{"id":49226,"date":"2026-02-26T10:35:30","date_gmt":"2026-02-26T10:35:30","guid":{"rendered":"https:\/\/www.kdmsteel.com\/?p=49226"},"modified":"2026-03-07T10:30:30","modified_gmt":"2026-03-07T10:30:30","slug":"api-650-vs-api-620","status":"publish","type":"post","link":"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/","title":{"rendered":"API 650 vs API 620 \u2013 Lequel choisir pour votre r\u00e9servoir de stockage ?"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">La question de savoir s&#039;il faut choisir entre les normes API 650 et API 620 se pose souvent lors du choix d&#039;une cuve de stockage en acier soud\u00e9 pour le p\u00e9trole, le gaz ou les produits chimiques. Ces deux normes proviennent de l&#039;API 650.<\/span><a href=\"https:\/\/www.api.org\/\"> <b>Institut am\u00e9ricain du p\u00e9trole<\/b><\/a><span style=\"font-weight: 400;\"> Ces guides vous expliquent comment construire un r\u00e9servoir, mais ils sont con\u00e7us pour des temp\u00e9ratures et des pressions diff\u00e9rentes. Faire le bon choix vous permettra de pr\u00e9server votre budget, la s\u00e9curit\u00e9 de vos op\u00e9rations et la fiabilit\u00e9 de vos processus sur le long terme.<\/span><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table des mati\u00e8res<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Basculer la table des mati\u00e8res\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Basculer<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#What_Is_API_650_Standard\" >Qu&#039;est-ce que la norme API 650\u00a0?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#What_Is_API_620_Standard\" >Qu&#039;est-ce que la norme API 620\u00a0?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#Side-by-Side_Comparison_API_650_vs_API_620\" >Comparaison c\u00f4te \u00e0 c\u00f4te\u00a0: API 650 vs API 620<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#Applicable_Pressure_Range\" >Plage de pression applicable<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#API_650\" >API 650<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#API_620\" >API 620<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#Temperature_Range\" >Plage de temp\u00e9rature<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#API_650-2\" >API 650<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#API_620-2\" >API 620<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#Scope_and_Purpose_of_Standards\" >Port\u00e9e et objectif des normes<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#API_650-3\" >API 650<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#API_620-3\" >API 620<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#Tank_Configuration_Geometry\" >Configuration et g\u00e9om\u00e9trie du r\u00e9servoir<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#API_650-4\" >API 650<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#API_620-4\" >API 620\u00a0:<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#Typical_Tank_Sizes\" >Dimensions typiques des r\u00e9servoirs<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#API_650-5\" >API 650<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#Fabrication_Erection\" >Fabrication et montage<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#API_650-6\" >API 650<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#API_620-5\" >API 620<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#Materials_Allowed\" >Mat\u00e9riaux autoris\u00e9s<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#API_650-7\" >API 650<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#API_620-6\" >API 620<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#Inspection_and_Testing_Standards\" >Normes d&#039;inspection et d&#039;essai<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#API_650-8\" >API 650<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#API_620-7\" >API 620<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#Roof_Closure_Types\" >Types de toitures et de fermetures<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#API_650-9\" >API 650<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#API_620-8\" >API 620<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#Application_Industry_Use\" >Applications et utilisation dans l&#039;industrie<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#API_650-10\" >API 650<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#API_620-9\" >API 620<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#API_650_vs_API_620_%E2%80%93_Quick_Comparison_Table\" >Tableau comparatif rapide API 650 vs API 620<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-34\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#API_650_vs_API_620_%E2%80%93_Which_One_Is_Best\" >API 650 vs API 620 \u2013 Laquelle est la meilleure ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-35\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#FAQs\" >FAQ<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-36\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#Can_API_620_tanks_work_when_the_pressure_outside_is_normal\" >Les r\u00e9servoirs API 620 peuvent-ils fonctionner lorsque la pression ext\u00e9rieure est normale\u00a0?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-37\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#API_620_or_API_650_Which_costs_less\" >API 620 ou API 650\u00a0? Laquelle co\u00fbte le moins cher\u00a0?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-38\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#Is_it_possible_to_change_an_API_650_tank_to_an_API_620_tank\" >Est-il possible de transformer un r\u00e9servoir API 650 en un r\u00e9servoir API 620\u00a0?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-39\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#How_are_inspections_done_for_API_620_and_API_650_the_same\" >En quoi les inspections r\u00e9alis\u00e9es pour les normes API 620 et API 650 sont-elles identiques\u00a0?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-40\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#Can_API_620_and_API_650_be_used_together\" >Les API 620 et 650 peuvent-elles \u00eatre utilis\u00e9es ensemble\u00a0?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-41\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#Do_radiography_tests_have_to_be_done_for_API_620\" >Des tests radiographiques sont-ils n\u00e9cessaires pour la norme API 620\u00a0?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-42\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#Does_temperature_play_a_role_in_choosing_between_API_620_and_650\" >La temp\u00e9rature joue-t-elle un r\u00f4le dans le choix entre les normes API 620 et 650\u00a0?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-43\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/#Get_Customized_Storage_Tanks_from_KDM_Steel\" >Obtenez des r\u00e9servoirs de stockage personnalis\u00e9s chez KDM Steel<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_Is_API_650_Standard\"><\/span><b>Qu&#039;est-ce que la norme API 650\u00a0?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-49228\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-89.png\" alt=\"\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-89.png 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-89-150x84.png 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-89-768x432.png 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-89-18x10.png 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">La norme API 650 d\u00e9finit la conception et la construction de r\u00e9servoirs de stockage soud\u00e9s fonctionnant \u00e0 des pressions proches de la pression atmosph\u00e9rique. Elle concerne principalement les r\u00e9servoirs hors sol contenant du p\u00e9trole brut, de l&#039;eau et des produits finis. Cette norme porte essentiellement sur le choix des mat\u00e9riaux appropri\u00e9s, la garantie de la s\u00e9curit\u00e9 du stockage des produits \u00e0 basse pression interne, ainsi que sur leur inspection et leurs essais.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_Is_API_620_Standard\"><\/span><b>Qu&#039;est-ce que la norme API 620\u00a0?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-49229\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-90.png\" alt=\"\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-90.png 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-90-150x84.png 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-90-768x432.png 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-90-18x10.png 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">L&#039;API 620 nous explique comment planifier et construire de grands projets.,<\/span><a href=\"https:\/\/www.kdmsteel.com\/fr\/soudure-de-reservoirs-en-acier-inoxydable\/\"> <b>r\u00e9servoirs en acier inoxydable soud\u00e9s<\/b><\/a><span style=\"font-weight: 400;\"> qui fonctionnent \u00e0 des pressions internes faibles \u00e0 mod\u00e9r\u00e9es. On l&#039;utilise souvent pour stocker des produits qui doivent \u00eatre maintenus au froid ou congel\u00e9s, comme<\/span><b> GPL<\/b><span style=\"font-weight: 400;\"> et au GNL. Il peut supporter des contraintes de conception plus \u00e9lev\u00e9es et des conditions de temp\u00e9rature plus extr\u00eames que la norme API 650.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Side-by-Side_Comparison_API_650_vs_API_620\"><\/span><b>Comparaison c\u00f4te \u00e0 c\u00f4te\u00a0: API 650 vs API 620<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-49230\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-91.png\" alt=\"\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-91.png 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-91-150x84.png 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-91-768x432.png 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-91-18x10.png 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Applicable_Pressure_Range\"><\/span><b>Plage de pression applicable<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"API_650\"><\/span><b>API 650<\/b><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">La norme API 650 est con\u00e7ue pour le stockage \u00e0 pression atmosph\u00e9rique ou \u00e0 tr\u00e8s basse pression. Elle est adapt\u00e9e aux r\u00e9servoirs fonctionnant \u00e0 la pression atmosph\u00e9rique normale jusqu&#039;\u00e0 environ 2,5 psig. De nombreuses raffineries et installations de stockage en vrac utilisent ces r\u00e9servoirs pour stocker des liquides sans risque de surpression. L&#039;API 650 est une solution \u00e9conomique et largement reconnue par l&#039;industrie pour l&#039;eau, le gazole, le p\u00e9trole brut et autres produits similaires. Elle ne complexifie pas le dimensionnement des r\u00e9servoirs sous pression.<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"API_620\"><\/span><b>API 620<\/b><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">La norme API 620 convient aux r\u00e9servoirs \u00e0 pression interne faible \u00e0 mod\u00e9r\u00e9e, g\u00e9n\u00e9ralement sup\u00e9rieure \u00e0 2,5 psig et pouvant atteindre 15 psig, voire plus selon les exigences de conception. Elle est g\u00e9n\u00e9ralement privil\u00e9gi\u00e9e pour les carburants volatils ou sous pression comme le GPL. Cette norme autorise des contraintes membranaires plus \u00e9lev\u00e9es, des parois plus robustes et une meilleure r\u00e9sistance structurelle, garantissant ainsi le fonctionnement s\u00fbr du syst\u00e8me m\u00eame sous haute pression interne.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Temperature_Range\"><\/span><b>Plage de temp\u00e9rature<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"API_650-2\"><\/span><b>API 650<\/b><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">Les r\u00e9servoirs API 650 sont g\u00e9n\u00e9ralement con\u00e7us pour fonctionner aux temp\u00e9ratures ambiantes. Bien qu&#039;ils puissent supporter des temp\u00e9ratures l\u00e9g\u00e8rement sup\u00e9rieures, cette norme n&#039;est pas adapt\u00e9e aux applications cryog\u00e9niques ou \u00e0 tr\u00e8s basses temp\u00e9ratures. Lorsque les temp\u00e9ratures chutent fortement, la robustesse et la r\u00e9sistance \u00e0 la rupture du mat\u00e9riau deviennent primordiales. De ce fait, la norme API 650 est inadapt\u00e9e aux environnements extr\u00eamement froids.<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"API_620-2\"><\/span><b>API 620<\/b><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">L&#039;API 620 est con\u00e7ue pour g\u00e9rer les utilisations n\u00e9cessitant le stockage d&#039;\u00e9l\u00e9ments \u00e0 basse temp\u00e9rature ou congel\u00e9s, comme par exemple\u00a0: <\/span><b>GNL<\/b><span style=\"font-weight: 400;\"> et d&#039;autres gaz liqu\u00e9fi\u00e9s. Des r\u00e8gles strictes encadrent la t\u00e9nacit\u00e9 \u00e0 basse temp\u00e9rature, les essais de r\u00e9silience et l&#039;utilisation de certains mat\u00e9riaux. La norme API 620 offre des protections m\u00e9tallurgiques importantes pour les installations fonctionnant \u00e0 des temp\u00e9ratures n\u00e9gatives, afin d&#039;\u00e9viter la rupture ou la fragilisation des structures.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Scope_and_Purpose_of_Standards\"><\/span><b>Port\u00e9e et objectif des normes<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"API_650-3\"><\/span><b>API 650<\/b><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">La norme API 650 concerne la planification, la construction, l&#039;inspection et les essais des grands r\u00e9servoirs atmosph\u00e9riques de stockage hors sol. Elle d\u00e9finit les normes relatives aux techniques de construction pour le stockage du p\u00e9trole et des liquides dans le monde entier. Largement utilis\u00e9e dans les raffineries, les terminaux et les installations de stockage industriel, la norme API 650 est reconnue internationalement et repose sur des crit\u00e8res simples.<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"API_620-3\"><\/span><b>API 620<\/b><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">La norme API 620 couvre les r\u00e9servoirs fonctionnant \u00e0 des pressions plus \u00e9lev\u00e9es et des temp\u00e9ratures plus basses, en plus des r\u00e9servoirs d&#039;air. Elle int\u00e8gre des m\u00e9thodes d&#039;analyse des contraintes plus avanc\u00e9es, des r\u00e8gles d&#039;\u00e9tanch\u00e9it\u00e9 des joints plus strictes et des contr\u00f4les qualit\u00e9 renforc\u00e9s. De ce fait, l&#039;API 620 peut \u00eatre utilis\u00e9e dans les raffineries de p\u00e9trole et les usines de traitement de gaz soumises \u00e0 des conditions d&#039;utilisation extr\u00eames.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tank_Configuration_Geometry\"><\/span><b>Configuration et g\u00e9om\u00e9trie du r\u00e9servoir<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"API_650-4\"><\/span><b>API 650<\/b><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">La plupart des r\u00e9servoirs API 650 sont droits, cylindriques et \u00e0 fond plat, ce qui facilite leur installation sur site. Selon l&#039;instabilit\u00e9 du produit, la toiture peut \u00eatre fixe, flottante ou ouverte. Leur forme privil\u00e9gie la simplicit\u00e9, l&#039;efficacit\u00e9 et la r\u00e9duction des co\u00fbts pour le stockage d&#039;un grand volume d&#039;air dans l&#039;atmosph\u00e8re.<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"API_620-4\"><\/span><b>API 620\u00a0:<\/b><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">Les r\u00e9servoirs conformes \u00e0 la norme API 620 sont g\u00e9n\u00e9ralement dot\u00e9s de toits bomb\u00e9s ou de couvercles r\u00e9sistants \u00e0 la pression, con\u00e7us pour supporter la pression interne. Le plus souvent, les t\u00f4les de la paroi sont plus grandes et plus robustes, ce qui leur permet de r\u00e9sister \u00e0 des contraintes plus \u00e9lev\u00e9es. Pour assurer le fonctionnement des r\u00e9servoirs cryog\u00e9niques \u00e0 basse temp\u00e9rature, des syst\u00e8mes d&#039;isolation et des couches sp\u00e9ciales sont int\u00e9gr\u00e9s \u00e0 leur structure m\u00eame.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Typical_Tank_Sizes\"><\/span><b>Dimensions typiques des r\u00e9servoirs<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"API_650-5\"><\/span><b>API 650<\/b><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">Les r\u00e9servoirs API 650 peuvent contenir des quantit\u00e9s tr\u00e8s variables de p\u00e9trole, allant des petits r\u00e9servoirs de traitement aux tr\u00e8s grands r\u00e9servoirs de stockage de p\u00e9trole brut pouvant contenir plus de 100\u00a0000 barils. Leur capacit\u00e9 modulable les rend parfaitement adapt\u00e9s aux raffineries et aux installations de stockage en vrac qui doivent stocker d&#039;importantes quantit\u00e9s d&#039;air sans engendrer de surco\u00fbts li\u00e9s \u00e0 la conception sous pression.<\/span><\/p>\n<p><b>API 620<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Ces r\u00e9servoirs sont \u00e9galement con\u00e7us pour \u00eatre de tr\u00e8s grande taille, mais ils sont privil\u00e9gi\u00e9s lorsqu&#039;un important volume de stockage est requis, ainsi qu&#039;une pression interne ou un service \u00e0 basse temp\u00e9rature. C&#039;est pourquoi la norme API 620 est la plus adapt\u00e9e \u00e0 la construction de r\u00e9servoirs de GNL et de GPL, qui doivent \u00eatre \u00e0 la fois volumineux et robustes.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Fabrication_Erection\"><\/span><b>Fabrication et montage<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"API_650-6\"><\/span><b>API 650<\/b><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">La fabrication selon la norme API 650 est g\u00e9n\u00e9ralement r\u00e9alis\u00e9e sur site \u00e0 partir de plaques d&#039;acier bras\u00e9es. Le proc\u00e9d\u00e9 d&#039;assemblage d&#039;un r\u00e9servoir est bien connu et utilis\u00e9 par la plupart des constructeurs. Des m\u00e9thodes d&#039;inspection et d&#039;essai normalis\u00e9es permettent d&#039;acc\u00e9l\u00e9rer la construction, de respecter les d\u00e9lais et de r\u00e9duire le co\u00fbt total de fabrication.<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"API_620-5\"><\/span><b>API 620<\/b><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">Pour la fabrication selon la norme API 620, des m\u00e9thodes de soudage plus rigoureuses, un contr\u00f4le qualit\u00e9 accru et des inspections plus approfondies sont n\u00e9cessaires en raison des pressions et contraintes plus \u00e9lev\u00e9es en jeu. Bien souvent, le montage exige un contr\u00f4le d&#039;ing\u00e9nierie plus pouss\u00e9 et des m\u00e9thodes d&#039;essai plus avanc\u00e9es. Cela complexifie le processus, mais garantit \u00e9galement une s\u00e9curit\u00e9 et une fiabilit\u00e9 accrues sur le long terme.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Materials_Allowed\"><\/span><b>Mat\u00e9riaux autoris\u00e9s<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"API_650-7\"><\/span><b>API 650<\/b><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">La norme API 650 autorise principalement les produits en acier au carbone utilisables \u00e0 temp\u00e9rature et pression ambiantes. Le choix du mat\u00e9riau repose sur sa soudabilit\u00e9 et sa robustesse requises pour un usage quotidien. Cependant, les options sont plus limit\u00e9es pour les basses temp\u00e9ratures ou les applications sp\u00e9cifiques.<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"API_620-6\"><\/span><b>API 620<\/b><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">La norme API 620 permet d&#039;utiliser une gamme plus \u00e9tendue de produits, notamment des aciers plus r\u00e9sistants aux basses temp\u00e9ratures. Cette plus grande diversit\u00e9 de mat\u00e9riaux est essentielle pour les applications n\u00e9cessitant le maintien de temp\u00e9ratures basses ou \u00e9lev\u00e9es. La norme garantit que les mat\u00e9riaux conservent leur r\u00e9sistance, leur flexibilit\u00e9 et leur durabilit\u00e9, m\u00eame \u00e0 haute temp\u00e9rature.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Inspection_and_Testing_Standards\"><\/span><b>Normes d&#039;inspection et d&#039;essai<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"API_650-8\"><\/span><b>API 650<\/b><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">Conform\u00e9ment \u00e0 la classification conjointe, la norme API 650 exige une inspection rigoureuse, des essais hydrostatiques et des contr\u00f4les radiographiques limit\u00e9s. Ce programme d&#039;inspection, utile et peu co\u00fbteux, peut \u00eatre appliqu\u00e9 aux r\u00e9servoirs atmosph\u00e9riques tout en respectant les r\u00e8gles de s\u00e9curit\u00e9 en vigueur dans l&#039;industrie p\u00e9troli\u00e8re.<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"API_620-7\"><\/span><b>API 620<\/b><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">La norme API 620 exige des contr\u00f4les non destructifs plus rigoureux et des contr\u00f4les radiographiques plus approfondis, notamment dans les zones sous pression. Ces m\u00e9thodes de contr\u00f4le plus performantes garantissent une meilleure r\u00e9sistance des soudures et une plus grande fiabilit\u00e9 de la structure sous pression et \u00e0 basse temp\u00e9rature.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Roof_Closure_Types\"><\/span><b>Types de toitures et de fermetures<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"API_650-9\"><\/span><b>API 650<\/b><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">L&#039;API 650 fonctionne avec diff\u00e9rents types de toitures, telles que les toitures fixes, les toitures mobiles et les toitures ouvertes.<\/span><a href=\"https:\/\/www.kdmsteel.com\/fr\/reservoir-a-toit-fixe-ou-a-toit-flottant\/\"> <b>R\u00e9servoirs \u00e0 toit fixe et \u00e0 toit flottant<\/b><\/a><span style=\"font-weight: 400;\"> Elles sont souvent utilis\u00e9es pour les combustibles volatils afin de minimiser les \u00e9missions et les pertes par \u00e9vaporation. Les diff\u00e9rents types de toitures permettent de s&#039;adapter \u00e0 divers besoins de stockage et aux exigences environnementales.<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"API_620-8\"><\/span><b>API 620<\/b><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">La norme API 620 utilise g\u00e9n\u00e9ralement des toits en forme de d\u00f4me capables de r\u00e9sister \u00e0 la pression et faisant partie de la limite de pression du r\u00e9servoir. Ces syst\u00e8mes de toit sont con\u00e7us pour contenir en toute s\u00e9curit\u00e9 les charges d&#039;air internes. Lors du stockage de GPL et de gaz r\u00e9frig\u00e9rants, la conception du toit est primordiale pour garantir l&#039;\u00e9tanch\u00e9it\u00e9 du confinement.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Application_Industry_Use\"><\/span><b>Applications et utilisation dans l&#039;industrie<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"API_650-10\"><\/span><b>API 650<\/b><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">La norme API 650 est largement utilis\u00e9e, notamment dans les raffineries, les ports p\u00e9troliers, les stations d&#039;\u00e9puration et les usines. Elle constitue la solution optimale pour le stockage d&#039;eau, de gazole, d&#039;essence, de p\u00e9trole brut et autres produits similaires sous pression atmosph\u00e9rique. Elle demeure la norme la plus r\u00e9pandue pour les r\u00e9servoirs de stockage gr\u00e2ce \u00e0 sa simplicit\u00e9 d&#039;utilisation et \u00e0 sa reconnaissance internationale.<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"API_620-9\"><\/span><b>API 620<\/b><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 400;\">Dans les ports m\u00e9thaniers, les installations de stockage de GPL, les usines p\u00e9trochimiques et les unit\u00e9s de traitement de gaz, la norme API 620 est le choix optimal. Pour le stockage de liquides sous pression ou en chambre froide, cette norme garantit \u00e0 la structure la robustesse et la fiabilit\u00e9 des mat\u00e9riaux n\u00e9cessaires \u00e0 un fonctionnement s\u00fbr et durable.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"API_650_vs_API_620_%E2%80%93_Quick_Comparison_Table\"><\/span><b>Tableau comparatif rapide API 650 vs API 620<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<table>\n<tbody>\n<tr>\n<td><b>Param\u00e8tre<\/b><\/td>\n<td><b>API 650<\/b><\/td>\n<td><b>API 620<\/b><\/td>\n<\/tr>\n<tr>\n<td><b>Plage de pression applicable<\/b><\/td>\n<td><span style=\"font-weight: 400;\">Pression atmosph\u00e9rique jusqu&#039;\u00e0 environ 2,5 psig<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Au-dessus de ~2,5 psig, pression faible \u00e0 mod\u00e9r\u00e9e<\/span><\/td>\n<\/tr>\n<tr>\n<td><b>Plage de temp\u00e9rature<\/b><\/td>\n<td><span style=\"font-weight: 400;\">Temp\u00e9ratures ambiantes<\/span><\/td>\n<td><span style=\"font-weight: 400;\">basses et cryog\u00e9niques temp\u00e9ratures<\/span><\/td>\n<\/tr>\n<tr>\n<td><b>Port\u00e9e et objectifs<\/b><\/td>\n<td><span style=\"font-weight: 400;\">R\u00e9servoirs de stockage atmosph\u00e9riques<\/span><\/td>\n<td><span style=\"font-weight: 400;\">R\u00e9servoirs sous pression et \u00e0 basse temp\u00e9rature<\/span><\/td>\n<\/tr>\n<tr>\n<td><b>Configuration du r\u00e9servoir<\/b><\/td>\n<td><span style=\"font-weight: 400;\">Vertical, cylindrique, \u00e0 fond plat<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Coques renforc\u00e9es, toits en d\u00f4me<\/span><\/td>\n<\/tr>\n<tr>\n<td><b>Dimensions typiques des r\u00e9servoirs<\/b><\/td>\n<td><span style=\"font-weight: 400;\">stockage atmosph\u00e9rique de grand volume<\/span><\/td>\n<td><span style=\"font-weight: 400;\">grand volume sous pression ou r\u00e9frig\u00e9r\u00e9<\/span><\/td>\n<\/tr>\n<tr>\n<td><b>Fabrication et montage<\/b><\/td>\n<td><span style=\"font-weight: 400;\">Soudage standard sur site<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Soudage et contr\u00f4les plus stricts<\/span><\/td>\n<\/tr>\n<tr>\n<td><b>Mat\u00e9riaux autoris\u00e9s<\/b><\/td>\n<td><a href=\"https:\/\/www.kdmsteel.com\/fr\/acier-au-carbone-1066\/\"><b>Acier au carbone 1066<\/b><\/a><\/td>\n<td><span style=\"font-weight: 400;\">Mat\u00e9riaux plus larges pour les basses temp\u00e9ratures<\/span><\/td>\n<\/tr>\n<tr>\n<td><b>Inspection et essais<\/b><\/td>\n<td><span style=\"font-weight: 400;\">Radiographie limit\u00e9e<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Contr\u00f4les non destructifs et radiographies approfondis<\/span><\/td>\n<\/tr>\n<tr>\n<td><b>Types de toitures et de fermetures<\/b><\/td>\n<td><span style=\"font-weight: 400;\">Toits fixes ou flottants<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Toits en d\u00f4me r\u00e9sistants \u00e0 la pression<\/span><\/td>\n<\/tr>\n<tr>\n<td><b>Applications et utilisation dans l&#039;industrie<\/b><\/td>\n<td><span style=\"font-weight: 400;\">Raffineries, terminaux, stockage d&#039;eau<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Installations de GNL, de GPL et de p\u00e9trochimie<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><span class=\"ez-toc-section\" id=\"API_650_vs_API_620_%E2%80%93_Which_One_Is_Best\"><\/span><b>API 650 vs API 620 \u2013 Laquelle est la meilleure ?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-49231\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-92.png\" alt=\"\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-92.png 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-92-150x84.png 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-92-768x432.png 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-92-18x10.png 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Il n&#039;existe pas de solution universellement \u201c\u00a0id\u00e9ale\u00a0\u201d. La norme API 650 est parfaitement adapt\u00e9e au stockage \u00e0 temp\u00e9rature ambiante et \u00e0 pression atmosph\u00e9rique. Pour les liquides sous pression ou tr\u00e8s froids, la norme API 620 est plus s\u00fbre. Le choix de la norme appropri\u00e9e d\u00e9pend du type de produit, de la temp\u00e9rature, de la pression et des conditions d&#039;utilisation \u00e0 long terme. Une \u00e9valuation pr\u00e9coce permet d&#039;\u00e9viter des modifications co\u00fbteuses.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"FAQs\"><\/span><b>FAQ<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><b>Les r\u00e9servoirs API 650 peuvent-ils \u00eatre utilis\u00e9s pour le stockage cryog\u00e9nique\u00a0?<\/b><b><br \/>\n<\/b><span style=\"font-weight: 400;\"> Absolument pas. Les r\u00e9servoirs API 650 ne sont pas con\u00e7us pour \u00eatre utilis\u00e9s dans des conditions de basses temp\u00e9ratures. Ils ne peuvent \u00eatre utilis\u00e9s que dans des environnements dont la temp\u00e9rature est proche de la temp\u00e9rature ambiante.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_API_620_tanks_work_when_the_pressure_outside_is_normal\"><\/span><b>Les r\u00e9servoirs API 620 peuvent-ils fonctionner lorsque la pression ext\u00e9rieure est normale\u00a0?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Les r\u00e9servoirs API 620 peuvent fonctionner \u00e0 pression atmosph\u00e9rique normale. Cependant, ils sont g\u00e9n\u00e9ralement choisis lorsque l&#039;on pr\u00e9voit une pression interne plus \u00e9lev\u00e9e.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"API_620_or_API_650_Which_costs_less\"><\/span><b>API 620 ou API 650\u00a0? Laquelle co\u00fbte le moins cher\u00a0?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">La plupart du temps, les r\u00e9servoirs conformes \u00e0 la norme API 650 sont moins chers. Cela s&#039;explique par des normes moins strictes en mati\u00e8re de conception, de mat\u00e9riaux et d&#039;inspections.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Is_it_possible_to_change_an_API_650_tank_to_an_API_620_tank\"><\/span><b>Est-il possible de transformer un r\u00e9servoir API 650 en un r\u00e9servoir API 620\u00a0?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Passer de la norme API 650 \u00e0 la norme API 620 n&#039;est pas chose ais\u00e9e. Cela n\u00e9cessite g\u00e9n\u00e9ralement une refonte et un renforcement structurels importants.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_are_inspections_done_for_API_620_and_API_650_the_same\"><\/span><b>En quoi les inspections r\u00e9alis\u00e9es pour les normes API 620 et API 650 sont-elles identiques\u00a0?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Non, les r\u00e8gles d&#039;inspection diff\u00e8rent selon les normes. L&#039;API 620 exige des tests plus approfondis qui ne risquent pas d&#039;endommager quoi que ce soit.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_API_620_and_API_650_be_used_together\"><\/span><b>Les API 620 et 650 peuvent-elles \u00eatre utilis\u00e9es ensemble\u00a0?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Non, ces normes ne sont pas interchangeables. Seules la pression de conception et la temp\u00e9rature de service sont pertinentes pour le choix.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Do_radiography_tests_have_to_be_done_for_API_620\"><\/span><b>Des tests radiographiques sont-ils n\u00e9cessaires pour la norme API 620\u00a0?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Oui, les tests radiographiques sont requis par la norme API 620. La plupart du temps, les normes sont plus strictes que celles de l&#039;API 650.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Does_temperature_play_a_role_in_choosing_between_API_620_and_650\"><\/span><b>La temp\u00e9rature joue-t-elle un r\u00f4le dans le choix entre les normes API 620 et 650\u00a0?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Oui, les conditions m\u00e9t\u00e9orologiques sont un facteur tr\u00e8s important dans le choix d&#039;une norme. Les applications qui doivent fonctionner \u00e0 basses temp\u00e9ratures ou par temps froid n\u00e9cessitent g\u00e9n\u00e9ralement l&#039;API 620.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Get_Customized_Storage_Tanks_from_KDM_Steel\"><\/span><b>Obtenez des r\u00e9servoirs de stockage personnalis\u00e9s chez KDM Steel<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-49232\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-93.png\" alt=\"\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-93.png 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-93-150x84.png 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-93-768x432.png 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-93-18x10.png 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Selon les besoins de votre projet,<\/span> <span style=\"font-weight: 400;\">Acier KDM<\/span><span style=\"font-weight: 400;\"> Nous pouvons construire des r\u00e9servoirs de stockage conformes aux normes API 650 ou API 620. Pour d\u00e9marrer votre projet, consultez nos solutions de r\u00e9servoirs de stockage, nos services de fabrication d&#039;acier et nos services de contr\u00f4le qualit\u00e9.<\/span><a href=\"https:\/\/www.kdmsteel.com\/fr\/contact\/\"> <b>Contactez-nous<\/b><\/a><span style=\"font-weight: 400;\"> Obtenez votre devis personnalis\u00e9 d\u00e8s aujourd&#039;hui\u00a0!.<\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>API 650 vs. API 620 is often the question that comes up when choosing a welded steel holding tank for oil, gas or chemical service. Both standards come from the American Petroleum Institute and tell you how to build a tank, but they are for different temperatures and pressures. Making the right choice will protect [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":49227,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"disabled","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-49226","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>API 650 vs API 620 \u2013 Which One Should You Choose for Your Storage Tank? - KDM Steel<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.kdmsteel.com\/fr\/api-650-vs-api-620\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"API 650 vs API 620 \u2013 Which One Should You Choose for Your Storage Tank? - KDM Steel\" \/>\n<meta property=\"og:description\" content=\"API 650 vs. API 620 is often the question that comes up when choosing a welded steel holding tank for oil, gas or chemical service. 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Both standards come from the American Petroleum Institute and tell you how to build a tank, but they are for different temperatures and pressures. 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