1、 Valve Inspection and Testing API 598 , 2009 This Standard has been translated by the Scientific and Industrial Valve Manufacturers Association with the permission of the American Petroleum In-stitute (API). This translated version shall not replace nor supersede the English lan-guage version which
2、remains API shall not be responsible for any errors, discrepancies or misinterpretations arising from this translation. No additional translation or reproduction may be made of the Standard with-out the prior written consent of API the official version. - (API). , . API , , . API. Valve Inspection a
3、nd Testing API 598 , 2009 - (API) 2011-105396 API, API, . (API) . , . API , , , , , , , , ( ) - , . API , , , . API . , ; , - , , - , , . API , . , . API - . , API, . API , , API. . , - - (, , , ) . : API Publishing Services, 1220 L Street, N.W., Washington, D.C. 20005. Copyright 2006 American Petro
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8、nical Engineers) ASME International, 3 Park Avenue, New York, New York 10016-5990, www.asme.org. 2 MSS (Manufacturers Standardization Society of the Valve and Fittings) Manufacturers Standardization Society of the Valve and Fittings Industry, Inc., 127 Park Street, NE, Vienna, Virginia 221804602, www.mss-. 3 3.6 . , , . 3.7 (NPS) - , , . , NPS , , NPS, , , ASME B16.34. NPS PN ( ) . 3.8 , , , 3.9 , . 4 , 4.1 -
