API 598 and ISO 5208 are widely‑used standards for valve pressure testing. This article explains their differences, application scope and acceptance criteria for industrial valves.
Valve leakage classes define allowable seat‑seal leakage for industrial valves. This article compares Class I‑VI leakage requirements covered by ISO 5208, API 598 and EN 12266‑1, helping buyers and engineers specify correct acceptance criteria for valve procurement and factory inspection.
NACE MR0175 / ISO 15156 defines requirements for sour‑service valves operating in oil and gas environments containing hydrogen sulfide. This article covers material restrictions, hardness limits and key acceptance criteria for valve selection in corrosive sour gas projects.
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Xian Hengfeng Electromechanical Equipment Co.,Ltd
No.15,group 3,Sanlian Village,Dazhao Street Office,Chang’an District,Xi’an City, Shaanxi Province
Yiwu Hengfeng Electromechanical Equipment Company
Zongtang 1st District, Jiangdong Street, Yiwu City, Jinhua City, Zhejiang Province
