{"id":6024,"date":"2026-10-02T02:04:43","date_gmt":"2026-10-01T18:04:43","guid":{"rendered":"https:\/\/www.sj-gauge.com\/?p=6024"},"modified":"2026-10-02T05:53:14","modified_gmt":"2026-10-01T21:53:14","slug":"pressure-gauge-thread-connection-leak","status":"publish","type":"post","link":"https:\/\/www.sj-gauge.com\/es\/pressure-gauge-thread-connection-leak\/","title":{"rendered":"\u00bfEl man\u00f3metro gotea despu\u00e9s de la instalaci\u00f3n? 5 comprobaciones de conexi\u00f3n"},"content":{"rendered":"<p>Un man\u00f3metro que gotea gas o l\u00edquido despu\u00e9s de la instalaci\u00f3n no necesariamente tiene un elemento de medici\u00f3n defectuoso. Roscas incompatibles, un m\u00e9todo de sellado incorrecto, una junta da\u00f1ada o un apriete inadecuado pueden causar fugas en la conexi\u00f3n del proceso. A\u00f1adir m\u00e1s cinta de sellado o apretar con m\u00e1s fuerza puede ocultar el problema sin solucionarlo.<\/p>\n\n\n\n<p>Antes de tocar o aflojar una conexi\u00f3n, detenga la presurizaci\u00f3n, a\u00edsle la fuente de presi\u00f3n y siga el procedimiento del equipo para una despresurizaci\u00f3n, drenaje y enfriamiento seguros. No apriete una conexi\u00f3n con fugas bajo presi\u00f3n. Cerrar una v\u00e1lvula de aislamiento puede dejar presi\u00f3n atrapada en el man\u00f3metro; una lectura de cero en el dial por s\u00ed sola no garantiza que la conexi\u00f3n se pueda abrir de forma segura.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter\" style=\"width:640px;max-width:100%;margin:32px auto\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1448\" height=\"1086\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/pressure-gauge-valve-connection-field.png\" alt=\"Pressure gauge and valve manifold connections on an industrial installation\" class=\"wp-image-6022\" sizes=\"(max-width: 640px) 100vw, 640px\" loading=\"eager\" style=\"display:block;width:100%;height:auto;aspect-ratio:3\/2;object-fit:cover;object-position:center 80%\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/pressure-gauge-valve-connection-field.png 1448w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/pressure-gauge-valve-connection-field-300x225.png 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/pressure-gauge-valve-connection-field-1024x768.png 1024w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/pressure-gauge-valve-connection-field-768x576.png 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/pressure-gauge-valve-connection-field-16x12.png 16w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/pressure-gauge-valve-connection-field-600x450.png 600w\" \/><figcaption class=\"wp-element-caption\" style=\"text-align:center\">Figura 1 | Instalaci\u00f3n en campo que muestra la conexi\u00f3n del man\u00f3metro y las juntas de las v\u00e1lvulas adyacentes. La fotograf\u00eda ilustra la disposici\u00f3n, no una fuga confirmada.<\/figcaption><\/figure>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_88 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u00cdndice<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Alternar tabla de contenidos\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Mostrar u ocultar<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #7b1e1c;color:#7b1e1c\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #7b1e1c;color:#7b1e1c\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.sj-gauge.com\/es\/pressure-gauge-thread-connection-leak\/#1-confirm-that-the-thread-standards-match\" >1. Confirme que los est\u00e1ndares de la rosca coinciden.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.sj-gauge.com\/es\/pressure-gauge-thread-connection-leak\/#2-identify-where-the-connection-should-seal\" >2. Identificar d\u00f3nde debe sellarse la conexi\u00f3n.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.sj-gauge.com\/es\/pressure-gauge-thread-connection-leak\/#3-inspect-the-gasket-and-sealing-faces\" >3. Inspeccione la junta y las superficies de sellado.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.sj-gauge.com\/es\/pressure-gauge-thread-connection-leak\/#4-check-the-tape-or-thread-sealant\" >4. Compruebe la cinta o el sellador de roscas.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.sj-gauge.com\/es\/pressure-gauge-thread-connection-leak\/#5-check-tightening-and-recommissioning\" >5. Compruebe el apriete y recommissioning<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.sj-gauge.com\/es\/pressure-gauge-thread-connection-leak\/#international-standards-to-check\" >Normas internacionales para verificar<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.sj-gauge.com\/es\/pressure-gauge-thread-connection-leak\/#frequently-asked-questions\" >Preguntas frecuentes<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.sj-gauge.com\/es\/pressure-gauge-thread-connection-leak\/#correct-the-cause-before-returning-to-service\" >Corrija la causa antes de volver a ponerlo en servicio.<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\" id=\"check-thread-standard\"><span class=\"ez-toc-section\" id=\"1-confirm-that-the-thread-standards-match\"><\/span>1. Confirme que los est\u00e1ndares de la rosca coinciden.<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Verifique las especificaciones completas de conexi\u00f3n tanto en el man\u00f3metro como en el racor correspondiente: est\u00e1ndar de rosca, tama\u00f1o nominal y forma (macho o hembra). Las roscas NPT, R\/Rc\/Rp y G\/BSPP no son intercambiables aunque su tama\u00f1o nominal en pulgadas parezca igual. Unas pocas vueltas de apriete no garantizan una uni\u00f3n compatible ni estanca.<\/p>\n\n\n\n<p>Busque roscas cruzadas, crestas de rosca aplanadas y otros da\u00f1os despu\u00e9s de que el sistema se haya vuelto seguro. Reemplace los componentes da\u00f1ados en lugar de intentar rellenar los defectos con cinta adicional. Para un instrumento de reemplazo como el <a href=\"https:\/\/www.sj-gauge.com\/es\/product\/prss\/\">Man\u00f3metro de presi\u00f3n de acero inoxidable PRSS<\/a>, confirme la opci\u00f3n de conexi\u00f3n solicitada compar\u00e1ndola con el accesorio existente en lugar de seleccionarla \u00fanicamente por el tama\u00f1o del dial.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"check-sealing-location\"><span class=\"ez-toc-section\" id=\"2-identify-where-the-connection-should-seal\"><\/span>2. Identificar d\u00f3nde debe sellarse la conexi\u00f3n.<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Las conexiones c\u00f3nicas NPT normalmente utilizan un sellador o cinta de roscas adecuado, seg\u00fan las especificaciones del fabricante. Las conexiones ISO 7-1 utilizan roscas c\u00f3nicas externas R con roscas c\u00f3nicas internas Rc o roscas paralelas internas Rp, con estanqueidad a presi\u00f3n en las roscas. Utilice la combinaci\u00f3n de acoplamiento y el material de sellado especificados.<\/p>\n\n\n\n<p>Las roscas paralelas G\/BSPP, seg\u00fan la norma ISO 228-1, no proporcionan el sellado a presi\u00f3n en las roscas. El sellado se forma en otro lugar, por ejemplo, mediante una junta, una junta t\u00f3rica o una superficie de sellado integrada en la conexi\u00f3n. Envolver las roscas G con cinta no sustituye la falta de un sellado en el extremo. En particular, tanto Rp como G son roscas internas paralelas, pero sus sistemas de sellado no deben considerarse id\u00e9nticos.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"check-gasket-face\"><span class=\"ez-toc-section\" id=\"3-inspect-the-gasket-and-sealing-faces\"><\/span>3. Inspeccione la junta y las superficies de sellado.<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Para conexiones que sellan con una junta o anillo t\u00f3rico, verifique que la junta est\u00e9 presente, tenga el tama\u00f1o correcto y est\u00e9 colocada seg\u00fan lo previsto. Una junta faltante, aplanada, endurecida o da\u00f1ada puede provocar fugas incluso cuando la rosca parezca estar completamente apretada. La suciedad, las rebabas y los ara\u00f1azos en las superficies de sellado tambi\u00e9n pueden impedir un contacto adecuado.<\/p>\n\n\n\n<p>Seleccione el material de la junta adecuado para el fluido de proceso, la presi\u00f3n y la temperatura, y sustit\u00fayala seg\u00fan las instrucciones de mantenimiento. No apile juntas adicionales ni reutilice una junta visiblemente da\u00f1ada para compensar una conexi\u00f3n inadecuada.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter\" style=\"width:640px;max-width:100%;margin:32px auto\"><img loading=\"lazy\" decoding=\"async\" width=\"1108\" height=\"1477\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/sj-pressure-gauge-connection-field-detail.jpg\" alt=\"Rear pressure gauge connections and hexagonal fittings on a valve assembly\" class=\"wp-image-6023\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" style=\"display:block;width:100%;height:auto;aspect-ratio:3\/2;object-fit:cover;object-position:center 85%\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/sj-pressure-gauge-connection-field-detail.jpg 1108w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/sj-pressure-gauge-connection-field-detail-225x300.jpg 225w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/sj-pressure-gauge-connection-field-detail-768x1024.jpg 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/sj-pressure-gauge-connection-field-detail-9x12.jpg 9w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/sj-pressure-gauge-connection-field-detail-300x400.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/10\/sj-pressure-gauge-connection-field-detail-600x800.jpg 600w\" \/><figcaption class=\"wp-element-caption\" style=\"text-align:center\">Figura 2 | Detalle de conexi\u00f3n de una instalaci\u00f3n real. Confirme el dise\u00f1o real de la rosca y el sello antes de seleccionar los sellos o aplicar la fuerza de apriete.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"check-sealing-material\"><span class=\"ez-toc-section\" id=\"4-check-the-tape-or-thread-sealant\"><\/span>4. Compruebe la cinta o el sellador de roscas.<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Cuando se requiera sellado de roscas, siga las instrucciones de aplicaci\u00f3n del fabricante del racor y del sellador. Una direcci\u00f3n de envoltura incorrecta o una cantidad insuficiente de material pueden provocar fugas; un exceso de material puede interferir con el acoplamiento o entrar en el puerto de presi\u00f3n. No existe un grosor de cinta ni un n\u00famero de vueltas que se adapte a todas las roscas y condiciones de servicio.<\/p>\n\n\n\n<p>No d\u00e9 por sentado que los selladores de fontaner\u00eda comunes son adecuados para el ox\u00edgeno, el procesamiento de alimentos o el uso de productos qu\u00edmicos. Verifique la compatibilidad con los fluidos, la limpieza y las homologaciones requeridas, as\u00ed como los l\u00edmites de temperatura y presi\u00f3n. Retire los restos de sellador antiguos durante el mantenimiento autorizado, evitando que entren residuos en el instrumento.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"check-tightening\"><span class=\"ez-toc-section\" id=\"5-check-tightening-and-recommissioning\"><\/span>5. Compruebe el apriete y recommissioning<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Utilice las caras planas designadas para la llave en la conexi\u00f3n de proceso; no gire la carcasa del man\u00f3metro como si fuera una palanca. Un apriete insuficiente puede dejar la junta sin sellar, mientras que una fuerza excesiva puede da\u00f1ar las roscas, los sellos o el casquillo. Utilice el par de apriete o el procedimiento de montaje especificados por el fabricante para los materiales y el dise\u00f1o de la conexi\u00f3n.<\/p>\n\n\n\n<p>Despu\u00e9s de corregir la falla, realice la prueba de fugas aprobada del equipo y el procedimiento controlado de retorno al servicio. Si la fuga se repite, detenga y vuelva a evaluar la conexi\u00f3n en lugar de agregar torque repetidamente. Cuando se necesite aislamiento de mantenimiento, revise un accesorio adecuado como el <a href=\"https:\/\/www.sj-gauge.com\/es\/product\/pra-bv\/\">Grifo del man\u00f3metro PRA-BV<\/a>; sus l\u00edmites de conexi\u00f3n y servicio deben coincidir con los del sistema, y el aislamiento a\u00fan no elimina la presi\u00f3n atrapada.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"thread-standards\"><span class=\"ez-toc-section\" id=\"international-standards-to-check\"><\/span>Normas internacionales para verificar<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.asme.org\/codes-standards\/find-codes-standards\/b1201-pipe-threads-general-purpose-inch\">ASME B1.20.1-2013 (R2018)<\/a>Dimensiones y medidas para roscas de tuber\u00eda en pulgadas de uso general, incluyendo NPT. \u00datil para comprobar la forma y el tama\u00f1o de la rosca especificada.<\/li>\n\n\n\n<li><a href=\"https:\/\/www.iso.org\/standard\/20819.html\">ISO 7-1:1994<\/a>, con Cor.1:2007: roscas de tuber\u00eda para uniones hechas estancas a presi\u00f3n en las roscas, incluido el sistema R, Rc y Rp.<\/li>\n\n\n\n<li><a href=\"https:\/\/www.iso.org\/standard\/33777.html\">ISO 228-1:2000<\/a>: roscas de tuber\u00eda donde no se realizan juntas estancas a presi\u00f3n en las roscas. Para conexiones G, verifique el sistema de sellado independiente.<\/li>\n<\/ul>\n\n\n\n<p>Estas referencias ayudan a identificar el sistema de conexi\u00f3n; citarlas no certifica el producto ni reemplaza las instrucciones de instalaci\u00f3n y prueba de fugas del fabricante del equipo. Confirme la edici\u00f3n y los requisitos aplicables con las especificaciones del proyecto.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"connection-leak-faq\"><span class=\"ez-toc-section\" id=\"frequently-asked-questions\"><\/span>Preguntas frecuentes<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u00bfPuedo detener la fuga apretando media vuelta m\u00e1s?<\/h3>\n\n\n\n<p>No apriete bajo presi\u00f3n. Primero, aseg\u00farese de que el sistema sea seguro y, a continuaci\u00f3n, compruebe la compatibilidad de la rosca, el m\u00e9todo de sellado y el estado de los componentes. Aplicar fuerza adicional puede da\u00f1ar la conexi\u00f3n; cualquier apriete posterior debe realizarse siguiendo las instrucciones del fabricante.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u00bfSe puede reutilizar la junta vieja?<\/h3>\n\n\n\n<p>Siga las instrucciones de mantenimiento del fabricante del sello. No reutilice directamente una junta que est\u00e9 permanentemente comprimida, endurecida, agrietada o rayada. El repuesto debe tener las dimensiones y el material correctos, no solo una apariencia similar.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u00bfLa presencia de aceite visible siempre significa que hay una fuga en la conexi\u00f3n del proceso?<\/h3>\n\n\n\n<p>No siempre. En un man\u00f3metro lleno de l\u00edquido, este puede provenir del llenado de la carcasa, mientras que el fluido de proceso puede escaparse por una conexi\u00f3n o por otra pieza da\u00f1ada. Es fundamental identificar la fuente de la fuga de forma segura antes de realizar la reparaci\u00f3n; la sola presencia del l\u00edquido no indica la causa del problema.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"connection-leak-conclusion\"><span class=\"ez-toc-section\" id=\"correct-the-cause-before-returning-to-service\"><\/span>Corrija la causa antes de volver a ponerlo en servicio.<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Para detectar una fuga en la conexi\u00f3n de un man\u00f3metro, realice cinco comprobaciones: coincidencia de roscas, ubicaci\u00f3n del sellado, estado de la junta, material de sellado y apriete. Registre el modelo del man\u00f3metro, las especificaciones de la conexi\u00f3n, el fluido, la presi\u00f3n, la temperatura y fotograf\u00edas claras de la conexi\u00f3n antes de solicitar asistencia t\u00e9cnica o de mantenimiento.<\/p>\n\n\n\n<p><a href=\"https:\/\/www.sj-gauge.com\/es\/contact\/\">Analice la selecci\u00f3n del calibre y la conexi\u00f3n.<\/a><\/p>\n\n\n\n<p>Lectura relacionada: <a href=\"https:\/\/www.sj-gauge.com\/es\/pressure-gauge-npt-pt-g-thread\/\">Roscas NPT, PT y G en man\u00f3metros: diferencias y m\u00e9todos de sellado<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>A pressure gauge leaking gas or liquid after installation does not necessarily have a faulty measuring element. Incompatible threads, an incorrect sealing method, a damaged gasket or improper tightening can all cause leakage at the process connection. Adding more sealing tape or tightening harder may hide the problem without correcting it. Before touching or loosening [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":6022,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[61],"tags":[71],"class_list":["post-6024","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge","tag-pressure"],"blocksy_meta":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.7 (Yoast SEO v28.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Pressure Gauge Connection Leaks: 5 Checks | SJ Gauge<\/title>\n<meta name=\"description\" content=\"Pressure gauge leaking after installation? 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