{"id":69767,"date":"2026-05-17T17:28:03","date_gmt":"2026-05-17T17:28:03","guid":{"rendered":"https:\/\/evgroupchina.com\/encyclopedia-of-metal\/api-st-605\/"},"modified":"2026-05-19T15:31:04","modified_gmt":"2026-05-19T15:31:04","slug":"api-st-605","status":"publish","type":"wiki","link":"https:\/\/evgroupchina.com\/en\/encyclopedia-of-metal\/api-st-605\/","title":{"rendered":"API St 605"},"content":{"rendered":"<h2>Technical requirements of the API St 605 standard for large diameter flanges<\/h2>\n<p>The API St 605 standard defines technical regulations and manufacturing tolerances for carbon steel welding neck flanges equipped with a connecting face. The standard covers products with a nominal pipe size (NPS) ranging from 26 to 60 inches for pressure classes 75, 150, 300, 400, and 600. For products in the NPS 26-48 range, the standard also regulates parameters for pressure class 900. EV Group China ensures the supply of products that fully comply with these specifications, including cast and forged non-removable flanges used as structural elements for valves, fittings, or nozzles.<\/p>\n<p>The nominal flange dimensions regulated by API St 605 are synchronized with pipe fitting sizes, ensuring joint tightness during installation. The product range includes a two-inch size increment for the entire diameter range (from 26 to 60 inches) and pressure classes from 75 to 600, as well as for the 26-48 inch range at pressure class 900.<\/p>\n<p>Technical characteristics monitored by EV Group China specialists during production and supply according to API St 605 include:<\/p>\n<ul>\n<li>Geometric parameters (including weld end configuration and mating surfaces);<\/li>\n<li>Manufacturing tolerances and deviations;<\/li>\n<li>Physicochemical properties of the carbon steel grades used;<\/li>\n<li>Tabular values for operating pressures and temperature limits;<\/li>\n<li>Specifications for fasteners and gaskets;<\/li>\n<li>Product marking standards for batch identification.<\/li>\n<\/ul>\n","protected":false},"featured_media":0,"template":"","meta":[],"wiki_category":[111],"class_list":["post-69767","wiki","type-wiki","status-publish","hentry","wiki_category-api"],"_links":{"self":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki\/69767","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\/69767\/revisions"}],"wp:attachment":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/media?parent=69767"}],"wp:term":[{"taxonomy":"wiki_category","embeddable":true,"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki_category?post=69767"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}