{"id":14666,"date":"2026-01-11T09:00:00","date_gmt":"2026-01-11T01:00:00","guid":{"rendered":"https:\/\/www.xintaivalves.com\/?p=14666"},"modified":"2026-02-04T09:34:12","modified_gmt":"2026-02-04T01:34:12","slug":"super-duplex-ball-valve-chloride-resistance","status":"publish","type":"post","link":"https:\/\/www.xintaivalves.com\/fr\/blog\/technical-science\/super-duplex-ball-valve-chloride-resistance\/","title":{"rendered":"Super Duplex 2507 pour vannes \u00e0 bille\u00a0: att\u00e9nuation de la fissuration par corrosion sous contrainte due aux chlorures"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 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 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.xintaivalves.com\/fr\/blog\/technical-science\/super-duplex-ball-valve-chloride-resistance\/#What_chloride_SCC_looks_like_in_real_systems\" >\u00c0 quoi ressemble la corrosion sous contrainte par les chlorures dans les syst\u00e8mes r\u00e9els<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.xintaivalves.com\/fr\/blog\/technical-science\/super-duplex-ball-valve-chloride-resistance\/#Why_%E2%80%9Cgood_stainless%E2%80%9D_still_fails\" >Pourquoi m\u00eame le \u201c bon acier inoxydable \u201d \u00e9choue<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.xintaivalves.com\/fr\/blog\/technical-science\/super-duplex-ball-valve-chloride-resistance\/#PREN_a_quick_way_to_compare_chloride_resistance\" >PREN : un moyen rapide de comparer la r\u00e9sistance au chlorure<\/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.xintaivalves.com\/fr\/blog\/technical-science\/super-duplex-ball-valve-chloride-resistance\/#What_higher_PREN_suggests\" >Que sugg\u00e8re un PREN plus \u00e9lev\u00e9 ?<\/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.xintaivalves.com\/fr\/blog\/technical-science\/super-duplex-ball-valve-chloride-resistance\/#How_to_use_PREN_in_procurement\" >Comment utiliser le PREN dans les achats<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.xintaivalves.com\/fr\/blog\/technical-science\/super-duplex-ball-valve-chloride-resistance\/#Where_super_duplex_2507_makes_sense\" >O\u00f9 le super duplex 2507 a du sens<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.xintaivalves.com\/fr\/blog\/technical-science\/super-duplex-ball-valve-chloride-resistance\/#Typical_%E2%80%9Cyes%E2%80%9D_scenarios\" >Sc\u00e9narios typiques de r\u00e9ponse \u201c oui \u201d<\/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.xintaivalves.com\/fr\/blog\/technical-science\/super-duplex-ball-valve-chloride-resistance\/#Typical_%E2%80%9Cmaybe%E2%80%9D_scenarios\" >Sc\u00e9narios typiques \u201c peut-\u00eatre \u201d<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.xintaivalves.com\/fr\/blog\/technical-science\/super-duplex-ball-valve-chloride-resistance\/#Valve_builds_choices_that_support_the_alloy\" >Valve propose des options qui prennent en charge l&#039;alliage<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.xintaivalves.com\/fr\/blog\/technical-science\/super-duplex-ball-valve-chloride-resistance\/#Spec_checks_that_prevent_expensive_surprises\" >Des v\u00e9rifications techniques pour \u00e9viter les mauvaises surprises<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.xintaivalves.com\/fr\/blog\/technical-science\/super-duplex-ball-valve-chloride-resistance\/#Conclusion\" >Conclusion<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.xintaivalves.com\/fr\/blog\/technical-science\/super-duplex-ball-valve-chloride-resistance\/#3_Key_Takeaways\" >3 points cl\u00e9s \u00e0 retenir<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.xintaivalves.com\/fr\/blog\/technical-science\/super-duplex-ball-valve-chloride-resistance\/#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-14\" href=\"https:\/\/www.xintaivalves.com\/fr\/blog\/technical-science\/super-duplex-ball-valve-chloride-resistance\/#What_is_Super_Duplex_2507_used_for\" >\u00c0 quoi sert le Super Duplex 2507 ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.xintaivalves.com\/fr\/blog\/technical-science\/super-duplex-ball-valve-chloride-resistance\/#What_is_chloride_stress_corrosion_cracking_SCC\" >Qu\u2019est-ce que la fissuration par corrosion sous contrainte due aux chlorures (SCC)\u00a0?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.xintaivalves.com\/fr\/blog\/technical-science\/super-duplex-ball-valve-chloride-resistance\/#Does_higher_PREN_always_mean_no_corrosion\" >Un PREN plus \u00e9lev\u00e9 signifie-t-il toujours l&#039;absence de corrosion\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.xintaivalves.com\/fr\/blog\/technical-science\/super-duplex-ball-valve-chloride-resistance\/#Is_duplex_always_better_than_standard_stainless\" >Le duplex est-il toujours meilleur que l&#039;inox standard\u00a0?<\/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.xintaivalves.com\/fr\/blog\/technical-science\/super-duplex-ball-valve-chloride-resistance\/#What_should_buyers_request_on_the_PO_to_control_risk\" >Que doivent demander les acheteurs sur le bon de commande pour ma\u00eetriser les risques\u00a0?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n\n<p class=\"wp-block-paragraph\">Les chlorures endommagent les vannes. Ils peuvent s&#039;infiltrer dans les moindres interstices, s&#039;accumuler sous les d\u00e9p\u00f4ts et, \u00e0 la longue, provoquer des fuites et des arr\u00eats impr\u00e9vus. Si votre syst\u00e8me est en contact avec de l&#039;eau de mer, de la saumure ou fait l&#039;objet de lavages fr\u00e9quents, le choix de l&#039;alliage influe directement sur le risque d&#039;indisponibilit\u00e9 et la charge de travail li\u00e9e \u00e0 la maintenance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Une vanne \u00e0 bille en acier inoxydable de qualit\u00e9 standard convient \u00e0 de nombreuses installations. Cependant, en pr\u00e9sence de fortes concentrations de chlorures, elle peut \u00eatre sensible \u00e0 la fissuration par corrosion sous contrainte (SCC). Les alliages duplex et super duplex sont souvent privil\u00e9gi\u00e9s car ils allient une meilleure r\u00e9sistance aux chlorures \u00e0 une m\u00e9canique plus \u00e9lev\u00e9e.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_chloride_SCC_looks_like_in_real_systems\"><\/span><strong>\u00c0 quoi ressemble la corrosion sous contrainte par les chlorures dans les syst\u00e8mes r\u00e9els<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_%E2%80%9Cgood_stainless%E2%80%9D_still_fails\"><\/span><strong>Pourquoi m\u00eame le \u201c bon acier inoxydable \u201d \u00e9choue<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">La fissuration sous contrainte (SCC) n&#039;est pas la m\u00eame chose que la rouille en g\u00e9n\u00e9ral. Il s&#039;agit d&#039;une fissuration qui peut se former lorsque trois facteurs sont r\u00e9unis\u00a0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Chlorures<\/strong> (eau de mer, saumure, air c\u00f4tier, rin\u00e7age)<\/li>\n\n\n\n<li><strong>Stresser<\/strong> (charges de pression, contraintes d&#039;assemblage, vibrations)<\/li>\n\n\n\n<li><strong>Temp\u00e9rature<\/strong> (tra\u00e7age thermique, cycles chaud\/froid, service \u00e0 temp\u00e9rature ambiante)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Dans le dessalement et l&#039;industrie p\u00e9troli\u00e8re et gazi\u00e8re offshore, ces conditions se chevauchent souvent, c&#039;est pourquoi les qualit\u00e9s duplex et super duplex sont courantes pour les applications en contact avec l&#039;eau de mer.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pour en savoir plus sur le positionnement de Xintai en mati\u00e8re d&#039;acier inoxydable et de duplex, voir\u00a0: <a href=\"https:\/\/www.xintaivalves.com\/fr\/custom-stainless-steel-ball-valves\/\">Vannes \u00e0 bille en acier inoxydable sur mesure<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"PREN_a_quick_way_to_compare_chloride_resistance\"><\/span><strong>PREN : un moyen rapide de comparer la r\u00e9sistance au chlorure<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">L&#039;indice PREN (Pitting Resistance Equivalent Number) est un indice simple utilis\u00e9 pour comparer la r\u00e9sistance \u00e0 la corrosion par piq\u00fbres et \u00e0 la corrosion caverneuse. Il est g\u00e9n\u00e9ralement \u00e9crit comme suit\u00a0:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>PREN = %Cr + 3,3\u00d7%Mo + 16\u00d7%N<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_higher_PREN_suggests\"><\/span><strong>Que sugg\u00e8re un PREN plus \u00e9lev\u00e9 ?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">En milieu chlor\u00e9, un PREN plus \u00e9lev\u00e9 indique souvent une meilleure r\u00e9sistance aux \u201c dommages pr\u00e9coces \u201d (piq\u00fbres\/crevasses) qui peuvent ult\u00e9rieurement contribuer aux fuites et aux fissures.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Plages de r\u00e9f\u00e9rence typiques pour les familles de duplex courantes\u00a0:<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Famille duplex (exemple de d\u00e9nomination)<\/strong><\/td><td><strong>Indicateur PREN typique<\/strong><\/td><\/tr><tr><td>Classe 2205 (duplex)<\/td><td>~30\u201338<\/td><\/tr><tr><td>Classe 2507 (super duplex)<\/td><td>&gt;40<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_use_PREN_in_procurement\"><\/span><strong>Comment utiliser le PREN dans les achats<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Utilisez PREN comme \u00e9tape de s\u00e9lection, puis confirmez les d\u00e9tails qui contr\u00f4lent r\u00e9ellement les performances\u00a0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Chimie sur les MTC (gammes Cr\/Mo\/N)<\/li>\n\n\n\n<li>\u00c9tat du traitement thermique<\/li>\n\n\n\n<li>Contr\u00f4les des proc\u00e9dures de soudage pour les nuances duplex<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Where_super_duplex_2507_makes_sense\"><\/span><strong>O\u00f9 le super duplex 2507 a du sens<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Le super duplex est particuli\u00e8rement utile lorsque la concentration en chlorures est \u00e9lev\u00e9e., <em>et<\/em> Le co\u00fbt de l&#039;\u00e9chec est \u00e9lev\u00e9.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Typical_%E2%80%9Cyes%E2%80%9D_scenarios\"><\/span><strong>Sc\u00e9narios typiques de r\u00e9ponse \u201c oui \u201d<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Conduites de prise d&#039;eau de mer et de saumure (dessalement)<\/li>\n\n\n\n<li>Installations de surface en mer, zones de projection d&#039;\u00e9claboussures et lavage au chlorure<\/li>\n\n\n\n<li>Service chimique avec des milieux contenant des chlorures<\/li>\n\n\n\n<li>Syst\u00e8mes \u00e0 vitesse plus \u00e9lev\u00e9e o\u00f9 le risque de crevasse augmente<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Typical_%E2%80%9Cmaybe%E2%80%9D_scenarios\"><\/span><strong>Sc\u00e9narios typiques \u201c peut-\u00eatre \u201d<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Chlorures intermittents \u00e0 basse temp\u00e9rature<\/li>\n\n\n\n<li>Services int\u00e9rieurs avec une chimie de l&#039;eau stable<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Si votre conception est \u00e9galement ax\u00e9e sur la pression, lisez\u00a0: <a href=\"https:\/\/www.xintaivalves.com\/fr\/blog\/everything-about-high-pressure-valves\/\">Tout savoir sur les vannes haute pression<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Valve_builds_choices_that_support_the_alloy\"><\/span><strong>Valve propose des options qui prennent en charge l&#039;alliage<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Le choix de l&#039;alliage est utile, mais la conception et la documentation restent les facteurs d\u00e9terminants pour la performance d&#039;une vanne sur le terrain.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Spec_checks_that_prevent_expensive_surprises\"><\/span><strong>Des v\u00e9rifications techniques pour \u00e9viter les mauvaises surprises<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Compatibilit\u00e9 du si\u00e8ge et du joint avec la saumure et les agents de nettoyage<\/li>\n\n\n\n<li>Contr\u00f4le des fissures (g\u00e9om\u00e9trie, drainage, d\u00e9p\u00f4ts)<\/li>\n\n\n\n<li>Documentation relative aux essais non destructifs et aux essais de pression<\/li>\n\n\n\n<li>Tra\u00e7abilit\u00e9 du num\u00e9ro de coul\u00e9e \u00e0 la vanne finie<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Si vous comparez les proc\u00e9d\u00e9s de fabrication, une vanne \u00e0 bille en acier forg\u00e9 peut constituer une excellente option lorsque l&#039;int\u00e9grit\u00e9 et la r\u00e9sistance \u00e0 la pression sont des crit\u00e8res essentiels. Voir\u00a0: <a href=\"https:\/\/www.xintaivalves.com\/fr\/blog\/ball-valve\/forged-ball-valves-vs-casting-ball-valves\/\">Vannes \u00e0 bille forg\u00e9es vs vannes \u00e0 bille moul\u00e9es<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pour un exemple de cat\u00e9gorie de produits, voir\u00a0: <a href=\"https:\/\/www.xintaivalves.com\/fr\/product\/forged-floating-ball-valve\/\">Vanne \u00e0 bille flottante forg\u00e9e<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">De plus, pour les applications \u00e0 forte teneur en chlorures et \u00e0 haute pression, les sp\u00e9cifications d&#039;une vanne \u00e0 bille haute pression doivent inclure la conception du si\u00e8ge, la capacit\u00e9 nominale du corps et les normes d&#039;essai, et pas seulement le choix de l&#039;alliage.<\/p>\n\n\n\n<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n  \n  <title>Produit phare<\/title>\n  <style>\n    .hero-card {\n      display: flex;\n      flex-wrap: wrap;\n      align-items: center;\n      background: #f7f8fa;\n      border-radius: 16px;\n      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);\n      padding: 24px;\n      max-width: 900px;\n      margin: 40px auto;\n      font-family: Arial, sans-serif;\n      text-decoration: none;\n      color: inherit;\n font-family: 'Poppins';\n    }\n\n    .hero-image {\n      width: 220px;\n      height: auto;\n      border-radius: 12px;\n      object-fit: cover;\n      flex-shrink: 0;\n    }\n\n    .hero-content {\n      padding-left: 24px;\n      flex: 1;\n      min-width: 260px;\n    }\n\n    .hero-title {\n      font-size: 1.6rem;\n      font-weight: bold;\n      margin-bottom: 12px;\n      color: #222;\n      font-family: 'Poppins',\n    }\n\n    .hero-description {\n      font-size: 1rem;\n      color: #555;\n      margin-bottom: 18px;\n    }\n\n    .hero-link {\n      display: inline-block;\n      padding: 10px 20px;\n      background-color: #D70C19;\n      color: #fff;\n      text-decoration: none;\n      border-radius: 8px;\n      font-weight: bold;\n      transition: background 0.2s ease-in-out;\n    }\n\n    .hero-link:hover {\n      background-color: #D70C19;\n    }\n\n    @media (max-width: 640px) {\n      .hero-card {\n        flex-direction: column;\n        text-align: center;\n      }\n\n      .hero-content {\n        padding-left: 0;\n        padding-top: 20px;\n      }\n\n      .hero-image {\n        width: 100%;\n        max-width: 280px;\n      }\n    }\n  <\/style>\n<\/head>\n<body>\n\n<a class=\"hero-card\" href=\"https:\/\/www.xintaivalves.com\/fr\/ball-valve-collection\/\" target=\"_blank\">\n  <img decoding=\"async\" class=\"hero-image\" src=\"https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2022\/01\/xt21-300x200.webp\" alt=\"Collecte de robinets \u00e0 tournant sph\u00e9rique\">\n  <div class=\"hero-content\">\n    <div class=\"hero-title\">Collecte de robinets \u00e0 tournant sph\u00e9rique<\/div>\n    <div class=\"hero-description\">D\u00e9couvrez notre collection de robinets \u00e0 boisseau sph\u00e9rique pour usage industriel. Certifi\u00e9s API et ISO, disponibles en acier moul\u00e9, acier inoxydable et laiton. Id\u00e9al pour les distributeurs et \u00e9quipementiers mondiaux.<\/div>\n    <span class=\"hero-link\">Voir le produit<\/span>\n  <\/div>\n<\/a>\n\n<\/body>\n<\/html>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><strong>Conclusion<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">L&#039;acier Super Duplex 2507 est souvent pr\u00e9conis\u00e9 pour r\u00e9duire les d\u00e9faillances li\u00e9es \u00e0 la corrosion en milieu chlor\u00e9. Il en r\u00e9sulte une diminution des fuites, des arr\u00eats d&#039;urgence et des cycles de remplacement plus longs dans des environnements qui endommagent les alliages standards.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En cas d&#039;exposition r\u00e9currente aux chlorures, une vanne \u00e0 bille en acier inoxydable de qualit\u00e9 super duplex est l&#039;un des moyens les plus directs de r\u00e9duire les risques de d\u00e9faillance dans les installations de dessalement et en mer.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Key_Takeaways\"><\/span><strong>3 points cl\u00e9s \u00e0 retenir<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>La corrosion sous contrainte due aux chlorures est provoqu\u00e9e par les chlorures, les contraintes et les cycles de temp\u00e9rature, et non par des \u00e9v\u00e9nements al\u00e9atoires.<\/li>\n\n\n\n<li>PREN permet de s\u00e9lectionner rapidement les alliages ; les qualit\u00e9s super duplex se situent g\u00e9n\u00e9ralement au-dessus de 40.<\/li>\n\n\n\n<li>La valeur \u00e0 long terme s&#039;am\u00e9liore lorsque l&#039;alliage, les d\u00e9tails de conception et la documentation correspondent au service.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-fe48e5de wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-white-color has-vivid-red-background-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/www.xintaivalves.com\/fr\/contact\/\" target=\"_blank\" rel=\"noreferrer noopener\">Obtenir un devis<\/a><\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"FAQs\"><\/span><strong>FAQ<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_Super_Duplex_2507_used_for\"><\/span><strong>\u00c0 quoi sert le Super Duplex 2507 ?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Il est couramment utilis\u00e9 dans les environnements riches en chlorures, tels que les syst\u00e8mes d&#039;eau de mer et les services de dessalement.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_chloride_stress_corrosion_cracking_SCC\"><\/span><strong>Qu\u2019est-ce que la fissuration par corrosion sous contrainte due aux chlorures (SCC)\u00a0?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Il s&#039;agit d&#039;une fissuration provoqu\u00e9e par l&#039;exposition aux chlorures et par une contrainte de traction, souvent acc\u00e9l\u00e9r\u00e9e par la temp\u00e9rature et les cycles.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Does_higher_PREN_always_mean_no_corrosion\"><\/span><strong>Un PREN plus \u00e9lev\u00e9 signifie-t-il toujours l&#039;absence de corrosion\u00a0?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Non. Le PREN est un guide pour la r\u00e9sistance \u00e0 la corrosion par piq\u00fbres et \u00e0 la corrosion caverneuse. Les performances d\u00e9pendent toujours de la chimie, de la temp\u00e9rature, des d\u00e9p\u00f4ts et des contr\u00f4les de fabrication.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Is_duplex_always_better_than_standard_stainless\"><\/span><strong>Le duplex est-il toujours meilleur que l&#039;inox standard\u00a0?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Pas toujours. Le duplex est particuli\u00e8rement avantageux lorsque la teneur en chlorures et le co\u00fbt des pannes sont \u00e9lev\u00e9s. Les qualit\u00e9s standard peuvent convenir pour des conditions d&#039;utilisation mod\u00e9r\u00e9es.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_should_buyers_request_on_the_PO_to_control_risk\"><\/span><strong>Que doivent demander les acheteurs sur le bon de commande pour ma\u00eetriser les risques\u00a0?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Certificats de conformit\u00e9 des mat\u00e9riaux (MTC), tra\u00e7abilit\u00e9 des num\u00e9ros de coul\u00e9e, normes d&#039;essai, exigences en mati\u00e8re de CND et sp\u00e9cifications claires des mat\u00e9riaux de si\u00e8ge\/joint.<\/p>","protected":false},"excerpt":{"rendered":"<p>Chlorides are hard on valves. They can sit in tight gaps, build up under deposits, and slowly create the kind of damage that leads to leaks and unplanned shutdowns. If your system handles seawater, brine, or frequent washdown, your alloy choice directly affects outage risk and maintenance workload. A stainless steel ball valve in standard [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":14667,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[306],"tags":[],"class_list":["post-14666","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-science"],"_links":{"self":[{"href":"https:\/\/www.xintaivalves.com\/fr\/wp-json\/wp\/v2\/posts\/14666","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xintaivalves.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xintaivalves.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xintaivalves.com\/fr\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xintaivalves.com\/fr\/wp-json\/wp\/v2\/comments?post=14666"}],"version-history":[{"count":2,"href":"https:\/\/www.xintaivalves.com\/fr\/wp-json\/wp\/v2\/posts\/14666\/revisions"}],"predecessor-version":[{"id":14724,"href":"https:\/\/www.xintaivalves.com\/fr\/wp-json\/wp\/v2\/posts\/14666\/revisions\/14724"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.xintaivalves.com\/fr\/wp-json\/wp\/v2\/media\/14667"}],"wp:attachment":[{"href":"https:\/\/www.xintaivalves.com\/fr\/wp-json\/wp\/v2\/media?parent=14666"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xintaivalves.com\/fr\/wp-json\/wp\/v2\/categories?post=14666"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xintaivalves.com\/fr\/wp-json\/wp\/v2\/tags?post=14666"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}