{"id":1501,"date":"2026-04-10T02:34:41","date_gmt":"2026-04-10T09:34:41","guid":{"rendered":"https:\/\/www.songhaiflanges.com\/?p=1501"},"modified":"2026-04-10T02:39:41","modified_gmt":"2026-04-10T09:39:41","slug":"high-pressure-flange-selection-asme-class-900-2500-guide","status":"publish","type":"post","link":"https:\/\/www.songhaiflanges.com\/fr\/high-pressure-flange-selection-asme-class-900-2500-guide\/","title":{"rendered":"High-Pressure Flange Selection: ASME Class 900-2500 Guide"},"content":{"rendered":"<h2>High-Pressure Flange Selection: Class 900-2500<\/h2>\n<p><strong>Published:<\/strong> April 10, 2026 | <strong>Category:<\/strong> Technical Guide<\/p>\n<h3>What Is High-Pressure?<\/h3>\n<ul>\n<li><strong>Low:<\/strong> Class 150, 300 (up to 720 PSI)<\/li>\n<li><strong>Medium:<\/strong> Class 400, 600 (up to 2,000 PSI)<\/li>\n<li><strong>High:<\/strong> Class 900, 1500, 2500 (2,000-9,000+ PSI)<\/li>\n<\/ul>\n<h3>Best Flange Types<\/h3>\n<h4>Weld Neck (Preferred)<\/h4>\n<p>Tapered hub provides excellent stress distribution. Best for fatigue resistance, cyclic loading, thermal shock.<\/p>\n<h4>Ring Type Joint (RTJ)<\/h4>\n<p>Metal-to-metal sealing. Types: R (standard), RX (pressure-energized), BX (API 6B). Up to 10,000+ PSI.<\/p>\n<h3>Pressure-Temperature Ratings<\/h3>\n<table>\n<thead>\n<tr>\n<th>Class<\/th>\n<th>100\u00b0F<\/th>\n<th>400\u00b0F<\/th>\n<th>800\u00b0F<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>900#<\/td>\n<td>2,160 PSI<\/td>\n<td>1,980 PSI<\/td>\n<td>1,530 PSI<\/td>\n<\/tr>\n<tr>\n<td>1500#<\/td>\n<td>3,600 PSI<\/td>\n<td>3,300 PSI<\/td>\n<td>2,550 PSI<\/td>\n<\/tr>\n<tr>\n<td>2500#<\/td>\n<td>6,000 PSI<\/td>\n<td>5,500 PSI<\/td>\n<td>4,250 PSI<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Materials<\/h3>\n<ul>\n<li><strong>A105:<\/strong> -20\u00b0F to 800\u00b0F (general service)<\/li>\n<li><strong>A350 LF2:<\/strong> -50\u00b0F to 650\u00b0F (low temp)<\/li>\n<li><strong>F304\/L, F316\/L:<\/strong> -425\u00b0F to 1000\u00b0F (corrosive)<\/li>\n<li><strong>F11, F22, F91:<\/strong> Up to 1200\u00b0F (high temp)<\/li>\n<\/ul>\n<h3>Gaskets<\/h3>\n<ul>\n<li><strong>RTJ:<\/strong> Soft iron, steel, SS, Inconel (up to 10,000+ PSI)<\/li>\n<li><strong>Spiral Wound:<\/strong> SS\/Graphite (up to 2,500 PSI)<\/li>\n<li><strong>Camprofile:<\/strong> SS core with facing (up to 2,500 PSI)<\/li>\n<\/ul>\n<h3>Bolts<\/h3>\n<ul>\n<li><strong>A193 B7:<\/strong> Standard (up to 800\u00b0F)<\/li>\n<li><strong>A193 B8\/B8M:<\/strong> Stainless (corrosive)<\/li>\n<li><strong>A193 B16:<\/strong> High temp (up to 1000\u00b0F)<\/li>\n<li><strong>A320 L7:<\/strong> Low temp (down to -150\u00b0F)<\/li>\n<\/ul>\n<h3>Common Mistakes<\/h3>\n<ol>\n<li>Using slip-on for Class 900+<\/li>\n<li>Wrong gasket type<\/li>\n<li>Inadequate bolt torque<\/li>\n<li>Ignoring temperature effects<\/li>\n<\/ol>\n<h3>Songhai Capabilities<\/h3>\n<ul>\n<li>Classes: 900# to 2500# (4500# on request)<\/li>\n<li>Types: WN, RTJ, Orifice, Special<\/li>\n<li>Materials: A105, LF2, F304\/L, F316\/L, F11, F22, F91<\/li>\n<li>Certifications: ASME, PED, API, NACE<\/li>\n<\/ul>\n<p><strong>High-pressure project?<\/strong> Contact Songhai for technical support.<\/p>\n<p><strong>WhatsApp:<\/strong>\u00a0+86-18658777855<\/p>\n<p><strong>Email:<\/strong>\u00a01007788887@qq.com<\/p>\n<p><a href=\"https:\/\/www.720yun.com\/vr\/a6ajt7ynrw0\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1480\" src=\"http:\/\/www.songhaiflanges.com\/wp-content\/uploads\/2026\/04\/4-1.webp\" alt=\"\" width=\"1290\" height=\"2317\" srcset=\"https:\/\/www.songhaiflanges.com\/wp-content\/uploads\/2026\/04\/4-1.webp 1290w, https:\/\/www.songhaiflanges.com\/wp-content\/uploads\/2026\/04\/4-1-167x300.webp 167w, https:\/\/www.songhaiflanges.com\/wp-content\/uploads\/2026\/04\/4-1-570x1024.webp 570w, https:\/\/www.songhaiflanges.com\/wp-content\/uploads\/2026\/04\/4-1-768x1379.webp 768w, https:\/\/www.songhaiflanges.com\/wp-content\/uploads\/2026\/04\/4-1-855x1536.webp 855w, https:\/\/www.songhaiflanges.com\/wp-content\/uploads\/2026\/04\/4-1-1140x2048.webp 1140w, https:\/\/www.songhaiflanges.com\/wp-content\/uploads\/2026\/04\/4-1-7x12.webp 7w\" sizes=\"auto, (max-width: 1290px) 100vw, 1290px\" \/><\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>High-Pressure Flange Selection: Class 900-2500 Published: April 10, 2026 | Category: Technical Guide What Is High-Pressure? Low: Class 150, 300 (up to 720&#8230;<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"default","_kad_post_title":"default","_kad_post_layout":"default","_kad_post_sidebar_id":"","_kad_post_content_style":"default","_kad_post_vertical_padding":"default","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[1],"tags":[137,138,136,134,135,104],"class_list":["post-1501","post","type-post","status-publish","format-standard","hentry","category-3-news","tag-class-1500","tag-class-2500","tag-class-900","tag-high-pressure","tag-rtj","tag-weld-neck"],"_links":{"self":[{"href":"https:\/\/www.songhaiflanges.com\/fr\/wp-json\/wp\/v2\/posts\/1501","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.songhaiflanges.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.songhaiflanges.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.songhaiflanges.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.songhaiflanges.com\/fr\/wp-json\/wp\/v2\/comments?post=1501"}],"version-history":[{"count":3,"href":"https:\/\/www.songhaiflanges.com\/fr\/wp-json\/wp\/v2\/posts\/1501\/revisions"}],"predecessor-version":[{"id":1509,"href":"https:\/\/www.songhaiflanges.com\/fr\/wp-json\/wp\/v2\/posts\/1501\/revisions\/1509"}],"wp:attachment":[{"href":"https:\/\/www.songhaiflanges.com\/fr\/wp-json\/wp\/v2\/media?parent=1501"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.songhaiflanges.com\/fr\/wp-json\/wp\/v2\/categories?post=1501"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.songhaiflanges.com\/fr\/wp-json\/wp\/v2\/tags?post=1501"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}