{"id":37487,"date":"2023-02-10T14:26:09","date_gmt":"2023-02-10T13:26:09","guid":{"rendered":"https:\/\/www.gt-engineering.it\/?post_type=approfondimento&#038;p=37487"},"modified":"2025-07-17T07:17:27","modified_gmt":"2025-07-17T06:17:27","slug":"directive-atex-99-92-ce-quest-ce-que-le-degre-demission","status":"publish","type":"approfondimento","link":"https:\/\/www.gt-engineering.it\/fr\/approfondissement\/risque-atex\/directive-atex-99-92-ce-et-risques-dexplosion\/directive-atex-99-92-ce-quest-ce-que-le-degre-demission\/","title":{"rendered":"DIRECTIVE ATEX 99\/92\/CE &#8211; Qu&rsquo;est-ce que le degr\u00e9 d&rsquo;\u00e9mission ?"},"content":{"rendered":"\n\n    \n        <section\n            data-name=\"Contenuto testuale con immagine\"\n            class=\"bow-gte-testo-media u-spacer-base\"\n            id=\"\"\n        >\n            \n<div class=\"o-text-media px-side-spacer sm:px-side-spacer-sm lg:px-side-spacer-tablet 2xl:px-side-spacer-desktop flex flex-wrap items-start md:block\">\n\n    \n        \n                    <div\n                class=\"h-auto mb-6 md:mb-4 lg:mb-8 xl:mb-9 float-left mr-6 md:mr-4 lg:mr-8 xl:mr-9  overflow-hidden shadow-content-image w-full md:w-1\/3\"\n            >\n                \r\n\r\n    \r\n        \r\n            \r\n                \r\n                    <picture\r\n                        class=\"\"\r\n                                            >\r\n                                                                                                        <source\r\n                                media=\"(max-width: 150px)\"\r\n                                width=\"150\"\r\n                                height=\"150\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/02\/R-150x150.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 300px)\"\r\n                                width=\"300\"\r\n                                height=\"215\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/02\/R-300x215.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 768px)\"\r\n                                width=\"768\"\r\n                                height=\"552\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/02\/R-768x552.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 1024px)\"\r\n                                width=\"1024\"\r\n                                height=\"735\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/02\/R-1024x735.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                            <img\r\n                            class=\"a-image transparent border-image h-auto  w-full\"\r\n                                                        srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/02\/R.png.webp\"\r\n                                                        title=\"R\"\r\n                                                        type=\"image\/webp\"\r\n                        \/>\r\n                    <\/picture>\r\n\r\n                \r\n\r\n                    \r\n    \r\n            <\/div>\n        \n                    <div class=\"relative w-full\">\n                \n<div class=\"a-text font-text text-base normal mt-8 first:mt-0 space-y-4\">\n    <p>Un degr\u00e9 est l&rsquo;identification de la probabilit\u00e9 plus ou moins grande qu&rsquo;une source puisse effectivement \u00e9mettre des gaz dans l&rsquo;atmosph\u00e8re ; les degr\u00e9s d&rsquo;\u00e9mission, par ordre d\u00e9croissant de probabilit\u00e9 d&rsquo;\u00e9mission, peuvent \u00eatre : continu, premier et second. Ces degr\u00e9s s&rsquo;entendent comme suit :<\/p>\n<ul>\n<li><strong>Continu<\/strong> si l&rsquo;\u00e9mission est continue ou peut se produire sur de longues p\u00e9riodes dans le cadre du fonctionnement ordinaire d&rsquo;un \u00e9quipement de traitement (surface libre d&rsquo;un liquide dans un bassin).<\/li>\n<li><strong>Premier<\/strong> si l&rsquo;\u00e9mission peut se produire p\u00e9riodiquement ou occasionnellement dans le cadre du fonctionnement ordinaire de l&rsquo;\u00e9quipement de traitement (\u00e9chantillonnage, drainage, points d&rsquo;inspection).<\/li>\n<li><strong>Second<\/strong>, si l&rsquo;\u00e9mission n&rsquo;est pas pr\u00e9vue dans le cadre du fonctionnement normal de l&rsquo;\u00e9quipement de traitement, mais ne peut se produire qu&rsquo;occasionnellement et pendant de courtes p\u00e9riodes, par exemple \u00e0 la suite d&rsquo;une d\u00e9faillance (brides, vannes, \u00e9vents de s\u00e9curit\u00e9).<\/li>\n<\/ul>\n<p>Outre le degr\u00e9 d&rsquo;\u00e9mission, il faut \u00e9galement tenir compte de la <strong>ventilation du local<\/strong>. On parle alors de degr\u00e9 de ventilation et de <strong>disponibilit\u00e9 de la ventilation.<\/strong><\/p>\n<p>Le niveau d&rsquo;\u00e9mission de la source, ainsi que la ventilation de la pi\u00e8ce, influencent la dangerosit\u00e9 et la classification d&rsquo;une zone ATEX qui en d\u00e9coule.<\/p>\n<\/div>            <\/div>\n        \n        \n                <div class=\"clear-both\"><\/div>\n        \n\n    <\/div>\n        <\/section>\n\n    \n","protected":false},"excerpt":{"rendered":"<p>Un degr\u00e9 est l&rsquo;identification de la probabilit\u00e9 plus ou moins grande qu&rsquo;une source puisse effectivement \u00e9mettre des gaz dans l&rsquo;atmosph\u00e8re ; les degr\u00e9s d&rsquo;\u00e9mission, par ordre d\u00e9croissant de probabilit\u00e9 d&rsquo;\u00e9mission, peuvent \u00eatre<\/p>\n","protected":false},"author":182,"featured_media":37480,"parent":37462,"menu_order":1,"template":"","meta":{"_acf_changed":false,"footnotes":""},"tipologia_approfondimento":[162],"class_list":["post-37487","approfondimento","type-approfondimento","status-publish","has-post-thumbnail","hentry","tipologia_approfondimento-risque-atex"],"acf":{"sottotitolo":"Les degr\u00e9s d'\u00e9mission continue, premi\u00e8re et deuxi\u00e8me","allegati":null},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>DIRECTIVE ATEX 99\/92\/CE - Qu&#039;est-ce que le degr\u00e9 d&#039;\u00e9mission ? 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