{"id":6951,"date":"2026-09-01T09:05:44","date_gmt":"2026-09-01T01:05:44","guid":{"rendered":"https:\/\/www.onerovalve.com\/?p=6951"},"modified":"2026-09-02T09:12:45","modified_gmt":"2026-09-02T01:12:45","slug":"carbon-steel-ball-valve-wcb-pressure-temp-limits","status":"publish","type":"post","link":"https:\/\/www.onerovalve.com\/es\/blog\/temperature\/carbon-steel-ball-valve-wcb-pressure-temp-limits\/","title":{"rendered":"V\u00e1lvula de bola de acero al carbono (WCB): L\u00edmites de presi\u00f3n\/temperatura"},"content":{"rendered":"<h2 class=\"wp-block-heading\"><strong>Respuesta r\u00e1pida<\/strong>\uff1a<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">WCB es el grado m\u00e1s com\u00fanmente especificado de <a href=\"https:\/\/www.onerovalve.com\/es\/blog\/process\/cast-steel-industrial-ball-valves\/\" target=\"_blank\" rel=\"noreferrer noopener\">acero al carbono fundido<\/a> Se utiliza en v\u00e1lvulas de bola industriales, que abarcan la gran mayor\u00eda de las aplicaciones de petr\u00f3leo\/gas, vapor, energ\u00eda y uso general en un rango de temperatura de -29 \u00b0C a 425 \u00b0C. Este grado puede soportar presiones de 150 LB a 2500 LB seg\u00fan ASME B16.34 y constituye una alternativa econ\u00f3mica a los aceros aleados en cualquier aplicaci\u00f3n que cumpla con dichas especificaciones. ONERO fabrica v\u00e1lvulas de bola WCB en su planta de fundici\u00f3n con una capacidad de 3000 toneladas, equipada con una prueba hidrost\u00e1tica en cada v\u00e1lvula, API 6D, API 607, ISO 15848, en tama\u00f1os que van desde \u00bd\u201d hasta 48\u201d.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/09\/Carbon-steel-WCB-ball-valve-for-pressure-temperature-applications-1.png\" alt=\"V\u00e1lvula de bola WCB de acero al carbono con l\u00edmites de presi\u00f3n y temperatura.\" class=\"wp-image-6963\" style=\"aspect-ratio:1.7777777777777777\" title=\"L\u00edmites de presi\u00f3n y temperatura de la v\u00e1lvula de bola WCB de acero al carbono\" srcset=\"https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/09\/Carbon-steel-WCB-ball-valve-for-pressure-temperature-applications-1.png 1200w, https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/09\/Carbon-steel-WCB-ball-valve-for-pressure-temperature-applications-1-500x281.png 500w, https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/09\/Carbon-steel-WCB-ball-valve-for-pressure-temperature-applications-1-300x169.png 300w, https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/09\/Carbon-steel-WCB-ball-valve-for-pressure-temperature-applications-1-768x432.png 768w, https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/09\/Carbon-steel-WCB-ball-valve-for-pressure-temperature-applications-1-18x10.png 18w, https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/09\/Carbon-steel-WCB-ball-valve-for-pressure-temperature-applications-1-133x75.png 133w, https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/09\/Carbon-steel-WCB-ball-valve-for-pressure-temperature-applications-1-480x270.png 480w, https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/09\/Carbon-steel-WCB-ball-valve-for-pressure-temperature-applications-1-800x450.png 800w\" sizes=\"auto, (max-width:767px) 480px, (max-width:1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u00bfQu\u00e9 es el WCB (acero al carbono fundido ASTM A216)?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">ASTM A216 es la norma ASME para acero al carbono fundido apto para aplicaciones de alta temperatura. WCB (Weldable Cast B), que significa Cuerpo Fundido Soldable, es el grado m\u00e1s com\u00fan entre los tres tipos de ASTM A216. Los otros dos tipos son WCA y WCC, que representan grados de menor y mayor resistencia, respectivamente.<br>La resistencia a la tracci\u00f3n m\u00ednima del cuerpo de v\u00e1lvula WCB ASTM A216 es de 485 MPa, y el l\u00edmite el\u00e1stico m\u00ednimo es de 250 MPa. El acero al carbono WCB tiene un contenido m\u00e1ximo de carbono de 0,30%, silicio de 0,60% y manganeso de 1,00%. Esto contribuye a lograr una soldabilidad suficiente sin necesidad de tratamiento t\u00e9rmico posterior a la soldadura en la mayor\u00eda de los casos.<br>El <strong>Cuerpo de v\u00e1lvula de bola WCB de acero al carbono<\/strong> Se fabrica mediante el proceso de fundici\u00f3n en arena, que permite una fundici\u00f3n compleja para cuerpos de v\u00e1lvulas m\u00e1s grandes que no se pueden forjar de forma econ\u00f3mica.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Tabla de clasificaci\u00f3n de presi\u00f3n-temperatura ASME B16.34<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.onerovalve.com\/es\/blog\/standards\/5-asme-standards-for-industrial-ball-valves\/\" target=\"_blank\" rel=\"noreferrer noopener\">Normativa ASME B16.34<\/a> La norma establece las clasificaciones de presi\u00f3n-temperatura de las v\u00e1lvulas fabricadas con materiales del grupo 1.1, que incluye el A216 WCB. Las clasificaciones de presi\u00f3n-temperatura para las v\u00e1lvulas de bola WCB disminuyen con el aumento de la temperatura.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Clase de presi\u00f3n<\/strong><\/th><th><strong>Clasificaci\u00f3n a 38 \u00b0C (100 \u00b0F)<\/strong><\/th><th><strong>Clasificaci\u00f3n a 260 \u00b0C (500 \u00b0F)<\/strong><\/th><th><strong>Clasificaci\u00f3n a 425 \u00b0C (800 \u00b0F)<\/strong><\/th><\/tr><\/thead><tbody><tr><td>Clase 150<\/td><td>19,6 bar (285 psi)<\/td><td>13,8 bar (200 psi)<\/td><td>12,1 bar (175 psi)<\/td><\/tr><tr><td>Clase 300<\/td><td>51,1 bar (740 psi)<\/td><td>44,8 bar (650 psi)<\/td><td>39,0 bar (566 psi)<\/td><\/tr><tr><td>Clase 600<\/td><td>102,1 bar (1480 psi)<\/td><td>89,6 bar (1300 psi)<\/td><td>77,9 bar (1130 psi)<\/td><\/tr><tr><td>Clase 900<\/td><td>153,2 bar (2220 psi)<\/td><td>134,4 bar (1950 psi)<\/td><td>116,9 bar (1695 psi)<\/td><\/tr><tr><td>Clase 1500<\/td><td>255,3 bar (3705 psi)<\/td><td>224,1 bar (3250 psi)<\/td><td>195,1 bar (2830 psi)<\/td><\/tr><tr><td>Clase 2500<\/td><td>425,5 bar (6170 psi)<\/td><td>373,4 bar (5415 psi)<\/td><td>325,1 bar (4715 psi)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Las clasificaciones de presi\u00f3n y temperatura de las v\u00e1lvulas de bola WCB exigen que el comprador verifique la temperatura real de funcionamiento al determinar la clasificaci\u00f3n de presi\u00f3n, en lugar de utilizar la presi\u00f3n de dise\u00f1o en condiciones ambientales. La v\u00e1lvula Clase 300, que opera a 425 grados cent\u00edgrados, funciona a una presi\u00f3n admisible mucho menor que la ambiente.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u00bfCu\u00e1l es su l\u00edmite de temperatura m\u00ednima?<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Piso est\u00e1ndar WCB: -29 grados Celsius<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">El hierro fundido de grado ASTM A216 WCB tiene una temperatura m\u00ednima de servicio est\u00e1ndar de -29 grados Celsius o -20 grados Fahrenheit. A temperaturas inferiores a este m\u00ednimo, no se garantiza su resistencia al impacto.<br>Los proyectos de construcci\u00f3n en regiones fr\u00edas, los sat\u00e9lites de GNL o cualquier otro servicio relacionado con la criogenia que requiera una temperatura m\u00ednima m\u00e1s baja deber\u00edan utilizar un material diferente.<br>LCB (ASTM A352 Grado LCB) aumenta la temperatura m\u00ednima a -46 grados Celsius. LCC la aumenta a -73 grados Celsius. <a href=\"https:\/\/www.onerovalve.com\/es\/product\/ultra-low-temperature-ball-valve\/\" target=\"_blank\" rel=\"noreferrer noopener\">Por debajo de -73 grados Celsius<\/a>, Se utilizan piezas fundidas de acero inoxidable austen\u00edtico o aleaci\u00f3n de n\u00edquel.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Verificaci\u00f3n de la prueba de impacto<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">En situaciones donde se requiere un rendimiento a bajas temperaturas en las proximidades del piso WCB, ONERO realiza pruebas de impacto Charpy con entalla en V a la temperatura m\u00ednima de dise\u00f1o. Esta informaci\u00f3n se incluye en la documentaci\u00f3n del material y ayuda a verificar la tenacidad del lote de fundici\u00f3n bas\u00e1ndose en los resultados de la prueba y no solo en el cumplimiento de la composici\u00f3n qu\u00edmica.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u00bfCu\u00e1l es su l\u00edmite de temperatura m\u00e1xima?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La temperatura m\u00e1xima pr\u00e1ctica para la norma ASTM A216 WCB es de 425 grados Celsius. <a href=\"https:\/\/www.onerovalve.com\/es\/product\/ultra-high-temperature-ball-valve\/\" target=\"_blank\" rel=\"noreferrer noopener\">Por encima de esta temperatura<\/a>, La grafitizaci\u00f3n de la microestructura del acero al carbono se convierte en un problema, ya que reduce progresivamente la resistencia a la fluencia y la tenacidad del material. No se trata de una falla repentina, sino de una degradaci\u00f3n a largo plazo que compromete la integridad de la v\u00e1lvula durante su vida \u00fatil.<br>Para temperaturas superiores a 425 grados Celsius, el acero WC6 (acero al cromo-molibdeno seg\u00fan ASTM A217) extiende el rango de temperatura hasta aproximadamente 595 grados Celsius. El WC9 cubre rangos de temperatura similares con una composici\u00f3n de aleaci\u00f3n diferente. Para temperaturas superiores a WC6 y WC9, se requieren aceros inoxidables austen\u00edticos o aleaciones a base de n\u00edquel.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">WCB vs. Forged A105: \u00bfCu\u00e1l elegir?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">ASTM A105 es la <a href=\"https:\/\/www.onerovalve.com\/es\/blog\/process\/forged-steel-industrial-ball-valves\/\" target=\"_blank\" rel=\"noreferrer noopener\">acero al carbono forjado<\/a> Equivalente utilizado para cuerpos de v\u00e1lvula de menor di\u00e1metro y con bridas. El cuerpo de v\u00e1lvula ASTM A216 WCB es fundido; el A105 es forjado. Ambos cubren rangos de temperatura y presi\u00f3n similares seg\u00fan la norma ASME B16.34 Grupo 1.1.<br>La selecci\u00f3n se basa en el tama\u00f1o y la complejidad. El acero forjado A105 es adecuado para cuerpos de v\u00e1lvula inferiores a DN100 (4 pulgadas), donde el forjado resulta econ\u00f3mico y produce una estructura granular m\u00e1s densa y uniforme. El acero fundido WCB es adecuado para cuerpos de v\u00e1lvula de mayor tama\u00f1o, donde la complejidad geom\u00e9trica y de tama\u00f1o hace que el forjado sea poco pr\u00e1ctico o antiecon\u00f3mico. Por encima de DN100, el WCB es la especificaci\u00f3n est\u00e1ndar para la mayor\u00eda de las aplicaciones de v\u00e1lvulas de bola de acero al carbono.<br>Las propiedades mec\u00e1nicas son comparables entre ambos materiales. El A105 presenta una resistencia a la tracci\u00f3n m\u00ednima ligeramente superior, de 485 MPa, frente a los 485 MPa del WCB, con un l\u00edmite el\u00e1stico de 250 MPa tanto para el A105 como para el WCB, lo que los hace pr\u00e1cticamente equivalentes. La elecci\u00f3n depende del m\u00e9todo de fabricaci\u00f3n y la econom\u00eda, no del rendimiento mec\u00e1nico.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Aplicaciones t\u00edpicas<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Las principales aplicaciones de las v\u00e1lvulas de bola WCB incluyen la distribuci\u00f3n de vapor, el aislamiento de oleoductos, el manejo de aguas residuales, los sistemas auxiliares de centrales el\u00e9ctricas y el procesamiento general de hidrocarburos. Su uso se limita a fluidos no corrosivos o ligeramente corrosivos dentro del rango de temperatura especificado. Para entornos \u00e1cidos, con cloruros o de alta humedad, las v\u00e1lvulas WCB se pueden reemplazar por v\u00e1lvulas de acero inoxidable.<br>ONERO ha suministrado v\u00e1lvulas de bola WCB a sistemas de vapor auxiliares de centrales el\u00e9ctricas en el sudeste asi\u00e1tico que requieren clasificaciones de Clase 600 a temperaturas de servicio continuo de 380 grados Celsius, y a proyectos de oleoductos de crudo en Oriente Medio que requieren v\u00e1lvulas de Clase 300 a Clase 900 en un pedido de proyecto de 400 unidades.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u00bfPor qu\u00e9 especificar v\u00e1lvulas de bola ONERO WCB?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La planta de fundici\u00f3n de v\u00e1lvulas de bola WCB de ONERO cuenta con una capacidad de 3000 toneladas y un control total del proceso, desde el modelo hasta el cuerpo final. Cada cuerpo de v\u00e1lvula de bola WCB de acero al carbono se somete a un examen radiogr\u00e1fico o ultras\u00f3nico seg\u00fan las normas aplicables antes del mecanizado.<\/p>\n\n\n\n<style>\n  .single-card-wrapper {\n    display: flex;\n    justify-content: center;\n    padding: 40px 5vw;\n    background-color: transparent;\n    box-sizing: border-box;\n  }\n  .single-card-wrapper .hero-card {\n    width: 100%;\n    max-width: 480px;\n    border: 1px solid #e0e0e0;\n    border-radius: 8px;\n    overflow: hidden;\n    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);\n    transition: transform 0.2s ease;\n    background: #fff;\n    display: flex;\n    flex-direction: column;\n    box-sizing: border-box;\n  }\n  .single-card-wrapper .hero-card:hover {\n    transform: translateY(-4px);\n  }\n  .single-card-wrapper .hero-card img {\n    width: 100%;\n    height: auto;\n    display: block;\n  }\n  .single-card-wrapper .hero-card-content {\n    padding: 16px;\n    flex-grow: 1;\n    display: flex;\n    flex-direction: column;\n    justify-content: space-between;\n    box-sizing: border-box;\n  }\n  .single-card-wrapper .hero-card-content .card-title {\n    font-size: 18px;\n    color: #1569AE;\n    font-weight: bold;\n    margin: 0 0 10px 0;\n  }\n  .single-card-wrapper .hero-card-content p {\n    font-size: 14px;\n    color: #333;\n    margin: 0 0 12px 0;\n    line-height: 1.4;\n  }\n  .single-card-wrapper .hero-card-content a {\n    display: inline-block;\n    padding: 8px 16px;\n    background-color: #1569AE;\n    color: #fff;\n    font-size: 13px;\n    text-decoration: none;\n    border-radius: 4px;\n    text-align: center;\n    transition: background-color 0.2s ease;\n  }\n  .single-card-wrapper .hero-card-content a:hover {\n    background-color: #125a96;\n  }\n<\/style>\n\n<div class=\"single-card-wrapper\">\n  <div class=\"hero-card\">\n    <a href=\"https:\/\/www.onerovalve.com\/es\/product\/floating-ball-valve\/\" target=\"_blank\">\n      <img decoding=\"async\" src=\"https:\/\/www.onerovalve.com\/wp-content\/uploads\/2024\/08\/Web-1920-%E2%80%93-11.jpg\" alt=\"V\u00e1lvula de bola flotante\">\n    <\/a>\n    <div class=\"hero-card-content\">\n      <div class=\"card-title\">V\u00e1lvula de bola flotante<\/div>\n      <p>Dise\u00f1o flotante sencillo para un sellado herm\u00e9tico. Econ\u00f3mico, bajo par de apriete. 2\u2033\u201342\u2033, Clase 150-2500LB.<\/p>\n      <a href=\"https:\/\/www.onerovalve.com\/es\/product\/floating-ball-valve\/\" target=\"_blank\">Ver producto<\/a>\n    <\/div>\n  <\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Las pruebas de presi\u00f3n hidrost\u00e1tica se realizan en todas las unidades terminadas, no solo por muestra. La documentaci\u00f3n incluye informes de pruebas de materiales con propiedades qu\u00edmicas y mec\u00e1nicas, registros de inspecci\u00f3n de fundici\u00f3n y certificados de pruebas de presi\u00f3n.<br>ONERO <a href=\"https:\/\/www.onerovalve.com\/es\/quality\/\" target=\"_blank\" rel=\"noreferrer noopener\">calidad<\/a> Cuenta con la certificaci\u00f3n API 607 para v\u00e1lvulas de bola WCB, y la certificaci\u00f3n NACE MR0175 est\u00e1 disponible para acero al carbono en aplicaciones con fluidos corrosivos. Se ofrece una gama completa de tama\u00f1os, desde 1\/2 pulgada hasta 48 pulgadas, y desde la Clase 150 hasta la Clase 2500, con plazos de entrega est\u00e1ndar de 4 a 6 semanas para configuraciones en stock. <a href=\"https:\/\/www.onerovalve.com\/es\/contact\/\" target=\"_blank\" rel=\"noreferrer noopener\">Contacto<\/a> nuestro equipo t\u00e9cnico hoy.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-fe48e5de wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-fill\"><a class=\"wp-block-button__link has-white-color has-text-color has-background has-extra-small-font-size has-custom-font-size wp-element-button\" href=\"https:\/\/www.onerovalve.com\/es\/contact\/\" style=\"border-radius:100px;background-color:#2196f3\" target=\"_blank\" rel=\"noreferrer noopener\"><strong><strong>Solicita un presupuesto<\/strong><\/strong><\/a><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>Quick Answer\uff1a WCB is the most commonly specified grade of cast carbon steel used in industrial ball valves, comprising the vast majority of oil\/gas, steam, power,<span class=\"excerpt-hellip\"> [\u2026]<\/span><\/p>\n","protected":false},"author":1,"featured_media":6963,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[62],"tags":[],"class_list":["post-6951","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-temperature"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Carbon Steel Ball Valve WCB Pressure Temperature Ratings | ONERO<\/title>\n<meta name=\"description\" content=\"Review ASME B16.34 pressure temperature ratings for carbon steel ball valve WCB bodies, including -29\u00b0C 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