{"id":1597,"date":"2026-08-24T14:22:37","date_gmt":"2026-08-24T06:22:37","guid":{"rendered":"https:\/\/bastone-petrochem.com\/?p=1597"},"modified":"2026-08-24T14:22:37","modified_gmt":"2026-08-24T06:22:37","slug":"pp-grade-ppr-pipe-line","status":"publish","type":"post","link":"https:\/\/bastone-petrochem.com\/es\/pp-grade-ppr-pipe-line\/","title":{"rendered":"\u00bfQu\u00e9 grado de PP necesita una l\u00ednea de tuber\u00eda PP-R?"},"content":{"rendered":"

Una ficha t\u00e9cnica de Hyosung para grado de tuber\u00eda indica \u201cPPR 125, MRS 12.5 MPa.\u201d El n\u00famero de grado es diez veces la resistencia m\u00ednima requerida a 20 \u00b0C durante 50 a\u00f1os (ISO 12162:2009). Eso lo convierte en una clase de resistencia hidrost\u00e1tica, no en una clasificaci\u00f3n de temperatura.<\/p>\n\n\n\n

Un extrusor de tuber\u00edas ya comprometido con PP-R necesita una especificaci\u00f3n m\u00e1s estricta que ese \u00fanico n\u00famero. La resina es un copol\u00edmero aleatorio, el \u00edndice de fluidez se sit\u00faa en el extremo inferior del rango de PP, y el n\u00famero de clasificaci\u00f3n solo cuenta la mitad de la historia de presi\u00f3n.<\/p>\n\n\n\n

Qu\u00e9 califica a una resina como grado de tuber\u00eda PP-R<\/h2>\n\n\n\n

Un grado de tuber\u00eda PP-R es un polipropileno copol\u00edmero aleatorio<\/a> para extrusi\u00f3n de tuber\u00edas cuya resistencia hidrost\u00e1tica est\u00e1 clasificada seg\u00fan ISO 12162 y cuyo cumplimiento est\u00e1 certificado contra un est\u00e1ndar de sistemas de tuber\u00edas como ISO 15874 o GB\/T 18742.<\/p>\n\n\n\n

La elecci\u00f3n entre los tres grados principales de polipropileno<\/a> ya est\u00e1 resuelta para tuber\u00edas. ISO 12162:2009 Tabla 2 asigna al copol\u00edmero de PP un coeficiente de dise\u00f1o m\u00ednimo de 1.25 frente a 1.6 para el homopol\u00edmero, por lo que el copol\u00edmero conserva m\u00e1s de su resistencia medida para el esfuerzo de dise\u00f1o.<\/p>\n\n\n\n

Un detalle de cumplimiento vale la pena verificar: las pruebas hidrost\u00e1ticas en las fichas t\u00e9cnicas del productor se reclaman para \u201ctuber\u00edas producidas con\u201d la resina, no para el pellet en s\u00ed. Ambas fichas t\u00e9cnicas de PP-R de Hyosung citan \u201cISO\/DIS 15874-2,\u201d la designaci\u00f3n de borrador, no el est\u00e1ndar publicado.<\/p>\n\n\n\n

\u00bfQu\u00e9 tan estrecha es la ventana de \u00edndice de fluidez en un grado de tuber\u00eda?<\/h2>\n\n\n\n

Los grados de tuber\u00eda PP-R de dos productores no relacionados se agrupan en 0.22 a 0.25 g\/10 min a 230 \u00b0C \/ 2.16 kg, muy por debajo de la banda de 0.3 a 0.5 g\/10 min que circula como m\u00ednimo para grado de tuber\u00eda.<\/p>\n\n\n\n

Grado<\/th>Productor<\/th>MFI (g\/10 min)<\/th>Condici\u00f3n<\/th>M\u00e9todo<\/th><\/tr><\/thead>
R200P (PP-R)<\/td>Hyosung<\/td>0.25<\/td>230 \u00b0C \/ 2.16 kg<\/td>ASTM D1238<\/td><\/tr>
R202P (PP-RCT)<\/td>Hyosung<\/td>0.22<\/td>230 \u00b0C \/ 2.16 kg<\/td>ASTM D1238 \/ ISO 1133<\/td><\/tr>
RA130E (PP-R)<\/td>Borealis<\/td>0.25<\/td>230 \u00b0C \/ 2.16 kg<\/td>ISO 1133
<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

La l\u00ednea de extrusi\u00f3n, no el uso final de la tuber\u00eda, mantiene el \u00edndice de fluidez tan bajo. La arquitectura de cadena lineal del PP-R le da una resistencia de fusi\u00f3n limitada, y una resina que fluye demasiado f\u00e1cil se hunde dentro del dado, produciendo una pared m\u00e1s gruesa en la parte inferior y m\u00e1s delgada en la superior.<\/p>\n\n\n\n

\"Secci\u00f3n<\/figure>\n\n\n\n

Copol\u00edmero aleatorio para extrusi\u00f3n de tuber\u00edas como PetroChina Dushanzi T4401<\/a> se sit\u00faa en esta banda de \u00edndice de fluidez. El MFI solo no le dice si un grado se estirar\u00e1 limpiamente: tambi\u00e9n necesita datos de distribuci\u00f3n de peso molecular para juzgar el comportamiento de resistencia de fusi\u00f3n en la l\u00ednea.<\/p>\n\n\n\n

Un grado citado cuya TDS imprime una cifra superior a 0.3 g\/10 min a 230 \u00b0C \/ 2.16 kg es o un copol\u00edmero aleatorio de uso general o un grado de moldeo por inyecci\u00f3n, no una resina para tuber\u00edas.<\/p>\n\n\n\n

Qu\u00e9 clasifica el n\u00famero en una designaci\u00f3n de grado PP-R<\/h2>\n\n\n\n

ISO 12162:2009 Cl\u00e1usula 4 requiere que el n\u00famero de clasificaci\u00f3n sea 10 veces el MRS en megapascales. El MRS es el l\u00edmite de confianza inferior del 97.5% de resistencia hidrost\u00e1tica a 20 \u00b0C durante 50 a\u00f1os, extrapolado seg\u00fan ISO 9080.<\/p>\n\n\n\n

Los escalones en el rango que cubre los grados PP-R:<\/p>\n\n\n\n

N\u00famero de clasificaci\u00f3n<\/th>MRS (MPa)<\/th>Rango de l\u00edmite de confianza inferior (MPa)<\/th><\/tr><\/thead>
63<\/td>6.3<\/td>3 a < 8<\/td><\/tr>
80<\/td>8.0<\/td>0 a < 10<\/td><\/tr>
100<\/td>10.0<\/td>0 a < 11.2<\/td><\/tr>
112<\/td>11.2<\/td>2 a < 12.5<\/td><\/tr>
125<\/td>12.5<\/td>5 a < 14<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Los grados realmente vendidos para tuber\u00edas se clasifican en 112 y 125, por encima del \u201c100\u201d que la jerga comercial trata como el tope de la escalera.<\/p>\n\n\n\n

Un comprador que lea la serie 63 \/ 80 \/ 100 como una escala de temperatura en lugar de una escala de resistencia pasar\u00e1 por alto por completo los grados que se sit\u00faan por encima de ese rango.<\/p>\n\n\n\n

La clasificaci\u00f3n establece solo el lado de la resina en la ecuaci\u00f3n de presi\u00f3n. El espesor de pared, expresado como SDR (di\u00e1metro exterior dividido por espesor de pared), establece el resto.<\/p>\n\n\n\n

ISO 12162:2009 Cl\u00e1usula 5 establece que los valores CRS, la clasificaci\u00f3n de resistencia a temperatura elevada, \u201cno est\u00e1n destinados para uso en aplicaciones con perfiles de temperatura, p. ej., como se define en ISO 10508.\u201d La aplicaci\u00f3n del PP-R es exactamente tal sistema.<\/p>\n\n\n\n

La clasificaci\u00f3n del material permite comparar grados, pero convertir una cifra CRS en una clase de presi\u00f3n mediante aritm\u00e9tica es un error seguro y comprobable.<\/p>\n\n\n\n

La inversi\u00f3n MRS\/CRS entre PP-R y PP-RCT<\/h3>\n\n\n\n

Dos grados de un productor ilustran por qu\u00e9 el n\u00famero de clasificaci\u00f3n solo no elige el material correcto para servicio de agua caliente. El R200P de Hyosung (PP-R) se clasifica en MRS 12.5, CRS 3.3 MPa; su R202P (PP-RCT) se clasifica en MRS 11.2, CRS 5.0 MPa.<\/p>\n\n\n\n

El PP-RCT se sit\u00faa un escal\u00f3n m\u00e1s abajo en MRS, el n\u00famero que codifica la designaci\u00f3n, mientras lleva 52% m\u00e1s CRS. Clasificar cotizaciones solo por el n\u00famero de clasificaci\u00f3n selecciona el material m\u00e1s d\u00e9bil para el servicio para el que est\u00e1 dise\u00f1ado el sistema.<\/p>\n\n\n\n

Qu\u00e9 cifras de la TDS verifican un grado de materia prima PP-R<\/h2>\n\n\n\n

Cuatro cifras en una TDS determinan si un grado citado es lo que la cotizaci\u00f3n afirma: \u00edndice de fluidez con su condici\u00f3n de prueba, densidad, clasificaci\u00f3n hidrost\u00e1tica y certificaci\u00f3n de est\u00e1ndar de tuber\u00edas.<\/p>\n\n\n\n

    \n
  • MFI con condici\u00f3n de prueba y m\u00e9todo.<\/strong> El n\u00famero debe llevar su temperatura, carga y est\u00e1ndar de prueba (ASTM D1238 o ISO 1133). El R202P de Hyosung imprime 0.22 g\/10 min bajo ambos m\u00e9todos, pero ASTM D1238-23 dice que los dos \u201cdifieren en contenido t\u00e9cnico,\u201d por lo que una cifra con doble etiqueta es un valor t\u00edpico, no una medici\u00f3n con doble certificaci\u00f3n.<\/li>\n
  • Densidad.<\/strong> Los grados de tuber\u00eda PP-R se sit\u00faan cerca de 0.90 g\/cm3.<\/li>\n
  • Clasificaci\u00f3n hidrost\u00e1tica.<\/strong> Un valor de MRS en megapascales con una base de 20 \u00b0C \/ 50 a\u00f1os. Un c\u00f3digo de grado como PPR-P00 (Sinopec Zhongyuan) que no lleva ning\u00fan MRS es un espacio de nombres del productor, no una declaraci\u00f3n de propiedad.<\/li>\n
  • Certificaci\u00f3n de est\u00e1ndar de tuber\u00eda.<\/strong> La TDS debe indicar el est\u00e1ndar de tuber\u00eda contra el cual se prob\u00f3 el lote, y el certificado debe citar el est\u00e1ndar publicado en lugar de una designaci\u00f3n de borrador.<\/li>\n<\/ul>\n\n\n\n

    La cl\u00e1usula 3.4 de ISO 12162:2009 define CRS con un sub\u00edndice de temperatura y tiempo: CRS a theta y t. Ambas hojas de datos de Hyosung imprimen CRS sin calificadores.<\/p>\n\n\n\n

    La cifra que rige el servicio de agua caliente llega sin los dos valores que requiere el est\u00e1ndar de clasificaci\u00f3n. Solicite la base de temperatura y tiempo por escrito antes de comparar los n\u00fameros de CRS de dos productores.<\/p>\n\n\n\n

    PPR-P00 imprime una tolerancia de \u00edndice de fluidez de m\u00e1s o menos 0.1 sobre un nominal de 0.25 g\/10 min, colocando la banda de aceptaci\u00f3n en 0.15 a 0.35. Dos lotes que ambos pasan pueden diferir en m\u00e1s de un factor de dos en el \u00edndice de fluidez.<\/p>\n\n\n\n

    Esa brecha es lo que debe recalificarse en la l\u00ednea al cambiar a un grado \u201cequivalente\u201d. Los est\u00e1ndares de tuber\u00eda limitan cu\u00e1nto puede variar el \u00edndice de fluidez entre el pellet y la tuber\u00eda precisamente por esta raz\u00f3n.<\/p>\n\n\n\n

    Donde la mayor\u00eda de las especificaciones fallan<\/h2>\n\n\n\n

    El COA le da cuatro n\u00fameros; la hoja de especificaciones le da la ventana; la aplicaci\u00f3n le dice qu\u00e9 esquina de la ventana realmente necesita.<\/p>\n\n\n\n

    La mayor\u00eda de las especificaciones de grado se detienen en el n\u00famero de clasificaci\u00f3n. La cl\u00e1usula 8 de ISO 12162:2009 permite que un material sea \u201cdesignado al siguiente n\u00famero de clasificaci\u00f3n inferior\u201d, por lo que una cotizaci\u00f3n que dice \u201cPPR 100\u201d podr\u00eda describir una resina cuyo MRS es en realidad 11.2. La designaci\u00f3n es un piso, no una medici\u00f3n.<\/p>\n\n\n\n

    Fije la especificaci\u00f3n a las cifras de MRS y CRS en la hoja de datos, confirme que el valor del \u00edndice de fluidez lleva su condici\u00f3n de prueba y verifique contra qu\u00e9 est\u00e1ndar de tuber\u00eda se certific\u00f3 el lote. Todo lo dem\u00e1s en la cotizaci\u00f3n es un espacio de nombres.<\/p>","protected":false},"excerpt":{"rendered":"

    A Hyosung pipe-grade datasheet states “PPR 125, MRS 12.5 MPa.” The grade number is ten times the minimum required strength at 20 C over 50 years (ISO 12162:2009). That makes it a hydrostatic strength class, not a temperature rating. A pipe extruder already committed to PP-R needs a tighter specification than that single number. The […]<\/p>\n","protected":false},"author":4,"featured_media":1596,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1597","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"blocksy_meta":[],"acf":[],"yoast_head":"\nWhich PP Grade Does a PP-R Pipe Line Need? - BASTONE<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/bastone-petrochem.com\/es\/pp-grade-ppr-pipe-line\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which PP Grade Does a PP-R Pipe Line Need? - BASTONE\" \/>\n<meta property=\"og:description\" content=\"A Hyosung pipe-grade datasheet states “PPR 125, MRS 12.5 MPa.” The grade number is ten times the minimum required strength at 20 C over 50 years (ISO 12162:2009). That makes it a hydrostatic strength class, not a temperature rating. A pipe extruder already committed to PP-R needs a tighter specification than that single number. 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- BASTONE","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:\/\/bastone-petrochem.com\/es\/pp-grade-ppr-pipe-line\/","og_locale":"es_ES","og_type":"article","og_title":"Which PP Grade Does a PP-R Pipe Line Need? - BASTONE","og_description":"A Hyosung pipe-grade datasheet states “PPR 125, MRS 12.5 MPa.” The grade number is ten times the minimum required strength at 20 C over 50 years (ISO 12162:2009). That makes it a hydrostatic strength class, not a temperature rating. A pipe extruder already committed to PP-R needs a tighter specification than that single number. 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- BASTONE","isPartOf":{"@id":"https:\/\/bastone-petrochem.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/bastone-petrochem.com\/pp-grade-ppr-pipe-line\/#primaryimage"},"image":{"@id":"https:\/\/bastone-petrochem.com\/pp-grade-ppr-pipe-line\/#primaryimage"},"thumbnailUrl":"https:\/\/bastone-petrochem.com\/wp-content\/uploads\/2026\/08\/pp-grade-for-ppr-pipe-1-53e15668.png","datePublished":"2026-08-24T06:22:37+00:00","breadcrumb":{"@id":"https:\/\/bastone-petrochem.com\/pp-grade-ppr-pipe-line\/#breadcrumb"},"inLanguage":"es","potentialAction":[{"@type":"ReadAction","target":["https:\/\/bastone-petrochem.com\/pp-grade-ppr-pipe-line\/"]}]},{"@type":"ImageObject","inLanguage":"es","@id":"https:\/\/bastone-petrochem.com\/pp-grade-ppr-pipe-line\/#primaryimage","url":"https:\/\/bastone-petrochem.com\/wp-content\/uploads\/2026\/08\/pp-grade-for-ppr-pipe-1-53e15668.png","contentUrl":"https:\/\/bastone-petrochem.com\/wp-content\/uploads\/2026\/08\/pp-grade-for-ppr-pipe-1-53e15668.png","width":1672,"height":941,"caption":"Cross-section of a PP-R pipe inside an extrusion die showing thicker wall at the bottom and thinner wall at the top due to melt sag from low melt strength."},{"@type":"BreadcrumbList","@id":"https:\/\/bastone-petrochem.com\/pp-grade-ppr-pipe-line\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/bastone-petrochem.com\/"},{"@type":"ListItem","position":2,"name":"Which PP Grade Does a PP-R Pipe Line Need?"}]},{"@type":"WebSite","@id":"https:\/\/bastone-petrochem.com\/#website","url":"https:\/\/bastone-petrochem.com\/","name":"BAST\u00d3N","description":"","publisher":{"@id":"https:\/\/bastone-petrochem.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/bastone-petrochem.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"es"},{"@type":"Organization","@id":"https:\/\/bastone-petrochem.com\/#organization","name":"BAST\u00d3N","url":"https:\/\/bastone-petrochem.com\/","logo":{"@type":"ImageObject","inLanguage":"es","@id":"https:\/\/bastone-petrochem.com\/#\/schema\/logo\/image\/","url":"https:\/\/bastone-petrochem.com\/wp-content\/uploads\/2022\/12\/cropped-site_icon-1.png","contentUrl":"https:\/\/bastone-petrochem.com\/wp-content\/uploads\/2022\/12\/cropped-site_icon-1.png","width":512,"height":512,"caption":"BASTONE"},"image":{"@id":"https:\/\/bastone-petrochem.com\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/bastone-petrochem.com\/#\/schema\/person\/e7ac5c8da49e0875ec220147ea11b63b","name":"Stoneexpert","image":{"@type":"ImageObject","inLanguage":"es","@id":"https:\/\/bastone-petrochem.com\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/ccbc3bd4b33231373976b8b8852b2182bef518e4e4af70fdf506c36010f421ec?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/ccbc3bd4b33231373976b8b8852b2182bef518e4e4af70fdf506c36010f421ec?s=96&d=mm&r=g","caption":"Stoneexpert"},"url":"https:\/\/bastone-petrochem.com\/es\/author\/zmd88259886gmail-com\/"}]}},"_links":{"self":[{"href":"https:\/\/bastone-petrochem.com\/es\/wp-json\/wp\/v2\/posts\/1597","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bastone-petrochem.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bastone-petrochem.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bastone-petrochem.com\/es\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/bastone-petrochem.com\/es\/wp-json\/wp\/v2\/comments?post=1597"}],"version-history":[{"count":1,"href":"https:\/\/bastone-petrochem.com\/es\/wp-json\/wp\/v2\/posts\/1597\/revisions"}],"predecessor-version":[{"id":1685,"href":"https:\/\/bastone-petrochem.com\/es\/wp-json\/wp\/v2\/posts\/1597\/revisions\/1685"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/bastone-petrochem.com\/es\/wp-json\/wp\/v2\/media\/1596"}],"wp:attachment":[{"href":"https:\/\/bastone-petrochem.com\/es\/wp-json\/wp\/v2\/media?parent=1597"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bastone-petrochem.com\/es\/wp-json\/wp\/v2\/categories?post=1597"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bastone-petrochem.com\/es\/wp-json\/wp\/v2\/tags?post=1597"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}