{"id":3857,"date":"2024-07-29T12:40:07","date_gmt":"2024-07-29T12:40:07","guid":{"rendered":"https:\/\/sinovalveco.com\/?p=3857"},"modified":"2024-08-25T15:40:30","modified_gmt":"2024-08-25T15:40:30","slug":"understanding-the-differences-between-double-block-and-bleed-dbb-and-double-isolation-bleed-dib-valves","status":"publish","type":"post","link":"https:\/\/ntgdvalve.com\/fr\/understanding-the-differences-between-double-block-and-bleed-dbb-and-double-isolation-bleed-dib-valves\/","title":{"rendered":"Comprendre les diff\u00e9rences entre les robinets \u00e0 double blocage et purge (DBB) et les robinets \u00e0 double isolation et purge (DIB)"},"content":{"rendered":"<p>Dans le domaine de la conception, de la s\u00e9lection et de la s\u00e9curit\u00e9 industrielle des syst\u00e8mes de tuyauterie, il est essentiel de comprendre les distinctions entre les vannes \u00e0 double blocage et purge (DBB) et les vannes \u00e0 double isolation et purge (DIB). Ce blog a pour but d'\u00e9lucider les disparit\u00e9s fondamentales entre chaque type de vanne et de mettre en lumi\u00e8re leurs applications.<\/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=\"Toggle Table des mati\u00e8res\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #0a0a0a;color:#0a0a0a\" 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: #0a0a0a;color:#0a0a0a\" 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:\/\/ntgdvalve.com\/fr\/understanding-the-differences-between-double-block-and-bleed-dbb-and-double-isolation-bleed-dib-valves\/#Double_Block_and_Bleed_Valve_DBB\" >Vanne double de blocage et de purge (DBB)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/ntgdvalve.com\/fr\/understanding-the-differences-between-double-block-and-bleed-dbb-and-double-isolation-bleed-dib-valves\/#Double_Isolation_and_Bleed_Valve_DIB\" >Double vanne d'isolement et de purge (DIB)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/ntgdvalve.com\/fr\/understanding-the-differences-between-double-block-and-bleed-dbb-and-double-isolation-bleed-dib-valves\/#Differences_between_DBB_and_DIB_Valves\" >Diff\u00e9rences entre les soupapes DBB et DIB<\/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:\/\/ntgdvalve.com\/fr\/understanding-the-differences-between-double-block-and-bleed-dbb-and-double-isolation-bleed-dib-valves\/#DBB_Valve\" >Soupape DBB<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/ntgdvalve.com\/fr\/understanding-the-differences-between-double-block-and-bleed-dbb-and-double-isolation-bleed-dib-valves\/#DIB_Valve\" >Soupape DIB<\/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:\/\/ntgdvalve.com\/fr\/understanding-the-differences-between-double-block-and-bleed-dbb-and-double-isolation-bleed-dib-valves\/#Factors_to_Consider_When_Selecting_Between_DBB_and_DIB_Valves\" >Facteurs \u00e0 prendre en compte lors du choix entre les vannes DBB et DIB<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Double_Block_and_Bleed_Valve_DBB\"><\/span>Vanne double de blocage et de purge (DBB)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Une vanne DBB est con\u00e7ue pour am\u00e9liorer deux points d'isolation en ligne, cr\u00e9ant une barri\u00e8re entre les sections ascendantes et descendantes d'un syst\u00e8me de tuyauterie. Cela permet d'\u00e9viter la contamination crois\u00e9e ou la contamination entre deux flux de fluides. Couramment utilis\u00e9es dans les applications p\u00e9trochimiques, p\u00e9troli\u00e8res et gazi\u00e8res, les vannes DBB se composent de deux vannes d'arr\u00eat interconnect\u00e9es mais s\u00e9par\u00e9es et d'une ligne de purge interconnect\u00e9e.<\/p>\n<p>Dans la premi\u00e8re \u00e9tape, une vanne d'isolation assure une fermeture parfaite du fluide en amont, l'emp\u00eachant de s'\u00e9couler en aval. La deuxi\u00e8me \u00e9tape utilise une autre vanne d'isolation pour cr\u00e9er une barri\u00e8re suppl\u00e9mentaire, tandis qu'une ligne de purge relie les deux vannes pour \u00e9vacuer l'humidit\u00e9 ou la pression du syst\u00e8me. Le choix d'une vanne DBB est crucial, en particulier lors de la manipulation de fluides dangereux et volatils, car l'absence de communication entre les fluides en amont et en aval est essentielle pour la s\u00e9curit\u00e9.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-3858 aligncenter\" src=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2024\/01\/QQ\u622a\u56fe20240131161034.jpg\" alt=\"\" width=\"895\" height=\"624\" srcset=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2024\/01\/QQ\u622a\u56fe20240131161034.jpg 895w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2024\/01\/QQ\u622a\u56fe20240131161034-600x418.jpg 600w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2024\/01\/QQ\u622a\u56fe20240131161034-768x535.jpg 768w\" sizes=\"(max-width: 895px) 100vw, 895px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Double_Isolation_and_Bleed_Valve_DIB\"><\/span>Double vanne d'isolement et de purge (DIB)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>La vanne DIB est une vanne sp\u00e9cialis\u00e9e utilis\u00e9e dans les syst\u00e8mes de tuyauterie, combinant la d\u00e9charge de pression et l'isolation en deux \u00e9tapes. Elle permet une fermeture rapide, en particulier pour le transport de fluides dangereux. Largement utilis\u00e9e dans les usines de gaz et de p\u00e9trole, les entrep\u00f4ts frigorifiques, les processus industriels et les centrales nucl\u00e9aires, la phase int\u00e9rieure sert de point d'isolation principal, isolant compl\u00e8tement le fluide et le syst\u00e8me. Le deuxi\u00e8me \u00e9tage se compose de deux points d'\u00e9vacuation distincts qui permettent de rel\u00e2cher la pression en toute s\u00e9curit\u00e9 du c\u00f4t\u00e9 aval, \u00e9vitant ainsi les probl\u00e8mes de s\u00e9curit\u00e9.<\/p>\n<p>Les vannes DIB, g\u00e9n\u00e9ralement fabriqu\u00e9es \u00e0 partir de mat\u00e9riaux anticorrosifs tels que l'acier inoxydable et l'acier au carbone, ont une dur\u00e9e de vie plus longue. Leurs volumes internes sont con\u00e7us pour \u00e9liminer le besoin de grands r\u00e9servoirs de drainage ou de confinement, ce qui les rend adapt\u00e9es aux espaces d'installation limit\u00e9s.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Differences_between_DBB_and_DIB_Valves\"><\/span>Diff\u00e9rences entre les soupapes DBB et DIB<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Les vannes DBB et DIB jouent toutes deux un r\u00f4le essentiel dans l'industrie du gaz et du p\u00e9trole, en contr\u00f4lant le d\u00e9bit des fluides dans les syst\u00e8mes de traitement et les pipelines. Il est essentiel de comprendre les principales diff\u00e9rences entre ces deux types de vannes pour choisir celle qui convient le mieux \u00e0 une application sp\u00e9cifique :<\/p>\n<h3><span class=\"ez-toc-section\" id=\"DBB_Valve\"><\/span>Soupape DBB<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>Fonctionne avec deux \u00e9l\u00e9ments de fermeture et une vanne de purge entre les deux, cr\u00e9ant ainsi un double dispositif de blocage et de purge pour l'isolation.<\/li>\n<li>Utilise deux chambres scell\u00e9es pour des caract\u00e9ristiques de s\u00e9curit\u00e9 accrues.<\/li>\n<li>Complexe et de grande taille, il occupe un large espace d'installation.<\/li>\n<li>La soupape de purge lib\u00e8re la pression accumul\u00e9e pour une ouverture et une fermeture en toute s\u00e9curit\u00e9.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"DIB_Valve\"><\/span>Soupape DIB<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>Utilise un seul joint pour l'isolation, ce qui permet une conception plus simple et plus \u00e9conomique que le DBB.<\/li>\n<li>De taille r\u00e9duite, il convient aux installations dont l'espace est limit\u00e9.<\/li>\n<li>Fonctionne avec trois \u00e9l\u00e9ments de fermeture et une vanne de purge.<\/li>\n<li>Fournit un niveau d'isolation suppl\u00e9mentaire, adapt\u00e9 aux zones o\u00f9 les fuites pourraient avoir des cons\u00e9quences graves.<\/li>\n<\/ul>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-3861 aligncenter\" src=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2024\/01\/image003.png\" alt=\"\" width=\"534\" height=\"240\" \/><\/p>\n<p style=\"text-align: center;\"><strong>Figure :<\/strong> Sch\u00e9ma de la valve DBB \u00e0 gauche et de la valve DIB \u00e0 droite.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Factors_to_Consider_When_Selecting_Between_DBB_and_DIB_Valves\"><\/span>Facteurs \u00e0 prendre en compte lors du choix entre les vannes DBB et DIB<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ol>\n<li><strong>Espace disponible :<\/strong> Tenir compte des contraintes d'espace pour l'installation.<\/li>\n<li><strong>Niveau de s\u00e9curit\u00e9 requis :<\/strong> \u00c9valuez l'importance de l'isolation et de la s\u00e9curit\u00e9 dans votre application.<\/li>\n<li><strong>Contraintes budg\u00e9taires :<\/strong> \u00c9valuer la faisabilit\u00e9 \u00e9conomique de chaque type de vanne.<\/li>\n<li><strong>Avantages et caract\u00e9ristiques sp\u00e9cifiques :<\/strong> Comprendre les avantages uniques offerts par les soupapes DBB et DIB.<\/li>\n<\/ol>\n<p>En conclusion, une compr\u00e9hension compl\u00e8te des nuances de ces vannes vous permet de prendre des d\u00e9cisions \u00e9clair\u00e9es en fonction des exigences sp\u00e9cifiques de votre syst\u00e8me de tuyauterie.<\/p>","protected":false},"excerpt":{"rendered":"<p>In the realm of piping system design, selection, and industrial safety, comprehending the distinctions between Double Block and Bleed (DBB) [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":3859,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_eb_attr":"","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":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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