{"id":24560,"date":"2023-06-07T10:27:30","date_gmt":"2023-06-07T14:27:30","guid":{"rendered":"https:\/\/world.dan.org\/?post_type=dan_alert_diver&#038;p=24560"},"modified":"2023-07-12T13:35:42","modified_gmt":"2023-07-12T17:35:42","slug":"mismatched-scuba-valves-to-cylinder-outlets","status":"publish","type":"dan_alert_diver","link":"https:\/\/world.dan.org\/es\/alert-diver\/article\/mismatched-scuba-valves-to-cylinder-outlets\/","title":{"rendered":"V\u00e1lvulas de buceo incompatibles con las salidas de cilindros"},"content":{"rendered":"<p><strong>UNA INCOMPATIBILIDAD ENTRE V\u00c1LVULAS Y CILINDROS<\/strong> recientemente tuvo consecuencias mortales en Europa. Este problema puede evitarse con una capacitaci\u00f3n formal y espec\u00edfica del uso y una comprensi\u00f3n b\u00e1sica de los tipos de v\u00e1lvula de los tanques de buceo y de rosca de los cilindros.<\/p>\n\n\n\n<div style=\"height:9px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading has-dan-blue-200-color has-text-color\" id=\"h-why-does-this-happen\">\u00bfPor qu\u00e9 sucede esto?&nbsp;<\/h2>\n\n\n\n<p>En los Estados Unidos, la rosca paralela de cuello de cilindro m\u00e1s com\u00fan hoy en d\u00eda es la rosca de tuber\u00eda recta nacional para juntas mec\u00e1nicas (National Pipe Straight Mechanical, NPSM) de \u00be de pulgada con 14 roscas por pulgada (TPI, por sus siglas en ingl\u00e9s). La rosca de cuello de cilindro m\u00e9trico m\u00e1s com\u00fan es la M25 x 2 \u2013 ISO con 12,7 TPI, que a menudo se conoce err\u00f3neamente como el equivalente m\u00e9trico de una NPSM de \u00be de pulgada.&nbsp;<\/p>\n\n\n\n<p>Si bien inicialmente puede parecer que una v\u00e1lvula con una rosca M25 puede ser compatible con un cuello de cilindro con una rosca NPSM, ser\u00e1 necesario usar m\u00e1s fuerza para ajustarla y probablemente no se cierre correctamente, por lo que habr\u00e1 que ajustarla excesivamente para lograr un buen cierre. Esto puede tener \u2014y ha tenido\u2014 consecuencias desastrosas. Para complicar a\u00fan m\u00e1s la situaci\u00f3n, una v\u00e1lvula con rosca M25 aparentemente tambi\u00e9n ser\u00e1 compatible con un cilindro con rosca BSP (British Standard Pipe, BSP) de \u00be de pulgada, pero solo despu\u00e9s de da\u00f1ar las roscas.<\/p>\n\n\n\n<div style=\"height:11px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading has-dan-blue-200-color has-text-color\"><strong>\u00bfC\u00f3mo llegamos aqu\u00ed?&nbsp;<\/strong><\/h2>\n\n\n\n<p>Antes de 1958, la mayor\u00eda de los cilindros de buceo de los Estados Unidos ten\u00edan roscas americanas para gas c\u00f3nicas (National Gas Tapered, NGT) de \u00bd pulgada. A continuaci\u00f3n hubo una transici\u00f3n gradual a la rosca NPSM paralela de \u00be de pulgada para buceo con aire comprimido y alrededor de 1970 se acept\u00f3 como la norma. En 2006 el gobierno de los Estados Unidos acept\u00f3 los cilindros de la International Standards Organization (ISO) para su uso en los Estados Unidos y sus territorios. Los cilindros con rosca m\u00e9trica ISO deben tener la rosca de salida estampada en la corona (por ejemplo, M25 x 2).&nbsp;<\/p>\n\n\n\n<p>La Asociaci\u00f3n de Gas Comprimido (Compressed Gas Association, CGA) recomienda que los cilindros certificados seg\u00fan la especificaci\u00f3n del Departamento de Transporte (DOT, por sus siglas en ingl\u00e9s) de los Estados Unidos tengan estampado un c\u00f3digo de la CGA, una recomendaci\u00f3n que a menudo es omitida o malinterpretada. La marca estampada de la CGA para la rosca NPSM de \u00be de pulgada es SP12. El equivalente de la CGA para la rosca ISO M25 x 2 es 25P. Despu\u00e9s de 2009 la CGA ha requerido que las v\u00e1lvulas de los cilindros tambi\u00e9n tengan estampada la misma marca.&nbsp;<\/p>\n\n\n\n<p>Un t\u00e9cnico de buceo prudente debe usar un medidor o verificador de rosca para comprobar las roscas cuando no haya marcas presentes.&nbsp;<\/p>\n\n\n\n<div style=\"height:11px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading has-dan-blue-200-color has-text-color\"><strong>Consecuencias<\/strong><\/h2>\n\n\n\n<p>Debido a la amplia aceptaci\u00f3n de los cilindros m\u00e9tricos ISO, ha habido un aumento en la incompatibilidad de las conexiones entre v\u00e1lvulas y cilindros. Una v\u00e1lvula M25 x 2 comenzar\u00e1 a enroscarse en una rosca NPSM de \u00be de pulgada a la altura de aproximadamente la tercera a la quinta rosca y luego empezar\u00e1 a atascarse. Los t\u00e9cnicos inexpertos pueden asumir que esto es normal y usar una llave para continuar instalando la v\u00e1lvula y, por tanto, da\u00f1ar las roscas. La diferencia en el dise\u00f1o de las roscas de la v\u00e1lvula m\u00e9trica puede da\u00f1ar las roscas en la salida de los cilindros con rosca de Estados Unidos con consecuencias potencialmente catastr\u00f3ficas.&nbsp;<\/p>\n\n\n\n<div style=\"height:9px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading has-dan-blue-200-color has-text-color\"><strong>Gu\u00eda esencial<\/strong><\/h2>\n\n\n\n<p>No se debe forzar, <strong>bajo ninguna circunstancia,<\/strong> una v\u00e1lvula con rosca paralela sellada con una junta t\u00f3rica en un cilindro. Todo lo que se necesita es un ajuste manual para instalar la v\u00e1lvula, ya sea de Estados Unidos o m\u00e9trica, al punto donde la v\u00e1lvula toque la cara superior del cilindro. Despu\u00e9s de la instalaci\u00f3n manual de la v\u00e1lvula, la persona debe aplicar torque para comprimir la junta t\u00f3rica, garantizar un cierre fuerte y evitar que se afloje inadvertidamente.&nbsp;<\/p>\n\n\n\n<p>El torque es una unidad de medida definida como libra fuerza pie (lb<sub>f<\/sub>ft) o Newton metro (N m). La especificaci\u00f3n de torque para los cilindros de buceo con aire comprimido normalmente es de 50 lb\u2219<sub>f<\/sub>. ft o 67,5 N\u2219m.&nbsp;<\/p>\n\n\n\n<p>Un t\u00e9cnico de buceo prudente debe recibir capacitaci\u00f3n formal para comprender mejor todos los aspectos de las conexiones de cilindros y v\u00e1lvulas y las herramientas que se utilizan para garantizar que las roscas sean correctas, as\u00ed como tambi\u00e9n para asegurarse de comprender las especificaciones de roscas, juntas t\u00f3ricas, lubricantes y torque.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-small-font-size\">\u00a9&nbsp;<em>Alert Diver<\/em>&nbsp;- Q2 2023<\/p>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>","protected":false},"excerpt":{"rendered":"<p>UNA INCOMPATIBILIDAD ENTRE V\u00c1LVULAS Y CILINDROS recientemente tuvo consecuencias mortales en Europa. Este problema puede evitarse con una capacitaci\u00f3n formal y espec\u00edfica del uso y una comprensi\u00f3n b\u00e1sica de los tipos de v\u00e1lvula de los tanques de buceo y de rosca de los cilindros.<\/p>","protected":false},"featured_media":24562,"template":"","dan_alert_diver_categories":[468],"dan_alert_diver_issues":[485],"class_list":["post-24560","dan_alert_diver","type-dan_alert_diver","status-publish","has-post-thumbnail","hentry","dan_alert_diver_categories-risk-mitigation","dan_alert_diver_issues-q2-2023"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.0 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Mismatched Scuba Valves to Cylinder Outlets - DAN World<\/title>\n<meta name=\"description\" content=\"A VALVE-TO-CYLINDER MISMATCH mismatch recently resulted in a deadly outcome in Europe. This issue is preventable with formal, function-specific training and a basic understanding of scuba tank valves and cylinder threads.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/world.dan.org\/es\/alert-diver\/article\/mismatched-scuba-valves-to-cylinder-outlets\/\" \/>\n<meta property=\"og:locale\" content=\"es_MX\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Mismatched Scuba Valves to Cylinder Outlets\" \/>\n<meta property=\"og:description\" content=\"A VALVE-TO-CYLINDER MISMATCH mismatch recently resulted in a deadly outcome in Europe. This issue is preventable with formal, function-specific training and a basic understanding of scuba tank valves and cylinder threads.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/world.dan.org\/es\/alert-diver\/article\/mismatched-scuba-valves-to-cylinder-outlets\/\" \/>\n<meta property=\"og:site_name\" content=\"DAN World\" \/>\n<meta property=\"article:modified_time\" content=\"2023-07-12T17:35:42+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/world.dan.org\/wp-content\/uploads\/2023\/06\/64-Risk-Mitigation-Q2_27_RiskMitigation-web.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"600\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:description\" content=\"A VALVE-TO-CYLINDER MISMATCH mismatch recently resulted in a deadly outcome in Europe. This issue is preventable with formal, function-specific training and a basic understanding of scuba tank valves and cylinder threads.\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/world.dan.org\\\/alert-diver\\\/article\\\/mismatched-scuba-valves-to-cylinder-outlets\\\/\",\"url\":\"https:\\\/\\\/world.dan.org\\\/alert-diver\\\/article\\\/mismatched-scuba-valves-to-cylinder-outlets\\\/\",\"name\":\"Mismatched Scuba Valves to Cylinder Outlets - DAN World\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/world.dan.org\\\/es\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/world.dan.org\\\/alert-diver\\\/article\\\/mismatched-scuba-valves-to-cylinder-outlets\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/world.dan.org\\\/alert-diver\\\/article\\\/mismatched-scuba-valves-to-cylinder-outlets\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/world.dan.org\\\/wp-content\\\/uploads\\\/2023\\\/06\\\/64-Risk-Mitigation-Q2_27_RiskMitigation-web.jpg\",\"datePublished\":\"2023-06-07T14:27:30+00:00\",\"dateModified\":\"2023-07-12T17:35:42+00:00\",\"description\":\"A VALVE-TO-CYLINDER MISMATCH mismatch recently resulted in a deadly outcome in Europe. This issue is preventable with formal, function-specific training and a basic understanding of scuba tank valves and cylinder threads.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/world.dan.org\\\/alert-diver\\\/article\\\/mismatched-scuba-valves-to-cylinder-outlets\\\/#breadcrumb\"},\"inLanguage\":\"es-MX\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/world.dan.org\\\/alert-diver\\\/article\\\/mismatched-scuba-valves-to-cylinder-outlets\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"es-MX\",\"@id\":\"https:\\\/\\\/world.dan.org\\\/alert-diver\\\/article\\\/mismatched-scuba-valves-to-cylinder-outlets\\\/#primaryimage\",\"url\":\"https:\\\/\\\/world.dan.org\\\/wp-content\\\/uploads\\\/2023\\\/06\\\/64-Risk-Mitigation-Q2_27_RiskMitigation-web.jpg\",\"contentUrl\":\"https:\\\/\\\/world.dan.org\\\/wp-content\\\/uploads\\\/2023\\\/06\\\/64-Risk-Mitigation-Q2_27_RiskMitigation-web.jpg\",\"width\":1200,\"height\":600,\"caption\":\"The valve on the left is suitable for 3\\\/4-inch NPSM cylinder threads. The valve on the right will erroneously thread into a 3\\\/4-inch NPSM cylinder neck for about three to five threads before it begins to bind.\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/world.dan.org\\\/alert-diver\\\/article\\\/mismatched-scuba-valves-to-cylinder-outlets\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/world.dan.org\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Mismatched Scuba Valves to Cylinder Outlets\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/world.dan.org\\\/es\\\/#website\",\"url\":\"https:\\\/\\\/world.dan.org\\\/es\\\/\",\"name\":\"DAN World\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/world.dan.org\\\/es\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/world.dan.org\\\/es\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"es-MX\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/world.dan.org\\\/es\\\/#organization\",\"name\":\"DAN World\",\"url\":\"https:\\\/\\\/world.dan.org\\\/es\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"es-MX\",\"@id\":\"https:\\\/\\\/world.dan.org\\\/es\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/world.dan.org\\\/wp-content\\\/uploads\\\/2022\\\/04\\\/DAN-World-logo-sm-52px.svg\",\"contentUrl\":\"https:\\\/\\\/world.dan.org\\\/wp-content\\\/uploads\\\/2022\\\/04\\\/DAN-World-logo-sm-52px.svg\",\"width\":175,\"height\":52,\"caption\":\"DAN World\"},\"image\":{\"@id\":\"https:\\\/\\\/world.dan.org\\\/es\\\/#\\\/schema\\\/logo\\\/image\\\/\"}}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"V\u00e1lvulas de buceo que no coinciden con las salidas de la botella - DAN World en Espa\u00f1ol","description":"UNA INCOMPATIBILIDAD ENTRE V\u00c1LVULAS Y CILINDROS recientemente tuvo consecuencias mortales en Europa. Este problema puede evitarse con una capacitaci\u00f3n formal y espec\u00edfica del uso y una comprensi\u00f3n b\u00e1sica de los tipos de v\u00e1lvula de los tanques de buceo y de rosca de los cilindros.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/world.dan.org\/es\/alert-diver\/article\/mismatched-scuba-valves-to-cylinder-outlets\/","og_locale":"es_MX","og_type":"article","og_title":"Mismatched Scuba Valves to Cylinder Outlets","og_description":"A VALVE-TO-CYLINDER MISMATCH mismatch recently resulted in a deadly outcome in Europe. This issue is preventable with formal, function-specific training and a basic understanding of scuba tank valves and cylinder threads.","og_url":"https:\/\/world.dan.org\/es\/alert-diver\/article\/mismatched-scuba-valves-to-cylinder-outlets\/","og_site_name":"DAN World","article_modified_time":"2023-07-12T17:35:42+00:00","og_image":[{"width":1200,"height":600,"url":"https:\/\/world.dan.org\/wp-content\/uploads\/2023\/06\/64-Risk-Mitigation-Q2_27_RiskMitigation-web.jpg","type":"image\/jpeg"}],"twitter_card":"summary_large_image","twitter_description":"A VALVE-TO-CYLINDER MISMATCH mismatch recently resulted in a deadly outcome in Europe. This issue is preventable with formal, function-specific training and a basic understanding of scuba tank valves and cylinder threads.","twitter_misc":{"Est. reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/world.dan.org\/alert-diver\/article\/mismatched-scuba-valves-to-cylinder-outlets\/","url":"https:\/\/world.dan.org\/alert-diver\/article\/mismatched-scuba-valves-to-cylinder-outlets\/","name":"V\u00e1lvulas de buceo que no coinciden con las salidas de la botella - DAN World en Espa\u00f1ol","isPartOf":{"@id":"https:\/\/world.dan.org\/es\/#website"},"primaryImageOfPage":{"@id":"https:\/\/world.dan.org\/alert-diver\/article\/mismatched-scuba-valves-to-cylinder-outlets\/#primaryimage"},"image":{"@id":"https:\/\/world.dan.org\/alert-diver\/article\/mismatched-scuba-valves-to-cylinder-outlets\/#primaryimage"},"thumbnailUrl":"https:\/\/world.dan.org\/wp-content\/uploads\/2023\/06\/64-Risk-Mitigation-Q2_27_RiskMitigation-web.jpg","datePublished":"2023-06-07T14:27:30+00:00","dateModified":"2023-07-12T17:35:42+00:00","description":"UNA INCOMPATIBILIDAD ENTRE V\u00c1LVULAS Y CILINDROS recientemente tuvo consecuencias mortales en Europa. Este problema puede evitarse con una capacitaci\u00f3n formal y espec\u00edfica del uso y una comprensi\u00f3n b\u00e1sica de los tipos de v\u00e1lvula de los tanques de buceo y de rosca de los cilindros.","breadcrumb":{"@id":"https:\/\/world.dan.org\/alert-diver\/article\/mismatched-scuba-valves-to-cylinder-outlets\/#breadcrumb"},"inLanguage":"es-MX","potentialAction":[{"@type":"ReadAction","target":["https:\/\/world.dan.org\/alert-diver\/article\/mismatched-scuba-valves-to-cylinder-outlets\/"]}]},{"@type":"ImageObject","inLanguage":"es-MX","@id":"https:\/\/world.dan.org\/alert-diver\/article\/mismatched-scuba-valves-to-cylinder-outlets\/#primaryimage","url":"https:\/\/world.dan.org\/wp-content\/uploads\/2023\/06\/64-Risk-Mitigation-Q2_27_RiskMitigation-web.jpg","contentUrl":"https:\/\/world.dan.org\/wp-content\/uploads\/2023\/06\/64-Risk-Mitigation-Q2_27_RiskMitigation-web.jpg","width":1200,"height":600,"caption":"The valve on the left is suitable for 3\/4-inch NPSM cylinder threads. The valve on the right will erroneously thread into a 3\/4-inch NPSM cylinder neck for about three to five threads before it begins to bind."},{"@type":"BreadcrumbList","@id":"https:\/\/world.dan.org\/alert-diver\/article\/mismatched-scuba-valves-to-cylinder-outlets\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/world.dan.org\/"},{"@type":"ListItem","position":2,"name":"Mismatched Scuba Valves to Cylinder Outlets"}]},{"@type":"WebSite","@id":"https:\/\/world.dan.org\/es\/#website","url":"https:\/\/world.dan.org\/es\/","name":"DAN World","description":"","publisher":{"@id":"https:\/\/world.dan.org\/es\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/world.dan.org\/es\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"es-MX"},{"@type":"Organization","@id":"https:\/\/world.dan.org\/es\/#organization","name":"DAN World","url":"https:\/\/world.dan.org\/es\/","logo":{"@type":"ImageObject","inLanguage":"es-MX","@id":"https:\/\/world.dan.org\/es\/#\/schema\/logo\/image\/","url":"https:\/\/world.dan.org\/wp-content\/uploads\/2022\/04\/DAN-World-logo-sm-52px.svg","contentUrl":"https:\/\/world.dan.org\/wp-content\/uploads\/2022\/04\/DAN-World-logo-sm-52px.svg","width":175,"height":52,"caption":"DAN World"},"image":{"@id":"https:\/\/world.dan.org\/es\/#\/schema\/logo\/image\/"}}]}},"_links":{"self":[{"href":"https:\/\/world.dan.org\/es\/wp-json\/wp\/v2\/dan_alert_diver\/24560","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/world.dan.org\/es\/wp-json\/wp\/v2\/dan_alert_diver"}],"about":[{"href":"https:\/\/world.dan.org\/es\/wp-json\/wp\/v2\/types\/dan_alert_diver"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/world.dan.org\/es\/wp-json\/wp\/v2\/media\/24562"}],"wp:attachment":[{"href":"https:\/\/world.dan.org\/es\/wp-json\/wp\/v2\/media?parent=24560"}],"wp:term":[{"taxonomy":"dan_alert_diver_categories","embeddable":true,"href":"https:\/\/world.dan.org\/es\/wp-json\/wp\/v2\/dan_alert_diver_categories?post=24560"},{"taxonomy":"dan_alert_diver_issues","embeddable":true,"href":"https:\/\/world.dan.org\/es\/wp-json\/wp\/v2\/dan_alert_diver_issues?post=24560"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}