1. PURPOSE
1.1 This global engineering specification defines and describes the minimum requirements for the heat shield system for use on high-temperature piping, valves, and fittings.
2. scope
2.1 This specification provides the material requirements for heat shields on high-temperature piping, valves, and fittings to provide personnel protection, where it has been determined that heat shields are required in lieu of insulation. This insulation material is identified on drawings with the symbols: H3 – Installation of Heat Shields for Personnel Protection (see 4WPI-INS016)
3. related documents
3.1 Air Products Engineering Documents 4WPI-INS016 Installation of Heat Shields for Personnel Protection – Material Symbol H3
3.2 American Society for Testing and Materials (ASTM) B 209 Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate B 221 Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes
3.3 All standards and documents referred to herein shall be the latest issue, unless otherwise stated.
4. DEFINITIONS
4.1 Air Products and Chemicals, Inc. and its subsidiary and associated companies will be referred to herein as Air Products.
4.2 The insulation contractor who supplies and installs the insulation will be referred to herein as the contractor.
4.3 Approved equal in this specification means “approved in writing by Air Products.”
4.4 All temperatures and dimensions in the text of this document are given in metric units with US customary units in parenthesis.
5. WAIVERS
5.1 Applications for waivers of the requirements contained in this specification, or to supply alternative items other than those listed, shall be made in writing to the Air Products representative, who will obtain approval and written authorization from the relevant Air Products manager prior to order, supply, or installation by the contractor.
5.2 In order that any request by the contractor may be evaluated, the contractor shall submit complete and full details of the recommended alternative.
6. MATERIALS
6.1 The contractor shall supply all insulating materials and accessory materials unless otherwise stated in the contract. Table A1 provides a list of materials and full names and addresses of suppliers. As materials may differ in availability by location of supply, Table A1 contains lists per geographical area of supply. The location of supply will be stated in the contract documents from Air Products.
6.2 It is not the intent of this document to “sole-source” the specified materials. The specified material suppliers cited herein are listed for example only and to provide a ready means of accessing the specified products promptly. It is not generally intended to restrict the use of locally available equivalent sources of the same products, at competitive prices.
6.3 All materials are indicated in the text and figures of this and other specifications by the numbers shown in square brackets, thus [0], that refer to the materials in Sections 7 and 8, and are identified in Appendix A of this specification.
6.4. Standoff Material [1]
6.4.1 Typical details for installing heat shields are shown in Figures 1 through 5 in 4WPI-INS016. See Figure 1 and Table 1 for dimensions of standoffs required versus nominal pipe size (NPS).
Figure 1 Heat Shield Standoff Dimensional Detail v Table 1 Heat Shield Standoff Dimensions
| Nominal | Dimensions | ||
| Pipe Size | A | B | T |
| DN [in] | mm [in] | mm [in] | mm [in] |
| 15 [1/2] | 15 [1/2] | 20 [3/4] | 3 [1/8] |
| 20 [3/4] | 15 [1/2] | 20 [3/4] | 3 [1/8] |
| 25 [1] | 15 [1/2] | 20 [3/4] | 3 [1/8] |
| 40 [1-½] | 15 [1/2] | 20 [3/4] | 3 [1/8] |
| 50 [2] | 15 [1/2] | 20 [3/4] | 3 [1/8] |
| 80 [3] | 25 [1] | 25 [1] | 3 [1/8] |
| 100 [4] | 25 [1] | 25 [1] | 3 [1/8] |
| 150 [6] | 50 [2] | 50 [2] | 3 [1/8] |
| 200 [8] | 50 [2] | 50 [2] | 3 [1/8] |
| 250 [10] | 50 [2] | 50 [2] | 3 [1/8] |
| 300 [12] | 50 [2] | 50 [2] | 3 [1/8] |
| 350 [14] | 50 [2] | 50 [2] | 3 [1/8] |
| 400 [16] | 50 [2] | 50 [2] | 3 [1/8] |
| 450 [18] | 50 [2] | 50 [2] | 3 [1/8] |
| 500 [20] | 50 [2] | 50 [2] | 3 [1/8] |
| 600 [24] | 50 [2] | 50 [2] | 3 [1/8] |
| 750 [30] | 50 [2] | 50 [2] | 3 [1/8] |
| 900 [36] | 50 [2] | 50 [2] | 3 [1/8] |
6.5 Other Materials [2] to [7]
6.5.1 Items [2] to [7] are commercially available aluminum or stainless steel items as detailed in Table A1/01 and A1/02.
Table A1/01 Insulation Materials and Names of Suppliers (USA)
| Item No. | Material Description | Acceptable Materials | Manufacturer |
| [1] | Standoff | Aluminum channel, alloy ASTM B 221, 6063-T52 | Ryerson Tull, Inc. 2621 W. 15th Place Chicago, IL 60608 (001) 773 762 2121 www.ryersontull.com |
| McMaster-Carr Supply Company P.O. Box 740100 Atlanta, GA 30374-0100 www.mcmaster.com | |||
| [2] | Band | Aluminum strapping, with or without wing seals, ASTM B 221, alloy 3003. 15 mm x 0.5 mm [1/2 in x 0.020 in] for pipe sizes DIN 15 [1/2 in NPS] | Gerrard & Company 400 E. Toughy Avenue Des Plaines, IL 60018-2684 Tel: (001) 800 800 6763 www.gerrardco.com |
| through DIN 400 [16 in NPS]; 20 mm x 0.5 mm [3/4 in x 0.020 in] for pipe sizes DIN 450 [18 in NPS] and larger | Childers Products Co., Inc. 34799 Curtis Boulevard Eastlake, OH 44095-4107 Tel: (001) 440 953 5200 | ||
| [3] | Guard | Expanded aluminum, flattened, bond sheared edges, ASTM B209, Alloy 5005, 15 mm x 1.5 mm [1/2 in x 0.051 in] | McNichols Company, 5505 W. Gray Street Tampa, FL 33609-1007 (001) 813 282 3828 x2100 www.mcnichols.com |
| Joseph T. Ryerson & Son, Inc., Philadelphia, PA | |||
| [4] | Clip | Aluminum bar, ASTM B 221, Alloy 6061 or 6063, 3 mm x 20 mm [1/8 in x 3/4 in] length as required | Ryerson Tull, Inc. 2621 W. 15th Place Chicago, IL 60608 (001) 773 762 2121 www.ryersontull.com |
| McMaster-Carr Supply Company P.O. Box 740100 Atlanta, GA 30374-0100 www.mcmaster.com | |||
| [5] | Fasteners | Stainless steel, hex washer, head self-drilling screws, No. 8-18, length as required | Various |
| [6] | “U”-Nuts | U-Nut “Tinnerman” stainless steel for No. 8 screw, for use with Item-7 fasteners | Tinnerman Palnut Engineered Products, LLC 1060 West 130th Street Brunswick, OH 44212 Phone: 1-800-221-2344http://www.tinnerman.com/ |
| [7] | Fasteners | Stainless steel, hex washer, self-tapping No. 8, (Type A) screw, length as required. For use with Item-6 “U”-nuts | Various |
Table A1/02 Insulation Materials and Names of Suppliers (Europe)
| Item No. | Material Description | Acceptable Materials | Manufacturer |
| 1 | Standoff | Aluminum channel, alloy ASTM B 221, 6063-T52 | Apollo Metal http://www.apollometals.com/ |
| 2 | Band | Aluminum strapping, with or without wing seals, ASTM B 221, alloy 3003. 15 mm x 0.5 mm [1/2 in x 0.020 in] for pipe sizes DIN 15 [1/2 in NPS] through DIN 400 [16 in NPS]; 20 mm x 0.5 mm [3/4 in x 0.020 in] for pipe sizes DIN 450 [18 in NPS] and larger | Band-It Limited (or equal) Speedwell Industrial Estate Staveley, Nr Chesterfield Derbyshire S43 3PF United Kingdom Tel: +44 (0) 1246 477333 www.band-it.co.uk |
| Childers Products Co., Inc. Eastlake Ohio USA Tel: (001) 440 953 5200 www.childersinc.com | |||
| 3 | Guard | Expanded aluminum, flattened, bond sheared edges, ASTM B209, Alloy 5005, Model 0794AF, LWA=13.97 mm x swdt= 1.8 mm | Expamet http://www.expandedmetalcompany.co.uk/ |
| 4 | Clip | Aluminum bar, ASTM B 221, Alloy 6061 or 6063, 3 mm x 20 | Apollo Metal http://www.apollometals.com/ |
| mm [1/8 in x 3/4 in] length as required | |||
| 5 | Fasteners | Stainless steel, hex washer, head self-drilling screws, No. 8-18, length as required | NABS Ingleston Street Greenock, Scotland PA15 4UQ Phone: 44-1475-793300 http://www.nabs.co.uk/ |
| 6 | “U”-Nuts | U- Nut “Tinnerman” stainless steel for No. 8 screw, for use with Item-7 fasteners | NABS Ingleston Street Greenock, Scotland PA15 4UQ Phone: 44-1475-793300 http://www.nabs.co.uk/ |
| 7 | Fasteners | Stainless steel, hex washer, self-tapping No. 8, (Type A) screw, length as required. For use with Item-6 “U”-nuts | NABS Ingleston Street Greenock, Scotland PA15 4UQ Phone: 44-1475-793300 http://www.nabs.co.uk/ |