make provision to accommodate expansion and contraction at intervals. Ensure alljoints are lapped to shed liquids and seal all joints exposed to weather or spillage. Cover

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all bends and fittings with matching sheet metal, tailored to fit and sealed asappropriate. Fit pre-insulated, purpose-designed boxes to valves, flanges, etc.

On cold pipes ensure that the vapour barrier is not punctured by rivets, self tapping screwor any other means.

3.5.7 INSTALLATION OF CLOSED CELL NITRILE RUBBER INSULATION ON PIPEWORK:

Install closed cell nitrile rubber in accordance with manufacturers recommendations.

3.5.8 INSTALLATION OF FOIL FACED SEMI-RIGID SLAB INSULATION ON DUCTWORK: Secure the insulation with adhesive in accordance with manufacturer's recommendations.

Use insulation hangers spaced at maximum 300mm centres on the underside of ducts. Cut slabs so that the top and bottom pieces overlap the sides. Seal joints and pin

penetrations using 100mm wide class Ò' aluminium foil tape. Where cut outs for testholes, etc occur tape over insulation membrane and return to the duct surface.

Where insulation abutts duct support inserts that have integral vapour barriers seal using

classÒ' foil tape to continue vapour barrier.

3.5.9 INSTALLATION OF FOIL FACED FLEXIBLE DUCTWORK INSULATION:

Secure the insulation with adhesive in accordance with manufacturer's recommendations.Use insulation hangers spaced at maximum 300mm centres on the underside ofrectangular and flat oval ducts.

Seal joints and pin penetrations using 100mm wide class Ò' aluminium foil tape. Where

cut outs for test holes, etc occur tape over insulation membrane and return to the ductsurface.

Where insulation abutts duct support inserts that have integral vapour barriers seal usingclassÒ' foil tape to continue vapour barrier.

3.5.10 INSTALLATION OF INSULATION ON TANKS: Fit insulation so that two opposite pieces overlap the sides. Bond insulation to the tank

with adhesive, applied in accordance with the manufacturer's recommendations. Closelybutt together all slabs and seal joints with a matching self-adhesive tape 100mm wide.

3.5.11 INSTALLATION OF MINERAL WOOL INSULATION ON VESSELS: Cut Lamella to length to wrap around duct with an additional 75mm to form an overlap.

Remove insulation from facing of overlap together with dust, and seal overlap with

adhesive in accordance with manufacturer's instructions. Butt joints closely together andseal with matching self-adhesive tape at least 100mm wide.

3.5.12 INSTALLATION OF PHENOLIC FOAM INSULATION ON VESSELS: Use pre-formed segments or pre-slotted foil faced insulation to fit the diameter of the

vessel, laid with staggered joints. Vapour seal the joint faces. Use jointing compound tofill and seal joints around protrusions. Do not use wire to secure insulation.

Secure insulation segments up to 3500mm outside insulation diameter with filament tape

38mm wide at 300mm centres. Secure insulation segments over 3500mm outside insulation diameter with steel banding.

3.5.13 INSTALLATION OF POLYISOBUTYLENE (PIB) PROTECTION: Wrap pipework and fittings, ductwork or tanks and vessels with PIB sheeting lapped at

every joint by at least 50mm. Solvent weld joints and support with banding in

accordance with manufacturer's recommendations and arrange joints to shed water andprevent the ingress of water.

3.5.14 INSTALLATION OF ALUMINIUM SHEETING PROTECTION: Secure lapped joints (at least 40mm) by means of pop rivets at a maximum spacing of

150mm. For cold piping use matching aluminium straps at maximum spacing of 225mm.On piping operating below ambient temperature seal all joints against moisture. For

external use make joints shed water and use sheets with treated surface.

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Where `lockform' seams are used submit proposals for dealing with surfaces curved inthree dimensions.

Do not puncture the vapour barrier.

3.5.15 INSTALLATION OF RIGID PVC PROTECTION: Apply rigid pvc sheet and pre-formed fittings directly to insulation with an overlap of at

least 40mm on longitudinal and circumferential joints. Secure longitudinal laps withplastic rivets at 150mm centres.

Ensure rigid PVC is not installed in contact with heat sources.

3.5.16 INSTALLATION OF DUCTWORK FIRE PROTECTION INSULATION: Install fire protection insulation on ductwork, in accordance with manufacturer's

instructions.

3.5.17 FLANGES AND VALVES: Cut back to allow removal of bolts and nuts, finish with neat bevel or use end caps. Where boxes are used fit over insulation on adjacent piping. Ensure operation of valve

remains unimpaired with box in place.

3.5.18 LINERS: Where load bearing insulation is required use segmental liners suitable for temperature.

Fit insulant up to liner and carry facing across the pipe ring.

3.5.19 INSTALLATION WHERE INSULATION IS CARRIED THROUGH PIPELINE SUPPORT: For load bearing insulation, carry through insulation and finish. For non-load bearing insulation on hot pipework close butt to a section of load bearing

finished material 100mm long.

For non-load bearing insulation on cold pipework, close butt to high density phenolicfoam pipe supports. Ensure the vapour barrier is maintained.

3.5.20 INSTALLATION WHERE CLOSED CELL INSULATION IS CARRIED THROUGH PIPELINESUPPORT: For load bearing insulation, carry through insulation and finish. For non-load bearing insulation on hot pipework up to 120oC, close butt to a high density

phenolic or polyisocyanurate pipe support. For non-load bearing insulation on cold pipework, close butt to high density phenolic

foam pipe supports. Ensure the vapour barrier is maintained.

3.5.21 INSTALLATION WHERE INSULATION IS NOT CARRIED THROUGH PIPELINE OR DUCTLINESUPPORT:

Provide end caps to match applied finish.

3.5.22 INSTALLATION WHERE INSULATION IS CARRIED THROUGH DUCTWORK SUPPORT: Provide insulation between duct and support using high density phenolic foam strips. Butt

insulation to spacer and carry over finish by 40mm and tape joint. Provide a sheet metalprotecting sleeve.

3.5.23 LIQUID VAPOUR BARRIERS: Apply vapour seal solution evenly by brush in accordance with manufacturer's

instructions; use solution which dries to a colour distinctive from insulating material.

3.5.24 INTEGRITY OF VAPOUR BARRIERS: Where a vapour barrier is indicated ensure its integrity throughout. Repair immediately any damage to vapour barriers and where such barriers have been

applied off site, repair to manufacturer's instructions. Where aluminium sheeting is used for protection submit proposals for securing sheeting

without impairing the integrity of the vapour seal for approval.

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Pay particular attention to the insulation and vapour sealing of plenum boxes and ensureinsulation and vapour barrier are in intimate contact with the top side of the ceilingssurface to ensure that no cold surfaces are presented to the ceiling void.

3.5.25 FIRE COMPARTMENT BREACHES Thermal insulation and vapour barriers on cold pipe work shall be carried through fire

compartment breaches. Intumescent wraps shall be provided to crush the insulation inthe event of a fire.

3.6 FIELD QUALITY CONTROL

3.6.1 Provide field quality control under provisions of Section 01400 - Quality Control.

3.7 CLEANING

3.7.1 Section 01710 - Cleaning installed work.

3.7.2 Remove labels after Work is complete.

3.7.3 Repaint an insulation that has been damaged by paint and concrete splatters.

3.7.4 Restore thermal insulation to as new condition where it has become involved and damagedduring contract period.

3.8 PROTECTION OF FINISHED WORK

3.8.1 Protect work under provisions of Section 01710.

3.8.2 Provide temporary signs to notify operatives and not to climb on finished insulation.

3.9 STANDARD SPECIFICATION

3.9.1 This standard specification is intended to be used as a helpful indication of work within thissection. It is not necessarily comprehensive or complete and it is the Contractor'sresponsibility to ascertain and complete the full works intended and as shown within thedrawings, specification and Contract or thereby implied.

END OF SECTION