{"id":14682,"date":"2026-01-21T09:00:00","date_gmt":"2026-01-21T01:00:00","guid":{"rendered":"https:\/\/www.xintaivalves.com\/?p=14682"},"modified":"2026-02-04T09:35:43","modified_gmt":"2026-02-04T01:35:43","slug":"fugitive-emissions-iso-15848-testing","status":"publish","type":"post","link":"https:\/\/www.xintaivalves.com\/fr\/blog\/technical-science\/fugitive-emissions-iso-15848-testing\/","title":{"rendered":"\u00c9missions fugitives\u00a0: principes de base\u00a0: essais et conception des garnitures de tige selon la norme ISO 15848-1"},"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\/fugitive-emissions-iso-15848-testing\/#What_do_%E2%80%9Cfugitive_emissions%E2%80%9D_mean_in_valve_procurement\" >Que signifie l\u2019expression \u201c\u00a0\u00e9missions fugitives\u00a0\u201d dans le cadre de l\u2019approvisionnement en vannes\u00a0?<\/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\/fugitive-emissions-iso-15848-testing\/#The_leak_path_ISO_testing_is_focused_on\" >Les tests ISO de fuite sont ax\u00e9s sur<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.xintaivalves.com\/fr\/blog\/technical-science\/fugitive-emissions-iso-15848-testing\/#Why_material_and_surface_conditions_still_matter\" >Pourquoi les conditions de mat\u00e9riau et de surface restent importantes<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.xintaivalves.com\/fr\/blog\/technical-science\/fugitive-emissions-iso-15848-testing\/#ISO_15848-1_what_the_test_is_trying_to_simulate\" >ISO 15848-1\u00a0: ce que le test cherche \u00e0 simuler<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.xintaivalves.com\/fr\/blog\/technical-science\/fugitive-emissions-iso-15848-testing\/#Test_concept_in_plain_terms\" >Concept du test (en termes simples)<\/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\/fugitive-emissions-iso-15848-testing\/#Thermal_cycling_where_packing_systems_fail_first\" >Cycles thermiques\u00a0: l\u00e0 o\u00f9 les syst\u00e8mes d\u2019emballage c\u00e8dent en premier<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.xintaivalves.com\/fr\/blog\/technical-science\/fugitive-emissions-iso-15848-testing\/#The_stem_packing_stack_V-packing_disc_springs_explained\" >Le garnissage de tige\u00a0: explications sur le garnissage en V et les ressorts \u00e0 disque<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.xintaivalves.com\/fr\/blog\/technical-science\/fugitive-emissions-iso-15848-testing\/#V-packing_Chevron_rings_why_theyre_used\" >Joints en V (chevron)\u00a0: pourquoi sont-ils utilis\u00e9s\u00a0?<\/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.xintaivalves.com\/fr\/blog\/technical-science\/fugitive-emissions-iso-15848-testing\/#Disc_springs_the_%E2%80%9Cload_stabilizer%E2%80%9D\" >Ressorts \u00e0 disque\u00a0: le \u201c\u00a0stabilisateur de charge\u00a0\u201d<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.xintaivalves.com\/fr\/blog\/technical-science\/fugitive-emissions-iso-15848-testing\/#Compliance-minded_selection_notes_what_to_write_into_the_PO\" >Notes de s\u00e9lection ax\u00e9es sur la conformit\u00e9 (que faut-il inscrire dans le bon de commande ?)<\/a><\/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\/fugitive-emissions-iso-15848-testing\/#Where_this_matters_most_common_service_examples\" >L\u00e0 o\u00f9 cela compte le plus\u00a0: exemples de service courants<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.xintaivalves.com\/fr\/blog\/technical-science\/fugitive-emissions-iso-15848-testing\/#High_thermal_swing_or_repeated_cycling\" >Variations thermiques importantes ou cycles r\u00e9p\u00e9t\u00e9s<\/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.xintaivalves.com\/fr\/blog\/technical-science\/fugitive-emissions-iso-15848-testing\/#Isolation_procedures_with_high_consequences\" >Proc\u00e9dures d&#039;isolement aux cons\u00e9quences importantes<\/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.xintaivalves.com\/fr\/blog\/technical-science\/fugitive-emissions-iso-15848-testing\/#Conclusion\" >Conclusion<\/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.xintaivalves.com\/fr\/blog\/technical-science\/fugitive-emissions-iso-15848-testing\/#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-16\" href=\"https:\/\/www.xintaivalves.com\/fr\/blog\/technical-science\/fugitive-emissions-iso-15848-testing\/#FAQs_People_Also_Ask_style\" >FAQ (style \u00ab\u00a0Autres questions pos\u00e9es\u00a0\u00bb)<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.xintaivalves.com\/fr\/blog\/technical-science\/fugitive-emissions-iso-15848-testing\/#What_is_ISO_15848-1_used_for\" >\u00c0 quoi sert la norme ISO 15848-1 ?<\/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\/fugitive-emissions-iso-15848-testing\/#Does_fugitive_emissions_testing_measure_seat_leakage\" >Les tests d&#039;\u00e9missions fugitives permettent-ils de mesurer les fuites au niveau des si\u00e8ges\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.xintaivalves.com\/fr\/blog\/technical-science\/fugitive-emissions-iso-15848-testing\/#Why_is_thermal_cycling_important_in_emissions_performance\" >Pourquoi les cycles thermiques sont-ils importants pour les performances en mati\u00e8re d&#039;\u00e9missions ?<\/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.xintaivalves.com\/fr\/blog\/technical-science\/fugitive-emissions-iso-15848-testing\/#What_is_live_loading_in_valve_packing\" >Qu&#039;est-ce que la charge utile dans les garnitures de vannes\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.xintaivalves.com\/fr\/blog\/technical-science\/fugitive-emissions-iso-15848-testing\/#How_can_I_reduce_the_need_for_packing_retightening\" >Comment puis-je r\u00e9duire la n\u00e9cessit\u00e9 de resserrer les joints d&#039;\u00e9tanch\u00e9it\u00e9\u00a0?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n\n<p class=\"wp-block-paragraph\">Les objectifs de r\u00e9duction des \u00e9missions fugitives sont faciles \u00e0 int\u00e9grer dans un cahier des charges, mais beaucoup plus difficiles \u00e0 maintenir stables en conditions r\u00e9elles d&#039;utilisation. La plupart des fuites au niveau d&#039;une vanne sont dues \u00e0 des infiltrations. <strong>pas<\/strong> \u00e0 travers le si\u00e8ge. C&#039;est g\u00e9n\u00e9ralement \u00e0 travers le <strong>syst\u00e8me d&#039;\u00e9tanch\u00e9it\u00e9 de la tige<\/strong> Apr\u00e8s des cycles thermiques, des vibrations et des op\u00e9rations r\u00e9p\u00e9t\u00e9es, la norme ISO 15848-1 a pour but de transformer ce risque en une m\u00e9thode d&#039;essai mesurable et reproductible.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ce guide explique les crit\u00e8res de v\u00e9rification de la norme ISO 15848-1, l&#039;impact des cycles thermiques sur l&#039;\u00e9tanch\u00e9it\u00e9 de la tige et les d\u00e9tails de conception importants pour le choix d&#039;une vanne conforme aux exigences \u00e0 long terme. Si vous \u00eates encore en train de choisir une vanne adapt\u00e9e \u00e0 votre classe de ligne, consultez le guide de Xintai.<a href=\"https:\/\/www.xintaivalves.com\/fr\/product\/ball-valve\/\" target=\"_blank\" rel=\"noreferrer noopener\"> page de pr\u00e9sentation des produits de vannes \u00e0 bille<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_do_%E2%80%9Cfugitive_emissions%E2%80%9D_mean_in_valve_procurement\"><\/span><strong>Que signifie l\u2019expression \u201c\u00a0\u00e9missions fugitives\u00a0\u201d dans le cadre de l\u2019approvisionnement en vannes\u00a0?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_leak_path_ISO_testing_is_focused_on\"><\/span><strong>Les tests ISO de fuite sont ax\u00e9s sur<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Pour la plupart des vannes quart de tour, le chemin de fuite le plus probable est\u00a0:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>surface de la tige \u2192 anneaux de garnissage \u2192 suiveur de glande \u2192 atmosph\u00e8re<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les fuites au niveau des si\u00e8ges de si\u00e8ge, c&#039;est un autre sujet. Les \u00e9missions fugitives concernent environ\u2026 <strong>fuites externes vers l&#039;atmosph\u00e8re<\/strong>, le plus souvent de la zone d&#039;emballage de la tige.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_material_and_surface_conditions_still_matter\"><\/span><strong>Pourquoi les conditions de mat\u00e9riau et de surface restent importantes<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">La finition de la tige, sa concentricit\u00e9 et sa r\u00e9sistance \u00e0 la corrosion influencent la fa\u00e7on dont le garnissage se met en place et la vitesse \u00e0 laquelle il s&#039;use. C&#039;est l&#039;une des raisons pour lesquelles les \u00e9quipes d&#039;approvisionnement pr\u00e9s\u00e9lectionnent souvent un <a href=\"https:\/\/www.xintaivalves.com\/fr\/custom-stainless-steel-ball-valves\/\">acier inoxydable<\/a><a href=\"https:\/\/www.xintaivalves.com\/fr\/custom-stainless-steel-ball-valves\/\" target=\"_blank\" rel=\"noreferrer noopener\">s<\/a><a href=\"https:\/\/www.xintaivalves.com\/fr\/custom-stainless-steel-ball-valves\/\"> vanne \u00e0 bille en acier<\/a> Pour les applications soumises \u00e0 des \u00e9missions contr\u00f4l\u00e9es\u00a0: un \u00e9tat constant de la tige contribue \u00e0 maintenir une charge d\u2019\u00e9tanch\u00e9it\u00e9 stable dans le temps.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"ISO_15848-1_what_the_test_is_trying_to_simulate\"><\/span><strong>ISO 15848-1\u00a0: ce que le test cherche \u00e0 simuler<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Test_concept_in_plain_terms\"><\/span><strong>Concept du test (en termes simples)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">La norme ISO 15848-1 \u00e9value la quantit\u00e9 de fuites provenant du joint de tige lorsque la vanne est expos\u00e9e \u00e0\u00a0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>cycle m\u00e9canique (op\u00e9rations d&#039;ouverture\/fermeture)<\/li>\n\n\n\n<li>cyclage thermique (variations de temp\u00e9rature)<\/li>\n\n\n\n<li>milieux de test et m\u00e9thodes de mesure d\u00e9finis<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">L&#039;essentiel n&#039;est pas le nombre de cycles en soi, mais plut\u00f4t la capacit\u00e9 du syst\u00e8me d&#039;emballage \u00e0\u2026 <strong>maintenir la contrainte d&#039;\u00e9tanch\u00e9it\u00e9 stable<\/strong> tandis que tout se dilate et se contracte sans cesse.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Thermal_cycling_where_packing_systems_fail_first\"><\/span><strong>Cycles thermiques\u00a0: l\u00e0 o\u00f9 les syst\u00e8mes d\u2019emballage c\u00e8dent en premier<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Les cycles thermiques provoquent\u00a0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>croissance\/r\u00e9tr\u00e9cissement de la tige<\/li>\n\n\n\n<li>d\u00e9tente en mati\u00e8re de bagages<\/li>\n\n\n\n<li>fluage du joint\/garniture<\/li>\n\n\n\n<li>redistribution de la charge du boulon au niveau du presse-\u00e9toupe<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Si la conception repose uniquement sur un couple de serrage unique, elle peut r\u00e9ussir les contr\u00f4les initiaux mais d\u00e9river apr\u00e8s les cycles thermiques.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_stem_packing_stack_V-packing_disc_springs_explained\"><\/span><strong>Le garnissage de tige\u00a0: explications sur le garnissage en V et les ressorts \u00e0 disque<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"V-packing_Chevron_rings_why_theyre_used\"><\/span><strong>Joints en V (chevron)\u00a0: pourquoi sont-ils utilis\u00e9s\u00a0?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Les joints toriques en V assurent l&#039;\u00e9tanch\u00e9it\u00e9 en convertissant la charge axiale du presse-\u00e9toupe en contrainte d&#039;\u00e9tanch\u00e9it\u00e9 radiale sur la tige. Concr\u00e8tement, ils absorbent les faibles mouvements de la tige et maintiennent la pression de contact. <strong>si la charge est maintenue stable<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c9l\u00e9ments \u00e0 rechercher sur une fiche technique ou un dessin\u00a0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>mat\u00e9riau de l&#039;anneau et plage de temp\u00e9rature<\/li>\n\n\n\n<li>nombre d&#039;anneaux et orientation<\/li>\n\n\n\n<li>bagues anti-extrusion\/d&#039;adaptation le cas \u00e9ch\u00e9ant<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Disc_springs_the_%E2%80%9Cload_stabilizer%E2%80%9D\"><\/span><strong>Ressorts \u00e0 disque\u00a0: le \u201c\u00a0stabilisateur de charge\u00a0\u201d<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Les rondelles Belleville permettent de maintenir la pression sur le presse-\u00e9toupe lorsque la garniture se d\u00e9tend. On peut les consid\u00e9rer comme un amortisseur m\u00e9canique qui maintient la pression sur la garniture m\u00eame apr\u00e8s son tassement.\u201c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Avantages d&#039;une taxe contr\u00f4l\u00e9e sur les \u00e9missions\u00a0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>compense la d\u00e9formation r\u00e9manente due \u00e0 la compression du garnissage<\/li>\n\n\n\n<li>r\u00e9duit la fr\u00e9quence \u00e0 laquelle un resserrage est n\u00e9cessaire<\/li>\n\n\n\n<li>permet \u00e0 la vanne de rester dans les limites de fuite lors des cycles thermiques<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00e9rification rapide lors de l&#039;examen\u00a0: demandez si des ressorts \u00e0 disque sont inclus dans la conception du presse-\u00e9toupe et si l&#039;empilement de ressorts est sp\u00e9cifi\u00e9 pour la plage de temp\u00e9rature.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Compliance-minded_selection_notes_what_to_write_into_the_PO\"><\/span><strong>Notes de s\u00e9lection ax\u00e9es sur la conformit\u00e9 (que faut-il inscrire dans le bon de commande ?)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Utilisez ces lignes pour \u00e9viter les probl\u00e8mes li\u00e9s aux \u201c\u00a0nous avons suppos\u00e9\u00a0\u201d\u00a0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Classe\/niveau de test ISO 15848-1 requis pour le projet<\/li>\n\n\n\n<li>Plage de temp\u00e9ratures et profil de cycle pertinents pour votre service<\/li>\n\n\n\n<li>exigences relatives aux mat\u00e9riaux d&#039;emballage (et \u00e0 tout mat\u00e9riau interdit)<\/li>\n\n\n\n<li>Exigences de conception du presse-\u00e9toupe (ressorts \u00e0 disque ou charge utile \u00e9quivalente)<\/li>\n\n\n\n<li>documentation d&#039;acceptation (rapport de test, tra\u00e7abilit\u00e9, configuration d&#039;emballage)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Si votre projet vise \u00e0 aligner les sp\u00e9cifications d&#039;isolation sur des exigences plus g\u00e9n\u00e9rales relatives aux vannes, vous pouvez \u00e9galement faire r\u00e9f\u00e9rence \u00e0 un <a href=\"https:\/\/www.xintaivalves.com\/fr\/blog\/understanding-the-differences-in-valve-standards%EF%BC%9Aapi-608-vs-api-6d\/\" target=\"_blank\" rel=\"noreferrer noopener\">vanne \u00e0 bille API 608<\/a> dans le cadre du processus d&#039;approvisionnement, afin d&#039;uniformiser la conception et les options de s\u00e9curit\u00e9 incendie chez tous les fournisseurs.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Where_this_matters_most_common_service_examples\"><\/span><strong>L\u00e0 o\u00f9 cela compte le plus\u00a0: exemples de service courants<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"High_thermal_swing_or_repeated_cycling\"><\/span><strong>Variations thermiques importantes ou cycles r\u00e9p\u00e9t\u00e9s<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Exemples\u00a0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>collecteurs utilitaires de vapeur et de condensat<\/li>\n\n\n\n<li>Circuits d&#039;huile chaude avec d\u00e9marrages\/arr\u00eats fr\u00e9quents<\/li>\n\n\n\n<li>conduites de refoulement du compresseur avec vibrations<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Isolation_procedures_with_high_consequences\"><\/span><strong>Proc\u00e9dures d&#039;isolement aux cons\u00e9quences importantes<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Sur les syst\u00e8mes o\u00f9 l&#039;isolement est li\u00e9 aux autorisations et aux mesures de s\u00e9curit\u00e9, un <a href=\"https:\/\/www.xintaivalves.com\/fr\/product\/double-block-and-bleed-valve-ball-valve\/\" target=\"_blank\" rel=\"noreferrer noopener\">double vanne d&#039;arr\u00eat et de purge<\/a> Des sp\u00e9cifications peuvent \u00eatre pr\u00e9vues pour r\u00e9duire l&#039;exposition lors de la maintenance. Le contr\u00f4le des \u00e9missions fugitives repose toujours sur les m\u00eames principes d&#039;\u00e9tanch\u00e9it\u00e9 de la tige\u00a0; la conception du garnissage ne peut donc \u00eatre consid\u00e9r\u00e9e comme secondaire.<\/p>\n\n\n\n<!DOCTYPE html>\n<html lang=\"en\">\n<head>\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\/products\/api-623-globe-valve\/\" target=\"_blank\">\n  <img decoding=\"async\" class=\"hero-image\" src=\"https:\/\/dbfhaf64fpo53.cloudfront.net\/wp-content\/uploads\/2022\/02\/WCB-J41H-150LB-3inch.jpg\" alt=\"Robinet \u00e0 soupape en acier moul\u00e9 API 623\">\n  <div class=\"hero-content\">\n    <div class=\"hero-title\">\u2699\ufe0f Vanne \u00e0 bille en acier forg\u00e9 \u00e0 bride API 3PC<\/div>\n    <div class=\"hero-description\">Un composant essentiel utilis\u00e9 pour r\u00e9guler le d\u00e9bit des fluides dans diverses applications industrielles.<\/div>\n    <span class=\"hero-link\">Explorer 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\">La norme ISO 15848-1 est pr\u00e9cieuse car elle impose une m\u00e9thode d&#039;essai reproductible pour \u00e9valuer l&#039;\u00e9tanch\u00e9it\u00e9 de la tige. En fonctionnement quotidien, les cycles thermiques constituent la contrainte qui met \u00e0 nu les garnitures d&#039;\u00e9tanch\u00e9it\u00e9 fragiles. Les garnitures en V assurent une bonne \u00e9tanch\u00e9it\u00e9 lorsque la charge du presse-\u00e9toupe est stable, et les ressorts \u00e0 disque contribuent \u00e0 maintenir cette stabilit\u00e9 malgr\u00e9 la d\u00e9tente de la garniture.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Si la conformit\u00e9 aux normes d&#039;\u00e9missions est en jeu, consid\u00e9rez la conception du garnissage comme un crit\u00e8re de s\u00e9lection primordial, et non comme un d\u00e9tail. Une vanne \u00e0 bille en acier inoxydable correctement sp\u00e9cifi\u00e9e, dot\u00e9e d&#039;un syst\u00e8me d&#039;\u00e9tanch\u00e9it\u00e9 de tige fiable, r\u00e9duit les resserrages, limite la d\u00e9rive et am\u00e9liore la pr\u00e9visibilit\u00e9 des r\u00e9sultats en mati\u00e8re de conformit\u00e9.<\/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 norme ISO 15848-1 cible le comportement des fuites de la tige sous contrainte m\u00e9canique et thermique, et non pas seulement dans des conditions de \u201c nouvelle installation \u201d.<\/li>\n\n\n\n<li>Les performances des garnitures en V d\u00e9pendent du maintien de la charge du presse-\u00e9toupe ; les ressorts \u00e0 disque contribuent \u00e0 stabiliser cette charge gr\u00e2ce aux cycles de relaxation et de chaleur.<\/li>\n\n\n\n<li>Int\u00e9grez les exigences de configuration d&#039;emballage et de documentation dans le bon de commande afin d&#039;\u00e9viter les substitutions non document\u00e9es.<\/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_People_Also_Ask_style\"><\/span><strong>FAQ (style \u00ab\u00a0Autres questions pos\u00e9es\u00a0\u00bb)<\/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_ISO_15848-1_used_for\"><\/span><strong>\u00c0 quoi sert la norme ISO 15848-1 ?<\/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 norme d&#039;essai utilis\u00e9e pour classer les performances des \u00e9missions fugitives des soupapes, principalement au niveau du joint de tige, sous des cycles et des temp\u00e9ratures d\u00e9finis.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Does_fugitive_emissions_testing_measure_seat_leakage\"><\/span><strong>Les tests d&#039;\u00e9missions fugitives permettent-ils de mesurer les fuites au niveau des si\u00e8ges\u00a0?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Non. Elle se concentre sur les fuites externes vers l&#039;atmosph\u00e8re, le plus souvent au niveau du joint d&#039;\u00e9tanch\u00e9it\u00e9 de la tige.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_is_thermal_cycling_important_in_emissions_performance\"><\/span><strong>Pourquoi les cycles thermiques sont-ils importants pour les performances en mati\u00e8re d&#039;\u00e9missions ?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">La dilatation, la contraction et le rel\u00e2chement du garnissage r\u00e9duisent la charge du presse-\u00e9toupe au fil du temps, ce qui peut augmenter les fuites si la conception n&#039;est pas adapt\u00e9e aux charges dynamiques.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_live_loading_in_valve_packing\"><\/span><strong>Qu&#039;est-ce que la charge utile dans les garnitures de vannes\u00a0?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Utiliser des ressorts \u00e0 disque (rondelles Belleville) ou des m\u00e9canismes similaires pour maintenir une compression constante sur le garnissage lorsqu&#039;il se tasse ou se d\u00e9place.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_can_I_reduce_the_need_for_packing_retightening\"><\/span><strong>Comment puis-je r\u00e9duire la n\u00e9cessit\u00e9 de resserrer les joints d&#039;\u00e9tanch\u00e9it\u00e9\u00a0?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Sp\u00e9cifiez un garnissage stable (tel qu&#039;un garnissage en V) avec chargement dynamique, v\u00e9rifiez les exigences de finition de la tige et demandez la configuration exacte du garnissage dans la documentation.<\/p>","protected":false},"excerpt":{"rendered":"<p>Fugitive emissions targets are easy to add to a spec, and much harder to keep stable in real operation. Most leakage at a valve is not through the seat. It\u2019s usually through the stem sealing system after thermal cycling, vibration, and repeated operation. ISO 15848-1 exists to turn that risk into a measurable, repeatable test [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":14683,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[306],"tags":[],"class_list":["post-14682","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\/14682","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=14682"}],"version-history":[{"count":2,"href":"https:\/\/www.xintaivalves.com\/fr\/wp-json\/wp\/v2\/posts\/14682\/revisions"}],"predecessor-version":[{"id":14729,"href":"https:\/\/www.xintaivalves.com\/fr\/wp-json\/wp\/v2\/posts\/14682\/revisions\/14729"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.xintaivalves.com\/fr\/wp-json\/wp\/v2\/media\/14683"}],"wp:attachment":[{"href":"https:\/\/www.xintaivalves.com\/fr\/wp-json\/wp\/v2\/media?parent=14682"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xintaivalves.com\/fr\/wp-json\/wp\/v2\/categories?post=14682"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xintaivalves.com\/fr\/wp-json\/wp\/v2\/tags?post=14682"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}