{"id":25377,"date":"2026-10-29T15:41:57","date_gmt":"2026-10-29T20:41:57","guid":{"rendered":"https:\/\/www.elliott-tool.com\/como-abordar-los-orificios-sobredimensionados-de-la-placa-tubular-durante-el-mantenimiento-de-calderas\/"},"modified":"2026-10-29T15:41:57","modified_gmt":"2026-10-29T20:41:57","slug":"como-abordar-los-orificios-sobredimensionados-de-la-placa-tubular-durante-el-mantenimiento-de-calderas","status":"publish","type":"post","link":"https:\/\/www.elliott-tool.com\/es\/como-abordar-los-orificios-sobredimensionados-de-la-placa-tubular-durante-el-mantenimiento-de-calderas\/","title":{"rendered":"C\u00f3mo abordar los orificios sobredimensionados de la placa tubular durante el mantenimiento de calderas"},"content":{"rendered":"<p><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container has-pattern-background has-mask-background nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-padding-right:5%;--awb-padding-left:5%;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start\" style=\"max-width:1976px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-title title fusion-title-1 fusion-sep-none fusion-title-center fusion-title-text fusion-title-size-one\" style=\"--awb-text-color:#bf000d;\"><h1 class=\"title-heading-center fusion-responsive-typography-calculated\" style=\"margin:0;text-transform:none;--fontSize:38;line-height:1.4;\">C\u00f3mo abordar orificios sobredimensionados en placas tubulares<\/h1><\/div><div class=\"fusion-title title fusion-title-2 fusion-sep-none fusion-title-center fusion-title-text fusion-title-size-four\"><h4 class=\"title-heading-center fusion-responsive-typography-calculated\" style=\"margin:0;text-transform:none;--fontSize:22;--minFontSize:22;line-height:1.5;\">Usted retira los tubos viejos, coloca los nuevos y se dispone a expandirlos. Nada funciona y no logra una uni\u00f3n mec\u00e1nica entre el tubo y su orificio. Cuando eso sucede durante <a href=\"https:\/\/www.elliott-tool.com\/retubing-tools-you-must-own-in-your-supplies\/\">el retubado de una caldera<\/a>, puede deberse a que los orificios de la placa tubular est\u00e1n sobredimensionados.<\/h4><\/div><div class=\"fusion-image-element \" style=\"--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-1 hover-type-none\" class=\"image-magnify\" class=\"image-scroll\"><img decoding=\"async\" width=\"2560\" height=\"1440\" alt=\"Tube gauge measuring size of tube hole\" title=\"Tube Gauge-Header\" src=\"https:\/\/www.elliott-tool.com\/wp-content\/uploads\/2026\/10\/Tube-Gauge-Header-scaled.jpg\" data-orig-src=\"https:\/\/www.elliott-tool.com\/wp-content\/uploads\/2026\/10\/Tube-Gauge-Header-scaled.jpg\" class=\"lazyload img-responsive wp-image-25354\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%272560%27%20height%3D%271440%27%20viewBox%3D%270%200%202560%201440%27%3E%3Crect%20width%3D%272560%27%20height%3D%271440%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.elliott-tool.com\/wp-content\/uploads\/2026\/10\/Tube-Gauge-Header-200x113.jpg 200w, https:\/\/www.elliott-tool.com\/wp-content\/uploads\/2026\/10\/Tube-Gauge-Header-400x225.jpg 400w, https:\/\/www.elliott-tool.com\/wp-content\/uploads\/2026\/10\/Tube-Gauge-Header-600x338.jpg 600w, https:\/\/www.elliott-tool.com\/wp-content\/uploads\/2026\/10\/Tube-Gauge-Header-800x450.jpg 800w, https:\/\/www.elliott-tool.com\/wp-content\/uploads\/2026\/10\/Tube-Gauge-Header-1200x675.jpg 1200w, https:\/\/www.elliott-tool.com\/wp-content\/uploads\/2026\/10\/Tube-Gauge-Header-scaled.jpg 2560w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 1024px) 100vw, (max-width: 640px) 100vw, 2560px\" \/><\/span><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-1 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-padding-top:29px;--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-title title fusion-title-3 fusion-sep-none fusion-title-text fusion-title-size-three\" style=\"--awb-text-color:#bf000d;--awb-font-size:26px;\"><h3 class=\"title-heading-left fusion-responsive-typography-calculated\" style=\"margin:0;font-size:1em;--fontSize:26;line-height:1.5;\">\u00bfQu\u00e9 tama\u00f1o debe tener un orificio en la placa tubular?<\/h3><\/div><div class=\"fusion-text fusion-text-1\"><p>En la construcci\u00f3n de calderas nuevas, los orificios para tubos suelen fabricarse 1\/32\u201d o 0.030\u201d m\u00e1s grandes que el di\u00e1metro exterior de los tubos, en el caso de tubos de caldera de tama\u00f1o promedio, de alrededor de 2\u201d. Las tablas de<a href=\"http:\/\/tema.org\"> TEMA<\/a> muestran distintos tama\u00f1os de los orificios para tubos seg\u00fan el di\u00e1metro exterior del tubo y tambi\u00e9n ofrecen una opci\u00f3n de ajuste estrecho para determinadas aplicaciones.<\/p>\n<\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-2 fusion-flex-container has-pattern-background has-mask-background nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-padding-right:5%;--awb-padding-bottom:44px;--awb-padding-left:5%;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start\" style=\"max-width:1976px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-2 fusion_builder_column_1_2 1_2 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:50%;--awb-margin-top-large:0px;--awb-spacing-right-large:3.84%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:3.84%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-title title fusion-title-4 fusion-sep-none fusion-title-text fusion-title-size-four\"><h4 class=\"title-heading-left fusion-responsive-typography-calculated\" style=\"margin:0;text-transform:none;--fontSize:22;--minFontSize:22;line-height:1.5;\">Por qu\u00e9 los orificios de la placa tubular aumentan de tama\u00f1o con el tiempo<\/h4><\/div><div class=\"fusion-text fusion-text-2\"><p style=\"font-weight: 400;\">Los orificios para tubos pueden agrandarse de forma natural debido al calentamiento y enfriamiento, pero tambi\u00e9n durante el retubado del recipiente. Cada vez que se expande un tubo dentro de un orificio, el tubo ejerce suficiente presi\u00f3n para agrandar el orificio, y confiamos en que el l\u00edmite el\u00e1stico de los ligamentos entre los orificios mantenga esa posici\u00f3n. Todo se desgasta con el tiempo y, cuanto m\u00e1s se retuba un recipiente, menor es el l\u00edmite el\u00e1stico que conserva.<\/p>\n<p style=\"font-weight: 400;\">Poner en marcha una caldera con agua fr\u00eda es un ejemplo. Encontrar\u00e1 esto en centrales el\u00e9ctricas que suministran electricidad a otro estado o sistema de red. Esas calderas sufren muchos choques t\u00e9rmicos, y cada choque flexiona los orificios de la placa tubular. Esto lo hemos visto tanto en calderas acuotubulares como pirotubulares.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-3 fusion_builder_column_1_2 1_2 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:50%;--awb-margin-top-large:0px;--awb-spacing-right-large:3.84%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:3.84%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-title title fusion-title-5 fusion-sep-none fusion-title-text fusion-title-size-four\"><h4 class=\"title-heading-left fusion-responsive-typography-calculated\" style=\"margin:0;text-transform:none;--fontSize:22;--minFontSize:22;line-height:1.5;\">C\u00f3mo afectan los orificios sobredimensionados de la placa tubular a la uni\u00f3n expandida<\/h4><\/div><div class=\"fusion-text fusion-text-3\"><p style=\"font-weight: 400;\">A medida que el orificio del tubo se agranda, en alg\u00fan momento el tubo asignado perder\u00e1 integridad estructural y no podr\u00e1 mantener la uni\u00f3n mec\u00e1nica porque se habr\u00e1 superado el l\u00edmite el\u00e1stico nominal. Esto tambi\u00e9n podr\u00eda provocar la fractura del tubo al superar la resistencia a la tracci\u00f3n nominal.<\/p>\n<p style=\"font-weight: 400;\">A menudo, los clientes no detectan el problema de inmediato. Sacan los tubos viejos, instalan tubos nuevos y solo se dan cuenta cuando van a expandirlos.<\/p>\n<\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-3 fusion-flex-container has-pattern-background has-mask-background nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-padding-right:5%;--awb-padding-left:5%;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start\" style=\"max-width:1976px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-4 fusion_builder_column_1_2 1_2 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:50%;--awb-margin-top-large:0px;--awb-spacing-right-large:3.84%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:3.84%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-title title fusion-title-6 fusion-sep-none fusion-title-text fusion-title-size-three\" style=\"--awb-text-color:#bf000d;--awb-font-size:26px;\"><h3 class=\"title-heading-left fusion-responsive-typography-calculated\" style=\"margin:0;font-size:1em;--fontSize:26;line-height:1.5;\">Mida el orificio antes de expandir el tubo<\/h3><\/div><div class=\"fusion-text fusion-text-4\"><p><a href=\"https:\/\/www.elliott-tool.com\/es\/no-pase-por-alto-la-importancia-de-un-calibrador\/\">Medir el orificio permitir\u00e1<\/a> detectar r\u00e1pidamente el problema. Por ejemplo, para un tubo de 2 pulgadas, un orificio 0.030\u201d m\u00e1s grande deber\u00eda medir 2.030\u201d. Entonces, \u00bfqu\u00e9 ocurre si el orificio mide 2.075\u201d?<\/p>\n<\/div><div class=\"fusion-title title fusion-title-7 fusion-sep-none fusion-title-text fusion-title-size-four\"><h4 class=\"title-heading-left fusion-responsive-typography-calculated\" style=\"margin:0;text-transform:none;--fontSize:22;--minFontSize:22;line-height:1.5;\">Qui\u00e9n decide c\u00f3mo manejar un orificio sobredimensionado<\/h4><\/div><div class=\"fusion-text fusion-text-5\"><p>Antes de expandir el tubo y confiar en que todo salga bien, levante la mano y llame al personal de <a href=\"https:\/\/www.nationalboard.org\/PrintPage.aspx?pageID=392\">Control de Calidad (QC)<\/a> o al Inspector Autorizado (AI). La decisi\u00f3n de c\u00f3mo abordar un orificio sobredimensionado les corresponde a ellos.<\/p>\n<\/div><div class=\"fusion-title title fusion-title-8 fusion-sep-none fusion-title-text fusion-title-size-four\"><h4 class=\"title-heading-left fusion-responsive-typography-calculated\" style=\"margin:0;text-transform:none;--fontSize:22;--minFontSize:22;line-height:1.5;\">Respuestas en campo ante orificios sobredimensionados en placas tubulares<\/h4><\/div><div class=\"fusion-text fusion-text-6\"><p style=\"font-weight: 400;\">En campo, hemos visto que las cuadrillas abordan los orificios sobredimensionados de varias maneras. No recomendar\u00edamos estas pr\u00e1cticas, pero s\u00ed se llevan a cabo:<br \/>\n\u2022 Expandir el tubo lo m\u00e1ximo posible, llevar la herramienta hasta su tope y aplicar un cord\u00f3n de soldadura alrededor del tubo<br \/>\n\u2022 Encamisar el tubo o a\u00f1adirle una f\u00e9rula. El encamisado es la opci\u00f3n m\u00e1s extrema, y las f\u00e9rulas son m\u00e1s habituales.<br \/>\n\u2022 Taponar y soldar el tubo para dejarlo completamente fuera de servicio<br \/>\nLa decisi\u00f3n sobre qu\u00e9 procedimiento seguir corresponde a QC o al Inspector Autorizado.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-5 fusion_builder_column_1_2 1_2 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:50%;--awb-margin-top-large:0px;--awb-spacing-right-large:3.84%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:3.84%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-image-element \" style=\"--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-2 hover-type-none\" class=\"image-magnify\" class=\"image-scroll\"><img decoding=\"async\" width=\"2560\" height=\"1707\" title=\"Open Scotch Marine Fire Tube Steam Boiler with Burner\" src=\"https:\/\/www.elliott-tool.com\/wp-content\/uploads\/2025\/10\/Boiler-Tube-Sheet_AdobeStock_421652443-Desaturated-scaled.jpg\" data-orig-src=\"https:\/\/www.elliott-tool.com\/wp-content\/uploads\/2025\/10\/Boiler-Tube-Sheet_AdobeStock_421652443-Desaturated-scaled.jpg\" alt class=\"lazyload img-responsive wp-image-24126\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%272560%27%20height%3D%271707%27%20viewBox%3D%270%200%202560%201707%27%3E%3Crect%20width%3D%272560%27%20height%3D%271707%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.elliott-tool.com\/wp-content\/uploads\/2025\/10\/Boiler-Tube-Sheet_AdobeStock_421652443-Desaturated-200x133.jpg 200w, https:\/\/www.elliott-tool.com\/wp-content\/uploads\/2025\/10\/Boiler-Tube-Sheet_AdobeStock_421652443-Desaturated-400x267.jpg 400w, https:\/\/www.elliott-tool.com\/wp-content\/uploads\/2025\/10\/Boiler-Tube-Sheet_AdobeStock_421652443-Desaturated-600x400.jpg 600w, https:\/\/www.elliott-tool.com\/wp-content\/uploads\/2025\/10\/Boiler-Tube-Sheet_AdobeStock_421652443-Desaturated-800x533.jpg 800w, https:\/\/www.elliott-tool.com\/wp-content\/uploads\/2025\/10\/Boiler-Tube-Sheet_AdobeStock_421652443-Desaturated-1200x800.jpg 1200w, https:\/\/www.elliott-tool.com\/wp-content\/uploads\/2025\/10\/Boiler-Tube-Sheet_AdobeStock_421652443-Desaturated-scaled.jpg 2560w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 1024px) 100vw, (max-width: 640px) 100vw, 1200px\" \/><\/span><\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-4 fusion-flex-container has-pattern-background has-mask-background nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-padding-right:5%;--awb-padding-left:5%;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start\" style=\"max-width:1976px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-6 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-title title fusion-title-9 fusion-sep-none fusion-title-text fusion-title-size-three\" style=\"--awb-text-color:#bf000d;--awb-font-size:26px;\"><h3 class=\"title-heading-left fusion-responsive-typography-calculated\" style=\"margin:0;font-size:1em;--fontSize:26;line-height:1.5;\">Los orificios sobredimensionados pueden ser irregulares<\/h3><\/div><div class=\"fusion-text fusion-text-7\"><p style=\"font-weight: 400;\">Es posible que los orificios sobredimensionados no est\u00e9n presentes en toda la placa tubular. Pueden variar mucho de un orificio al siguiente. Aun as\u00ed, si encuentra uno, espere encontrar m\u00e1s, as\u00ed que haga un recuento de los orificios afectados.<br \/>\nCuando los tubos nuevos no se expandan como deber\u00edan, mida primero el orificio. Si est\u00e1 sobredimensionado, solicite la intervenci\u00f3n de Control de Calidad o del Inspector Autorizado antes de continuar.<\/p>\n<\/div><\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Los orificios sobredimensionados de la placa tubular pueden impedir que los tubos nuevos se expandan correctamente durante el retubado de una caldera. Aprenda a medir el orificio y qui\u00e9n decide qu\u00e9 sucede despu\u00e9s.<\/p>\n","protected":false},"author":21,"featured_media":25366,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"content-type":"","footnotes":""},"categories":[57],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>C\u00f3mo abordar los orificios sobredimensionados de la placa tubular durante el mantenimiento de calderas - Elliott Tool Technologies<\/title>\n<meta name=\"description\" content=\"Los orificios sobredimensionados de la placa tubular pueden impedir que los tubos nuevos se expandan correctamente durante el retubado de una caldera. 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