{"id":69655,"date":"2026-05-17T17:27:28","date_gmt":"2026-05-17T17:27:28","guid":{"rendered":"https:\/\/evgroupchina.com\/encyclopedia-of-metal\/api-st-526\/"},"modified":"2026-05-19T15:30:16","modified_gmt":"2026-05-19T15:30:16","slug":"api-st-526","status":"publish","type":"wiki","link":"https:\/\/evgroupchina.com\/en\/encyclopedia-of-metal\/api-st-526\/","title":{"rendered":"API St 526"},"content":{"rendered":"<h2>Technical Standards and Operational Specifications According to API St 526<\/h2>\n<p>This specification defines rigorous industry requirements for the design and supply of steel flanged pressure relief valves. The standard regulates the operational parameters of spring-loaded and pilot-operated pressure relief devices, ensuring industrial safety for critical pipeline system components.<\/p>\n<p>Key regulated parameters include:<\/p>\n<ul>\n<li>Classification of orifice areas and calculation of effective discharge area;<\/li>\n<li>Connection flange dimensions and compliance with nominal pressure (PN\/Class) at the inlet and outlet;<\/li>\n<li>Requirements for physical and chemical properties of body materials and internal components;<\/li>\n<li>Operating temperature ranges and maximum allowable pressure levels;<\/li>\n<li>Face-to-face dimensions ensuring equipment interchangeability.<\/li>\n<\/ul>\n<p>EV Group China provides expert support in selecting pressure relief valves in accordance with API St 526. Product marking, nameplate requirements, and stamping procedures strictly comply with the provisions of Annex A of this standard.<\/p>\n","protected":false},"featured_media":0,"template":"","meta":[],"wiki_category":[111],"class_list":["post-69655","wiki","type-wiki","status-publish","hentry","wiki_category-api"],"_links":{"self":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki\/69655","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki\/69655\/revisions"}],"wp:attachment":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/media?parent=69655"}],"wp:term":[{"taxonomy":"wiki_category","embeddable":true,"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki_category?post=69655"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}