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2、, . : , “ . : , “ , . API, , . , , , , , , American Petroleum Institute, 1220 L Street, N.W., Washington, D.C. 20005. , , . API , , . . API, (202) 682-8000. API API, : 1220 L Street, N.W., Washington, D.C. 20005. , API, 1220 L Street, NW, Washington, DC 20005, standardsapi.org. iii 1 1 2 1 3 . 3 4 .
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6、.5M, ASME B18.2.3.6M, ASME B18.2.4.6M, ASME B31.3, ASME B31T, ASTM A193 2, ASTM A194, ASTM A307, 60,000 psi (413,7) ASTM A320, 1 ASME( ) International, 3 Park Avenue, New York, New York 10016, www.asme.org. 2 ASTM( ) International, 100 Bar Harbor Drive, West Conshohocken, Pennsylvania 19428, www.ast
7、m.org. -, 3 ASTM A439, AWS A 5.13 3, AWS A 5.21, ISO52104, , MSS SP-45 5, () () MSS SP-55, MSS SP-91, MSS SP-102, . 3 : 3.1 - , / . . , , . , , , , , . 3.2 DN - , , , , “DN” , . , “DN” , . 3.3 NPS - , , , , “NPS” , . “NPS.” . 3.4 , , API 603. 3 AWS ( ), 550 N.W. LeJeune Road, Miami, Florida 33126, www.aws.org. 4 ISO ( ), 1, ch. de la Voie-Creuse, Case postale 56, CH-1211, Geneva 20, Switzerland, www.iso.org. 5 MSS ( ), Inc., 127 Park Street, NE, Vienna, Virginia 22180- 4602, www.mss-. 4 API 603 4 4.1 , ASME B16.34 . 4.2 , (, ) ( ) (. 8). 4.3 , . , , . , . 4.4 , ASME B16.34, , .
