This Recommended Practice provides guidelines for reconditioning heavy wall (API 600 type) carbon steel, ferritic alloy (up to 9% Cr), stainless steel, and nickel alloy gate, globe, and check valves for ASME pressure classes 150, 300, 400, 600, 900, 1500, and 2500. Guidelines contained in this RP apply to flanged and butt weld cast or forged valves.
API RP 621:2005 History
API RP 621:2018
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API RP 621 (R2017)
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API RP 621:2005
$72.00 $144.00
API RP 621:2001
$72.00 $144.00
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API Spec 11AX:2015
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API RP 1173 (R2023) and Companion Guide Bundle
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