1、 A-A-60001 9999974 0174717 503 INCH-POUND A-A-6000 1 June 17. 1997 SUPERSEDING May21,1984 WW-T-696E COMMERCIAL ITEM DESCRIPTION TRAPS, STEAM The General Services Administration has authorized the use of this commercial item description for all Federal agencies. 1. SCOPE. This commercial item descrip
2、tion (CID) covers traps for draining water and other condensate, for removing air and other gases from pipelines and equipment, and other applications (see 7.1). 2. CLASSIFICATION. Traps shall be of the following types, styles, classes and size as specified (see 7.3). Type I - Trap, bucket Style A -
3、 Open bucket Style B - Inverted bucket Type II - Trap, ball float Type III - Trap, disk, thermodynamic Type IV - Trap, orifice or impulse Type V - Trap, thermostatic Style A - Bellows or membrane Style B - Bimetallic element Type VI - Trap, combination float and thermostatic 2.1 Class. Traps shall b
4、e of the following classes based on maximum working pressure range and steam temperature range, as specified (see 7.3): Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any data which may improve this document should be sent to: Commanding Officer (Code 15E2), Nav
5、al Construction Battalion Center, 1000 23rd Avenue, Port Hueneme, CA 93043-4301, by using the Standardization Document Improvement Proposal D Form 1426) appearing at the end of this I document or by letter. I AMSC N/A FSC 4730 Licensed by Information Handling ServicesProvided by IHSNot for ResaleNo
6、reproduction or networking permitted without license from IHS-,-,-A-A-60001 9999974 0174718 44T Working pressure range Pounds-force per square inch (psig) (kilopascal (kpa) Class 1 Vacuum to 15 psig (Vacuum to 103.4 Ha) class 2 O to 25 psig (O to 172.4 Ha) class 3 O to 65 psig (O to 448.2 Ha) class
7、4 O to 125 psig (O to 861.8 Ha) class 5 O to 150 psig (O to 1034.2 Ha) Class 6 O to 200 pig (O to 1379.0 kPa) class 7 O to 250 pSig (O to 1723.7 Ha) Class 8 O to 300 psig (O to 2068.4 kPa) class 9 O to 600 psig (O to 4136.9 kPa) f Steam temperature range Degrees Fahrenheit (OF) (Celsius ( OC) 212 OF
8、 to 250 OF (100 OC to 121 OC) 212 OF to 267 OF (100 OC to 131 OC) 212 “F to 312 OF (100 OC to 156 OC) 212 OF to 400 OF (100 OC to 204 OC) 212 OF to 400 OF (100 OC to 204 OC) 212 OF to 400 OF (100 OC to 204 OC) 212 OF to 450 OF (100 OC to 232 OC) 212 OF to 600 OF (100 OC to 316 OC) 212 T to 750 OF (1
9、00 OC to 399 OC) A-A-6000 1 . 2.2 s;sce porosity, cracks, incomplete fsion, or deformation of material. 3.13.3 Machined work. Machined surfixes shall conform to good commercial practice to ensure proper nctioning, interchangeabiity, and long life. The surface roughness of flange gasket facings shall
10、 be not more than 125 micro-inches (3.2 micrometre) in accordance with ANSI B16.5. 4. REGULATORY REQUIREMENTS. 4.1 Materials. The offeror/contractor is encouraged to use recovered materials to the maximum extent practicable, in accordance with paragraph 23.403 of the Federal Acquisition Regulation (
11、FAR.). Unless otherwise specified herein, all equipment, material, and articles incorporated in the work covered by this commercial item description are to be new and fabricated using materials produced fiom recovered materials to the maximum extent possible without jeopardizing the intended use. Th
12、e term “recovered materials” means materials which have been collected or recovered fiom solid waste and reprocessed to become a source of raw materials, as opposed to virgin raw materials. Unless otherwise specified, none of the above shall be interpreted to mean that the use of used or rebuilt pro
13、ducts are allowed under this commercial item description. 4.2 Metric Droducts. Products man-ed to metric dimensions will be considered on an “oual basis with those manufctured using inch-pound Units, provided they fall within specified tolei xes using conversion tables contained in the latest versio
14、n of ASTM E 380, and all other requirements of this commercial item description including foxm, fit and function are met. If a product is mandctured to metric dimensions and those dimensions exceed the tolerances specified in the 6 Provided by IHSNot for ResaleNo reproduction or networking permitted
15、 without license from IHS-,-,- - A-A-60001 9999974 0174723 807 A-A-6000 1 inch-pound units, a request should be made to the contracting officer to determine ifthe product is acceptable. The contracting officer has the option of accepting or rejecting the product. 5. QUALITY ASSURANCE PROVISIONS. 5.1
16、 Product conformance. The products provided shall meet the salient characteristics of this commercial item description, conform to the producers own drawings, specifications, standards, and quaity assurance practices, and be the same product offered for sale in the commercial market. The government
17、reserves the right to require proof of such conformance. 6. PACKAGING. The preservation, packing, and marking shall be as specified in the contract or order. 7. NOTES. 7.1 Trap limitations. When traps are selected, the following limitations on the various types of traps should be considered: a. b. C
18、. d. Type I, bucket trap. (1) Trap will not operate where a continuous water seal cannot be maintained. (2) Must be protected from freezing. (3) Air handiing capacity not as great as type VI traps. Type II, ball float trap. (1) Must be protected from freezing. (2) Operation of some models may be aff
19、ected by water hammer. (3) Primary application is as a liquid drainer or air vent. Type II, disk trap. (1) Not suitable for pressures below 10 psi (68.9 Ha). (2) Not recommended for back pressures greater than 50 percent of inlet pressure. Type IV, impulse or orifice trap. (1) Not recommended for sy
20、stems having back pressure greater than 50 percent of the (2) Not recommended where subcooling temperature is 3 0 F (1 7 C) below the saturated (3) Should not be used where efficiency is a factor. inlet pressure. steam pressure. Provided by IHSNot for ResaleNo reproduction or networking permitted wi
21、thout license from IHS-,-,-A-A-6000 1 e. Type V, thermostatic trap. (1) Limited to applications in which condensate can be held back and subcooled before (2) Operation of some models may be affected by water hammer. (3) Diaphragm and bellows types are limited to applications of 300 psi (2068.4 kPa)
22、and being discharged. 425 F (218.3 C) maximum. f. Type VI combmation trap. (i) Cannot be used on superheated steam systems. (2) Must be protected rom reezng. (3) Operation of some models may be affected by water hammer. 7.2 Source of documents. 7.2.1 The Federal Acquisition Regdation (FAR) and Code
23、of Federal Regulations (CFR) may be obtained rom the Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402. 7.2.2 ASTM Standards are available fiom American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. 7.2.3 ANSI Standards a
24、re available fiom American National Standards Institute, 1 1 West 42nd Street, New York, NY 10036. 7.3 Ordering data. Acquisition documents should spec$ the foliowing: a. b. d. e. f. g. h. C. 1. j. k. 1. m. n. Title, number, and date of this CID. Type, style, class, and size required (see 2., 2.1 an
25、d 2.2). Iftraps required to fail at other than the manufcturers option (see 3.3). Sizeandplaneofinlet, outlet, andotherconnectionsrequred (see3.3,3.3.1.1,3.3.1.2 and 3.3.5). When auxiliary air vents are required (see 3.3.1.2). Ifintegrai strainer is required on type& type lII and type Vtraps (see 3.
26、3.1.3, 3.3.3.1 and 3 -3.5.1). When drain plugs or cocks are required (see 3.3.2,3.3.6 and 3.9). Material and composition of strainer screens (see 3.4.1). Ifspecial gaskets are required (see 3.4.2). Ifend connections are different (see 3.5). Ifan air cock is required (see 3.8). Capacity of trap requi
27、red and if a greater than 20 OF (1 1 OC ) temperature depression is desiredfortypeVtraps(see3.11.1). If special exterior fish of treatment or paint is required (see 3.12). When equalizing connectors are required (see 3.3.2). 8 Provided by IHSNot for ResaleNo reproduction or networking permitted with
28、out license from IHS-,-,-A-A-6000 1 7.4 Part Identification Number PlN) , . The following part identification numbering procedure is for government purposes and does not constitute a requirement for the contractor. The PIN to be used for items acquired to this description are created as follows: AA6
29、0001 - XXX-X-X CD number a Type code Style code Class code 7.4.1 Example of PIN. Example 1. Inverted bucket steam trap, 0-150 psig (O to 1 034.2 Wa), 212 OF to 400 OF (100 OC to 204 OC) PIN designation: AA6000 1 -I B 5 Example 2. Disk steam trap, 0-25 psig (O to 172.4 kPa), 212 OF to 267 OF (100 OC
30、to 131 OC) PIN designation: AA60001-III 2 MILITARY INTERESTS: Custodians: Navy - YD1 Air Force - 99 Army - CE Review Activities: Navy - SH DLA - CS CIVIL AGENCY COORDINATING ACTIVITY: GSA - FSS Preparing Activity Navy - YD1 (Project 4730-0676) 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
