{"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\/de\/2026\/04\/22\/low-temperature-flange-materials-lng-cryogenic-service-selection-guide\/","title":{"rendered":"Low Temperature Flange Materials LNG Cryogenic Service Selection Guide"},"content":{"rendered":"<h2>Low Temperature Flange Materials Guide<\/h2>\n<p>Cryogenic and low-temperature applications require special material considerations to prevent brittle fracture and ensure safe operation in extreme cold conditions.<\/p>\n<h3>Temperature Classifications<\/h3>\n<table>\n<tr>\n<th>Category<\/th>\n<th>Temperature Range<\/th>\n<th>Typical Applications<\/th>\n<\/tr>\n<tr>\n<td>Ambient<\/td>\n<td>-20\u00b0C to 50\u00b0C<\/td>\n<td>Standard process piping<\/td>\n<\/tr>\n<tr>\n<td>Low Temperature<\/td>\n<td>-46\u00b0C to -20\u00b0C<\/td>\n<td>Refrigeration, LPG<\/td>\n<\/tr>\n<tr>\n<td>Cryogenic<\/td>\n<td>-196\u00b0C to -46\u00b0C<\/td>\n<td>LNG, liquid nitrogen<\/td>\n<\/tr>\n<tr>\n<td>Deep Cryogenic<\/td>\n<td>Below -196\u00b0C<\/td>\n<td>Liquid helium, hydrogen<\/td>\n<\/tr>\n<\/table>\n<h3>Material Selection Criteria<\/h3>\n<h4>Carbon Steel for Low Temperature<\/h4>\n<ul>\n<li><strong>ASTM A350 LF2:<\/strong> Service down to -46\u00b0C (-50\u00b0F)<\/li>\n<li><strong>ASTM A350 LF3:<\/strong> Service down to -101\u00b0C (-150\u00b0F)<\/li>\n<li>Charpy V-notch impact testing required<\/li>\n<li>Cost-effective for moderate low temperatures<\/li>\n<\/ul>\n<h4>Stainless Steel for Cryogenic Service<\/h4>\n<ul>\n<li><strong>304\/304L:<\/strong> Excellent down to -196\u00b0C (LN2 temperature)<\/li>\n<li><strong>316\/316L:<\/strong> Superior corrosion resistance at low temps<\/li>\n<li><strong>321:<\/strong> Stabilized grade for welded components<\/li>\n<li>Austenitic structure remains ductile at cryogenic temperatures<\/li>\n<\/ul>\n<h4>Special Alloys for Extreme Cold<\/h4>\n<ul>\n<li><strong>310 Stainless:<\/strong> Up to 1150\u00b0C, good for temperature cycling<\/li>\n<li><strong>Inconel 625:<\/strong> LNG and liquid hydrogen service<\/li>\n<li><strong>Aluminum Alloys:<\/strong> Lightweight cryogenic applications<\/li>\n<\/ul>\n<h3>LNG Industry Requirements<\/h3>\n<p>Liquefied Natural Gas (LNG) is stored and transported at -162\u00b0C (-260\u00b0F), requiring specialized materials:<\/p>\n<ul>\n<li>Austenitic stainless steels (304L, 316L)<\/li>\n<li>9% Nickel steel for storage tanks<\/li>\n<li>Aluminum alloys for heat exchangers<\/li>\n<li>Special gaskets and sealing materials<\/li>\n<\/ul>\n<h3>Key Material Properties<\/h3>\n<h4>Ductile-to-Brittle Transition<\/h4>\n<p>Carbon steels undergo a ductile-to-brittle transition at low temperatures. Below the transition temperature, the material becomes susceptible to brittle fracture.<\/p>\n<h4>Impact Testing Requirements<\/h4>\n<ul>\n<li>Charpy V-notch testing at design temperature<\/li>\n<li>Minimum impact energy: 20 Joules (15 ft-lbs) typical<\/li>\n<li>Lateral expansion requirements per ASME B31.3<\/li>\n<\/ul>\n<h3>Design Considerations<\/h3>\n<ol>\n<li><strong>Thermal Contraction:<\/strong> Account for material shrinkage at low temperatures<\/li>\n<li><strong>Insulation:<\/strong> Prevent heat ingress and external frosting<\/li>\n<li><strong>Support Systems:<\/strong> Allow for thermal movement<\/li>\n<li><strong>Gasket Selection:<\/strong> Use cryogenic-rated gaskets (spiral wound, PTFE)<\/li>\n<li><strong>Bolting:<\/strong> Low-temperature bolting (ASTM A320 L7, L7M)<\/li>\n<\/ol>\n<h3>Common Applications<\/h3>\n<ul>\n<li><strong>LNG Facilities:<\/strong> Liquefaction, storage, regasification<\/li>\n<li><strong>Air Separation:<\/strong> Liquid oxygen, nitrogen, argon production<\/li>\n<li><strong>Petrochemical:<\/strong> Ethylene, propylene plants<\/li>\n<li><strong>Food Industry:<\/strong> Cryogenic freezing<\/li>\n<li><strong>Medical:<\/strong> Liquid nitrogen storage<\/li>\n<\/ul>\n<h3>Standards and Codes<\/h3>\n<ul>\n<li>ASME B31.3: Process piping (Chapter IX: Low Temperature)<\/li>\n<li>ASME B16.5: Low temperature bolting requirements<\/li>\n<li>ASTM A350: Low temperature carbon steel forgings<\/li>\n<li>EN 1092-1: European cryogenic flange standards<\/li>\n<li>BS 6364: Low temperature valves<\/li>\n<\/ul>\n<h3>Inspection and Testing<\/h3>\n<ul>\n<li>100% visual inspection<\/li>\n<li>Magnetic particle or dye penetrant testing<\/li>\n<li>Impact testing per heat treatment lot<\/li>\n<li>Hydrostatic testing at ambient temperature<\/li>\n<\/ul>\n<p>Proper material selection for low-temperature service is critical for preventing catastrophic failures. Always consult applicable codes and consider the complete system design when specifying cryogenic flanges.<\/p>\n<p><strong>WhatsApp:<\/strong>\u00a0+86-18658777855<br \/>\n<strong>E-Mail:<\/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>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>","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\/de\/wp-json\/wp\/v2\/posts\/1044","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.songhaiflange.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.songhaiflange.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.songhaiflange.com\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.songhaiflange.com\/de\/wp-json\/wp\/v2\/comments?post=1044"}],"version-history":[{"count":2,"href":"https:\/\/www.songhaiflange.com\/de\/wp-json\/wp\/v2\/posts\/1044\/revisions"}],"predecessor-version":[{"id":1054,"href":"https:\/\/www.songhaiflange.com\/de\/wp-json\/wp\/v2\/posts\/1044\/revisions\/1054"}],"wp:attachment":[{"href":"https:\/\/www.songhaiflange.com\/de\/wp-json\/wp\/v2\/media?parent=1044"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.songhaiflange.com\/de\/wp-json\/wp\/v2\/categories?post=1044"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.songhaiflange.com\/de\/wp-json\/wp\/v2\/tags?post=1044"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}