{"id":69794,"date":"2026-05-17T17:28:11","date_gmt":"2026-05-17T17:28:11","guid":{"rendered":"https:\/\/evgroupchina.com\/encyclopedia-of-metal\/mss-sp-78\/"},"modified":"2026-05-19T15:31:15","modified_gmt":"2026-05-19T15:31:15","slug":"mss-sp-78","status":"publish","type":"wiki","link":"https:\/\/evgroupchina.com\/en\/encyclopedia-of-metal\/mss-sp-78\/","title":{"rendered":"MSS SP-78"},"content":{"rendered":"<h2>Technical regulations and scope of application for valves according to the MSS SP-78 standard<\/h2>\n<p>This regulatory document establishes strict requirements for the design, manufacturing, and quality control of plug valves made of gray cast iron. The standard applies to shut-off valves equipped with both flanged and threaded connection elements for pipeline systems.<\/p>\n<p>The technological parameters presented in the specification cover a wide range of nominal diameters and pressure-temperature classes, allowing this equipment to be used in various general-purpose industrial engineering networks. EV Group China specialists ensure the compliance of supplied products with all points of this standard.<\/p>\n<p>The documentation contains comprehensive information on the following aspects:<\/p>\n<ul>\n<li>Standards for the chemical composition of casting alloys.<\/li>\n<li>Mechanical properties of materials, ensuring durability during operation.<\/li>\n<li>Geometric tolerances and standardized dimensions of connecting ends, ensuring tightness and ease of installation within assemblies.<\/li>\n<\/ul>\n<p>When selecting shut-off valves compliant with MSS SP-78, EV Group China engineers recommend considering the operating environment and temperature limitations of gray cast iron as set forth in the requirements of this industry standard.<\/p>\n","protected":false},"featured_media":0,"template":"","meta":[],"wiki_category":[113],"class_list":["post-69794","wiki","type-wiki","status-publish","hentry","wiki_category-mss"],"_links":{"self":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki\/69794","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\/69794\/revisions"}],"wp:attachment":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/media?parent=69794"}],"wp:term":[{"taxonomy":"wiki_category","embeddable":true,"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki_category?post=69794"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}