{"id":67021,"date":"2026-04-20T13:34:17","date_gmt":"2026-04-20T13:34:17","guid":{"rendered":"https:\/\/evgroupchina.com\/encyclopedia-of-metal\/din-2638\/"},"modified":"2026-04-20T13:42:34","modified_gmt":"2026-04-20T13:42:34","slug":"din-2638","status":"publish","type":"wiki","link":"https:\/\/evgroupchina.com\/en\/encyclopedia-of-metal\/din-2638\/","title":{"rendered":"DIN 2638"},"content":{"rendered":"<h2>Technical features and application of DIN 2638 flanges<\/h2>\n<p>The DIN 2638 standard regulates the design parameters and technical requirements for weld neck flanges designed for operation at a nominal pressure of PN 160 (160 bar) in a nominal diameter range from DN 10 to DN 300. These pipeline system components ensure high joint tightness under high-pressure conditions.<\/p>\n<p>Structurally, the flange consists of a disc with holes for fasteners (bolts or studs) and a conical transition element (neck or hub), which ensures uniform distribution of mechanical stress in the weld zone when welded to the pipeline. EV Group China supplies products that comply with strict industry quality standards.<\/p>\n<p>Geometric characteristics, manufacturing tolerances, requirements for the state of contact sealing surfaces, and calculated weight are regulated by this standard in conjunction with the norms for seals according to DIN 2526 and marking according to DIN 2519.<\/p>\n<h3>Materials used<\/h3>\n<ul>\n<li>Austenitic stainless steels.<\/li>\n<li>Carbon structural steels.<\/li>\n<li>Alloyed steels for pressure-bearing applications.<\/li>\n<li>Heat-resistant steel grades for high-temperature processes.<\/li>\n<\/ul>\n<p>For products made of C22 grade steel, the nominal pressure operating parameters are maintained at medium temperatures up to 120\u00b0C. In the temperature range from 120\u00b0C to 300\u00b0C, it is necessary to consider the reduction in the material&#8217;s yield strength when designing pipeline piping.<\/p>\n<p><img decoding=\"async\" alt=\"Photo - DIN 2638 weld neck flange\" src=\"\/image\/catalog\/wiki\/flange\/DIN 2627-2638.png\" title=\"DIN 2638 weld neck flange\"><img decoding=\"async\" alt=\"Photo - DIN 2638 weld neck flange drawing\" src=\"\/image\/catalog\/wiki\/flange\/DIN 2627-2638 \u0447\u0435\u0440\u0442\u0435\u0436.png\" title=\"DIN 2638 weld neck flange drawing\"><\/p>\n<p><strong>Attention: The DIN 2638 standard is considered obsolete. Today, the production and supply of these flanges are carried out in accordance with the requirements of the modern international standard DIN EN 1092-1 (type 11B). EV Group China specialists are ready to advise you on selecting complete equivalents.<\/strong><\/p>\n","protected":false},"featured_media":0,"template":"","meta":[],"wiki_category":[116,122],"class_list":["post-67021","wiki","type-wiki","status-publish","hentry","wiki_category-din","wiki_category-standarty"],"_links":{"self":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki\/67021","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\/67021\/revisions"}],"wp:attachment":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/media?parent=67021"}],"wp:term":[{"taxonomy":"wiki_category","embeddable":true,"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki_category?post=67021"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}