This specification describes the minimum requirements for industrial thermal insulation.

Transcription

1 016/09/7 1/7 1.0 PURPOSE This specification describes the minimum requirements for industrial thermal insulation. Read it in conjunction with the applicable insulation and insulation finish specifications as indicated on the project drawings. The work covered by this specification consists of supplying all labour, equipment, materials, and accessories, and of performing all operations necessary for the installation of insulation and finish for piping, plumbing, HVAC ductwork, and mechanical equipment, tanks, and vessels. Note: This specification does not apply to building insulation..0 SUBMITTALS At Vale's request, submit a list of the insulation products to be used on this project for approval. Identify the products by name and type number and also include satisfactory evidence that the products listed comply with the performance requirements of the insulation standard. Obtain approval of this list of products prior to commencing work. At Vale's request, submit samples of insulation products to be used on this project for approval. Obtain approval prior to commencing work. 3.0 DELIVERY, STORAGE, AND HANDLING Deliver and store all products in their original manufacturer's standard commercial containers in undamaged condition, sealed with labels intact, having manufacturer's name, brand, quantity, nominal dimensions, facing, and accessories, if any, type, CGSB, ASTM, ULC rating, or other references to accepted standards clearly shown. Protect on the site stored insulation and accessories from water damage and other abuse. Inside storage is recommended. If stored outside, stack cartons on pallets and cover adequately to prevent moisture infiltration. Keep insulation absolutely dry at all times. 4.0 QUALITY ASSURANCE All products to be used in these project specifications to meet or exceed the performance requirements specified under Materials and Acceptable Products part of the Insulation Standards. 5.0 GENERAL REQUIREMENTS 5.1 Apply insulation only after tests and approvals required by the specifications have been completed.

2 016/09/7 /7 5. All surfaces that are to be insulated must be cleaned/prepared by removing all scale, rust, dirt, oil, grease or other foreign matter. Apply insulation on clean, dry surfaces only. 5.3 Any surface considered to be unsuitable for the above specified cleaning or for the application of thermal insulation, must be reported to Vale's Representative. 5.4 Where surfaces to be insulated have operating temperatures in excess of 600 F, apply the insulation in or more separate layers. 5.5 Stagger all joints in multi-layer insulation applications so that there are no through joints from the insulated surface to the outside surface of the insulation. 5.6 Supply and install any additional or new insulation supports, metal rods, clips, etc. where required. 5.7 On all piping, ductwork, and equipment provide compensation for contraction and expansion. 5.8 Apply all wires straight, drawn, and twisted tight so as to prevent loosening. Kinking of wire loops is not permitted. Bend down and press into insulation all protruding ends or hammer flat so as to leave no sharp projections. 5.9 Apply bands straight and tighten mechanically before crimping the seal. Where bands are used to secure insulation jacket, do not pierce the jacket Supports attached directly to equipment, pipe, or duct, or hangers clamped directly to pipe or duct insulated for hot service must have insulation fitted around the supports or around the hanger clamps. Fill voids with insulating cement, seal with a reinforced layer of a suitable breather type weatherproofing mastic at openings in the insulation jacket Attachments to insulated piping, equipment, or ductwork for hot service with the operating temperature in excess of 400 F to be insulated for a distance equal to 4 times the insulation thickness. The thickness of the attachment insulation to be not less than one-half of the insulation thickness of the piping, equipment or ductwork. 5.1 Supports attached directly to equipment, pipe, or duct; or hangers clamped directly to pipe or duct insulated for cold or dual temperature service must have the insulation fitted around the supports or around the hanger clamps. Fill voids with similar insulation and seal with a vapour barrier jacket Attachments to insulated piping, ductwork, and equipment for cold or dual temperature service with the operating temperature lower than 50 F. must be insulated for a distance equal to 4 times the insulation thickness. The thickness of the attachment insulation to be not less than one-half of the insulation thickness of the piping, ductwork and equipment.

3 016/09/7 3/ On curved segments, blocks, and segmental pipe insulation, cut square before application, the chipped or rounded edges or corners In making tie-ins to existing single layer insulation, the new weather coating or outer insulation jacket must lap the existing cover at least 6 inches In making tie-ins to existing multi layer insulation, the new outer layer must overlap the existing inner layer at least 6 inches. The new weather coating or outer insulation jacket must lap the existing cover at least 6 inches Do not insulate vessel nameplates. Seal insulation surrounding these plates to prevent water from entering Where nameplates, etc., cannot be left visible, record their exact locations under insulation and hand the list to the Vale Representative upon completion of the work Position laps of metal jacket to shed water, or caulk and seal to provide a weather-tight joint which will prevent entrance of water and to protect the insulation from wind damage. Do not use insulating cement for sealing purposes. 5.0 Secure metal jacket by bands. The bands to be capable of compensating for pipe expansion. 5.1 On vertical surfaces provide means to prevent sliding of the bands. 5. To allow for thermal expansion and movement of metal jacket sections, do not use screws in the end of metal jacket. 5.3 The finished surface of the metal jacketing to be free of dents and kinks. 5.4 Where the mastic finish of the fittings adjoins the metal jacket on the pipes, bond and seal the two to provide a weathertight joint. 5.5 Seal edges of insulation openings around manholes, nozzles, cutouts for stud removal, pipe supports, and other attachments to prevent water from entering. Use metal covers if temperatures are beyond the usable range of weatherproofing coatings. 5.6 Provide packed expansion and contraction joints in insulation to compensate for circumferential and longitudinal expansion and contraction in the piping and equipment. Contractor to base the expansion and contraction movements on the design conditions provided on drawings. Contractor to submit his design and location of the joints to Vale for review.

4 016/09/7 4/7 5.7 Do not bring components of dissimilar metals subject to galvanic corrosion into contact with each other. Do not use plates or clad accessories. Do not use galvanized items in the area of stainless steel. 5.8 For every PPM of leachable chloride in the insulation material, there must also be 0 PPM of sodium and silicate. Insulation containing more than 800 PPM chlorides is not acceptable for use on stainless steel vessels. Manufacturer to provide test data acceptable to Vale to substantiate above requirement. 6.0 PIPE INSULATION 6.1 Apply insulation on pipelines with hangers, saddles, etc. after they have been set in their permanent location. If it is necessary to block or shore up pipe to install the insulation or should it be necessary to displace or remove hangers, restore the pipe and hangers to their original location and alignment after the insulation has been completed. 6. Install metal stops on straight vertical pipelines not more than 15 feet apart for supporting the insulation. 6.3 Carry insulation full thickness over flanges, valves, expansion joints, stiffeners, etc., including all obstructions projecting more than 0 percent of the total insulation thickness. 6.4 Over expansion joints provide for the necessary free movement of insulation and jacketing. 6.5 Allow for proper clearances at sliding supports. 6.6 Insulate valve bodies up to the packing gland. 6.7 Do not insulate screwed unions and final connections to equipment other than process equipment. 6.8 Support insulated piping in cold or dual temperature service from outside of insulation. Install rigid insulation inserts such as calcium silicate, foam glass, or treated wood blocks, under outside hangers and supports. Thickness of inserts to be equal to the adjoining insulation. Supply and install galvanized steel insulation shields. Shield length to be as recommended by the hanger manufacturer. Provide vapour barrier seals where required. 6.9 Where insulation is applied on steam or electric traced lines, the annular cross section of the pipe insulation to be large enough to accommodate both the pipeline and the tracer without leaving a gap between piping insulation segments Where a tie-in is made to a line in cold service, apply a vapour stop to existing insulation. Thoroughly seal the insulated surface integrally with the exterior surface of the insulation before applying the new insulation.

5 016/09/7 5/ Do not insulate traps and strainers. 6.1 Insulate valve bodies, bonnets, strainers and flanges unless specified otherwise on the project drawings. 7.0 PIPE INSULATION - CELLULAR GLASS AND POLYURETHANE 7.1 Install contraction and expansion joints in both horizontal and vertical straight-run piping as follows: Single Layer: Double Layer: Triple Layer: One for each 45 ft. One for each 33 ft. One for each 1 ft. Where flanged joints occur within these limits, provide for contraction and expansion in the flange covers instead at the joints. 8.0 HVAC DUCTWORK INSULATION 8.1 Maintain clearances for the operation of dampers, maintenance of filters and installation and maintenance of controls. 8. Carry full insulation thickness over duct surfaces and standing seams. Do not insulate flexible connections. 9.0 EQUIPMENT INSULATION 9.1 Carry insulation up to the equipment nozzles. Cover the flanged nozzle connection with sections of oversized pipe insulation. Fill the void between the finished equipment insulation and the flange with a collar of pipe insulation. 9. Shape curved segments and flat blocks to fit the contour of equipment surfaces or insulation surfaces in the case of multi-layer application. 9.3 Use finish fillets on inside corners and round outside corners. Where cement coats are used to finish insulation, install corner beads on outside corners. 9.4 Thermal insulation over access openings, manholes, etc., to be of the same thickness as specified for the adjacent surfaces and applied so that the application does not interfere with opening and closing such openings.

6 016/09/7 6/7 9.5 Extend the insulation beyond the straight portion of equipment shells to support the head, cone, and transition insulation. On tanks, extend insulation up to support drip ring and the roof insulation. 9.6 Provide pre-formed flashing, AISI Type 304 stainless steel sheet, minimum 0.00" thick, at the junction of the wall and roof of vessels and extend down over the wall jacketing REFERENCE DOCUMENTATION The following documents are related to this specification and shall be used to their latest revision: ASTM C 547 ASTM C 585 ASTM C 1136 Standard Specification for Mineral Fiber Pipe Insulation Standard Practice for inner and Outer Diameters of Rigid Thermal Insulation for Nominal Sizes of Pipe and Tubing (NPS system) Standard Specification for Flexible. Low Permeance Vapor Retarders for Thermal Insulation

7 016/09/7 7/ REVISION AND TRANSITION NOTES Revision notes describe: what was changed, and if applicable, why it was changed, and the plan to implement the change, including whether changes are retroactive. Note: The revision notes are a summary of the changes and may not necessarily be a complete list. A risk code is entered for each revision and if applicable, the revision notes will describe how risk was addressed for the revision. Risk Code A Risk Category This revision is a minor change and/or introduces no risk. B C Risk has been addressed for this revision by the reviewer and approver. Low risk or no new hazards identified. For this revision, a PHR or other risk management tool has been used to address risk and minimize hazards. This risk assessment has been documented and is available through Central Engineering. Rev 1 Revision Notes Document format and number changed due to Vale engineering Document Program changes in 011/01. Previous Standard number was Rev 3. Document Reviewed Format updated No other changes Risk Code Approved by Reviewed by Issue Date YYYY/MM/DD --- AR AR 01/1/18 A M.Fogarty A.Delost 016/09/7