{"id":3445,"date":"2023-01-04T16:37:07","date_gmt":"2023-01-04T15:37:07","guid":{"rendered":"https:\/\/www.gt-engineering.it\/normative-tecniche\/%tipologia_normativa%\/safety-requirements\/"},"modified":"2023-05-11T09:57:15","modified_gmt":"2023-05-11T08:57:15","slug":"safety-requirements","status":"publish","type":"normativa_tecnica","link":"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/en-746-2-industrial-thermoprocessing-equipment\/safety-requirements\/","title":{"rendered":"SAFETY REQUIREMENTS"},"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>The <strong>safety goals <\/strong>of this European Standard shall include:<\/p>\n<ul>\n<li>choice of materials such that the construction and operation of the system are not detrimentally affected. In particular, all the components of the fuel pipework shall be capable of withstanding the mechanical, chemical and thermal loads to which they can be subjected during normal operation;<\/li>\n<li>reliable and correct time for ignition of the fuel\/air-mixture at the burner(s);<\/li>\n<li>prevention of unintentional release of unburned fuels;<\/li>\n<li>shut-off fuel-supply in case of relevant fault;<\/li>\n<li>protection of pipeline by precluding the propagation of flame in reverse flow;<\/li>\n<li>prevent firing when the exhaust of combustion products is not ensured;<\/li>\n<li>prevent firing when the process conditions are not in the safe state<br \/>&nbsp;<\/li>\n<\/ul>\n<\/div>            <\/div>\n        \n        \n                <div class=\"clear-both\"><\/div>\n        \n\n    <\/div>\n        <\/section>\n\n    \n\n\n\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:flex-row\">\n\n    \n\n                    <div \n                class=\"order-2 relative w-full md:w-1\/2\"\n            >\n                <div\n                    class=\"pt-6 space-y-6 w-full md:pt-0 md:space-y-4 lg:space-y-8 xl:space-y-9  md:pl-12 xl:pl-24\"\n                >\n                    \n        <div                class=\"m-headings\"\n            >\n    \n    \n<h4 class=\"a-heading text-left text-primary font-heading text-2xl lg:text-3xl xl:text-4xl font-normal mt-2 first:mt-0\">\n                    Required safety devices    <\/h4>\n        <\/div>\n    \n<div class=\"a-text font-text text-base normal mt-8 first:mt-0 space-y-4\">\n    <p>The<span style=\"color: #008080;\">\u00a0<a style=\"color: #008080;\" href=\"https:\/\/www.gt-engineering.it\/en\/insights\/gas-furnaces-ce-marking\/gas-train\/\" target=\"_blank\" rel=\"noopener\"><strong>safety devices<\/strong><\/a><\/span>\u00a0of a combustion system to which EN 746-2 refers are the following:<\/p>\n<ul>\n<li>\u00a0Manual isolating valve;<\/li>\n<li>\u00a0Filter\/strainer;<\/li>\n<li>\u00a0Automatic shut-off valves;<\/li>\n<li>\u00a0Gas pressure regulator;<\/li>\n<li>\u00a0Air and gas flow and pressure detectors;<\/li>\n<li>\u00a0Flue gas venting;<\/li>\n<li>\u00a0Ignition system;<\/li>\n<li>\u00a0Individual manual shut-off valves for burners.<\/li>\n<\/ul>\n<\/div>                <\/div>\n            <\/div>\n        \n                    <div\n                class=\"h-auto order-1 mb-8 md:mb-0   overflow-hidden shadow-content-image w-full md:w-1\/2\"\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\/01\/disp-sic2-150x150.jpg.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 300px)\"\r\n                                width=\"300\"\r\n                                height=\"246\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/01\/disp-sic2-300x246.jpg.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 768px)\"\r\n                                width=\"768\"\r\n                                height=\"631\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/01\/disp-sic2-768x631.jpg.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 818px)\"\r\n                                width=\"818\"\r\n                                height=\"672\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/01\/disp-sic2.jpg.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                            <img\r\n                            class=\"a-image transparent border-image h-auto  w-full mx-auto\"\r\n                                                        srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/01\/disp-sic2.jpg.webp\"\r\n                                                        title=\"disp-sic2\"\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>\n        <\/section>\n\n    \n\n\n\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:flex-row\">\n\n    \n\n                    <div \n                class=\"order-2 relative w-full\"\n            >\n                <div\n                    class=\"pt-6 space-y-6 w-full md:pt-0 md:space-y-4 lg:space-y-8 xl:space-y-9  md:pl-12 xl:pl-24\"\n                >\n                    \n        <div                class=\"m-headings\"\n            >\n    \n    \n<h4 class=\"a-heading text-left text-primary font-heading text-2xl lg:text-3xl xl:text-4xl font-normal mt-2 first:mt-0\">\n                    Combustion Air and Air \/ Gas fuel ratio    <\/h4>\n        <\/div>\n    \n<div class=\"a-text font-text text-base normal mt-8 first:mt-0 space-y-4\">\n    <p>The pipework to\u00a0be designed shall take into account\u00a0the properties of the combustion air.<br \/>\nAll\u00a0manual control devices (registrers, valves, etc.) for the air shall be set in their pre-determined positions and protected against inadvertent movement.<\/p>\n<p>The ventilation of IThE shall be such as to allow an adequate supply of process air and combustion air to reach the burner under all conditions.<\/p>\n<p>The standard EN 746-2 requires that a burner is always ignited with a stable air-gas mixture. The air \/ gas ratio controllers\u00a0allows to satisfy this request.<\/p>\n<p><strong>Combustion ratio control<\/strong> (GARC) is a safety requirement; if this ratio exceeds the required tolerances, it can cause the flame to go out or create a dangerous situation, resulting from the formation of an explosive mixture inside the combustion chamber.<\/p>\n<\/div>                <\/div>\n            <\/div>\n        \n        \n    <\/div>\n        <\/section>\n\n    \n\n\n\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:flex-row\">\n\n    \n\n                    <div \n                class=\"order-2 relative w-full md:w-1\/2\"\n            >\n                <div\n                    class=\"pt-6 space-y-6 w-full md:pt-0 md:space-y-4 lg:space-y-8 xl:space-y-9  md:pl-12 xl:pl-24\"\n                >\n                    \n        <div                class=\"m-headings\"\n            >\n    \n    \n<h4 class=\"a-heading text-left text-primary font-heading text-2xl lg:text-3xl xl:text-4xl font-normal mt-2 first:mt-0\">\n                    Burners and Control systems    <\/h4>\n        <\/div>\n    \n<div class=\"a-text font-text text-base normal mt-8 first:mt-0 space-y-4\">\n    <p>All burners shall\u00a0be suitable for working\u00a0conditions and shall provide operating safety for:<\/p>\n<ul>\n<li>The fuels used (type, pressure, etc &#8230;);<\/li>\n<li>Operating conditions (pressure, temperature, atmosphere, etc &#8230;);<\/li>\n<li>The nominal input rate\u00a0and range of regulation (maximum and minimum capacity);<\/li>\n<li>Ease of\u00a0visual monitoring (sight glasses,sight holes, etc.).<\/li>\n<\/ul>\n<p><strong>The main and pilot flame shall also be adequately controlled.<\/strong><\/p>\n<p>Flame control typically takes place with electronic devices which, connected to flame detectors, control the correct ignition of the flame and the correct steady state operation.<\/p>\n<\/div>                <\/div>\n            <\/div>\n        \n                    <div\n                class=\"h-auto order-1 mb-8 md:mb-0   overflow-hidden shadow-content-image w-full md:w-1\/2\"\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\/01\/burner-control-unit-bcu370-application03-150x150.gif.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 300px)\"\r\n                                width=\"300\"\r\n                                height=\"209\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/01\/burner-control-unit-bcu370-application03-300x209.gif.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 768px)\"\r\n                                width=\"768\"\r\n                                height=\"535\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/01\/burner-control-unit-bcu370-application03-768x535.gif.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 800px)\"\r\n                                width=\"800\"\r\n                                height=\"557\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/01\/burner-control-unit-bcu370-application03.gif.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                            <img\r\n                            class=\"a-image transparent border-image h-auto  w-full mx-auto\"\r\n                                                        srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/01\/burner-control-unit-bcu370-application03.gif.webp\"\r\n                                                        title=\"burner-control-unit-bcu370-application03\"\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>\n        <\/section>\n\n    \n","protected":false},"excerpt":{"rendered":"<p>The safety goals of this European Standard shall include:<\/p>\n<p>\tchoice of materials such that the construction and operation of the system are not detrimentally af&#8230;<\/p>\n","protected":false},"author":1,"featured_media":3143,"parent":3244,"menu_order":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"normative-tecniche":[57],"class_list":["post-3445","normativa_tecnica","type-normativa_tecnica","status-publish","has-post-thumbnail","hentry","tipologia_normativa-en-iso-standards"],"acf":{"sottotitolo":"","allegati":null},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>SAFETY REQUIREMENTS<\/title>\n<meta name=\"description\" content=\"The safety goals of this European Standard shall include: choice of materials such that the construction and operation of the system are not detrimentally af...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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