{"id":976,"date":"2026-04-12T23:09:01","date_gmt":"2026-04-13T03:09:01","guid":{"rendered":"https:\/\/www.songhaiflange.com\/?p=976"},"modified":"2026-04-12T23:20:09","modified_gmt":"2026-04-13T03:20:09","slug":"flange-bolt-torque-values-complete-reference-chart-for-asme-b16-5","status":"publish","type":"post","link":"https:\/\/www.songhaiflange.com\/fr\/2026\/04\/12\/flange-bolt-torque-values-complete-reference-chart-for-asme-b16-5\/","title":{"rendered":"Valeurs de couple des boulons de bride - Tableau de r\u00e9f\u00e9rence complet pour ASME B16.5"},"content":{"rendered":"<h2>Why Proper Flange Bolt Torque Prevents Costly Leaks<\/h2>\n<p>Incorrect bolt torque is a leading cause of flange joint failures. Applying correct torque ensures proper gasket compression and prevents shutdowns and safety incidents.<\/p>\n<h2>Target Torque Calculation Formula<\/h2>\n<p>ASME PCC-1 Appendix K formula: <strong>T = K x D x F \/ N<\/strong><\/p>\n<ul>\n<li>T = Target torque per bolt<\/li>\n<li>K = Nut factor (thread friction)<\/li>\n<li>D = Nominal bolt diameter<\/li>\n<li>F = Total bolt load required<\/li>\n<li>N = Number of bolts<\/li>\n<\/ul>\n<h3>Nut Factor Values<\/h3>\n<ul>\n<li>Unlubricated carbon steel: K = 0.20<\/li>\n<li>Moly-based lubricant: K = 0.13-0.15<\/li>\n<li>PTFE-coated studs: K = 0.10<\/li>\n<\/ul>\n<h2>Reference Torque Values (Lubricated Threads)<\/h2>\n<h3>Class 150 Flanges<\/h3>\n<table border=\"1\" cellpadding=\"8\">\n<tr>\n<th>NPS<\/th>\n<th>Bolt Size<\/th>\n<th>Bolts<\/th>\n<th>Torque (ft-lbs)<\/th>\n<\/tr>\n<tr>\n<td>1\/2<\/td>\n<td>1\/2-13<\/td>\n<td>4<\/td>\n<td>15<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>5\/8-11<\/td>\n<td>4<\/td>\n<td>25<\/td>\n<\/tr>\n<tr>\n<td>6<\/td>\n<td>3\/4-10<\/td>\n<td>8<\/td>\n<td>45<\/td>\n<\/tr>\n<tr>\n<td>8<\/td>\n<td>7\/8-9<\/td>\n<td>8<\/td>\n<td>60<\/td>\n<\/tr>\n<tr>\n<td>12<\/td>\n<td>7\/8-9<\/td>\n<td>12<\/td>\n<td>60<\/td>\n<\/tr>\n<\/table>\n<h3>Class 300 Flanges<\/h3>\n<table border=\"1\" cellpadding=\"8\">\n<tr>\n<th>NPS<\/th>\n<th>Bolt Size<\/th>\n<th>Bolts<\/th>\n<th>Torque (ft-lbs)<\/th>\n<\/tr>\n<tr>\n<td>1\/2<\/td>\n<td>1\/2-13<\/td>\n<td>4<\/td>\n<td>20<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>3\/4-10<\/td>\n<td>4<\/td>\n<td>45<\/td>\n<\/tr>\n<tr>\n<td>6<\/td>\n<td>7\/8-9<\/td>\n<td>8<\/td>\n<td>90<\/td>\n<\/tr>\n<tr>\n<td>8<\/td>\n<td>1-8<\/td>\n<td>8<\/td>\n<td>120<\/td>\n<\/tr>\n<tr>\n<td>12<\/td>\n<td>1-1\/8-8<\/td>\n<td>12<\/td>\n<td>160<\/td>\n<\/tr>\n<\/table>\n<h2>4-Pass Tightening Procedure<\/h2>\n<ol>\n<li>Pass 1: Star pattern at 30% torque<\/li>\n<li>Pass 2: Star pattern at 60% torque<\/li>\n<li>Pass 3: Star pattern at 100% torque<\/li>\n<li>Pass 4: Circular pattern at 100% until no rotation<\/li>\n<\/ol>\n<h2>Common Mistakes<\/h2>\n<ul>\n<li>No lubricant on studs<\/li>\n<li>Skipping multi-pass sequence<\/li>\n<li>Mixing bolt grades<\/li>\n<li>R\u00e9utilisation d'anciens joints<\/li>\n<\/ul>\n<p><strong>Contact Songhai Flange<\/strong> for torque specifications and technical documentation.<\/p>\n<p><strong>WhatsApp :<\/strong>\u00a0+86-18658777855<br \/>\n<strong>Courriel :<\/strong>\u00a01007788887@qq.com<br \/>\n<a href=\"https:\/\/www.720yun.com\/vr\/a6ajt7ynrw0\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-884\" src=\"http:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4.webp\" alt=\"\" width=\"1290\" height=\"2317\" srcset=\"https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4.webp 1290w, https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4-167x300.webp 167w, https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4-570x1024.webp 570w, https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4-768x1379.webp 768w, https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4-855x1536.webp 855w, https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4-1140x2048.webp 1140w, https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4-7x12.webp 7w, https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4-416x747.webp 416w\" sizes=\"auto, (max-width: 1290px) 100vw, 1290px\" \/><\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Pourquoi un couple de serrage correct des boulons de bride permet d'\u00e9viter des fuites co\u00fbteuses Un couple de serrage incorrect est l'une des principales causes de d\u00e9faillance des joints de bride. L'application d'un couple correct garantit une compression correcte du joint et \u00e9vite les arr\u00eats d'exploitation et les incidents de s\u00e9curit\u00e9. Formule de calcul du couple cible Formule de l'annexe K de l'ASME PCC-1 : T = K x D x F \/ N T = Couple cible par [...]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-976","post","type-post","status-publish","format-standard","hentry","category-blog"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.songhaiflange.com\/fr\/wp-json\/wp\/v2\/posts\/976","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.songhaiflange.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.songhaiflange.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.songhaiflange.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.songhaiflange.com\/fr\/wp-json\/wp\/v2\/comments?post=976"}],"version-history":[{"count":2,"href":"https:\/\/www.songhaiflange.com\/fr\/wp-json\/wp\/v2\/posts\/976\/revisions"}],"predecessor-version":[{"id":988,"href":"https:\/\/www.songhaiflange.com\/fr\/wp-json\/wp\/v2\/posts\/976\/revisions\/988"}],"wp:attachment":[{"href":"https:\/\/www.songhaiflange.com\/fr\/wp-json\/wp\/v2\/media?parent=976"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.songhaiflange.com\/fr\/wp-json\/wp\/v2\/categories?post=976"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.songhaiflange.com\/fr\/wp-json\/wp\/v2\/tags?post=976"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}