Tag Archives: API

API Standard 6D

API Standard 6D, from the American Petroleum Institute, provides specifications for pipeline valves. Scope API 6D covers the design, manufacture, testing, and documentation for pipeline ball, check, gate, and plug valves for pressure ratings up to ASME class 2500. Valve … Continue reading

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API Standard 621

API Standard 621 is a Recommended Practice (RP) that describes guidelines for reconditioning metallic gate, globe, and check valves. Scope API 621 RP provides guidelines for reconditioning heavy wall carbon steel, ferritic alloy, stainless steel, and nickel alloy gate, globe, … Continue reading

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API Standard 600

API Standard 600, from the American Petroleum Institute, describes the criteria for valve design/construction and the material/trim designations for steel gate valves. The most recent version of this standard was published in January 2015, effective as of July 15, 2015. … Continue reading

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Why is My Valve Leaking?

Valve leakage is a common occurrence in industrial settings. Even valves labeled as “zero leakage,” or “bubble tight,” are not necessarily completely leakage-free. This article explores the types and common causes of valve leakage, and then provides information about industry … Continue reading

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API Standard 527

API Standard 527, from the American Petroleum Institute, describes seat tightness testing and the maximum acceptable leakage rates for pressure relief valves. The current version of the standard was reaffirmed in 2007. Scope API 527 covers seat tightness testing of … Continue reading

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API Standard 598

API Standard 598, from the American Petroleum Institute, provides industry standards for valve ratings and valve leakage. The standard is currently in the 9th edition, which was released in 2009. Scope API 598 covers the inspection, examination, and testing requirements for … Continue reading

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