{"id":1044,"date":"2026-04-22T03:38:25","date_gmt":"2026-04-22T07:38:25","guid":{"rendered":"https:\/\/www.songhaiflange.com\/?p=1044"},"modified":"2026-04-22T20:20:55","modified_gmt":"2026-04-23T00:20:55","slug":"low-temperature-flange-materials-lng-cryogenic-service-selection-guide","status":"publish","type":"post","link":"https:\/\/www.songhaiflange.com\/fr\/2026\/04\/22\/low-temperature-flange-materials-lng-cryogenic-service-selection-guide\/","title":{"rendered":"Mat\u00e9riaux pour brides \u00e0 basse temp\u00e9rature Guide de s\u00e9lection pour le service cryog\u00e9nique GNL"},"content":{"rendered":"<h2>Guide des mat\u00e9riaux pour brides \u00e0 basse temp\u00e9rature<\/h2>\n<p>Les applications cryog\u00e9niques et \u00e0 basse temp\u00e9rature requi\u00e8rent des mat\u00e9riaux sp\u00e9ciaux pour \u00e9viter les ruptures fragiles et garantir un fonctionnement s\u00fbr dans des conditions de froid extr\u00eame.<\/p>\n<h3>Classification des temp\u00e9ratures<\/h3>\n<table>\n<tr>\n<th>Cat\u00e9gorie<\/th>\n<th>Plage de temp\u00e9rature<\/th>\n<th>Applications typiques<\/th>\n<\/tr>\n<tr>\n<td>Ambiant<\/td>\n<td>De -20\u00b0C \u00e0 50\u00b0C<\/td>\n<td>Tuyauterie standard<\/td>\n<\/tr>\n<tr>\n<td>Basse temp\u00e9rature<\/td>\n<td>De -46\u00b0C \u00e0 -20\u00b0C<\/td>\n<td>R\u00e9frig\u00e9ration, GPL<\/td>\n<\/tr>\n<tr>\n<td>Cryog\u00e9nique<\/td>\n<td>De -196\u00b0C \u00e0 -46\u00b0C<\/td>\n<td>GNL, azote liquide<\/td>\n<\/tr>\n<tr>\n<td>Cryog\u00e9nie profonde<\/td>\n<td>Inf\u00e9rieur \u00e0 -196\u00b0C<\/td>\n<td>H\u00e9lium liquide, hydrog\u00e8ne<\/td>\n<\/tr>\n<\/table>\n<h3>Crit\u00e8res de s\u00e9lection des mat\u00e9riaux<\/h3>\n<h4>Acier au carbone pour basses temp\u00e9ratures<\/h4>\n<ul>\n<li><strong>ASTM A350 LF2 :<\/strong> Service jusqu'\u00e0 -46\u00b0C (-50\u00b0F)<\/li>\n<li><strong>ASTM A350 LF3 :<\/strong> Service jusqu'\u00e0 -101\u00b0C (-150\u00b0F)<\/li>\n<li>Essai d'impact Charpy V-notch requis<\/li>\n<li>Rentable pour les basses temp\u00e9ratures mod\u00e9r\u00e9es<\/li>\n<\/ul>\n<h4>Acier inoxydable pour service cryog\u00e9nique<\/h4>\n<ul>\n<li><strong>304\/304L :<\/strong> Excellent jusqu'\u00e0 -196\u00b0C (temp\u00e9rature LN2)<\/li>\n<li><strong>316\/316L :<\/strong> R\u00e9sistance sup\u00e9rieure \u00e0 la corrosion \u00e0 basse temp\u00e9rature<\/li>\n<li><strong>321:<\/strong> Qualit\u00e9 stabilis\u00e9e pour les composants soud\u00e9s<\/li>\n<li>La structure aust\u00e9nitique reste ductile \u00e0 des temp\u00e9ratures cryog\u00e9niques<\/li>\n<\/ul>\n<h4>Alliages sp\u00e9ciaux pour le froid extr\u00eame<\/h4>\n<ul>\n<li><strong>310 Inox :<\/strong> Jusqu'\u00e0 1150\u00b0C, bon pour les cycles de temp\u00e9rature<\/li>\n<li><strong>Inconel 625 :<\/strong> Service GNL et hydrog\u00e8ne liquide<\/li>\n<li><strong>Alliages d'aluminium :<\/strong> Applications cryog\u00e9niques l\u00e9g\u00e8res<\/li>\n<\/ul>\n<h3>Exigences de l'industrie du GNL<\/h3>\n<p>Le gaz naturel liqu\u00e9fi\u00e9 (GNL) est stock\u00e9 et transport\u00e9 \u00e0 -162\u00b0C (-260\u00b0F), ce qui n\u00e9cessite des mat\u00e9riaux sp\u00e9cialis\u00e9s :<\/p>\n<ul>\n<li>Aciers inoxydables aust\u00e9nitiques (304L, 316L)<\/li>\n<li>9% Acier au nickel pour r\u00e9servoirs de stockage<\/li>\n<li>Alliages d'aluminium pour \u00e9changeurs de chaleur<\/li>\n<li>Joints sp\u00e9ciaux et mat\u00e9riaux d'\u00e9tanch\u00e9it\u00e9<\/li>\n<\/ul>\n<h3>Principales propri\u00e9t\u00e9s des mat\u00e9riaux<\/h3>\n<h4>Transition entre ductilit\u00e9 et fragilit\u00e9<\/h4>\n<p>Les aciers au carbone subissent une transition entre ductilit\u00e9 et fragilit\u00e9 \u00e0 basse temp\u00e9rature. En dessous de la temp\u00e9rature de transition, le mat\u00e9riau devient susceptible de se rompre de mani\u00e8re fragile.<\/p>\n<h4>Exigences en mati\u00e8re d'essais d'impact<\/h4>\n<ul>\n<li>Essai Charpy d'entaille en V \u00e0 la temp\u00e9rature de conception<\/li>\n<li>\u00c9nergie d'impact minimale : 20 joules (15 ft-lbs) typiques<\/li>\n<li>Exigences en mati\u00e8re d'expansion lat\u00e9rale conform\u00e9ment \u00e0 la norme ASME B31.3<\/li>\n<\/ul>\n<h3>Consid\u00e9rations relatives \u00e0 la conception<\/h3>\n<ol>\n<li><strong>Contraction thermique :<\/strong> Tenir compte du retrait des mat\u00e9riaux \u00e0 basse temp\u00e9rature<\/li>\n<li><strong>Isolation :<\/strong> Emp\u00eacher la p\u00e9n\u00e9tration de la chaleur et le givrage externe<\/li>\n<li><strong>Syst\u00e8mes de soutien :<\/strong> Permettre les mouvements thermiques<\/li>\n<li><strong>S\u00e9lection de joints :<\/strong> Utiliser des joints cryog\u00e9niques (spirale, PTFE).<\/li>\n<li><strong>Boulonnage :<\/strong> Boulonnage \u00e0 basse temp\u00e9rature (ASTM A320 L7, L7M)<\/li>\n<\/ol>\n<h3>Applications courantes<\/h3>\n<ul>\n<li><strong>Installations de GNL :<\/strong> Liqu\u00e9faction, stockage, regaz\u00e9ification<\/li>\n<li><strong>S\u00e9paration de l'air :<\/strong> Production d'oxyg\u00e8ne, d'azote et d'argon liquides<\/li>\n<li><strong>P\u00e9trochimie :<\/strong> Usines d'\u00e9thyl\u00e8ne et de propyl\u00e8ne<\/li>\n<li><strong>Industrie alimentaire :<\/strong> Cong\u00e9lation cryog\u00e9nique<\/li>\n<li><strong>M\u00e9dical :<\/strong> Stockage d'azote liquide<\/li>\n<\/ul>\n<h3>Normes et codes<\/h3>\n<ul>\n<li>ASME B31.3 : tuyauterie de processus (chapitre IX : basse temp\u00e9rature)<\/li>\n<li>ASME B16.5 : Exigences en mati\u00e8re de boulonnage \u00e0 basse temp\u00e9rature<\/li>\n<li>ASTM A350 : Pi\u00e8ces forg\u00e9es en acier au carbone \u00e0 basse temp\u00e9rature<\/li>\n<li>EN 1092-1 : Normes europ\u00e9ennes pour les brides cryog\u00e9niques<\/li>\n<li>BS 6364 : Vannes \u00e0 basse temp\u00e9rature<\/li>\n<\/ul>\n<h3>Inspection et essais<\/h3>\n<ul>\n<li>100% inspection visuelle<\/li>\n<li>Contr\u00f4le par magn\u00e9toscopie ou ressuage<\/li>\n<li>Essais d'impact par lot de traitement thermique<\/li>\n<li>Essai hydrostatique \u00e0 temp\u00e9rature ambiante<\/li>\n<\/ul>\n<p>La s\u00e9lection correcte des mat\u00e9riaux pour les services \u00e0 basse temp\u00e9rature est essentielle pour \u00e9viter les d\u00e9faillances catastrophiques. Il convient de toujours consulter les codes applicables et de prendre en compte la conception compl\u00e8te du syst\u00e8me lors de la sp\u00e9cification des brides cryog\u00e9niques.<\/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\" target=\"_blank\" rel=\"noopener\"><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\" title=\"\" 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>Low Temperature Flange Materials Guide Cryogenic and low-temperature applications require special material considerations to prevent brittle fracture and ensure safe operation in extreme cold conditions. Temperature Classifications Category Temperature Range Typical Applications Ambient -20\u00b0C to 50\u00b0C Standard process piping Low Temperature -46\u00b0C to -20\u00b0C Refrigeration, LPG Cryogenic -196\u00b0C to -46\u00b0C LNG, liquid nitrogen Deep Cryogenic [&hellip;]<\/p>\n","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":[77,66,89,78],"class_list":["post-1044","post","type-post","status-publish","format-standard","hentry","category-blog","tag-carbon","tag-flange","tag-pn16","tag-stainless"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.songhaiflange.com\/fr\/wp-json\/wp\/v2\/posts\/1044","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=1044"}],"version-history":[{"count":2,"href":"https:\/\/www.songhaiflange.com\/fr\/wp-json\/wp\/v2\/posts\/1044\/revisions"}],"predecessor-version":[{"id":1054,"href":"https:\/\/www.songhaiflange.com\/fr\/wp-json\/wp\/v2\/posts\/1044\/revisions\/1054"}],"wp:attachment":[{"href":"https:\/\/www.songhaiflange.com\/fr\/wp-json\/wp\/v2\/media?parent=1044"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.songhaiflange.com\/fr\/wp-json\/wp\/v2\/categories?post=1044"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.songhaiflange.com\/fr\/wp-json\/wp\/v2\/tags?post=1044"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}