{"id":1496,"date":"2019-10-07T12:04:50","date_gmt":"2019-10-07T11:04:50","guid":{"rendered":"https:\/\/www.spraypeoplegroup.com\/explosion-risks-from-tank-cleaning-the-importance-of-atex\/"},"modified":"2019-10-07T12:20:24","modified_gmt":"2019-10-07T11:20:24","slug":"explosion-risks-from-tank-cleaning-the-importance-of-atex","status":"publish","type":"post","link":"https:\/\/www.spraypeoplegroup.com\/fr\/explosion-risks-from-tank-cleaning-the-importance-of-atex\/","title":{"rendered":"Risques d&rsquo;explosion li\u00e9s au nettoyage de cuves"},"content":{"rendered":"<p><strong>Risques d&rsquo;explosion li\u00e9s au nettoyage de cuves<\/strong><\/p>\n<p><strong>Introduction<\/strong><\/p>\n<p>Le processus de nettoyage des r\u00e9servoirs et des cuves contenant des mati\u00e8res inflammables est une activit\u00e9 risqu\u00e9e. Comme les r\u00e9servoirs seront vides au moment du nettoyage, le risque de pr\u00e9sence de vapeurs ou de poussi\u00e8res explosives augmente pendant le processus de nettoyage. Un r\u00e9servoir d&rsquo;essence vide pr\u00e9sente un risque d&rsquo;explosion beaucoup plus grand qu&rsquo;un r\u00e9servoir plein. Ce fait est bien compris, particuli\u00e8rement dans l&rsquo;industrie maritime.<\/p>\n<p>Trois explosions importantes survenues lors du nettoyage de p\u00e9troliers en 1969 ont donn\u00e9 lieu \u00e0 d&rsquo;importants travaux de recherche sur la s\u00e9curit\u00e9 des op\u00e9rations de nettoyage des citernes. Les conclusions \u00e9taient que les explosions \u00e9taient probablement caus\u00e9es par le syst\u00e8me de nettoyage de la citerne lui-m\u00eame plut\u00f4t que par une autre source d&rsquo;inflammation externe. Cela a incit\u00e9 \u00e0 poursuivre les recherches sur la s\u00e9curit\u00e9 d&rsquo;utilisation des syst\u00e8mes de nettoyage des citernes dans les environnements explosifs. Les r\u00e9sultats de cette enqu\u00eate ont mis en \u00e9vidence certaines sources inattendues de risque d&rsquo;explosion et ont sous-tendu une grande partie des recommandations de conformit\u00e9 de conception ATEX trouv\u00e9es aujourd&rsquo;hui.<\/p>\n<p><strong>Sources potentielles de risque<\/strong><\/p>\n<p>La directive ATEX en g\u00e9n\u00e9ral identifie neuf sources potentielles d&rsquo;inflammation. Tous ne sont pas pertinents pour les syst\u00e8mes de nettoyage de cuves et certains ne le sont que pour certains types de nettoyeurs de r\u00e9servoirs. Bien qu&rsquo;il existe de nombreux mod\u00e8les d&rsquo;\u00e9quipements de nettoyage de r\u00e9servoirs sur le march\u00e9, ils peuvent tous \u00eatre divis\u00e9s en quatre cat\u00e9gories : les buses statiques sans pi\u00e8ces mobiles; les boules rotatives qui tournent sous pression de fluide; les t\u00eates de lavage \u00e0 jet rotatif qui sont actionn\u00e9s par fluide; et les nettoyeurs \u00e0 jet motoris\u00e9s. Le tableau ci-dessous r\u00e9sume comment les sources d&rsquo;inflammation s&rsquo;appliquent \u00e0 chaque classe de nettoyant pour r\u00e9servoir.<\/p>\n<p><strong><img decoding=\"async\" class=\"alignnone size-medium wp-image-1497 lazyload\" data-src=\"https:\/\/www.spraypeoplegroup.com\/wp-content\/uploads\/\/Risques-dexplosions-300x300.jpg\" alt=\"\" width=\"300\" height=\"300\" data-srcset=\"https:\/\/www.spraypeoplegroup.com\/wp-content\/uploads\/Risques-dexplosions-300x300.jpg 300w, https:\/\/www.spraypeoplegroup.com\/wp-content\/uploads\/Risques-dexplosions-150x150.jpg 150w, https:\/\/www.spraypeoplegroup.com\/wp-content\/uploads\/Risques-dexplosions-100x100.jpg 100w, https:\/\/www.spraypeoplegroup.com\/wp-content\/uploads\/Risques-dexplosions-140x140.jpg 140w, https:\/\/www.spraypeoplegroup.com\/wp-content\/uploads\/Risques-dexplosions-500x500.jpg 500w, https:\/\/www.spraypeoplegroup.com\/wp-content\/uploads\/Risques-dexplosions-350x350.jpg 350w, https:\/\/www.spraypeoplegroup.com\/wp-content\/uploads\/Risques-dexplosions-24x24.jpg 24w, https:\/\/www.spraypeoplegroup.com\/wp-content\/uploads\/Risques-dexplosions-36x36.jpg 36w, https:\/\/www.spraypeoplegroup.com\/wp-content\/uploads\/Risques-dexplosions-48x48.jpg 48w, https:\/\/www.spraypeoplegroup.com\/wp-content\/uploads\/Risques-dexplosions.jpg 765w\" data-sizes=\"(max-width: 300px) 100vw, 300px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 300px; --smush-placeholder-aspect-ratio: 300\/300;\" \/><\/strong><\/p>\n<p><strong>\u00c9tincelles d&rsquo;impact et de friction g\u00e9n\u00e9r\u00e9es m\u00e9caniquement <\/strong><\/p>\n<p>Toutes les pi\u00e8ces mobiles peuvent potentiellement servir de source de friction si les forces en jeu sont suffisantes. Pour les nettoyeurs de r\u00e9servoirs rotatifs aliment\u00e9s par fluide fonctionnant \u00e0 basse pression (moins de 4 bar), les forces en jeu sont peu susceptibles de poser un risque de frottement et d&rsquo;\u00e9tincelles. N\u00e9anmoins, la machine en question devra \u00eatre con\u00e7ue et inspect\u00e9e pour s&rsquo;assurer que toutes les pr\u00e9cautions raisonnables ont \u00e9t\u00e9 prises pour att\u00e9nuer ce faible risque. Le risque est nettement plus \u00e9lev\u00e9 pour les lave-cuves \u00e0 haute pression entra\u00een\u00e9s par fluide et pour les lave-cuves \u00e0 moteur.<\/p>\n<p>Avec les t\u00eates de nettoyage de r\u00e9servoir qui sont enti\u00e8rement aliment\u00e9es par le fluide, le risque est beaucoup moins grand simplement parce qu&rsquo;elles ont automatiquement quelques coffres-forts de panne incorpor\u00e9s. La seule source potentielle d&rsquo;impact ou d&rsquo;\u00e9tincelles m\u00e9caniques serait une d\u00e9faillance du syst\u00e8me d&rsquo;engrenage causant une accumulation de chaleur par frottement ou un impact entre deux parties de la machine qui n&rsquo;entrerait normalement pas en contact. Dans un cas comme dans l&rsquo;autre, il est presque certain qu&rsquo;une laveuse \u00e0 r\u00e9servoir \u00e0 fluide s&rsquo;arr\u00eaterait de fonctionner tr\u00e8s rapidement, \u00e9liminant ainsi automatiquement le risque d&rsquo;explosion. Ce n&rsquo;est pas le cas dans les nettoyeurs de r\u00e9servoirs motoris\u00e9s; le fabricant devra donc mettre en place des dispositifs de s\u00e9curit\u00e9 suppl\u00e9mentaires tels qu&rsquo;un syst\u00e8me de coupure du moteur \u00e0 s\u00e9curit\u00e9 int\u00e9gr\u00e9e.<\/p>\n<p><strong>\u00c9tincelles \u00e9lectriques<\/strong><\/p>\n<p>Celles-ci ne s&rsquo;appliqueraient qu&rsquo;aux nettoyeurs de r\u00e9servoirs motoris\u00e9s. Souvent, ce risque est att\u00e9nu\u00e9 car le moteur se trouve \u00e0 l&rsquo;ext\u00e9rieur de l&rsquo;environnement explosif. Tout nettoyeur de r\u00e9servoir motoris\u00e9 devra toujours \u00eatre dot\u00e9 de dispositifs de s\u00e9curit\u00e9 suffisamment redondants pour assurer une mise \u00e0 la terre compl\u00e8te. Pour les environnements de zone 0, cela signifie que les fonctions de s\u00e9curit\u00e9 sont doublement redondantes, de sorte que m\u00eame en cas de d\u00e9faillance de l&rsquo;un d&rsquo;eux, la machine peut continuer \u00e0 fonctionner en toute s\u00e9curit\u00e9.<\/p>\n<p><strong>Temp\u00e9rature de surface \u00e9lev\u00e9e<\/strong><\/p>\n<p>Ces risques sont similaires pour les \u00e9tincelles g\u00e9n\u00e9r\u00e9es m\u00e9caniquement. Encore une fois, les nettoyeurs \u00e0 fluide ont g\u00e9n\u00e9ralement une caract\u00e9ristique de s\u00e9curit\u00e9 \u00ab\u00a0naturelle\u00a0\u00bb en ce sens que si une surchauffe se produisait, cela signifierait une d\u00e9faillance grave du syst\u00e8me d&rsquo;engrenage qui aurait tendance \u00e0 emp\u00eacher la machine de se d\u00e9placer. Il faut \u00eatre plus prudent avec les nettoyeurs de r\u00e9servoirs motoris\u00e9s, car un d\u00e9faut d&rsquo;engrenage similaire pourrait entra\u00eener une accumulation de chaleur par frottement. Ainsi, des dispositifs de s\u00e9curit\u00e9 suppl\u00e9mentaires devront \u00eatre int\u00e9gr\u00e9s dans la conception du nettoyeur de r\u00e9servoir.<\/p>\n<p><strong>D\u00e9charge \u00e9lectrostatique<\/strong><\/p>\n<p>C&rsquo;est peut-\u00eatre le plus grand risque d&rsquo;explosion des nettoyeurs de r\u00e9servoirs. Toute machine en mouvement qui n&rsquo;est pas mise \u00e0 la terre peut accumuler une charge. Les machines de nettoyage des cuves seront g\u00e9n\u00e9ralement construites en m\u00e9tal et pulv\u00e9riseront de l&rsquo;eau, deux excellents conducteurs de l&rsquo;\u00e9lectricit\u00e9. Cela signifie qu&rsquo;en fonctionnement normal, ils doivent toujours rester enti\u00e8rement mis \u00e0 la terre. Cela \u00e9tant dit, il y a encore des sujets de pr\u00e9occupation.<\/p>\n<p>Les engrenages des nettoyeurs de r\u00e9servoirs rotatifs ne sont souvent pas en m\u00e9tal. Les engrenages PEEK courants dans de nombreuses nettoyeurs de cuves entra\u00een\u00e9es par fluide sont une source potentielle d&rsquo;accumulation statique et les machines certifi\u00e9es ATEX auront donc \u00e9t\u00e9 v\u00e9rifi\u00e9es pour s&rsquo;assurer que des mesures de s\u00e9curit\u00e9 suffisantes ont \u00e9t\u00e9 prises pour r\u00e9duire ce risque.<\/p>\n<p>Les jets d&rsquo;eau des nettoyeurs rotatifs pourraient potentiellement retenir une charge s&rsquo;ils n&rsquo;\u00e9taient pas mis \u00e0 la terre. En fonctionnement normal, les jets de nettoyage seraient toujours en contact avec la cuve ou avec la t\u00eate de lavage et resteraient ainsi mis \u00e0 la terre. Cependant, si, pour quelque raison que ce soit, le laveur de r\u00e9servoir devait pulser des jets produisant des masses d&rsquo;eau, les recherches ont d\u00e9montr\u00e9 qu&rsquo;il s&rsquo;agissait d&rsquo;une source potentielle d&rsquo;\u00e9tincelles \u00e9lectrostatiques[1]. En pratique, ce risque peut \u00eatre \u00e9limin\u00e9 en s&rsquo;assurant que les laveuses de r\u00e9servoirs sont install\u00e9es dans des cuves de dimensions appropri\u00e9es de mani\u00e8re \u00e0 ce que le contact soit toujours maintenu. Ceci se trouve dans le mode d&#8217;emploi de la machine de lavage. Toute certification ATEX est toujours subordonn\u00e9e \u00e0 l&rsquo;utilisation de la machine conform\u00e9ment au mode d&#8217;emploi, de sorte qu&rsquo;il vaut la peine de v\u00e9rifier la taille maximale recommand\u00e9e du r\u00e9servoir.<\/p>\n<p>Une autre zone grise est de savoir s&rsquo;il y a un risque d&rsquo;\u00e9tincelles \u00e0 cause d&rsquo;un brouillard d&rsquo;eau form\u00e9 par le nettoyeur du r\u00e9servoir. Tous les nettoyeurs de r\u00e9servoirs ont le potentiel de cr\u00e9er des brouillards d&rsquo;eau, m\u00eame les nettoyeurs \u00e0 jet solide qui peuvent potentiellement cr\u00e9er un certain brouillard lorsque la buse s&rsquo;\u00e9teint et s&rsquo;allume. L&rsquo;Universit\u00e9 de Southampton a men\u00e9 des recherches sur les risques associ\u00e9s aux brumes charg\u00e9es. Les conclusions sont mitig\u00e9es, mais le consensus est que m\u00eame si le risque li\u00e9 aux brumes charg\u00e9es est probablement tr\u00e8s faible, il ne peut \u00eatre \u00e9cart\u00e9.<\/p>\n<p>La temp\u00e9rature du brouillard influence son potentiel de charge. Cependant, cette relation n&rsquo;est pas simple. Comme la recherche n&rsquo;est pas tr\u00e8s concluante, les recommandations g\u00e9n\u00e9rales sont que le liquide de lavage devrait \u00eatre maintenu en dessous de 60Co pour le nettoyage des environnements explosifs. D&rsquo;autres recommandations incluent de ne pas utiliser de nettoyants chimiques dans ces environnements et de ne pas utiliser d&rsquo;eau recycl\u00e9e car les deux peuvent potentiellement augmenter la capacit\u00e9 de porter de charge des brumes.<\/p>\n<p><strong>Conclusion<\/strong><\/p>\n<p>On pense parfois \u00e0 tort que les t\u00eates de nettoyage des r\u00e9servoirs sont relativement s\u00fbres du point de vue du risque d&rsquo;explosion. En ce qui concerne le risque d&rsquo;explosion, l&rsquo;accent est surtout mis sur les risques les plus \u00e9vidents li\u00e9s aux machines \u00e9lectriques et autres machines \u00e9lectriques. Souvent, un nettoyeur \u00e0 jet rotatif aliment\u00e9 par un fluide n&rsquo;est pas consid\u00e9r\u00e9 comme une source de risque. La r\u00e9alit\u00e9 est que les op\u00e9rations de nettoyage des citernes sont une p\u00e9riode des plus dangereuses. Ainsi, s&rsquo;il est vrai que les risques intrins\u00e8ques d&rsquo;une source d&rsquo;inflammation sont faibles par rapport \u00e0 d&rsquo;autres types d&rsquo;\u00e9quipements, le fait m\u00eame qu&rsquo;une cuve contienne un r\u00e9sidu de vapeur lors de son nettoyage signifie que m\u00eame ces faibles risques sont amplifi\u00e9s et ne peuvent donc \u00eatre ignor\u00e9s.<\/p>\n<p>Les travaux de recherche et de d\u00e9veloppement men\u00e9s au cours des derni\u00e8res d\u00e9cennies ont permis de mettre au point des syst\u00e8mes de nettoyage de citernes s\u00fbrs et adapt\u00e9s \u00e0 une utilisation dans des environnements ATEX zone 0. Plusieurs fabricants sont pass\u00e9s par le processus laborieux et co\u00fbteux de la certification ATEX pour leurs gammes de nettoyage de r\u00e9servoirs.<\/p>\n<p>C&rsquo;est la bonne nouvelle. La mauvaise nouvelle, c&rsquo;est que la copie et le clonage de ces machines laissent sur le march\u00e9 de nombreux nettoyeurs rotatifs qui se ressemblent beaucoup mais qui n&rsquo;ont aucune certification. En tant que tel, leur utilisation repose enti\u00e8rement sur le vague espoir que la machine a bien \u00e9t\u00e9 fabriqu\u00e9e et tient compte de toute la sagesse durement acquise au cours des derni\u00e8res d\u00e9cennies. S&rsquo;il y a un conseil \u00e0 retenir de cet article, c&rsquo;est de v\u00e9rifier que la t\u00eate de nettoyage de r\u00e9servoir utilis\u00e9e poss\u00e8de une certification pour l&rsquo;environnement dans lequel elle est utilis\u00e9e. Ne vous laissez jamais emporter par des caprices insignifiants comme \u00ab\u00a0il est conforme aux sp\u00e9cifications ATEX\u00a0\u00bb ou qu&rsquo;il s&rsquo;agit en quelque sorte d&rsquo;une \u00ab\u00a0conception exempte d&rsquo;ATEX\u00a0\u00bb. A moins qu&rsquo;il ne s&rsquo;agisse d&rsquo;un nettoyeur de r\u00e9servoir compl\u00e8tement immobile (c&rsquo;est-\u00e0-dire une buse statique), il doit \u00eatre certifi\u00e9 ATEX.<\/p>\n[1] A study of electrical discharges in a charged water aerosol, J F Hughes, A W Bright, B Makin and I F Parker, J. Phys. D: Appl. Phys., Vol. 6, 1973.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Risques d&rsquo;explosion li\u00e9s au nettoyage de cuves Introduction Le processus de nettoyage des r\u00e9servoirs et des cuves contenant des mati\u00e8res inflammables est une activit\u00e9 risqu\u00e9e. Comme les r\u00e9servoirs seront vides&#8230;<\/p>\n","protected":false},"author":3,"featured_media":1483,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"content-type":"","footnotes":""},"categories":[16],"tags":[48,49,50],"class_list":{"0":"post-1496","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-non-classifiee","8":"tag-atex-certified-tank-cleaners-fr","9":"tag-atex-rotary-jet-cleaners-fr","10":"tag-cip-in-tanks-with-flammable-materials-fr"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Explosion Risks From Tank Cleaning | The Importance Of ATEX<\/title>\n<meta name=\"description\" content=\"The process of cleaning tanks and vessels that contained flammable materials is a risky business. As tanks will be empty when the cleaning process is undertaken the potential for explosive vapours or dusts to be present is increased during the cleaning process. Tank cleaners with ATEX certification mitigate this risk.\" \/>\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.spraypeoplegroup.com\/fr\/explosion-risks-from-tank-cleaning-the-importance-of-atex\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Explosion Risks From Tank Cleaning | The Importance Of ATEX\" \/>\n<meta property=\"og:description\" content=\"The process of cleaning tanks and vessels that contained flammable materials is a risky business. As tanks will be empty when the cleaning process is undertaken the potential for explosive vapours or dusts to be present is increased during the cleaning process. Tank cleaners with ATEX certification mitigate this risk.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.spraypeoplegroup.com\/fr\/explosion-risks-from-tank-cleaning-the-importance-of-atex\/\" \/>\n<meta property=\"og:site_name\" content=\"The Spray People Group (SPG)\" \/>\n<meta property=\"article:published_time\" content=\"2019-10-07T11:04:50+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2019-10-07T11:20:24+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.spraypeoplegroup.com\/wp-content\/uploads\/atex.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"720\" \/>\n\t<meta property=\"og:image:height\" content=\"340\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Catherine Lees\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Catherine Lees\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"8 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.spraypeoplegroup.com\\\/fr\\\/explosion-risks-from-tank-cleaning-the-importance-of-atex\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.spraypeoplegroup.com\\\/fr\\\/explosion-risks-from-tank-cleaning-the-importance-of-atex\\\/\"},\"author\":{\"name\":\"Catherine Lees\",\"@id\":\"https:\\\/\\\/www.spraypeoplegroup.com\\\/fr\\\/#\\\/schema\\\/person\\\/071e7d7f324137822c49dd3fe59ef42f\"},\"headline\":\"Risques d&rsquo;explosion li\u00e9s au nettoyage de cuves\",\"datePublished\":\"2019-10-07T11:04:50+00:00\",\"dateModified\":\"2019-10-07T11:20:24+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.spraypeoplegroup.com\\\/fr\\\/explosion-risks-from-tank-cleaning-the-importance-of-atex\\\/\"},\"wordCount\":1765,\"publisher\":{\"@id\":\"https:\\\/\\\/www.spraypeoplegroup.com\\\/fr\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.spraypeoplegroup.com\\\/fr\\\/explosion-risks-from-tank-cleaning-the-importance-of-atex\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.spraypeoplegroup.com\\\/wp-content\\\/uploads\\\/atex.jpg\",\"keywords\":[\"ATEX certified tank cleaners\",\"ATEX rotary jet cleaners\",\"CIP in tanks with flammable materials\"],\"articleSection\":[\"Non classifi\u00e9(e)\"],\"inLanguage\":\"fr-FR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.spraypeoplegroup.com\\\/fr\\\/explosion-risks-from-tank-cleaning-the-importance-of-atex\\\/\",\"url\":\"https:\\\/\\\/www.spraypeoplegroup.com\\\/fr\\\/explosion-risks-from-tank-cleaning-the-importance-of-atex\\\/\",\"name\":\"Explosion Risks From Tank Cleaning | The Importance Of ATEX\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.spraypeoplegroup.com\\\/fr\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.spraypeoplegroup.com\\\/fr\\\/explosion-risks-from-tank-cleaning-the-importance-of-atex\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.spraypeoplegroup.com\\\/fr\\\/explosion-risks-from-tank-cleaning-the-importance-of-atex\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.spraypeoplegroup.com\\\/wp-content\\\/uploads\\\/atex.jpg\",\"datePublished\":\"2019-10-07T11:04:50+00:00\",\"dateModified\":\"2019-10-07T11:20:24+00:00\",\"description\":\"The process of cleaning tanks and vessels that contained flammable materials is a risky business. 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