{"id":741,"date":"2023-02-20T17:44:28","date_gmt":"2023-02-20T16:44:28","guid":{"rendered":"https:\/\/www.gt-engineering.it\/consulenza\/process-safety\/"},"modified":"2023-03-03T09:39:33","modified_gmt":"2023-03-03T08:39:33","slug":"process-safety","status":"publish","type":"consulenza","link":"https:\/\/www.gt-engineering.it\/en\/consulting\/process-safety\/","title":{"rendered":"Process Safety"},"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        \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 style=\"text-align: justify;\">The idea of Functional Safety was formalized with IEC 61508 in 1997.<br \/>Hereafter is&nbsp;an example to explain what functional safety is: we need to protect a tank from&nbsp;cracking caused by high pressure. We can design the tank in order to stand to the maximum possible pressure&nbsp;related to any process dysfunction, or&nbsp;we can realize a safety loop (input\/pressure sensor, safety logic, output\/valve). The loop acts by closing the valve in cae of high pressure. Only the latter case can be&nbsp;considered&nbsp;<strong>Functional Safety<\/strong>.&nbsp;<\/p>\n<p style=\"text-align: justify;\">&nbsp;<\/p>\n<p style=\"text-align: justify;\">Considering that it is not possible to have zero risk, the aim of IEC 61508 is to provide a method to realize safety systems&nbsp;with a well defined reliability. That is achieved&nbsp;through the&nbsp;evaluation of a risk&nbsp;related to an hazardous event and its reduction to a level considered socially acceptable.<\/p>\n<p style=\"text-align: justify;\">&nbsp;<\/p>\n<p style=\"text-align: justify;\">The risk is a function of&nbsp;harm severity and its probability of occurence. For the risk estimation it is always considered the death of a person as harm severity and an occurence of 10<sup>-6<\/sup>\/years in order to get a&nbsp;<strong>socially acceptable risk<\/strong>.<br \/>In other words, each&nbsp;process or machine introduces a risk normally&nbsp;much higher than the socially acceptable level. That risk must be reduced through functional safety systems whose&nbsp;reliability is&nbsp;as high as the risk that the safety system is going to reduce.<\/p>\n<p style=\"text-align: justify;\">&nbsp;<\/p>\n<p style=\"text-align: justify;\">From IEC 61508, several standards are derived. They contain&nbsp;methods to design safety loops whose&nbsp;reliability&nbsp;is suitable for&nbsp;the level of danger that they protect from. Two of the standards derived from EN 61508 are&nbsp;EN 61511 for processes and EN 62061 for machineries.<\/p>\n<p style=\"text-align: justify;\">&nbsp;<\/p>\n<p style=\"text-align: justify;\">EN 61511 is for safety systems in &quot;Low Demand Mode&quot;, which means that the system acts only in case of process failures.<\/p>\n<p style=\"text-align: justify;\">&nbsp;<\/p>\n<p style=\"text-align: justify;\">EN 62061 is for safety systems in &quot;High Demand Mode&quot;, in this case the system acts&nbsp;every time a protection device&nbsp;is activated for the normal operations of the machine. In this case, despite the first case, the safety system operation is requested&nbsp;with a&nbsp;high&nbsp;frequency.<\/p>\n<p style=\"text-align: justify;\">&nbsp;<\/p>\n<p style=\"text-align: justify;\">GT Engineering perform consulting about industrial safety systems applying <strong>EN 61511,&nbsp;<\/strong>including in&nbsp;the Risk Assessment the&nbsp;LOPA method <strong>(<\/strong><strong>Layer of Protective Analisys)<\/strong>.<\/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>GT Engineering offers Consulting on Industrial Process Security applying the standard EN 61511 and LOPA methodology, known as Protective Layer of Analysis).<\/p>\n","protected":false},"author":1,"featured_media":742,"menu_order":10,"template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-741","consulenza","type-consulenza","status-publish","has-post-thumbnail","hentry"],"acf":{"sottotitolo":"Industral Process Security and Conformity to EN 61511"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Industral Process Security and Conformity of Machinaries to EN 61511<\/title>\n<meta name=\"description\" content=\"GT Engineering offers Consulting on Industrial Process Security applying the standard EN 61511 and LOPA methodology, known as Protective Layer of Analysis).\" \/>\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.gt-engineering.it\/en\/consulting\/process-safety\/\" \/>\n<meta property=\"og:locale\" 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