{"id":7072,"date":"2026-07-28T14:45:25","date_gmt":"2026-07-28T20:45:25","guid":{"rendered":"https:\/\/www.hitechseals.com\/guide-de-conception-des-joints-toriques\/defaillance-courante-des-joints-toriques\/"},"modified":"2026-07-31T12:53:10","modified_gmt":"2026-07-31T18:53:10","slug":"defaillance-courante-des-joints-toriques","status":"publish","type":"page","link":"https:\/\/www.hitechseals.com\/fr\/guide-de-conception-des-joints-toriques\/defaillance-courante-des-joints-toriques\/","title":{"rendered":"D\u00e9faillance courante des joints toriques"},"content":{"rendered":"
[vc_row sm=\u00a0\u00bb0″ smb=\u00a0\u00bb0″ md=\u00a0\u00bb0″ mdb=\u00a0\u00bb0″ lg=\u00a0\u00bb0″ css=\u00a0\u00bb.vc_custom_1785339833779{margin-top: 30px !important;margin-bottom: 30px !important;}\u00a0\u00bb][vc_column width=\u00a0\u00bb1\/3″ css=\u00a0\u00bb.vc_custom_1785358269113{padding-left: 50px !important;}\u00a0\u00bb][web3_vc_content sm=\u00a0\u00bb20″ md=\u00a0\u00bb30″ lg=\u00a0\u00bb50″]\r\n

Contenu<\/span><\/h2>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Extrusion ou grignotage<\/a><\/span><\/td>\r\n<\/tr>\r\n
Surcompression<\/a><\/span><\/td>\r\n<\/tr>\r\n
Abrasion<\/a><\/span><\/td>\r\n<\/tr>\r\n
D\u00e9formation r\u00e9manente apr\u00e8s compression<\/a><\/span><\/td>\r\n<\/tr>\r\n
D\u00e9gazage ou extraction<\/a><\/span><\/td>\r\n<\/tr>\r\n
Dommage \u00e0 l\u2019installation<\/a><\/span><\/td>\r\n<\/tr>\r\n
D\u00e9gradation chimique<\/a><\/span><\/td>\r\n<\/tr>\r\n
D\u00e9gradation thermique<\/a><\/span><\/td>\r\n<\/tr>\r\n
D\u00e9faillance en spirale<\/a><\/span><\/td>\r\n<\/tr>\r\n
D\u00e9gradation par plasma<\/a><\/span><\/td>\r\n<\/tr>\r\n
Contamination<\/a><\/span><\/td>\r\n<\/tr>\r\n
D\u00e9compression rapide des gaz<\/a><\/span><\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n[\/web3_vc_content][\/vc_column][\/vc_row][vc_row css=\u00a0\u00bb.vc_custom_1785339271034{margin-top: 0px !important;margin-bottom: 100px !important;}\u00a0\u00bb][vc_column width=\u00a0\u00bb1\/3″ css=\u00a0\u00bb.vc_custom_1785357534153{padding-left: 50px !important;}\u00a0\u00bb][vc_column_text css=\u00a0\u00bb\u00a0\u00bb el_id=\u00a0\u00bbextrusion-or-nibbling\u00a0\u00bb]\r\n

Extrusion ou grignotage<\/span><\/h2>\r\n[\/vc_column_text][vc_single_image image=\u00a0\u00bb7074″ img_size=\u00a0\u00bbmedium\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb css=\u00a0\u00bb.vc_custom_1785357578022{margin-top: 40px !important;}\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb1\/2″][vc_column_text css=\u00a0\u00bb.vc_custom_1785340300383{margin-top: 60px !important;}\u00a0\u00bb]Lorsque l\u2019extrusion ou le grignotage se produit, le joint d\u00e9veloppe des bords irr\u00e9guliers, ce qui peut lui donner un aspect d\u00e9chir\u00e9. Cela appara\u00eet g\u00e9n\u00e9ralement du c\u00f4t\u00e9 basse pression. En g\u00e9n\u00e9ral, les d\u00e9faillances par extrusion sont caus\u00e9es par un ou plusieurs des facteurs suivants : \r\n\r\n\r\n\r\n\r\n\r\n\r\n
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    \r\n \t
  • D\u00e9gagements excessifs<\/li>\r\n<\/ul>\r\n<\/td>\r\n
\r\n
    \r\n \t
  • Espaces de d\u00e9gagement irr\u00e9guliers<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
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    \r\n \t
  • Pression excessive<\/li>\r\n<\/ul>\r\n<\/td>\r\n
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    \r\n \t
  • Bords de gorge tranchants<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
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    \r\n \t
  • \u00c9lastom\u00e8re \u00e0 faible module ou duret\u00e9<\/li>\r\n<\/ul>\r\n<\/td>\r\n
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    \r\n \t
  • Dimensionnement incorrect<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
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    \r\n \t
  • Remplissage excessif de la gorge<\/li>\r\n<\/ul>\r\n<\/td>\r\n
<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n \r\n\r\nLes solutions pour pr\u00e9venir l\u2019extrusion incluent :\r\n\r\n\r\n\r\n\r\n\r\n\r\n
\r\n
    \r\n \t
  • Diminution du jeu<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
\r\n
    \r\n \t
  • Utiliser un \u00e9lastom\u00e8re \u00e0 module plus \u00e9lev\u00e9 ou plus dur<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
\r\n
    \r\n \t
  • Conception appropri\u00e9e de la gorge<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
\r\n
    \r\n \t
  • Utilisation de bagues d\u2019appui en polym\u00e8re<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row css=\u00a0\u00bb.vc_custom_1785255608778{margin-top: 70px !important;margin-bottom: 100px !important;}\u00a0\u00bb][vc_column width=\u00a0\u00bb1\/3″ css=\u00a0\u00bb.vc_custom_1785356480967{margin-left: 0px !important;padding-left: 50px !important;}\u00a0\u00bb][vc_column_text css=\u00a0\u00bb\u00a0\u00bb el_id=\u00a0\u00bbover-compression\u00a0\u00bb]\r\n

    Surcompression<\/span><\/h2>\r\n[\/vc_column_text][vc_single_image image=\u00a0\u00bb7075″ img_size=\u00a0\u00bbmedium\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb css=\u00a0\u00bb.vc_custom_1785358240794{margin-top: 40px !important;}\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb1\/2″][vc_column_text css=\u00a0\u00bb.vc_custom_1785341489559{margin-top: 60px !important;}\u00a0\u00bb]La surcompression provoque l\u2019aplatissement des surfaces de contact. Elle peut \u00e9galement entra\u00eener des fissures circonf\u00e9rentielles sur les surfaces aplaties du joint. En g\u00e9n\u00e9ral, les d\u00e9faillances par surcompression sont caus\u00e9es par un ou plusieurs des facteurs suivants : \r\n\r\n\r\n\r\n\r\n\r\n
    \r\n
      \r\n \t
    • Conception incorrecte (non-prise en compte de la dilatation thermique)<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
    \r\n
      \r\n \t
    • Changements de volume chimique<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
    \r\n
      \r\n \t
    • Compression excessive<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n \r\n\r\nUne solution pour pr\u00e9venir la surcompression consiste \u00e0 prendre en compte la r\u00e9ponse du mat\u00e9riau aux environnements chimiques et thermiques pendant le processus de conception de la gorge.[\/vc_column_text][\/vc_column][\/vc_row][vc_row css=\u00a0\u00bb.vc_custom_1785255608778{margin-top: 70px !important;margin-bottom: 100px !important;}\u00a0\u00bb][vc_column width=\u00a0\u00bb1\/3″ css=\u00a0\u00bb.vc_custom_1785358290992{padding-left: 50px !important;}\u00a0\u00bb][vc_column_text css=\u00a0\u00bb\u00a0\u00bb el_id=\u00a0\u00bbabrasion\u00a0\u00bb]\r\n

      Abrasion<\/span><\/h2>\r\n[\/vc_column_text][vc_single_image image=\u00a0\u00bb7076″ img_size=\u00a0\u00bbmedium\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb css=\u00a0\u00bb.vc_custom_1785358625417{margin-top: 40px !important;}\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb1\/2″ css=\u00a0\u00bb.vc_custom_1785358873757{margin-left: 0px !important;border-left-width: 0px !important;padding-left: 0px !important;}\u00a0\u00bb][vc_column_text css=\u00a0\u00bb.vc_custom_1785358967540{margin-top: 60px !important;margin-right: 0px !important;margin-left: 0px !important;}\u00a0\u00bb]L\u2019abrasion se produit g\u00e9n\u00e9ralement dans les joints dynamiques, soumis \u00e0 un mouvement alternatif, oscillant ou rotatif. Cette d\u00e9faillance provoque des lac\u00e9rations et des ruptures sur la surface du joint torique qui subit une usure excessive. L\u2019abrasion est caus\u00e9e par un ou plusieurs des facteurs suivants : \r\n\r\n\r\n\r\n\r\n\r\n
      \r\n
        \r\n \t
      • Surfaces d\u2019\u00e9tanch\u00e9it\u00e9 rugueuses<\/li>\r\n<\/ul>\r\n<\/td>\r\n
      		\r\n
        \r\n \t
      • Mouvement dynamique<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
      \r\n
        \r\n \t
      • Temp\u00e9rature excessive<\/li>\r\n<\/ul>\r\n<\/td>\r\n
      		\r\n
        \r\n \t
      • Mauvais \u00e9tat de surface de l\u2019\u00e9lastom\u00e8re<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
      \r\n
        \r\n \t
      • Environnement de processus contenant des particules abrasives<\/li>\r\n<\/ul>\r\n<\/td>\r\n
      		<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n \r\n\r\nLes solutions pour pr\u00e9venir l\u2019extrusion incluent :\r\n\r\n\r\n\r\n\r\n\r\n
      \r\n
        \r\n \t
      • Utiliser les \u00e9tats de surface de gorge recommand\u00e9s<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
      \r\n
        \r\n \t
      • Consid\u00e9rer les \u00e9lastom\u00e8res lubrifi\u00e9s en interne<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
      \r\n
        \r\n \t
      • \u00c9liminer les composants abrasifs<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row css=\u00a0\u00bb.vc_custom_1785255608778{margin-top: 70px !important;margin-bottom: 100px !important;}\u00a0\u00bb][vc_column width=\u00a0\u00bb1\/3″ css=\u00a0\u00bb.vc_custom_1785359466446{padding-left: 50px !important;}\u00a0\u00bb][vc_column_text css=\u00a0\u00bb\u00a0\u00bb el_id=\u00a0\u00bbcompression-set\u00a0\u00bb]\r\n

        D\u00e9formation r\u00e9manente apr\u00e8s compression<\/span><\/h2>\r\n[\/vc_column_text][vc_single_image image=\u00a0\u00bb7077″ img_size=\u00a0\u00bbmedium\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb css=\u00a0\u00bb.vc_custom_1785359605584{margin-top: 40px !important;}\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb1\/2″][vc_column_text css=\u00a0\u00bb.vc_custom_1785359507078{margin-top: 60px !important;}\u00a0\u00bb]La d\u00e9formation permanente (compression set) fait perdre au joint torique sa section circulaire ou en forme de O pour ressembler \u00e0 un ovale \u00e0 c\u00f4t\u00e9s plats. Le c\u00f4t\u00e9 plat correspond aux surfaces d\u2019\u00e9tanch\u00e9it\u00e9 de contact.\r\nLes facteurs contributifs peuvent inclure un ou plusieurs des \u00e9l\u00e9ments suivants : \r\n\r\n\r\n\r\n\r\n\r\n
        \r\n
          \r\n \t
        • Compression excessive<\/li>\r\n<\/ul>\r\n<\/td>\r\n
        		\r\n
          \r\n \t
        • \u00c9lastom\u00e8re avec une d\u00e9formation permanente \u00e9lev\u00e9e<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
        \r\n
          \r\n \t
        • Temp\u00e9rature excessive<\/li>\r\n<\/ul>\r\n<\/td>\r\n
        		\r\n
          \r\n \t
        • Gonflement volumique excessif en milieu chimique<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
        \r\n
          \r\n \t
        • \u00c9lastom\u00e8re incompl\u00e8tement vulcanis\u00e9<\/li>\r\n<\/ul>\r\n<\/td>\r\n
        		<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n \r\n\r\nLes solutions pour pr\u00e9venir la d\u00e9formation permanente incluent :\r\n\r\n\r\n\r\n\r\n\r\n
        \r\n
          \r\n \t
        • \u00c9lastom\u00e8re \u00e0 faible d\u00e9formation permanente<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
        \r\n
          \r\n \t
        • Conception de gorge appropri\u00e9e pour l\u2019\u00e9lastom\u00e8re sp\u00e9cifique<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
        \r\n
          \r\n \t
        • Confirmer la compatibilit\u00e9 des mat\u00e9riaux<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row css=\u00a0\u00bb.vc_custom_1785255608778{margin-top: 70px !important;margin-bottom: 100px !important;}\u00a0\u00bb][vc_column width=\u00a0\u00bb1\/3″ css=\u00a0\u00bb.vc_custom_1785359519427{padding-left: 50px !important;}\u00a0\u00bb][vc_column_text css=\u00a0\u00bb\u00a0\u00bb el_id=\u00a0\u00bboutgassing-or-extraction\u00a0\u00bb]\r\n

          D\u00e9gazage ou extraction<\/span><\/h2>\r\n[\/vc_column_text][vc_single_image image=\u00a0\u00bb7078″ img_size=\u00a0\u00bbmedium\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb css=\u00a0\u00bb.vc_custom_1785359617329{margin-top: 40px !important;}\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb1\/2″][vc_column_text css=\u00a0\u00bb.vc_custom_1785359531175{margin-top: 60px !important;}\u00a0\u00bb]Cette d\u00e9faillance est difficile \u00e0 d\u00e9tecter car le joint torique ne pr\u00e9sente g\u00e9n\u00e9ralement aucun changement visible. Dans certains cas, il peut montrer une diminution de la taille de sa section transversale. En g\u00e9n\u00e9ral, le d\u00e9gazage ou les extractions sont caus\u00e9s par un ou plusieurs des facteurs suivants : \r\n\r\n\r\n\r\n\r\n\r\n
          \r\n
            \r\n \t
          • \u00c9lastom\u00e8re inappropri\u00e9 ou mal vulcanis\u00e9<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
          \r\n
            \r\n \t
          • Niveaux de vide \u00e9lev\u00e9s<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
          \r\n
            \r\n \t
          • Faible duret\u00e9 ou \u00e9lastom\u00e8re plastifi\u00e9<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n \r\n\r\nLes solutions pour pr\u00e9venir le d\u00e9gazage incluent :\r\n\r\n\r\n\r\n\r\n
            \r\n
              \r\n \t
            • \u00c9viter les \u00e9lastom\u00e8res plastifi\u00e9s<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
            \r\n
              \r\n \t
            • S\u2019assurer que tous les joints sont correctement post-vulcanis\u00e9s pour minimiser le d\u00e9gazage<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row css=\u00a0\u00bb.vc_custom_1785255608778{margin-top: 70px !important;margin-bottom: 100px !important;}\u00a0\u00bb][vc_column width=\u00a0\u00bb1\/3″ css=\u00a0\u00bb.vc_custom_1785359642453{margin-left: 0px !important;padding-left: 50px !important;}\u00a0\u00bb][vc_column_text css=\u00a0\u00bb\u00a0\u00bb el_id=\u00a0\u00bbinstallation-damage\u00a0\u00bb]\r\n

              Dommage \u00e0 l\u2019installation<\/span><\/h2>\r\n[\/vc_column_text][vc_single_image image=\u00a0\u00bb7079″ img_size=\u00a0\u00bbmedium\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb css=\u00a0\u00bb.vc_custom_1785359885309{margin-top: 40px !important;}\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb1\/2″][vc_column_text css=\u00a0\u00bb.vc_custom_1785359654800{margin-top: 60px !important;margin-right: 0px !important;margin-left: 0px !important;}\u00a0\u00bb]Les dommages subis par le joint torique pendant le processus d\u2019installation se pr\u00e9sentent sous forme de petites coupures, entailles et d\u00e9chirures \u00e0 la surface. Les dommages \u00e0 l\u2019installation peuvent \u00eatre caus\u00e9s par un ou plusieurs des facteurs suivants : \r\n\r\n\r\n\r\n\r\n\r\n\r\n
              \r\n
                \r\n \t
              • Bords tranchants sur les gorges ou les composants<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
              \r\n
                \r\n \t
              • Dimensionnement incorrect de l\u2019\u00e9lastom\u00e8re<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
              \r\n
                \r\n \t
              • \u00c9lastom\u00e8re \u00e0 faible module ou \u00e0 faible duret\u00e9<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
              \r\n
                \r\n \t
              • Contamination de la surface de l\u2019\u00e9lastom\u00e8re<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n \r\n\r\nLes solutions pour pr\u00e9venir les dommages \u00e0 l\u2019installation incluent :\r\n\r\n\r\n\r\n\r\n\r\n\r\n
                \r\n
                  \r\n \t
                • \u00c9liminer tous les bords tranchants<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                \r\n
                  \r\n \t
                • Conception appropri\u00e9e de la gorge<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                \r\n
                  \r\n \t
                • Dimensionnement appropri\u00e9 de l\u2019\u00e9lastom\u00e8re<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                \r\n
                  \r\n \t
                • Utiliser un \u00e9lastom\u00e8re \u00e0 module plus \u00e9lev\u00e9 ou plus dur<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row css=\u00a0\u00bb.vc_custom_1785255608778{margin-top: 70px !important;margin-bottom: 100px !important;}\u00a0\u00bb][vc_column width=\u00a0\u00bb1\/3″ css=\u00a0\u00bb.vc_custom_1785359667791{margin-left: 0px !important;padding-left: 50px !important;}\u00a0\u00bb][vc_column_text css=\u00a0\u00bb\u00a0\u00bb el_id=\u00a0\u00bbchemical-degradation\u00a0\u00bb]\r\n

                  D\u00e9gradation chimique<\/span><\/h2>\r\n[\/vc_column_text][vc_single_image image=\u00a0\u00bb7080″ img_size=\u00a0\u00bbmedium\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb css=\u00a0\u00bb.vc_custom_1785359894998{margin-top: 40px !important;}\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb1\/2″][vc_column_text css=\u00a0\u00bb.vc_custom_1785359680234{margin-top: 60px !important;margin-right: 0px !important;margin-left: 0px !important;}\u00a0\u00bb]Lorsque la d\u00e9gradation chimique se produit, le joint peut pr\u00e9senter des signes tels que des cloques, des fissures, des vides ou une d\u00e9coloration. Dans certains cas, la d\u00e9gradation n\u2019est observable que par la mesure des propri\u00e9t\u00e9s physiques. En g\u00e9n\u00e9ral, la d\u00e9gradation chimique est caus\u00e9e par : \r\n\r\n\r\n\r\n
                  \r\n
                    \r\n \t
                  • Incompatibilit\u00e9 avec l\u2019environnement chimique et\/ou thermique.<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n \r\n\r\nPour \u00e9viter cette d\u00e9faillance, utilisez un \u00e9lastom\u00e8re plus r\u00e9sistant aux produits chimiques.[\/vc_column_text][\/vc_column][\/vc_row][vc_row css=\u00a0\u00bb.vc_custom_1785255608778{margin-top: 70px !important;margin-bottom: 100px !important;}\u00a0\u00bb][vc_column width=\u00a0\u00bb1\/3″ css=\u00a0\u00bb.vc_custom_1785359689912{margin-left: 0px !important;padding-left: 50px !important;}\u00a0\u00bb][vc_column_text css=\u00a0\u00bb\u00a0\u00bb el_id=\u00a0\u00bbthermal-degradation\u00a0\u00bb]\r\n

                    D\u00e9gradation thermique<\/span><\/h2>\r\n[\/vc_column_text][vc_single_image image=\u00a0\u00bb7081″ img_size=\u00a0\u00bbmedium\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb css=\u00a0\u00bb.vc_custom_1785359903179{margin-top: 40px !important;}\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb1\/2″][vc_column_text css=\u00a0\u00bb.vc_custom_1785359699626{margin-top: 60px !important;margin-right: 0px !important;margin-left: 0px !important;}\u00a0\u00bb]La d\u00e9gradation thermique peut provoquer l\u2019apparition de fissures radiales sur les joints toriques. Elles seront situ\u00e9es sur les surfaces les plus chaudes. De plus, certains \u00e9lastom\u00e8res peuvent pr\u00e9senter des signes de ramollissement ou une surface brillante en raison de temp\u00e9ratures excessives. En g\u00e9n\u00e9ral, la d\u00e9gradation thermique est caus\u00e9e par un ou plusieurs des facteurs suivants : \r\n\r\n\r\n\r\n\r\n
                    \r\n
                      \r\n \t
                    • Propri\u00e9t\u00e9s thermiques de l\u2019\u00e9lastom\u00e8re<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                    \r\n
                      \r\n \t
                    • Excursions ou cycles de temp\u00e9rature excessifs<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n \r\n\r\nLes solutions pour pr\u00e9venir les dommages \u00e0 l\u2019installation incluent :\r\n\r\n\r\n\r\n\r\n
                      \r\n
                        \r\n \t
                      • S\u00e9lectionner un \u00e9lastom\u00e8re avec une stabilit\u00e9 thermique am\u00e9lior\u00e9e<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                      \r\n
                        \r\n \t
                      • \u00c9valuation de la possibilit\u00e9 de refroidir les surfaces d\u2019\u00e9tanch\u00e9it\u00e9<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row css=\u00a0\u00bb.vc_custom_1785255608778{margin-top: 70px !important;margin-bottom: 100px !important;}\u00a0\u00bb][vc_column width=\u00a0\u00bb1\/3″ css=\u00a0\u00bb.vc_custom_1785359708830{margin-left: 0px !important;padding-left: 50px !important;}\u00a0\u00bb][vc_column_text css=\u00a0\u00bb\u00a0\u00bb el_id=\u00a0\u00bbspiral-failure\u00a0\u00bb]\r\n

                        D\u00e9faillance en spirale<\/span><\/h2>\r\n[\/vc_column_text][vc_single_image image=\u00a0\u00bb7082″ img_size=\u00a0\u00bbmedium\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb css=\u00a0\u00bb.vc_custom_1785359910903{margin-top: 40px !important;}\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb1\/2″][vc_column_text css=\u00a0\u00bb.vc_custom_1785359719560{margin-top: 60px !important;margin-right: 0px !important;margin-left: 0px !important;}\u00a0\u00bb]Lorsqu\u2019une d\u00e9faillance en spirale se produit, un motif ou une marque en spirale appara\u00eet sur la circonf\u00e9rence du joint torique. Les d\u00e9faillances en spirale sont g\u00e9n\u00e9ralement caus\u00e9es par un ou plusieurs de ces facteurs : \r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
                        \r\n
                          \r\n \t
                        • Installation difficile ou serr\u00e9e (statique)<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                        \r\n
                          \r\n \t
                        • Vitesse de mouvement alternatif lente<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                        \r\n
                          \r\n \t
                        • \u00c9lastom\u00e8re \u00e0 faible module ou durom\u00e8tre<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                        \r\n
                          \r\n \t
                        • Finition de surface irr\u00e9guli\u00e8re du joint torique, y compris un plan de joint excessif<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                        \r\n
                          \r\n \t
                        • Largeur de gorge excessive<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                        \r\n
                          \r\n \t
                        • Finition de surface de gorge irr\u00e9guli\u00e8re ou rugueuse<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                        \r\n
                          \r\n \t
                        • Lubrification inad\u00e9quate<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n \r\n\r\nLes solutions pour pr\u00e9venir les d\u00e9faillances en spirale incluent :\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
                          \r\n
                            \r\n \t
                          • Proc\u00e9dures d\u2019installation correctes<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                          \r\n
                            \r\n \t
                          • Utiliser des \u00e9lastom\u00e8res \u00e0 module plus \u00e9lev\u00e9<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                          \r\n
                            \r\n \t
                          • \u00c9lastom\u00e8res lubrifi\u00e9s en interne<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                          \r\n
                            \r\n \t
                          • Conception appropri\u00e9e de la gorge<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                          \r\n
                            \r\n \t
                          • Finition de surface de gorge de 8 \u00e0 16 micro-pouces RMS<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                          \r\n
                            \r\n \t
                          • Utiliser \u00e9ventuellement des bagues d\u2019appui en polym\u00e8re<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row css=\u00a0\u00bb.vc_custom_1785255608778{margin-top: 70px !important;margin-bottom: 100px !important;}\u00a0\u00bb][vc_column width=\u00a0\u00bb1\/3″ css=\u00a0\u00bb.vc_custom_1785359730075{margin-left: 0px !important;padding-left: 50px !important;}\u00a0\u00bb][vc_column_text css=\u00a0\u00bb\u00a0\u00bb el_id=\u00a0\u00bbplasma-degradation\u00a0\u00bb]\r\n

                            D\u00e9gradation par plasma<\/span><\/h2>\r\n[\/vc_column_text][vc_single_image image=\u00a0\u00bb7083″ img_size=\u00a0\u00bbmedium\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb css=\u00a0\u00bb.vc_custom_1785359918536{margin-top: 40px !important;}\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb1\/2″][vc_column_text css=\u00a0\u00bb.vc_custom_1785359744049{margin-top: 60px !important;}\u00a0\u00bb]Lorsque la d\u00e9gradation par plasma se produit, il y a une \u00e9rosion sur le joint torique l\u00e0 o\u00f9 il a \u00e9t\u00e9 expos\u00e9 au plasma. Ce type de d\u00e9faillance se produit g\u00e9n\u00e9ralement dans les applications \u00e9lectriques. Dans certains cas, cela appara\u00eet comme une d\u00e9coloration ou un r\u00e9sidu poudreux \u00e0 la surface. Les facteurs contributifs peuvent inclure : \r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
                            \r\n
                              \r\n \t
                            • R\u00e9activit\u00e9 chimique du plasma<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                            \r\n
                              \r\n \t
                            • Bombardement ionique (pulv\u00e9risation cathodique)<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                            \r\n
                              \r\n \t
                            • Bombardement \u00e9lectronique (\u00e9chauffement)<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                            \r\n
                              \r\n \t
                            • Conception de gorge incorrecte<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                            \r\n
                              \r\n \t
                            • Mat\u00e9riau de joint incompatible<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n \r\n\r\nLes solutions pour pr\u00e9venir la d\u00e9gradation par plasma incluent :\r\n\r\n\r\n\r\n\r\n\r\n
                              \r\n
                                \r\n \t
                              • \u00c9lastom\u00e8re et compos\u00e9 compatibles avec le plasma<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                              \r\n
                                \r\n \t
                              • Minimiser la zone expos\u00e9e<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                              \r\n
                                \r\n \t
                              • Examiner la conception de la gorge<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row css=\u00a0\u00bb.vc_custom_1785255608778{margin-top: 70px !important;margin-bottom: 100px !important;}\u00a0\u00bb][vc_column width=\u00a0\u00bb1\/3″ css=\u00a0\u00bb.vc_custom_1785359758609{padding-left: 50px !important;}\u00a0\u00bb][vc_column_text css=\u00a0\u00bb\u00a0\u00bb el_id=\u00a0\u00bbcontamination\u00a0\u00bb]\r\n

                                Contamination<\/span><\/h2>\r\n[\/vc_column_text][vc_single_image image=\u00a0\u00bb7084″ img_size=\u00a0\u00bbmedium\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb css=\u00a0\u00bb.vc_custom_1785359928845{margin-top: 40px !important;}\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb1\/2″][vc_column_text css=\u00a0\u00bb.vc_custom_1785359772086{margin-top: 60px !important;}\u00a0\u00bb]Lorsque cette d\u00e9faillance se produit, les mat\u00e9riaux \u00e9trangers ou les contaminants sont visibles \u00e0 la surface du joint torique. En g\u00e9n\u00e9ral, la contamination est caus\u00e9e par : \r\n\r\n\r\n\r\n\r\n\r\n
                                \r\n
                                  \r\n \t
                                • D\u00e9p\u00f4t de l\u2019environnement de processus<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                                \r\n
                                  \r\n \t
                                • R\u00e9actions ou d\u00e9gradation de l\u2019\u00e9lastom\u00e8re<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                                \r\n
                                  \r\n \t
                                • \u00c9lastom\u00e8re non de qualit\u00e9 semi-conducteur<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n \r\n\r\nPour \u00e9viter cette d\u00e9faillance, sp\u00e9cifiez le niveau de contamination, y compris la fabrication et l\u2019emballage des joints.[\/vc_column_text][\/vc_column][\/vc_row][vc_row css=\u00a0\u00bb.vc_custom_1785255608778{margin-top: 70px !important;margin-bottom: 100px !important;}\u00a0\u00bb][vc_column width=\u00a0\u00bb1\/3″ css=\u00a0\u00bb.vc_custom_1785359783427{padding-left: 50px !important;}\u00a0\u00bb][vc_column_text css=\u00a0\u00bb\u00a0\u00bb el_id=\u00a0\u00bbrapid-gas-decompression\u00a0\u00bb]\r\n

                                  D\u00e9compression rapide des gaz<\/span><\/h2>\r\n[\/vc_column_text][vc_single_image image=\u00a0\u00bb7085″ img_size=\u00a0\u00bbmedium\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb css=\u00a0\u00bb.vc_custom_1785359958002{margin-top: 40px !important;}\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb1\/2″][vc_column_text css=\u00a0\u00bb.vc_custom_1785359794866{margin-top: 60px !important;}\u00a0\u00bb]Les joints toriques ayant subi une d\u00e9compression rapide des gaz (DRG) pr\u00e9sentent des cloques, des piq\u00fbres ou des poches \u00e0 leur surface. La DRG se produit lorsqu\u2019il y a absorption de gaz \u00e0 haute pression et la diminution rapide subs\u00e9quente de la pression. Le gaz absorb\u00e9 forme des cloques et rompt la surface de l\u2019\u00e9lastom\u00e8re lorsque la pression est rapidement rel\u00e2ch\u00e9e. En g\u00e9n\u00e9ral, la d\u00e9compression rapide des gaz est caus\u00e9e par : \r\n\r\n\r\n\r\n\r\n\r\n
                                  \r\n
                                    \r\n \t
                                  • Changements de pression rapides<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                                  \r\n
                                    \r\n \t
                                  • Utilisation de mat\u00e9riaux \u00e9lastom\u00e8res sensibles \u00e0 la perm\u00e9ation des gaz<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                                  \r\n
                                    \r\n \t
                                  • \u00c9lastom\u00e8re \u00e0 faible module ou \u00e0 faible duret\u00e9<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n \r\n\r\nLes solutions pour pr\u00e9venir la d\u00e9compression rapide des gaz incluent :\r\n\r\n\r\n\r\n\r\n\r\n\r\n
                                    \r\n
                                      \r\n \t
                                    • Utiliser des compos\u00e9s \u00e9lastom\u00e8res certifi\u00e9s DRG, test\u00e9s selon les normes de l\u2019industrie<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                                    \r\n
                                      \r\n \t
                                    • Ralentir le rel\u00e2chement de la pression du syst\u00e8me<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                                    \r\n
                                      \r\n \t
                                    • Augmenter le remplissage de la gorge tout en veillant \u00e0 ne pas d\u00e9passer 90 %<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
                                    \r\n
                                      \r\n \t
                                    • Choisir un \u00e9lastom\u00e8re \u00e0 module plus \u00e9lev\u00e9 ou plus dur<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n[\/vc_column_text][\/vc_column][\/vc_row]<\/div>","protected":false},"excerpt":{"rendered":"

                                      [vc_row sm=\u00a0\u00bb0″ smb=\u00a0\u00bb0″ md=\u00a0\u00bb0″ mdb=\u00a0\u00bb0″ lg=\u00a0\u00bb0″ css=\u00a0\u00bb.vc_custom_1785339833779{margin-top: 30px !important;margin-bottom: 30px !important;}\u00a0\u00bb][vc_column width=\u00a0\u00bb1\/3″ css=\u00a0\u00bb.vc_custom_1785358269113{padding-left: 50px !important;}\u00a0\u00bb][web3_vc_content sm=\u00a0\u00bb20″ md=\u00a0\u00bb30″ lg=\u00a0\u00bb50″] Contenu Extrusion ou grignotage…<\/p>\n","protected":false},"author":2,"featured_media":7294,"parent":7023,"menu_order":5,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-7072","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"\nD\u00e9faillance courante des joints toriques - Hi-Tech Seals<\/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.hitechseals.com\/fr\/guide-de-conception-des-joints-toriques\/defaillance-courante-des-joints-toriques\/\" \/>\n<meta property=\"og:locale\" content=\"fr_CA\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"D\u00e9faillance courante des joints toriques - 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