{"id":4097,"date":"2026-01-13T09:00:00","date_gmt":"2026-01-13T09:00:00","guid":{"rendered":"https:\/\/www.desopipe.com\/?p=4097"},"modified":"2026-02-06T03:44:35","modified_gmt":"2026-02-06T03:44:35","slug":"ppr-pipe-wall-thickness-sdr-vs-pn","status":"publish","type":"post","link":"https:\/\/www.desopipe.com\/fr\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/","title":{"rendered":"Comprendre la diff\u00e9rence entre SDR et PN\u00a0: Choisir l\u2019\u00e9paisseur de paroi appropri\u00e9e pour les tuyaux PPR destin\u00e9s \u00e0 un usage industriel"},"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.desopipe.com\/fr\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/#Why_SDR_and_PN_Are_Not_Interchangeable\" >Pourquoi SDR et PN ne sont pas interchangeables<\/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.desopipe.com\/fr\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/#Selecting_Based_on_Operating_Conditions\" >S\u00e9lection bas\u00e9e sur les conditions de fonctionnement<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.desopipe.com\/fr\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/#Temperature_Derating\" >D\u00e9classement en temp\u00e9rature<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.desopipe.com\/fr\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/#Surge_Pressure_and_Water_Hammer\" >Surpression et coup de b\u00e9lier<\/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.desopipe.com\/fr\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/#Chemical_and_Mechanical_Factors\" >Facteurs chimiques et m\u00e9caniques<\/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.desopipe.com\/fr\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/#Common_Selection_Errors\" >Erreurs de s\u00e9lection courantes<\/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.desopipe.com\/fr\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/#Mismatching_Components_Across_SDR_Classes\" >Composants incompatibles entre les classes SDR<\/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.desopipe.com\/fr\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/#Specifying_by_PN_Without_Checking_Temperature\" >Sp\u00e9cification par PN sans contr\u00f4le de temp\u00e9rature<\/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.desopipe.com\/fr\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/#Applying_Standard_Fusion_Parameters_to_Thick-Walled_Pipe\" >Application des param\u00e8tres de fusion standard \u00e0 un tuyau \u00e0 paroi \u00e9paisse<\/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.desopipe.com\/fr\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/#Ignoring_Thermal_Expansion_in_Hot_Systems\" >N\u00e9gliger la dilatation thermique dans les syst\u00e8mes chauds<\/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.desopipe.com\/fr\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/#DESOs_Manufacturing_Precision_and_Project_Experience\" >Pr\u00e9cision de fabrication et exp\u00e9rience en gestion de projet chez DESO<\/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.desopipe.com\/fr\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/#What_This_Means_for_Specification\" >Ce que cela signifie pour les sp\u00e9cifications<\/a><\/li><\/ul><\/nav><\/div>\n\n<p class=\"wp-block-paragraph\">Le SDR mesure l&#039;\u00e9paisseur de paroi par rapport au diam\u00e8tre du tuyau. Le PN indique la pression nominale \u00e0 20 \u00b0C. Le choix de l&#039;\u00e9paisseur de paroi appropri\u00e9e pour les syst\u00e8mes PPR industriels repose sur l&#039;ad\u00e9quation des sp\u00e9cifications du tuyau aux conditions de fonctionnement, telles que la temp\u00e9rature du fluide et la pression de surpression.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_SDR_and_PN_Are_Not_Interchangeable\"><\/span><strong>Pourquoi SDR et PN ne sont pas interchangeables<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Les ing\u00e9nieurs ont souvent tendance \u00e0 consid\u00e9rer SDR et PN comme synonymes. Or, ce n&#039;est pas le cas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>SDR (Standard Dimension Ratio)<\/strong> Il s&#039;agit de la g\u00e9om\u00e9trie. C&#039;est le rapport entre le diam\u00e8tre ext\u00e9rieur et l&#039;\u00e9paisseur de la paroi (SDR = D\/s). Un SDR plus faible signifie une paroi plus \u00e9paisse par rapport au diam\u00e8tre du tuyau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>PN (Pression nominale)<\/strong> La pression nominale PN20 correspond \u00e0 la performance \u00e0 une temp\u00e9rature sp\u00e9cifique. Elle indique la pression maximale en bars que le tuyau peut supporter \u00e0 20 \u00b0C pour une dur\u00e9e de vie de 50 ans. Un tuyau PPR PN20 est con\u00e7u pour une pression de 20 bars \u00e0 temp\u00e9rature ambiante uniquement.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"532\" height=\"304\" src=\"https:\/\/www.desopipe.com\/wp-content\/uploads\/2026\/02\/Understanding-SDR-vs.-PN.webp\" alt=\"\" class=\"wp-image-4099\" srcset=\"https:\/\/www.desopipe.com\/wp-content\/uploads\/2026\/02\/Understanding-SDR-vs.-PN.webp 532w, https:\/\/www.desopipe.com\/wp-content\/uploads\/2026\/02\/Understanding-SDR-vs.-PN-500x286.webp 500w, https:\/\/www.desopipe.com\/wp-content\/uploads\/2026\/02\/Understanding-SDR-vs.-PN-300x171.webp 300w, https:\/\/www.desopipe.com\/wp-content\/uploads\/2026\/02\/Understanding-SDR-vs.-PN-18x10.webp 18w, https:\/\/www.desopipe.com\/wp-content\/uploads\/2026\/02\/Understanding-SDR-vs.-PN-131x75.webp 131w, https:\/\/www.desopipe.com\/wp-content\/uploads\/2026\/02\/Understanding-SDR-vs.-PN-480x274.webp 480w\" sizes=\"auto, (max-width:767px) 480px, 532px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Un SDR plus faible signifie des parois plus \u00e9paisses et une capacit\u00e9 de pression plus \u00e9lev\u00e9e. Un tuyau avec un SDR de 6 supporte une pression sup\u00e9rieure \u00e0 celle d&#039;un tuyau avec un SDR de 11. Cependant, la pression partielle de vapeur (PN) varie avec la temp\u00e9rature, tandis que le SDR reste constant.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Classe SDR<\/strong><\/td><td><strong>\u00c9valuation PN<\/strong><\/td><td><strong>\u00c9paisseur de paroi<\/strong><\/td><td><strong>Utilisation industrielle primaire<\/strong><\/td><\/tr><tr><td>SDR 11<\/td><td>PN10<\/td><td>Mince<\/td><td>Transport d&#039;eau froide, drainage \u00e0 basse pression<\/td><\/tr><tr><td>SDR 7.4<\/td><td>PN16<\/td><td>Moyen<\/td><td>Air comprim\u00e9, eau ti\u00e8de<\/td><\/tr><tr><td>SDR 6<\/td><td>PN20<\/td><td>\u00c9pais<\/td><td>Eau chaude \u00e0 haute pression, refroidissement industriel<\/td><\/tr><tr><td>SDR 5<\/td><td>PN25<\/td><td>Extra \u00e9pais<\/td><td>Traitement chimique, alimentation des chaudi\u00e8res<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">DESO <a href=\"https:\/\/www.desopipe.com\/fr\/blog\/ppr-pipe\/ppr-pipe-sizes-and-specifications-guide-for-buyer\/\" target=\"_blank\" rel=\"noreferrer noopener\">guide des tailles et des sp\u00e9cifications<\/a> liste les dimensions des tuyaux PPR pour toutes les classes SDR.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Selecting_Based_on_Operating_Conditions\"><\/span><strong>S\u00e9lection bas\u00e9e sur les conditions de fonctionnement<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Les valeurs indiqu\u00e9es dans les catalogues supposent une temp\u00e9rature de 20 \u00b0C et un d\u00e9bit en r\u00e9gime permanent. Les syst\u00e8mes industriels fonctionnent \u00e0 des temp\u00e9ratures plus \u00e9lev\u00e9es et subissent des pics de pression que les sp\u00e9cifications des catalogues ne prennent pas en compte.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Temperature_Derating\"><\/span><strong>D\u00e9classement en temp\u00e9rature<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Le <a href=\"https:\/\/www.desopipe.com\/fr\/blog\/ppr-pipe\/ppr-pipe-flow-rate-reduce-pressure-loss-in-buildings\/\" target=\"_blank\" rel=\"noreferrer noopener\">Pression nominale des tuyaux PPR<\/a> La pression diminue lorsque la temp\u00e9rature augmente. Un tuyau PN20, con\u00e7u pour supporter 20 bars \u00e0 20 \u00b0C, voit sa pression chuter \u00e0 10,8 bars \u00e0 70 \u00b0C. \u00c0 80 \u00b0C, il ne supporte plus que 8 bars.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Temp\u00e9rature<\/strong><\/td><td><strong>Capacit\u00e9 r\u00e9elle PN20<\/strong><\/td><td><strong>Capacit\u00e9 r\u00e9elle PN25<\/strong><\/td><\/tr><tr><td>20\u00b0C<\/td><td>20 bars<\/td><td>25 bars<\/td><\/tr><tr><td>60\u00b0C<\/td><td>12,5 bars<\/td><td>15,6 bars<\/td><\/tr><tr><td>70\u00b0C<\/td><td>10,8 bar<\/td><td>13,5 bars<\/td><\/tr><tr><td>80\u00b0C<\/td><td>8,0 bar<\/td><td>10,0 bar<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Surge_Pressure_and_Water_Hammer\"><\/span><strong>Surpression et coup de b\u00e9lier<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Les pompes industrielles g\u00e9n\u00e8rent des chocs hydrauliques au d\u00e9marrage et \u00e0 la fermeture des vannes. Un syst\u00e8me fonctionnant en r\u00e9gime permanent \u00e0 12 bars peut subir des pics de pression \u00e0 18 bars.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pour les syst\u00e8mes sujets aux coups de b\u00e9lier, ajoutez une marge de s\u00e9curit\u00e9 50% lors du choix du SDR. Un tuyau en plastique haute pression avec un SDR de 6 ou 5 absorbe les pics transitoires qui feraient \u00e9clater des parois plus fines.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Chemical_and_Mechanical_Factors\"><\/span><strong>Facteurs chimiques et m\u00e9caniques<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Les produits chimiques agressifs d\u00e9gradent la surface int\u00e9rieure des tuyaux au fil du temps. Des parois plus \u00e9paisses (SDR plus faible) offrent une meilleure r\u00e9sistance \u00e0 la corrosion, ce qui prolonge leur dur\u00e9e de vie lors du transport de produits chimiques.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les vibrations et les chocs externes favorisent \u00e9galement un SDR plus faible. La rigidit\u00e9 accrue emp\u00eache toute d\u00e9formation susceptible de fissurer un tuyau plus fin.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">DESO <a href=\"https:\/\/www.desopipe.com\/fr\/blog\/ppr-pipe\/select-ppr-pipe-in-different-conditions\/\">guide de s\u00e9lection des applications<\/a> Ce document explique comment la temp\u00e9rature, la pression et le type de fluide affectent les sp\u00e9cifications des tuyaux PPR.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_Selection_Errors\"><\/span><strong>Erreurs de s\u00e9lection courantes<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Mismatching_Components_Across_SDR_Classes\"><\/span><strong>Composants incompatibles entre les classes SDR<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">L&#039;installation de raccords PN10 sur une tuyauterie PN20 cr\u00e9e un goulot d&#039;\u00e9tranglement. La tuyauterie enti\u00e8re est alors dimensionn\u00e9e pour une pression de PN10, car le composant le plus fragile en d\u00e9termine la limite. Les raccords sont les premiers \u00e0 c\u00e9der, souvent en \u00e9clatant sous la pression de service normale.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Specifying_by_PN_Without_Checking_Temperature\"><\/span><strong>Sp\u00e9cification par PN sans contr\u00f4le de temp\u00e9rature<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">L&#039;utilisation d&#039;un tuyau SDR 11 (PN10) pour la production continue d&#039;eau chaude sanitaire semble ad\u00e9quate si la pression de service est inf\u00e9rieure \u00e0 10 bars. Cependant, \u00e0 70 \u00b0C, ce m\u00eame tuyau ne supporte qu&#039;une pression de 5 \u00e0 6 bars, ce qui entra\u00eene une fissuration pr\u00e9matur\u00e9e.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Applying_Standard_Fusion_Parameters_to_Thick-Walled_Pipe\"><\/span><strong>Application des param\u00e8tres de fusion standard \u00e0 un tuyau \u00e0 paroi \u00e9paisse<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Lors du soudage par fusion, l&#039;\u00e9paisseur des parois exige un temps de chauffe plus long. Les techniciens qui appliquent un calage SDR 11 \u00e0 des tuyaux SDR 6 ou SDR 5 cr\u00e9ent des \u201c soudures froides \u201d o\u00f9 le mat\u00e9riau n&#039;a jamais atteint sa profondeur de fusion compl\u00e8te. Ces joints, bien qu&#039;apparemment \u00e9tanches, pr\u00e9sentent des fuites sous pression.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ignoring_Thermal_Expansion_in_Hot_Systems\"><\/span><strong>N\u00e9gliger la dilatation thermique dans les syst\u00e8mes chauds<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Les parois plus fines se dilatent davantage sous l&#039;effet de la chaleur. Dans les circuits chauds, les tuyaux PPR standard serpentent dans les tranch\u00e9es, ce qui engendre des contraintes au niveau des joints et des fissures aux points de raccordement. <a href=\"https:\/\/www.desopipe.com\/fr\/blog\/ppr-pipe\/ppr-fiber-composite-pipe-gf-ppr-hot-water-choice\/\" target=\"_blank\" rel=\"noreferrer noopener\">renforc\u00e9 de fibres<\/a> SDR 7.4 r\u00e9duit l&#039;expansion de 70% et maintient sa position.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"DESOs_Manufacturing_Precision_and_Project_Experience\"><\/span><strong>Pr\u00e9cision de fabrication et exp\u00e9rience en gestion de projet chez DESO<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Depuis plus de vingt ans, DESO fournit des syst\u00e8mes PPR pour des usines chimiques, des r\u00e9seaux de CVC, des boucles de refroidissement industrielles et des alimentations de chaudi\u00e8res haute pression.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les proc\u00e9d\u00e9s de fabrication de moindre qualit\u00e9 cr\u00e9ent des zones d&#039;\u00e9paisseur in\u00e9gale au sein d&#039;un m\u00eame tuyau. Ces zones sont les premi\u00e8res \u00e0 c\u00e9der, car la paroi ne supporte pas la pression nominale \u00e0 son point le plus fin. L&#039;extrusion automatis\u00e9e de DESO, utilisant la r\u00e9sine vierge Borealis RA130E, garantit une \u00e9paisseur de paroi conforme aux tol\u00e9rances de la norme ISO 15874 sur toute la longueur du tuyau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La gamme compl\u00e8te SDR, de SDR 11 \u00e0 SDR 5, est livr\u00e9e par un fournisseur unique avec une qualit\u00e9 constante. <a href=\"https:\/\/www.desopipe.com\/fr\/blog\/manufacturer\/buyers-guide-to-high-quality-ppr-pipe-material\/\" target=\"_blank\" rel=\"noreferrer noopener\">mat\u00e9riau de tuyau ppr<\/a> Les propri\u00e9t\u00e9s varient d&#039;un lot \u00e0 l&#039;autre. L&#039;\u00e9quipe d&#039;ing\u00e9nierie de DESO examine les sp\u00e9cifications du projet et recommande la classe SDR en fonction de la temp\u00e9rature de fonctionnement, de la pression et du type de fluide.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_This_Means_for_Specification\"><\/span><strong>Ce que cela signifie pour les sp\u00e9cifications<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Le SDR correspond \u00e0 la g\u00e9om\u00e9trie. Le PN repr\u00e9sente la pression admissible \u00e0 20 \u00b0C. La temp\u00e9rature r\u00e9duit ces deux valeurs. Pour le choix des tuyauteries PPR industrielles, il est essentiel d&#039;adapter la classe SDR \u00e0 la temp\u00e9rature de service, aux surtensions pr\u00e9vues et \u00e0 l&#039;exposition aux produits chimiques. Le composant le plus fragile du syst\u00e8me limite la pression admissible de tous les \u00e9l\u00e9ments qui y sont raccord\u00e9s.<\/p>\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-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/www.desopipe.com\/fr\/contact\/\" style=\"background-color:#0588a7\" target=\"_blank\" rel=\"noreferrer noopener\">Obtenez un devis gratuit<\/a><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>SDR measures wall thickness relative to pipe diameter. PN tells you the pressure rating at 20\u00b0C. Choosing the right plumbing wall thickness for industrial PPR systems<span class=\"excerpt-hellip\"> [\u2026]<\/span><\/p>\n","protected":false},"author":1,"featured_media":4100,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[56],"tags":[],"class_list":["post-4097","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ppr-pipe"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>PPR Pipe: Choosing the Right Wall Thickness (SDR vs PN) | DESO Group<\/title>\n<meta name=\"description\" content=\"Learn the difference between SDR and PN ratings for PPR pipes. 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