{"id":69671,"date":"2026-05-17T17:27:33","date_gmt":"2026-05-17T17:27:33","guid":{"rendered":"https:\/\/evgroupchina.com\/encyclopedia-of-metal\/mss-sp-61\/"},"modified":"2026-05-19T15:30:23","modified_gmt":"2026-05-19T15:30:23","slug":"mss-sp-61","status":"publish","type":"wiki","link":"https:\/\/evgroupchina.com\/en\/encyclopedia-of-metal\/mss-sp-61\/","title":{"rendered":"MSS SP-61"},"content":{"rendered":"<h2>Technical Regulations and Valve Testing Standards per MSS SP-61<\/h2>\n<p>The international standard MSS SP-61 defines strict protocols and verification criteria for the leak-tightness of valve bodies and shut-off components. Engineers at EV Group China utilize these standards to ensure the complete safety of industrial systems operating under high pressure.<\/p>\n<p>All pressure testing procedures, including checks for structural integrity and the performance of sealing elements, are conducted on products that have completed the series production cycle and are prepared for operation in critical main pipelines.<\/p>\n<h3>Key Stages of the Testing Cycle<\/h3>\n<ul>\n<li>Hydraulic or pneumatic shell test for leak-tightness under excess pressure.<\/li>\n<li>Verification of seat and closure member tightness to prevent internal leakage of the working medium.<\/li>\n<li>Monitoring for the absence of visible leaks (Bubble Tight) in accordance with stringent standard requirements to ensure zero emission levels.<\/li>\n<\/ul>\n","protected":false},"featured_media":0,"template":"","meta":[],"wiki_category":[113],"class_list":["post-69671","wiki","type-wiki","status-publish","hentry","wiki_category-mss"],"_links":{"self":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki\/69671","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\/69671\/revisions"}],"wp:attachment":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/media?parent=69671"}],"wp:term":[{"taxonomy":"wiki_category","embeddable":true,"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki_category?post=69671"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}