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american petroleum institute Purchasing Guidelines . API Monogram Equipment Purchase API Spec 6dss online at API Specification ISO 14723:2009 (Identical), petroleum and natural gas 6dss . industries Pipeline transportation systems . Subsea pipeline valves Second Edition, December 2009. Specification for Subsea Pipeline Valves Pressure and temperature ratings The nominal pressure (PN) class or the ASME rating class shall be used for the specification of the required pressure class. Valves covered by this International Standard shall be furnished in one of the following classes: PN 20 (class 150);. PN 50 (class 300);. PN 64 (class 400);. PN 100 (class 600);. PN 150 (class 900).

American Petroleum Institute API®® 6DSS

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