{"id":978,"date":"2026-04-12T23:09:02","date_gmt":"2026-04-13T03:09:02","guid":{"rendered":"https:\/\/www.songhaiflange.com\/?p=978"},"modified":"2026-04-12T23:19:59","modified_gmt":"2026-04-13T03:19:59","slug":"ped-vs-asme-vs-api-which-flange-standard-is-strictest","status":"publish","type":"post","link":"https:\/\/www.songhaiflange.com\/vi\/2026\/04\/12\/ped-vs-asme-vs-api-which-flange-standard-is-strictest\/","title":{"rendered":"PED, ASME hay API: Ti\u00eau chu\u1ea9n m\u1eb7t b\u00edch n\u00e0o nghi\u00eam ng\u1eb7t nh\u1ea5t?"},"content":{"rendered":"<h2>Understanding Flange Standards Comparison<\/h2>\n<p>Between ASME, API, ISO, and PED, which standard is strictest? The answer depends on what you measure.<\/p>\n<h2>PED: Europe Legal Mandate<\/h2>\n<p>The Pressure Equipment Directive (2014\/68\/EU) is an EU legislative directive for pressure equipment over 0.5 bar. Unlike voluntary ASME\/API standards, PED is a <strong>regulatory mandate<\/strong> requiring CE marking for EU market access.<\/p>\n<h3>PED Risk Categories (I-IV)<\/h3>\n<p>Classification based on fluid type, pressure, and volume. Category III and IV require Notified Body involvement.<\/p>\n<h2>ASME: Technical Heavyweight<\/h2>\n<p>ASME B16.5, B16.47, B31.3 set detailed requirements for pressure design calculations, material traceability, NDE and hydrostatic testing.<\/p>\n<h2>API: Industry-Specific<\/h2>\n<ul>\n<li>API 605: Large-diameter flanges<\/li>\n<li>API 6A: Wellhead equipment<\/li>\n<li>API 624: Fugitive emissions<\/li>\n<li>NACE MR0175: Sour service<\/li>\n<\/ul>\n<h2>Comparison Table<\/h2>\n<table border=\"1\" cellpadding=\"8\">\n<tr>\n<th>Standard<\/th>\n<th>Type<\/th>\n<th>Enforcement<\/th>\n<th>Best For<\/th>\n<\/tr>\n<tr>\n<td>PED<\/td>\n<td>Regulatory<\/td>\n<td>EU Legal Mandate<\/td>\n<td>EU Market Access<\/td>\n<\/tr>\n<tr>\n<td>Hi\u1ec7p h\u1ed9i K\u1ef9 s\u01b0 C\u01a1 kh\u00ed Hoa K\u1ef3<\/td>\n<td>Technical Code<\/td>\n<td>Adopted by Regulation<\/td>\n<td>Pressure Design<\/td>\n<\/tr>\n<tr>\n<td>API<\/td>\n<td>Industry Standard<\/td>\n<td>Contractual<\/td>\n<td>Oil and Gas<\/td>\n<\/tr>\n<tr>\n<td>ISO<\/td>\n<td>International<\/td>\n<td>Contractual<\/td>\n<td>Global Projects<\/td>\n<\/tr>\n<\/table>\n<h2>Bottom Line<\/h2>\n<ul>\n<li><strong>ASME:<\/strong> Most technically rigorous for pressure integrity<\/li>\n<li><strong>API:<\/strong> Most demanding for high-risk oil\/gas applications<\/li>\n<li><strong>PED:<\/strong> Only standard with force of law and mandatory third-party oversight<\/li>\n<\/ul>\n<p><strong>Songhai Flange<\/strong> manufactures to ASME, API, and PED standards with full certification.<\/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\"><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>So s\u00e1nh c\u00e1c ti\u00eau chu\u1ea9n m\u1eb7t b\u00edch gi\u1eefa ASME, API, ISO v\u00e0 PED: Ti\u00eau chu\u1ea9n n\u00e0o nghi\u00eam ng\u1eb7t nh\u1ea5t? C\u00e2u tr\u1ea3 l\u1eddi ph\u1ee5 thu\u1ed9c v\u00e0o ti\u00eau ch\u00ed \u0111\u00e1nh gi\u00e1. PED: Y\u00eau c\u1ea7u ph\u00e1p l\u00fd c\u1ee7a Ch\u00e2u \u00c2u Ch\u1ec9 th\u1ecb v\u1ec1 Thi\u1ebft b\u1ecb \u00c1p l\u1ef1c (2014\/68\/EU) l\u00e0 m\u1ed9t ch\u1ec9 th\u1ecb l\u1eadp ph\u00e1p c\u1ee7a Li\u00ean minh Ch\u00e2u \u00c2u (EU) \u00e1p d\u1ee5ng cho c\u00e1c thi\u1ebft b\u1ecb \u00e1p l\u1ef1c c\u00f3 \u00e1p su\u1ea5t tr\u00ean 0,5 bar. Kh\u00e1c v\u1edbi c\u00e1c ti\u00eau chu\u1ea9n t\u1ef1 nguy\u1ec7n ASME\/API, PED l\u00e0 m\u1ed9t quy \u0111\u1ecbnh b\u1eaft bu\u1ed9c y\u00eau c\u1ea7u d\u00e1n nh\u00e3n CE cho c\u00e1c s\u1ea3n ph\u1ea9m t\u1ea1i EU [\u2026]<\/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-978","post","type-post","status-publish","format-standard","hentry","category-blog"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.songhaiflange.com\/vi\/wp-json\/wp\/v2\/posts\/978","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=978"}],"version-history":[{"count":2,"href":"https:\/\/www.songhaiflange.com\/vi\/wp-json\/wp\/v2\/posts\/978\/revisions"}],"predecessor-version":[{"id":987,"href":"https:\/\/www.songhaiflange.com\/vi\/wp-json\/wp\/v2\/posts\/978\/revisions\/987"}],"wp:attachment":[{"href":"https:\/\/www.songhaiflange.com\/vi\/wp-json\/wp\/v2\/media?parent=978"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.songhaiflange.com\/vi\/wp-json\/wp\/v2\/categories?post=978"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.songhaiflange.com\/vi\/wp-json\/wp\/v2\/tags?post=978"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}