{"id":1476,"date":"2026-04-10T02:06:52","date_gmt":"2026-04-10T09:06:52","guid":{"rendered":"https:\/\/www.songhaiflanges.com\/?p=1476"},"modified":"2026-04-10T02:22:40","modified_gmt":"2026-04-10T09:22:40","slug":"flange-installation-best-practices-bolt-torque-gasket-selection-leak-prevention","status":"publish","type":"post","link":"https:\/\/www.songhaiflanges.com\/de\/flange-installation-best-practices-bolt-torque-gasket-selection-leak-prevention\/","title":{"rendered":"Flange Installation Best Practices: Bolt Torque, Gasket Selection, Leak Prevention"},"content":{"rendered":"<h2>Flange Installation Best Practices<\/h2>\n<p><strong>Published:<\/strong> April 10, 2026 | <strong>Category:<\/strong> Technical Guide<\/p>\n<h3>Introduction<\/h3>\n<p>60-70% of flange leaks are caused by improper installation, not manufacturing defects.<\/p>\n<h3>Pre-Installation Inspection<\/h3>\n<ul>\n<li>Flanges: No cracks, smooth surface<\/li>\n<li>Gaskets: Correct material and size<\/li>\n<li>Bolts: Correct grade, no damage<\/li>\n<li>Piping: Proper alignment<\/li>\n<\/ul>\n<h3>Gasket Selection<\/h3>\n<p><strong>Non-Metallic:<\/strong> NAF, PTFE, Graphite<br \/>\n<strong>Semi-Metallic:<\/strong> Spiral Wound, Camprofile<br \/>\n<strong>Metallic:<\/strong> Ring Joint (RTJ)<\/p>\n<h3>Bolt Torque Sequence<\/h3>\n<p>Pass 1: 30% (snug) \u2192 Pass 2: 60% \u2192 Pass 3: 100% (star pattern) \u2192 Pass 4: 100% (circular)<\/p>\n<h3>Common Mistakes<\/h3>\n<ul>\n<li>Wrong gasket material<\/li>\n<li>Reusing old gaskets<\/li>\n<li>Over\/under-torquing<\/li>\n<li>Uneven torque<\/li>\n<li>Dirty flange faces<\/li>\n<\/ul>\n<h3>Recommended Torque (A193 B7)<\/h3>\n<table>\n<tr>\n<th>Size<\/th>\n<th>Class<\/th>\n<th>Torque (ft-lbs)<\/th>\n<\/tr>\n<tr>\n<td>2&#8243;<\/td>\n<td>150#<\/td>\n<td>95<\/td>\n<\/tr>\n<tr>\n<td>4&#8243;<\/td>\n<td>300#<\/td>\n<td>165<\/td>\n<\/tr>\n<tr>\n<td>6&#8243;<\/td>\n<td>300#<\/td>\n<td>260<\/td>\n<\/tr>\n<tr>\n<td>12&#8243;<\/td>\n<td>300#<\/td>\n<td>570<\/td>\n<\/tr>\n<\/table>\n<p><strong>Songhai provides torque specs and installation support!<\/strong><\/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>Flange Installation Best Practices Published: April 10, 2026 | Category: Technical Guide Introduction 60-70% of flange leaks are caused by improper installation, not&#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":[114,115,113,116],"class_list":["post-1476","post","type-post","status-publish","format-standard","hentry","category-3-news","tag-bolt-torque","tag-gasket","tag-installation","tag-maintenance"],"_links":{"self":[{"href":"https:\/\/www.songhaiflanges.com\/de\/wp-json\/wp\/v2\/posts\/1476","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.songhaiflanges.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.songhaiflanges.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.songhaiflanges.com\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.songhaiflanges.com\/de\/wp-json\/wp\/v2\/comments?post=1476"}],"version-history":[{"count":4,"href":"https:\/\/www.songhaiflanges.com\/de\/wp-json\/wp\/v2\/posts\/1476\/revisions"}],"predecessor-version":[{"id":1488,"href":"https:\/\/www.songhaiflanges.com\/de\/wp-json\/wp\/v2\/posts\/1476\/revisions\/1488"}],"wp:attachment":[{"href":"https:\/\/www.songhaiflanges.com\/de\/wp-json\/wp\/v2\/media?parent=1476"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.songhaiflanges.com\/de\/wp-json\/wp\/v2\/categories?post=1476"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.songhaiflanges.com\/de\/wp-json\/wp\/v2\/tags?post=1476"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}