{"id":49183,"date":"2026-02-26T03:41:52","date_gmt":"2026-02-26T03:41:52","guid":{"rendered":"https:\/\/www.kdmsteel.com\/?p=49183"},"modified":"2026-03-07T10:31:13","modified_gmt":"2026-03-07T10:31:13","slug":"atmospheric-tank-vs-pressure-tank","status":"publish","type":"post","link":"https:\/\/www.kdmsteel.com\/fr\/reservoir-atmospherique-vs-reservoir-sous-pression\/","title":{"rendered":"R\u00e9servoir atmosph\u00e9rique vs r\u00e9servoir sous pression\u00a0: comparaison d\u00e9taill\u00e9e pour les ing\u00e9nieurs"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">Les liquides stock\u00e9s dans des r\u00e9servoirs atmosph\u00e9riques et des r\u00e9servoirs sous pression fonctionnent dans des conditions tr\u00e8s diff\u00e9rentes. Les acheteurs et les ing\u00e9nieurs industriels doivent choisir le r\u00e9servoir en fonction des exigences du proc\u00e9d\u00e9 et des normes de s\u00e9curit\u00e9. Un mauvais choix augmente les co\u00fbts du cycle de vie et les temps d&#039;arr\u00eat. Cet article compare ces deux types de r\u00e9servoirs selon des crit\u00e8res d&#039;ing\u00e9nierie pratiques.<\/span><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 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\/reservoir-atmospherique-vs-reservoir-sous-pression\/#What_is_an_Atmospheric_Tank\" >Qu&#039;est-ce qu&#039;un r\u00e9servoir atmosph\u00e9rique\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\/reservoir-atmospherique-vs-reservoir-sous-pression\/#What_is_a_Pressure_Tank\" >Qu&#039;est-ce qu&#039;un r\u00e9servoir sous pression ?<\/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\/reservoir-atmospherique-vs-reservoir-sous-pression\/#Major_Differences_between_Atmospheric_Tank_and_Pressure_Tank\" >Principales diff\u00e9rences entre un r\u00e9servoir atmosph\u00e9rique et un r\u00e9servoir sous pression<\/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\/reservoir-atmospherique-vs-reservoir-sous-pression\/#1_Operating_Pressure\" >1. Pression de service<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.kdmsteel.com\/fr\/reservoir-atmospherique-vs-reservoir-sous-pression\/#2_Design_and_Construction_Standards\" >2. Normes de conception et de construction<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.kdmsteel.com\/fr\/reservoir-atmospherique-vs-reservoir-sous-pression\/#3_Venting_vs_Sealing\" >3. Ventilation vs \u00c9tanch\u00e9it\u00e9<\/a><\/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\/reservoir-atmospherique-vs-reservoir-sous-pression\/#4_Material_and_Structural_Requirements\" >4. Exigences relatives aux mat\u00e9riaux et \u00e0 la structure<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.kdmsteel.com\/fr\/reservoir-atmospherique-vs-reservoir-sous-pression\/#5_Safety_and_Risk_Profile\" >5. Profil de s\u00e9curit\u00e9 et de risque<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.kdmsteel.com\/fr\/reservoir-atmospherique-vs-reservoir-sous-pression\/#6_Installation_and_Support_Systems\" >6. Syst\u00e8mes d&#039;installation et de support<\/a><\/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\/reservoir-atmospherique-vs-reservoir-sous-pression\/#7_Shape_and_Structural_Form\" >7. Forme et structure<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.kdmsteel.com\/fr\/reservoir-atmospherique-vs-reservoir-sous-pression\/#8_Regulatory_and_Inspection_Requirements\" >8. Exigences r\u00e9glementaires et d&#039;inspection<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.kdmsteel.com\/fr\/reservoir-atmospherique-vs-reservoir-sous-pression\/#9_Cost_Considerations\" >9. Consid\u00e9rations relatives aux co\u00fbts<\/a><\/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\/reservoir-atmospherique-vs-reservoir-sous-pression\/#10_Typical_Uses_and_Applications\" >10. Utilisations et applications typiques<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.kdmsteel.com\/fr\/reservoir-atmospherique-vs-reservoir-sous-pression\/#Atmospheric_Tank_vs_Pressure_Tank_%E2%80%93_Which_One_Is_Best\" >R\u00e9servoir atmosph\u00e9rique ou r\u00e9servoir sous pression\u00a0: lequel est le meilleur\u00a0?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.kdmsteel.com\/fr\/reservoir-atmospherique-vs-reservoir-sous-pression\/#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-16\" href=\"https:\/\/www.kdmsteel.com\/fr\/reservoir-atmospherique-vs-reservoir-sous-pression\/#Can_an_atmospheric_tank_be_considered_a_pressure_vessel\" >Un r\u00e9servoir atmosph\u00e9rique peut-il \u00eatre consid\u00e9r\u00e9 comme un r\u00e9cipient sous pression\u00a0?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.kdmsteel.com\/fr\/reservoir-atmospherique-vs-reservoir-sous-pression\/#What_shapes_are_common_for_pressure_vessels\" >Quelles sont les formes courantes des r\u00e9cipients sous pression ?<\/a><\/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\/reservoir-atmospherique-vs-reservoir-sous-pression\/#Are_there_atmospheric_tanks_controlled\" >Existe-t-il des r\u00e9servoirs atmosph\u00e9riques contr\u00f4l\u00e9s\u00a0?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.kdmsteel.com\/fr\/reservoir-atmospherique-vs-reservoir-sous-pression\/#Can_an_atmospheric_tank_require_special_permits\" >Un r\u00e9servoir atmosph\u00e9rique peut-il n\u00e9cessiter des permis sp\u00e9ciaux\u00a0?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.kdmsteel.com\/fr\/reservoir-atmospherique-vs-reservoir-sous-pression\/#Why_do_pressure_tanks_need_pressure_relief_devices\" >Pourquoi les r\u00e9servoirs sous pression ont-ils besoin de dispositifs de d\u00e9compression\u00a0?<\/a><\/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\/reservoir-atmospherique-vs-reservoir-sous-pression\/#Can_temperature_affect_pressure_inside_a_storage_tank\" >La temp\u00e9rature peut-elle affecter la pression \u00e0 l&#039;int\u00e9rieur d&#039;un r\u00e9servoir de stockage\u00a0?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.kdmsteel.com\/fr\/reservoir-atmospherique-vs-reservoir-sous-pression\/#How_often_are_atmospheric_tanks_inspected\" >\u00c0 quelle fr\u00e9quence les r\u00e9servoirs atmosph\u00e9riques sont-ils inspect\u00e9s\u00a0?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.kdmsteel.com\/fr\/reservoir-atmospherique-vs-reservoir-sous-pression\/#Can_all_the_tanks_that_are_not_within_the_pressure_vessel_category_be_used_safely_in_high-pressure_environments\" >Tous les r\u00e9servoirs qui n&#039;appartiennent pas \u00e0 la cat\u00e9gorie des r\u00e9cipients sous pression peuvent-ils \u00eatre utilis\u00e9s en toute s\u00e9curit\u00e9 dans des environnements \u00e0 haute pression\u00a0?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.kdmsteel.com\/fr\/reservoir-atmospherique-vs-reservoir-sous-pression\/#Get_Your_Customized_Tanks_by_KDM_Steel\" >Obtenez vos r\u00e9servoirs personnalis\u00e9s chez KDM Steel<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_is_an_Atmospheric_Tank\"><\/span><b>Qu&#039;est-ce qu&#039;un r\u00e9servoir atmosph\u00e9rique\u00a0?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-49185\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-63.png\" alt=\"\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-63.png 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-63-150x84.png 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-63-768x432.png 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-63-18x10.png 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Les liquides sont maintenus \u00e0 pression atmosph\u00e9rique dans un<\/span><a href=\"https:\/\/www.sciencedirect.com\/topics\/engineering\/atmospheric-tanks\"> <span style=\"font-weight: 400;\">r\u00e9servoir atmosph\u00e9rique<\/span><\/a><span style=\"font-weight: 400;\">. <\/span><span style=\"font-weight: 400;\">Il fonctionne \u00e0 une pression atmosph\u00e9rique ou proche de celle-ci, g\u00e9n\u00e9ralement inf\u00e9rieure \u00e0 1 psi, et jusqu&#039;\u00e0 2,5 psi lorsqu&#039;il est con\u00e7u conform\u00e9ment \u00e0 l&#039;annexe F de l&#039;API 650. <\/span><span style=\"font-weight: 400;\">Les concepteurs utilisent des syst\u00e8mes de ventilation pour \u00e9viter les surpressions ou les variations de temp\u00e9rature. Les ing\u00e9nieurs utilisent des r\u00e9servoirs atmosph\u00e9riques pour stocker l&#039;eau, les carburants et\u2026 <\/span><span style=\"font-weight: 400;\">produits chimiques ne n\u00e9cessitant pas de stockage sous pression.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_is_a_Pressure_Tank\"><\/span><b>Qu&#039;est-ce qu&#039;un r\u00e9servoir sous pression ?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-49186\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-64.png\" alt=\"\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-64.png 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-64-150x84.png 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-64-768x432.png 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-64-18x10.png 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Les fluides sont contenus dans un r\u00e9servoir sous pression \u00e0 des pressions bien sup\u00e9rieures \u00e0 la pression atmosph\u00e9rique. <\/span><span style=\"font-weight: 400;\">Dans des conditions normales de service, il fonctionne \u00e0 des pressions sup\u00e9rieures \u00e0 <\/span><span style=\"font-weight: 400;\">15<\/span><span style=\"font-weight: 400;\"> psi<\/span><span style=\"font-weight: 400;\">. Les ing\u00e9nieurs con\u00e7oivent des r\u00e9servoirs sous pression \u00e0 parois renforc\u00e9es afin de g\u00e9rer en toute s\u00e9curit\u00e9 les contraintes internes. Ces r\u00e9servoirs sont destin\u00e9s au transport de gaz, de vapeur et de liquides volatils, conform\u00e9ment aux normes ASME relatives aux appareils \u00e0 pression.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Major_Differences_between_Atmospheric_Tank_and_Pressure_Tank\"><\/span><b>Principales diff\u00e9rences entre un r\u00e9servoir atmosph\u00e9rique et un r\u00e9servoir sous pression<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-49187\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/Untitled-design-2.png\" alt=\"\" width=\"1920\" height=\"1080\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/Untitled-design-2.png 1920w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/Untitled-design-2-150x84.png 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/Untitled-design-2-768x432.png 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/Untitled-design-2-1536x864.png 1536w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/Untitled-design-2-18x10.png 18w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"1_Operating_Pressure\"><\/span><b>1. <\/b><b>Pression de service<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 <\/span> <b>R\u00e9servoir atmosph\u00e9rique :<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Les r\u00e9servoirs atmosph\u00e9riques fonctionnent \u00e0 une pression proche de la pression ambiante, et la pression de conception est maintenue en dessous de 1 psi. <\/span><span style=\"font-weight: 400;\">La coque est rigidifi\u00e9e uniquement pour r\u00e9sister aux charges de pression hydrostatique.<\/span> <span style=\"font-weight: 400;\">Les normes de conception n&#039;imposent pas aux r\u00e9servoirs atmosph\u00e9riques une pression interne \u00e9lev\u00e9e et constante, car ces r\u00e9servoirs sont con\u00e7us pour contenir des liquides \u00e0 faible volatilit\u00e9.<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 <\/span> <b>R\u00e9servoir sous pression :<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Les r\u00e9servoirs sous pression fonctionnent \u00e0 des pressions sup\u00e9rieures \u00e0 la pression atmosph\u00e9rique et sont soumis \u00e0 une pression maximale admissible de service (PMA). Les contraintes circonf\u00e9rentielles et longitudinales, dues \u00e0 la pression interne, doivent \u00eatre calcul\u00e9es en fonction de l&#039;\u00e9paisseur de la paroi et de l&#039;efficacit\u00e9 des joints. Les normes imposent que le r\u00e9servoir soit dimensionn\u00e9 pour une PMA maintenue en fonctionnement normal.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_Design_and_Construction_Standards\"><\/span><b>2. <\/b><b>Normes de conception et de construction<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 <\/span> <b>R\u00e9servoir atmosph\u00e9rique :<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Les r\u00e9servoirs atmosph\u00e9riques sont con\u00e7us conform\u00e9ment aux<\/span><a href=\"https:\/\/kdmfab.com\/api-650-tank\/\"><span style=\"font-weight: 400;\"> API 650<\/span><\/a><span style=\"font-weight: 400;\">. <\/span><span style=\"font-weight: 400;\">Le code suppose une pression interne n\u00e9gligeable en fonctionnement normal. <\/span><span style=\"font-weight: 400;\">Le calcul de l&#039;\u00e9paisseur de la coque repose sur la densit\u00e9 du liquide et la hauteur de remplissage. La structure de la toiture ne r\u00e9siste qu&#039;\u00e0 la pouss\u00e9e d&#039;Archim\u00e8de due au vent et \u00e0 la dilatation thermique. <\/span><span style=\"font-weight: 400;\">Des calculs de contraintes dus au vent et aux charges sismiques sont n\u00e9cessaires, mais les formules de contrainte de pression interne ne sont pas applicables.<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 <\/span> <b>R\u00e9servoir sous pression :<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Les r\u00e9servoirs sous pression sont construits conform\u00e9ment au code de construction ASME relatif aux chaudi\u00e8res et appareils \u00e0 pression. La principale charge de calcul prise en compte par ce code est la pression interne. Les valeurs de contrainte admissible et les coefficients d&#039;efficacit\u00e9 des joints sont utilis\u00e9s pour le calcul de l&#039;\u00e9paisseur de la paroi. <\/span><span style=\"font-weight: 400;\">La fabrication requiert des proc\u00e9dures de soudage qualifi\u00e9es et des essais hydrostatiques obligatoires.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_Venting_vs_Sealing\"><\/span><b>3. <\/b><b>Ventilation vs \u00e9tanch\u00e9it\u00e9<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 <\/span> <b>R\u00e9servoir atmosph\u00e9rique :<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Les r\u00e9servoirs atmosph\u00e9riques sont \u00e9quip\u00e9s d&#039;\u00e9vents normaux et de secours afin d&#039;\u00e9viter que la pression interne ne d\u00e9passe les limites de conception. L&#039;\u00e9vent de secours est consid\u00e9r\u00e9 comme une source de chaleur en cas d&#039;incendie, conform\u00e9ment \u00e0 la norme API 2000. Des \u00e9vents obstru\u00e9s peuvent provoquer un soul\u00e8vement de la toiture, m\u00eame \u00e0 faible pression diff\u00e9rentielle.<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 <\/span> <b>R\u00e9servoir sous pression :<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Les r\u00e9servoirs sous pression sont des syst\u00e8mes ferm\u00e9s \u00e9quip\u00e9s de soupapes de s\u00fbret\u00e9 dont la pression ne descend pas en dessous de la pression maximale admissible (PMA). Ces dispositifs de s\u00fbret\u00e9 ne s&#039;ouvrent qu&#039;en cas de surpression d\u00e9passant les limites de conception. La r\u00e9glementation ASME impose un dimensionnement certifi\u00e9 des soupapes afin de pr\u00e9venir toute augmentation de pression en cas de d\u00e9faillance ou d&#039;incendie.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"4_Material_and_Structural_Requirements\"><\/span><b>4. <\/b><b>Exigences en mati\u00e8re de mat\u00e9riaux et de structure<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 <\/span> <b>R\u00e9servoir atmosph\u00e9rique :<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Les plaques d&#039;acier au carbone avec une limite d&#039;\u00e9lasticit\u00e9 ad\u00e9quate (par exemple, \u2265250 MPa) sont couramment utilis\u00e9es.<\/span><span style=\"font-weight: 400;\"> La conception structurelle assure la r\u00e9sistance aux forces hydrostatiques de face et aux charges sismiques. L&#039;\u00e9paisseur des plaques est augment\u00e9e en fonction de la hauteur du liquide, et non en modifiant les calculs de contrainte de pression.<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 <\/span> <b>R\u00e9servoir sous pression :<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Les r\u00e9servoirs sous pression sont fabriqu\u00e9s en aciers au carbone ou alli\u00e9s r\u00e9sistants \u00e0 la pression et pr\u00e9sentant des caract\u00e9ristiques de traction et de r\u00e9sistance aux chocs r\u00e9glement\u00e9es. Le choix des mat\u00e9riaux repose sur les niveaux de contrainte admissibles, eux-m\u00eames d\u00e9termin\u00e9s par la temp\u00e9rature de conception. <\/span><span style=\"font-weight: 400;\">L&#039;\u00e9paisseur de la coque est d\u00e9termin\u00e9e par la pression interne, la contrainte admissible et l&#039;efficacit\u00e9 des joints. La hauteur de colonne d&#039;eau est un param\u00e8tre secondaire.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"5_Safety_and_Risk_Profile\"><\/span><b>5. <\/b><b>Profil de s\u00e9curit\u00e9 et de risque<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 <\/span> <b>R\u00e9servoir atmosph\u00e9rique :<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Les r\u00e9servoirs situ\u00e9s dans l&#039;atmosph\u00e8re sont moins vuln\u00e9rables \u00e0 la pression interne mais plus vuln\u00e9rables au d\u00e9gagement de vapeurs.<\/span> <span style=\"font-weight: 400;\">Il s&#039;agit d&#039;incendies dus au soul\u00e8vement du toit, au flambage de la coque et aux joints d&#039;\u00e9tanch\u00e9it\u00e9 p\u00e9riph\u00e9riques.<\/span> <span style=\"font-weight: 400;\">La faible pression de fonctionnement permet de concevoir une solution minimisant l&#039;\u00e9nergie stock\u00e9e.<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 <\/span> <b>R\u00e9servoir sous pression :<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Du fait de leur pression de service \u00e9lev\u00e9e, les r\u00e9servoirs sous pression emmagasinent une \u00e9nergie interne consid\u00e9rable. Une d\u00e9faillance peut entra\u00eener une d\u00e9composition rapide, une fragmentation et une explosion. Les normes exigent la mise en place de coefficients de s\u00e9curit\u00e9, de syst\u00e8mes de d\u00e9compression, ainsi que des inspections r\u00e9guli\u00e8res afin de g\u00e9rer les risques de rupture catastrophique et de fatigue.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"6_Installation_and_Support_Systems\"><\/span><b>6. <\/b><b>Syst\u00e8mes d&#039;installation et de support<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 <\/span> <b>R\u00e9servoir atmosph\u00e9rique :<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Les r\u00e9servoirs atmosph\u00e9riques reposent sur des fondations annulaires ou sur dalles con\u00e7ues pour supporter des charges hydrostatiques.<\/span><span style=\"font-weight: 400;\"> La conception des fondations est d\u00e9termin\u00e9e par les grands diam\u00e8tres des r\u00e9servoirs gr\u00e2ce \u00e0 l&#039;utilisation des limites de tassement diff\u00e9rentiel. Les poutres de renfort r\u00e9sistent aux forces lat\u00e9rales du vent, car la pression interne n&#039;apporte pas de rigidification structurelle.<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 <\/span> <b>R\u00e9servoir sous pression :<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Les r\u00e9servoirs sous pression sont mont\u00e9s sur des jupes, des selles ou des pattes de fixation qui supportent les charges de pouss\u00e9e et les charges thermiques. Les syst\u00e8mes de support r\u00e9sistent aux acc\u00e9l\u00e9rations sismiques et aux forces de pression axiale. Des boulons d&#039;ancrage emp\u00eachent le soul\u00e8vement d\u00fb \u00e0 la pression interne en conditions normales et en cas de perturbation.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"7_Shape_and_Structural_Form\"><\/span><b>7. <\/b><b>Forme et structure<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 <\/span> <b>R\u00e9servoir atmosph\u00e9rique :<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Les r\u00e9servoirs atmosph\u00e9riques sont constitu\u00e9s d&#039;une enveloppe cylindrique \u00e0 paroi mince de grand diam\u00e8tre, surmont\u00e9e d&#039;un toit conique plat ou en forme de d\u00f4me. La faible pression interne permet des conceptions de hauteur limit\u00e9e. La stabilit\u00e9 de l&#039;enveloppe ne repose pas sur la r\u00e9partition des contraintes de pression, mais sur les rapports entre le diam\u00e8tre et l&#039;\u00e9paisseur, ainsi que sur la hauteur d&#039;eau.<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 <\/span> <b>R\u00e9servoir sous pression :<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Les r\u00e9servoirs sous pression utilisent une g\u00e9om\u00e9trie cylindrique ou sph\u00e9rique pour contenir efficacement la pression interne. Les formes sph\u00e9riques assurent une r\u00e9partition uniforme des contraintes\u00a0; les parois cylindriques n\u00e9cessitent des fonds bomb\u00e9s pour minimiser les concentrations de contraintes aux extr\u00e9mit\u00e9s.<\/span><span style=\"font-weight: 400;\"> Les fonds bomb\u00e9s \u00e9liminent la concentration des contraintes aux jonctions des coques. Gr\u00e2ce \u00e0 des rapports diam\u00e8tre\/\u00e9paisseur r\u00e9duits, une pression interne \u00e9lev\u00e9e peut \u00eatre contenue en toute s\u00e9curit\u00e9, avec un comportement de d\u00e9formation pr\u00e9visible.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"8_Regulatory_and_Inspection_Requirements\"><\/span><b>8. <\/b><b>Exigences r\u00e9glementaires et d&#039;inspection<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 <\/span> <b>R\u00e9servoir atmosph\u00e9rique :<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Les r\u00e9servoirs atmosph\u00e9riques sont inspect\u00e9s conform\u00e9ment \u00e0 la norme API 653. Les inspections portent sur la corrosion de la paroi, l&#039;amincissement du fond et le tassement. Les inspections internes sont r\u00e9alis\u00e9es \u00e0 intervalles plus espac\u00e9s, la pression de service \u00e9tant inf\u00e9rieure \u00e0 1 psi et le niveau d&#039;\u00e9nergie stock\u00e9e \u00e9tant faible.<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 <\/span> <b>R\u00e9servoir sous pression :<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">L&#039;inspection des r\u00e9servoirs sous pression est <\/span><span style=\"font-weight: 400;\">conform\u00e9ment \u00e0<\/span><a href=\"https:\/\/www.asme.org\/codes-standards\/bpvc-standards\"> <span style=\"font-weight: 400;\">Code ASME des chaudi\u00e8res et appareils \u00e0 pression<\/span><\/a> <span style=\"font-weight: 400;\">exigences et r\u00e9glementations juridictionnelles.<\/span><span style=\"font-weight: 400;\"> L&#039;inspection porte sur l&#039;\u00e9valuation des limites de pression et les essais des soupapes de s\u00fbret\u00e9. <\/span><span style=\"font-weight: 400;\">Une pression de fonctionnement plus \u00e9lev\u00e9e exige des intervalles d&#039;inspection plus courts et des \u00e9valuations d&#039;int\u00e9grit\u00e9 plus rigoureuses.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"9_Cost_Considerations\"><\/span><b>9. <\/b><b>Consid\u00e9rations relatives aux co\u00fbts<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 <\/span> <b>R\u00e9servoir atmosph\u00e9rique :<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Les r\u00e9servoirs atmosph\u00e9riques sont moins co\u00fbteux en raison de leur faible pression de conception et de la finesse de leurs parois. L&#039;\u00e9paisseur courante des parois se situe entre 6 et 25 mm. Le soudage est r\u00e9alis\u00e9 sans contr\u00f4le radiographique complet. Des inspections moins fr\u00e9quentes permettent de r\u00e9duire les co\u00fbts de maintenance et de mise en conformit\u00e9 \u00e0 long terme.<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 <\/span> <b>R\u00e9servoir sous pression :<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">L&#039;utilisation de parois plus \u00e9paisses, pouvant d\u00e9passer 30 mm sous haute pression, rench\u00e9rit le co\u00fbt des r\u00e9servoirs sous pression. Le recours \u00e0 des mat\u00e9riaux de haute qualit\u00e9 et les exigences d&#039;efficacit\u00e9 combin\u00e9e complexifient \u00e9galement leur fabrication. Les co\u00fbts li\u00e9s \u00e0 la radiographie, aux essais hydrostatiques et aux syst\u00e8mes de d\u00e9charge sont obligatoires et augmentent le co\u00fbt initial ainsi que les co\u00fbts d&#039;inspection \u00e0 long terme.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"10_Typical_Uses_and_Applications\"><\/span><b>10. Utilisations et applications typiques<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 <\/span> <b>R\u00e9servoir atmosph\u00e9rique :<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Les r\u00e9servoirs atmosph\u00e9riques permettent de stocker de grandes quantit\u00e9s de liquides peu volatils comme les produits chimiques, le p\u00e9trole brut, l&#039;eau, etc., \u00e0 une pression de service inf\u00e9rieure \u00e0 1 psi. Ils conviennent au stockage en vrac \u00e0 d\u00e9bit constant et sans confinement de pression.<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 <\/span> <b>R\u00e9servoir sous pression :<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Les ing\u00e9nieurs utilisent des r\u00e9servoirs sous pression dans les secteurs et proc\u00e9d\u00e9s n\u00e9cessitant le stockage sous pression de gaz, de vapeur et de liquides volatils, et exigeant un contr\u00f4le maximal. Ces r\u00e9servoirs fonctionnent fr\u00e9quemment \u00e0 des pressions sup\u00e9rieures \u00e0 15 psi. Ils peuvent \u00e9galement servir de r\u00e9acteurs et de cuves tampons., <\/span><span style=\"font-weight: 400;\">o\u00f9 le confinement de la pression est requis.<\/span><b>\u00a0<\/b><\/p>\n<table>\n<tbody>\n<tr>\n<td><b>Param\u00e8tre<\/b><\/td>\n<td><b>R\u00e9servoir atmosph\u00e9rique<\/b><\/td>\n<td><b>R\u00e9servoir sous pression<\/b><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Pression de service<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Proche de la pression atmosph\u00e9rique (\u22641\u20132,5 psig)<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Au-dessus de 15 psig<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Charge de conception d\u00e9terminante<\/span><\/td>\n<td><span style=\"font-weight: 400;\">pression hydrostatique du liquide<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Pression interne<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Code de conception<\/span><\/td>\n<td><span style=\"font-weight: 400;\">API 650<\/span><\/td>\n<td><span style=\"font-weight: 400;\">ASME Section VIII<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Ventilation<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Syst\u00e8me ouvert\/ventil\u00e9<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Syst\u00e8me ferm\u00e9 avec soupapes de d\u00e9charge<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Base d&#039;\u00e9paisseur de la coquille<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Hauteur du liquide et densit\u00e9 relative<\/span><\/td>\n<td><span style=\"font-weight: 400;\">MAWP et contrainte admissible<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Forme structurelle<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Paroi mince de grand diam\u00e8tre<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Cylindrique\/sph\u00e9rique \u00e0 paroi \u00e9paisse<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u00c9nergie stock\u00e9e<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Faible<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Haut<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Norme d&#039;inspection<\/span><\/td>\n<td><span style=\"font-weight: 400;\">API 653<\/span><\/td>\n<td><span style=\"font-weight: 400;\">API 510 \/ NBIC<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Complexit\u00e9 de fabrication<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Mod\u00e9r\u00e9<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\u00c9lev\u00e9 (CND et essai hydrostatique requis)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Service typique<\/span><\/td>\n<td><span style=\"font-weight: 400;\">stockage de liquides en vrac<\/span><\/td>\n<td><span style=\"font-weight: 400;\">confinement des gaz\/fluides volatils<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><span class=\"ez-toc-section\" id=\"Atmospheric_Tank_vs_Pressure_Tank_%E2%80%93_Which_One_Is_Best\"><\/span><b>R\u00e9servoir atmosph\u00e9rique ou r\u00e9servoir sous pression\u00a0: lequel est le meilleur\u00a0?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-49188\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-65.png\" alt=\"\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-65.png 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-65-150x84.png 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-65-768x432.png 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-65-18x10.png 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Un r\u00e9servoir atmosph\u00e9rique est optimal pour le stockage de liquides peu volatils et sous une pression interne n\u00e9gligeable. Ces r\u00e9servoirs sont sp\u00e9cifiquement con\u00e7us pour minimiser les contraintes de pression et l&#039;\u00e9nergie de rupture. Le stockage de grand volume gr\u00e2ce \u00e0 une construction de grand diam\u00e8tre pr\u00e9sente des exigences de fabrication moins complexes. Ils sont largement utilis\u00e9s dans les applications o\u00f9 la ma\u00eetrise de la ventilation, la tol\u00e9rance \u00e0 la corrosion et la tol\u00e9rance au tassement sont les facteurs d\u00e9terminants de la performance, et non le confinement de la pression.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">La conception des r\u00e9servoirs sous pression vise \u00e0 garantir la gestion de l&#039;\u00e9nergie stock\u00e9e gr\u00e2ce \u00e0 une \u00e9paisseur de paroi calcul\u00e9e et \u00e0 des syst\u00e8mes de d\u00e9charge performants. Ils permettent une conception compacte et une grande pr\u00e9cision de contr\u00f4le. Leur s\u00e9lection d\u00e9pendra des marges de pression admissibles, des exigences de s\u00e9curit\u00e9 et de conformit\u00e9 r\u00e9glementaire.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"FAQs\"><\/span><b>FAQ<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Can_an_atmospheric_tank_be_considered_a_pressure_vessel\"><\/span><b>Un r\u00e9servoir atmosph\u00e9rique peut-il \u00eatre consid\u00e9r\u00e9 comme un r\u00e9cipient sous pression\u00a0?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Les r\u00e9servoirs atmosph\u00e9riques doivent \u00eatre construits \u00e0 des pressions limit\u00e9es \u00e0 1 psi, bien qu&#039;elles puissent atteindre 2,5 psi lorsqu&#039;ils sont construits selon l&#039;annexe F de la norme API 650.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_shapes_are_common_for_pressure_vessels\"><\/span><b>Quelles sont les formes courantes des r\u00e9cipients sous pression ?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Les r\u00e9cipients sous pression sont g\u00e9n\u00e9ralement de forme cylindrique, avec des extr\u00e9mit\u00e9s bomb\u00e9es ou sph\u00e9riques. Ces formes permettent une r\u00e9partition uniforme des contraintes de pression internes.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Are_there_atmospheric_tanks_controlled\"><\/span><b>Existe-t-il des r\u00e9servoirs atmosph\u00e9riques contr\u00f4l\u00e9s\u00a0?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Oui. La norme API 650 r\u00e9git les r\u00e9servoirs atmosph\u00e9riques, et la norme API 653, les fait inspecter.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_an_atmospheric_tank_require_special_permits\"><\/span><b>Un r\u00e9servoir atmosph\u00e9rique peut-il n\u00e9cessiter des permis sp\u00e9ciaux\u00a0?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Oui. Les r\u00e9servoirs atmosph\u00e9riques peuvent n\u00e9cessiter des autorisations sp\u00e9ciales, qui d\u00e9pendent de leur taille, de leur emplacement et du type de liquide \u00e0 stocker.\u00a0<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Why_do_pressure_tanks_need_pressure_relief_devices\"><\/span><b>Pourquoi les r\u00e9servoirs sous pression ont-ils besoin de dispositifs de d\u00e9compression\u00a0?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Les dispositifs de d\u00e9charge vous aideront \u00e0 emp\u00eacher la pression interne de d\u00e9passer la pression maximale admissible en cas d&#039;incendie.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_temperature_affect_pressure_inside_a_storage_tank\"><\/span><b>La temp\u00e9rature peut-elle affecter la pression \u00e0 l&#039;int\u00e9rieur d&#039;un r\u00e9servoir de stockage\u00a0?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">En particulier dans les r\u00e9servoirs sous pression ferm\u00e9s, si vous augmentez la temp\u00e9rature, la pression de vapeur et la pression interne augmenteront.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_often_are_atmospheric_tanks_inspected\"><\/span><b>\u00c0 quelle fr\u00e9quence les r\u00e9servoirs atmosph\u00e9riques sont-ils inspect\u00e9s\u00a0?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Les r\u00e9servoirs atmosph\u00e9riques doivent \u00eatre inspect\u00e9s tous les 5 \u00e0 10 ans, selon leur taux de corrosion et les conditions d&#039;entretien.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_all_the_tanks_that_are_not_within_the_pressure_vessel_category_be_used_safely_in_high-pressure_environments\"><\/span><b>Tous les r\u00e9servoirs qui n&#039;appartiennent pas \u00e0 la cat\u00e9gorie des r\u00e9cipients sous pression peuvent-ils \u00eatre utilis\u00e9s en toute s\u00e9curit\u00e9 dans des environnements \u00e0 haute pression\u00a0?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Non. <\/span><span style=\"font-weight: 400;\">Les r\u00e9servoirs, qui ne peuvent r\u00e9sister \u00e0 la pression et qui manquent de soutien structurel, s&#039;effondreront lorsque la pression exerc\u00e9e sur eux d\u00e9passera les limites de conception.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Get_Your_Customized_Tanks_by_KDM_Steel\"><\/span><b>Obtenez vos r\u00e9servoirs 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-49189\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-66.png\" alt=\"\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-66.png 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-66-150x84.png 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-66-768x432.png 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/02\/ARTICLE-66-18x10.png 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Acier KDM<\/span> <span style=\"font-weight: 400;\">Nous concevons et fabriquons des r\u00e9servoirs atmosph\u00e9riques et sous pression en respectant scrupuleusement les normes et codes de conception. Nos solutions r\u00e9pondent aux exigences industrielles et garantissent la fiabilit\u00e9 de nos services, de la conception \u00e0 la livraison, en passant par la fabrication.<\/span><a href=\"https:\/\/www.kdmsteel.com\/fr\/contact\/\"> <span style=\"font-weight: 400;\">Contact<\/span><\/a> <span style=\"font-weight: 400;\">nous<\/span><span style=\"font-weight: 400;\"> et parlez de vos projets.<\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>Liquids in atmospheric tanks and pressure tanks are stored at very dissimilar operating conditions. Industrial purchasers and engineers must select the tank based on process requirements and safety codes. Incorrect selection increases lifecycle costs and downtime. This article compares the two tanks with respect to practical engineering requirements. What is an Atmospheric Tank? The liquids [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":49184,"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-49183","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 v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Atmospheric Tank vs Pressure Tank: Detailed Comparison for Engineers - 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\/reservoir-atmospherique-vs-reservoir-sous-pression\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Atmospheric Tank vs Pressure Tank: Detailed Comparison for Engineers - KDM Steel\" \/>\n<meta property=\"og:description\" content=\"Liquids in atmospheric tanks and pressure tanks are stored at very dissimilar operating conditions. 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Industrial purchasers and engineers must select the tank based on process requirements and safety codes. Incorrect selection increases lifecycle costs and downtime. This article compares the two tanks with respect to practical engineering requirements. What is an Atmospheric Tank? 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