{"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\/vi\/2026\/04\/22\/low-temperature-flange-materials-lng-cryogenic-service-selection-guide\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u m\u1eb7t b\u00edch cho \u1ee9ng d\u1ee5ng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p trong h\u1ec7 th\u1ed1ng LNG"},"content":{"rendered":"<h2>H\u01b0\u1edbng d\u1eabn v\u1ec1 v\u1eadt li\u1ec7u m\u1eb7t b\u00edch ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 th\u1ea5p<\/h2>\n<p>C\u00e1c \u1ee9ng d\u1ee5ng trong l\u0129nh v\u1ef1c nhi\u1ec7t \u0111\u1ed9 c\u1ef1c th\u1ea5p v\u00e0 nhi\u1ec7t \u0111\u1ed9 th\u1ea5p \u0111\u00f2i h\u1ecfi ph\u1ea3i c\u00f3 nh\u1eefng c\u00e2n nh\u1eafc \u0111\u1eb7c bi\u1ec7t v\u1ec1 v\u1eadt li\u1ec7u nh\u1eb1m ng\u0103n ng\u1eeba hi\u1ec7n t\u01b0\u1ee3ng g\u00e3y gi\u00f2n v\u00e0 \u0111\u1ea3m b\u1ea3o v\u1eadn h\u00e0nh an to\u00e0n trong \u0111i\u1ec1u ki\u1ec7n l\u1ea1nh gi\u00e1 kh\u1eafc nghi\u1ec7t.<\/p>\n<h3>Ph\u00e2n lo\u1ea1i nhi\u1ec7t \u0111\u1ed9<\/h3>\n<table>\n<tr>\n<th>Danh m\u1ee5c<\/th>\n<th>Ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9<\/th>\n<th>C\u00e1c \u1ee9ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh<\/th>\n<\/tr>\n<tr>\n<td>\u00c2m thanh m\u00f4i tr\u01b0\u1eddng<\/td>\n<td>-20\u00b0C \u0111\u1ebfn 50\u00b0C<\/td>\n<td>H\u1ec7 th\u1ed1ng \u1ed1ng d\u1eabn ti\u00eau chu\u1ea9n<\/td>\n<\/tr>\n<tr>\n<td>Nhi\u1ec7t \u0111\u1ed9 th\u1ea5p<\/td>\n<td>-46\u00b0C \u0111\u1ebfn -20\u00b0C<\/td>\n<td>L\u00e0m l\u1ea1nh, LPG<\/td>\n<\/tr>\n<tr>\n<td>Si\u00eau l\u1ea1nh<\/td>\n<td>-196\u00b0C \u0111\u1ebfn -46\u00b0C<\/td>\n<td>LNG, nit\u01a1 l\u1ecfng<\/td>\n<\/tr>\n<tr>\n<td>L\u1ea1nh s\u00e2u<\/td>\n<td>D\u01b0\u1edbi -196\u00b0C<\/td>\n<td>Heli l\u1ecfng, hydro<\/td>\n<\/tr>\n<\/table>\n<h3>Ti\u00eau ch\u00ed l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u<\/h3>\n<h4>Th\u00e9p cacbon d\u00f9ng cho nhi\u1ec7t \u0111\u1ed9 th\u1ea5p<\/h4>\n<ul>\n<li><strong>ASTM A350 LF2:<\/strong> Ho\u1ea1t \u0111\u1ed9ng \u1edf nhi\u1ec7t \u0111\u1ed9 xu\u1ed1ng t\u1edbi -46\u00b0C (-50\u00b0F)<\/li>\n<li><strong>ASTM A350 LF3:<\/strong> Ho\u1ea1t \u0111\u1ed9ng \u1edf nhi\u1ec7t \u0111\u1ed9 xu\u1ed1ng t\u1edbi -101\u00b0C (-150\u00b0F)<\/li>\n<li>Y\u00eau c\u1ea7u th\u1eed nghi\u1ec7m va \u0111\u1eadp Charpy v\u1edbi r\u00e3nh ch\u1eef V<\/li>\n<li>Hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed trong \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 th\u1ea5p v\u1eeba ph\u1ea3i<\/li>\n<\/ul>\n<h4>Th\u00e9p kh\u00f4ng g\u1ec9 d\u00f9ng trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 c\u1ef1c th\u1ea5p<\/h4>\n<ul>\n<li><strong>304\/304L:<\/strong> Ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 \u1edf nhi\u1ec7t \u0111\u1ed9 xu\u1ed1ng t\u1edbi -196\u00b0C (nhi\u1ec7t \u0111\u1ed9 c\u1ee7a nit\u01a1 l\u1ecfng)<\/li>\n<li><strong>316\/316L:<\/strong> Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u01b0\u1ee3t tr\u1ed9i \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p<\/li>\n<li><strong>321:<\/strong> Lo\u1ea1i th\u00e9p \u1ed5n \u0111\u1ecbnh d\u00e0nh cho c\u00e1c chi ti\u1ebft h\u00e0n<\/li>\n<li>C\u1ea5u tr\u00fac austenit v\u1eabn gi\u1eef \u0111\u01b0\u1ee3c t\u00ednh d\u1ebbo \u1edf nhi\u1ec7t \u0111\u1ed9 si\u00eau l\u1ea1nh<\/li>\n<\/ul>\n<h4>H\u1ee3p kim \u0111\u1eb7c bi\u1ec7t d\u00f9ng trong \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 c\u1ef1c th\u1ea5p<\/h4>\n<ul>\n<li><strong>Th\u00e9p kh\u00f4ng g\u1ec9 310:<\/strong> L\u00ean \u0111\u1ebfn 1150\u00b0C, th\u00edch h\u1ee3p cho qu\u00e1 tr\u00ecnh thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9<\/li>\n<li><strong>Inconel 625:<\/strong> D\u1ecbch v\u1ee5 kh\u00ed t\u1ef1 nhi\u00ean h\u00f3a l\u1ecfng (LNG) v\u00e0 hydro l\u1ecfng<\/li>\n<li><strong>H\u1ee3p kim nh\u00f4m:<\/strong> C\u00e1c \u1ee9ng d\u1ee5ng nhi\u1ec7t \u0111\u1ed9 c\u1ef1c th\u1ea5p trong l\u0129nh v\u1ef1c thi\u1ebft b\u1ecb nh\u1eb9<\/li>\n<\/ul>\n<h3>Y\u00eau c\u1ea7u c\u1ee7a ng\u00e0nh c\u00f4ng nghi\u1ec7p kh\u00ed t\u1ef1 nhi\u00ean h\u00f3a l\u1ecfng (LNG)<\/h3>\n<p>Kh\u00ed thi\u00ean nhi\u00ean h\u00f3a l\u1ecfng (LNG) \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef v\u00e0 v\u1eadn chuy\u1ec3n \u1edf nhi\u1ec7t \u0111\u1ed9 -162\u00b0C (-260\u00b0F), do \u0111\u00f3 c\u1ea7n ph\u1ea3i s\u1eed d\u1ee5ng c\u00e1c v\u1eadt li\u1ec7u chuy\u00ean d\u1ee5ng:<\/p>\n<ul>\n<li>Th\u00e9p kh\u00f4ng g\u1ec9 austenit (304L, 316L)<\/li>\n<li>Th\u00e9p niken 9% d\u00f9ng cho b\u1ed3n ch\u1ee9a<\/li>\n<li>H\u1ee3p kim nh\u00f4m d\u00f9ng cho b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t<\/li>\n<li>C\u00e1c lo\u1ea1i gio\u0103ng v\u00e0 v\u1eadt li\u1ec7u l\u00e0m k\u00edn \u0111\u1eb7c bi\u1ec7t<\/li>\n<\/ul>\n<h3>C\u00e1c t\u00ednh ch\u1ea5t ch\u00ednh c\u1ee7a v\u1eadt li\u1ec7u<\/h3>\n<h4>S\u1ef1 chuy\u1ec3n ti\u1ebfp t\u1eeb d\u1ebbo sang gi\u00f2n<\/h4>\n<p>Th\u00e9p cacbon tr\u1ea3i qua qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i t\u1eeb d\u1ebbo sang gi\u00f2n \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p. D\u01b0\u1edbi nhi\u1ec7t \u0111\u1ed9 chuy\u1ec3n \u0111\u1ed5i, v\u1eadt li\u1ec7u d\u1ec5 b\u1ecb g\u00e3y gi\u00f2n.<\/p>\n<h4>Y\u00eau c\u1ea7u v\u1ec1 th\u1eed nghi\u1ec7m va \u0111\u1eadp<\/h4>\n<ul>\n<li>Th\u1eed nghi\u1ec7m Charpy v\u1edbi v\u1ebft c\u1eaft h\u00ecnh ch\u1eef V \u1edf nhi\u1ec7t \u0111\u1ed9 thi\u1ebft k\u1ebf<\/li>\n<li>N\u0103ng l\u01b0\u1ee3ng va ch\u1ea1m t\u1ed1i thi\u1ec3u: 20 joule (15 ft-lbs) (gi\u00e1 tr\u1ecb th\u00f4ng th\u01b0\u1eddng)<\/li>\n<li>Y\u00eau c\u1ea7u v\u1ec1 m\u1edf r\u1ed9ng ngang theo ti\u00eau chu\u1ea9n ASME B31.3<\/li>\n<\/ul>\n<h3>C\u00e1c y\u1ebfu t\u1ed1 c\u1ea7n xem x\u00e9t trong thi\u1ebft k\u1ebf<\/h3>\n<ol>\n<li><strong>S\u1ef1 co l\u1ea1i do nhi\u1ec7t:<\/strong> C\u1ea7n t\u00ednh \u0111\u1ebfn hi\u1ec7n t\u01b0\u1ee3ng co ng\u00f3t v\u1eadt li\u1ec7u \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p<\/li>\n<li><strong>V\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t:<\/strong> Ng\u0103n ch\u1eb7n nhi\u1ec7t x\u00e2m nh\u1eadp v\u00e0 hi\u1ec7n t\u01b0\u1ee3ng \u0111\u00f3ng b\u0103ng b\u00ean ngo\u00e0i<\/li>\n<li><strong>H\u1ec7 th\u1ed1ng h\u1ed7 tr\u1ee3:<\/strong> \u0110\u1ea3m b\u1ea3o c\u00f3 kho\u1ea3ng tr\u1ed1ng \u0111\u1ec3 b\u00f9 \u0111\u1eafp s\u1ef1 gi\u00e3n n\u1edf do nhi\u1ec7t<\/li>\n<li><strong>L\u1ef1a ch\u1ecdn gio\u0103ng:<\/strong> S\u1eed d\u1ee5ng c\u00e1c mi\u1ebfng \u0111\u1ec7m ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 c\u1ef1c th\u1ea5p (lo\u1ea1i cu\u1ed9n xo\u1eafn, PTFE)<\/li>\n<li><strong>V\u1eb7n bu-l\u00f4ng:<\/strong> Bu l\u00f4ng ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 th\u1ea5p (ASTM A320 L7, L7M)<\/li>\n<\/ol>\n<h3>C\u00e1c \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn<\/h3>\n<ul>\n<li><strong>C\u00e1c c\u01a1 s\u1edf LNG:<\/strong> Qu\u00e1 tr\u00ecnh h\u00f3a l\u1ecfng, l\u01b0u tr\u1eef, t\u00e1i h\u00f3a kh\u00ed<\/li>\n<li><strong>Ph\u00e2n t\u00e1ch kh\u00ed:<\/strong> S\u1ea3n xu\u1ea5t oxy l\u1ecfng, nit\u01a1 l\u1ecfng v\u00e0 argon l\u1ecfng<\/li>\n<li><strong>H\u00f3a d\u1ea7u:<\/strong> Nh\u00e0 m\u00e1y s\u1ea3n xu\u1ea5t ethylene, propylene<\/li>\n<li><strong>Ng\u00e0nh c\u00f4ng nghi\u1ec7p th\u1ef1c ph\u1ea9m:<\/strong> \u0110\u00f4ng l\u1ea1nh \u1edf nhi\u1ec7t \u0111\u1ed9 c\u1ef1c th\u1ea5p<\/li>\n<li><strong>Y t\u1ebf:<\/strong> B\u1ea3o qu\u1ea3n b\u1eb1ng nit\u01a1 l\u1ecfng<\/li>\n<\/ul>\n<h3>Ti\u00eau chu\u1ea9n v\u00e0 Quy chu\u1ea9n<\/h3>\n<ul>\n<li>ASME B31.3: H\u1ec7 th\u1ed1ng \u1ed1ng d\u1eabn c\u00f4ng ngh\u1ec7 (Ch\u01b0\u01a1ng IX: Nhi\u1ec7t \u0111\u1ed9 th\u1ea5p)<\/li>\n<li>ASME B16.5: Y\u00eau c\u1ea7u v\u1ec1 bu l\u00f4ng \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p<\/li>\n<li>ASTM A350: Ph\u00f4i r\u00e8n th\u00e9p cacbon ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 th\u1ea5p<\/li>\n<li>EN 1092-1: Ti\u00eau chu\u1ea9n ch\u00e2u \u00c2u v\u1ec1 m\u1eb7t b\u00edch d\u00f9ng trong c\u00f4ng ngh\u1ec7 nhi\u1ec7t \u0111\u1ed9 c\u1ef1c th\u1ea5p<\/li>\n<li>BS 6364: Van nhi\u1ec7t \u0111\u1ed9 th\u1ea5p<\/li>\n<\/ul>\n<h3>Ki\u1ec3m tra v\u00e0 th\u1eed nghi\u1ec7m<\/h3>\n<ul>\n<li>Ki\u1ec3m tra b\u1eb1ng m\u1eaft th\u01b0\u1eddng 100%<\/li>\n<li>Ki\u1ec3m tra b\u1eb1ng h\u1ea1t t\u1eeb ho\u1eb7c ch\u1ea5t th\u1ea5m m\u00e0u<\/li>\n<li>Th\u1eed nghi\u1ec7m va \u0111\u1eadp theo t\u1eebng l\u00f4 x\u1eed l\u00fd nhi\u1ec7t<\/li>\n<li>Th\u1eed nghi\u1ec7m th\u1ee7y t\u0129nh \u1edf nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng<\/li>\n<\/ul>\n<p>Vi\u1ec7c l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u ph\u00f9 h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ec3 ng\u0103n ng\u1eeba c\u00e1c s\u1ef1 c\u1ed1 nghi\u00eam tr\u1ecdng. Lu\u00f4n tham kh\u1ea3o c\u00e1c ti\u00eau chu\u1ea9n k\u1ef9 thu\u1eadt li\u00ean quan v\u00e0 xem x\u00e9t thi\u1ebft k\u1ebf t\u1ed5ng th\u1ec3 c\u1ee7a h\u1ec7 th\u1ed1ng khi l\u1ef1a ch\u1ecdn m\u1eb7t b\u00edch d\u00f9ng trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 c\u1ef1c th\u1ea5p.<\/p>\n<p><strong>WhatsApp:<\/strong>\u00a0+86-18658777855<br \/>\n<strong>Email:<\/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\/vi\/wp-json\/wp\/v2\/posts\/1044","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.songhaiflange.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.songhaiflange.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.songhaiflange.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.songhaiflange.com\/vi\/wp-json\/wp\/v2\/comments?post=1044"}],"version-history":[{"count":2,"href":"https:\/\/www.songhaiflange.com\/vi\/wp-json\/wp\/v2\/posts\/1044\/revisions"}],"predecessor-version":[{"id":1054,"href":"https:\/\/www.songhaiflange.com\/vi\/wp-json\/wp\/v2\/posts\/1044\/revisions\/1054"}],"wp:attachment":[{"href":"https:\/\/www.songhaiflange.com\/vi\/wp-json\/wp\/v2\/media?parent=1044"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.songhaiflange.com\/vi\/wp-json\/wp\/v2\/categories?post=1044"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.songhaiflange.com\/vi\/wp-json\/wp\/v2\/tags?post=1044"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}