{"id":4864,"date":"2025-12-19T00:48:16","date_gmt":"2025-12-19T07:48:16","guid":{"rendered":"https:\/\/fshualinkeji.com\/?p=4864"},"modified":"2025-12-19T00:59:31","modified_gmt":"2025-12-19T07:59:31","slug":"designacao-da-especificacao-do-tubo","status":"publish","type":"post","link":"https:\/\/fshualinkeji.com\/pt\/designacao-da-especificacao-do-tubo\/","title":{"rendered":"Designa\u00e7\u00e3o das especifica\u00e7\u00f5es dos tubos \u2013 Guia completo"},"content":{"rendered":"<p style=\"font-size:16px\">As especifica\u00e7\u00f5es dos tubos s\u00e3o geralmente indicadas usando v\u00e1rios m\u00e9todos, como DN, polegadas, D, \u03a6, De, dn e d. Este artigo apresenta as especifica\u00e7\u00f5es b\u00e1sicas e os cen\u00e1rios t\u00edpicos de aplica\u00e7\u00e3o de tubos.<\/p>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-1e659707 alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"750\" height=\"500\" src=\"https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/10\/hdpe-pipe-2.jpg\" alt=\"\" class=\"wp-image-3900\" srcset=\"https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/10\/hdpe-pipe-2.jpg 750w, https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/10\/hdpe-pipe-2-300x200.jpg 300w, https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/10\/hdpe-pipe-2-18x12.jpg 18w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/figure>\n<\/div><\/div>\n\n\n\t\t\t\t<div class=\"wp-block-uagb-table-of-contents uagb-toc__align-left uagb-toc__columns-1  uagb-block-38528f04\"\n\t\t\t\t\tdata-scroll= \"1\"\n\t\t\t\t\tdata-offset= \"30\"\n\t\t\t\t\tstyle=\"\"\n\t\t\t\t>\n\t\t\t\t<div class=\"uagb-toc__wrap\">\n\t\t\t\t\t\t<div class=\"uagb-toc__title\">\n\t\t\t\t\t\t\tTabela de conte\u00fados\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"uagb-toc__list-wrap\">\n\t\t\t\t\t\t<ol class=\"uagb-toc__list\"><li class=\"uagb-toc__list\"><a href=\"#meaning-of-various-expressions\" class=\"uagb-toc-link__trigger\">Significado de v\u00e1rias express\u00f5es<\/a><li class=\"uagb-toc__list\"><a href=\"#differences-between-various-representation-methods\" class=\"uagb-toc-link__trigger\">Diferen\u00e7as entre v\u00e1rios m\u00e9todos de representa\u00e7\u00e3o<\/a><ul class=\"uagb-toc__list\"><li class=\"uagb-toc__list\"><a href=\"#scope-of-application-and-standard-system\" class=\"uagb-toc-link__trigger\">Escopo de aplica\u00e7\u00e3o e sistema padr\u00e3o<\/a><li class=\"uagb-toc__list\"><li class=\"uagb-toc__list\"><a href=\"#indicates-emphasis\" class=\"uagb-toc-link__trigger\">Indica a \u00eanfase<\/a><\/li><\/ul><\/li><li class=\"uagb-toc__list\"><a href=\"#final-thought\" class=\"uagb-toc-link__trigger\">Pensamento final<\/a><\/ul><\/ol>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-6d6910d0\"><h2 class=\"uagb-heading-text\">Significado de v\u00e1rias express\u00f5es<\/h2><\/div>\n\n\n\n<p style=\"font-size:16px\">DN \u00e9 uma abrevia\u00e7\u00e3o de Nominal Diameter (di\u00e2metro nominal), que representa o di\u00e2metro nominal de um tubo. \u00c9 o di\u00e2metro padronizado do tubo.<\/p>\n\n\n\n<p style=\"font-size:16px\">O DN n\u00e3o \u00e9 nem o di\u00e2metro externo nem o di\u00e2metro interno, mas um di\u00e2metro nominal que se aproxima do tamanho real do tubo. \u00c9 usado principalmente no projeto e na constru\u00e7\u00e3o de engenharia de tubula\u00e7\u00f5es para facilitar a sele\u00e7\u00e3o e a correspond\u00eancia de tubos e conex\u00f5es.<\/p>\n\n\n\n<p style=\"font-size:16px\">Por exemplo, um tubo com di\u00e2metro nominal de DN100 geralmente corresponde a um di\u00e2metro externo de 108 mm, enquanto seu di\u00e2metro interno varia de acordo com a espessura da parede.<\/p>\n\n\n\n<p style=\"font-size:16px\">A polegada \u00e9 uma unidade imperial de comprimento. Nas especifica\u00e7\u00f5es de tubos, as polegadas s\u00e3o comumente usadas para representar o di\u00e2metro nominal dos tubos, como 1\/2\u201d, 3\/4\u201d, 1\u201d etc., que correspondem ao DN, respectivamente.<\/p>\n\n\n\n<p style=\"font-size:16px\">1 polegada = 25,4 mm, portanto, 1 polegada (1\u201d) corresponde a DN25. No sistema imperial, 1 polegada equivale a 8 pontos, 1\/2\u201d equivale a 4 pontos, correspondendo a DN15 (comumente conhecido como tubo de 4 pontos); 3\/4\u201d equivale a 6 pontos, correspondendo a DN20 (comumente conhecido como tubo de 6 pontos). D geralmente representa o di\u00e2metro externo de um tubo. Em aplica\u00e7\u00f5es pr\u00e1ticas, ele costuma ser usado junto com a espessura da parede para indicar as especifica\u00e7\u00f5es do tubo, como D108\u00d74, que indica um tubo com di\u00e2metro externo de 108 mm e espessura de parede de 4 mm.<\/p>\n\n\n\n<p style=\"font-size:16px\">\u03a6 \u00e9 comumente usado em engenharia para representar o di\u00e2metro de um c\u00edrculo comum. Semelhante a D, ele \u00e9 usado para representar o di\u00e2metro externo de tubos, geralmente para tubos de a\u00e7o sem costura ou tubos de metais n\u00e3o ferrosos.<\/p>\n\n\n\n<p style=\"font-size:16px\">Geralmente \u00e9 rotulado na forma de \u201cdi\u00e2metro externo \u00d7 espessura da parede\u201d, por exemplo, \u03a6108 x 4, indicando um tubo com di\u00e2metro externo de 108 mm e espessura de parede de 4 mm.<\/p>\n\n\n\n<p style=\"font-size:16px\">De \u00e9 a abrevia\u00e7\u00e3o de External Diameter (Di\u00e2metro Externo), usado principalmente para o di\u00e2metro externo nominal de tubos pl\u00e1sticos de abastecimento de \u00e1gua e drenagem de edif\u00edcios, com a unidade em mil\u00edmetros. Geralmente \u00e9 rotulado na forma de \u201cdi\u00e2metro externo \u00d7 espessura da parede\u201d. Por exemplo, De25\u00d73 indica um tubo com um di\u00e2metro externo de 25 mm e uma espessura de parede de 3 mm.<\/p>\n\n\n\n<p style=\"font-size:16px\">dn \u00e9 geralmente usado para representar o di\u00e2metro externo nominal do abastecimento de \u00e1gua do edif\u00edcio e <a href=\"https:\/\/fshualinkeji.com\/pt\/tubo-de-drenagem-de-pead\/\">tubos pl\u00e1sticos de drenagem<\/a>, O DN50 \u00e9 semelhante ao De, mas o dn \u00e9 mais comumente usado em normas europeias ou normas ISO. Por exemplo, DN50 indica um tubo de pl\u00e1stico com um di\u00e2metro externo nominal de 50 mm.<\/p>\n\n\n\n<p style=\"font-size:16px\">O \u2018d\u2019 \u00e9 normalmente usado para indicar o di\u00e2metro interno de tubos, como tubos de concreto e tubos de argila; ele representa o di\u00e2metro interno do tubo de concreto. Por exemplo, d300 indica um tubo de concreto com di\u00e2metro interno de 300 mm.<\/p>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-b8f97d4a alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"750\" height=\"501\" src=\"https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/08\/pe-pipe-1.jpg\" alt=\"\" class=\"wp-image-3155\" srcset=\"https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/08\/pe-pipe-1.jpg 750w, https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/08\/pe-pipe-1-300x200.jpg 300w, https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/08\/pe-pipe-1-18x12.jpg 18w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-1371600e\"><h2 class=\"uagb-heading-text\">Diferen\u00e7as entre v\u00e1rios m\u00e9todos de representa\u00e7\u00e3o<\/h2><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-bda815ba\"><h4 class=\"uagb-heading-text\">Escopo de aplica\u00e7\u00e3o e sistema padr\u00e3o<\/h4><\/div>\n\n\n\n<p style=\"font-size:16px\">DN \u00e9 uma designa\u00e7\u00e3o amplamente usada na China e em muitos padr\u00f5es internacionais, aplic\u00e1vel a v\u00e1rios materiais de tubos, como tubos de a\u00e7o, tubos de ferro fundido e tubos de pl\u00e1stico, e usada em v\u00e1rios campos de engenharia, incluindo abastecimento e drenagem de \u00e1gua, HVAC e abastecimento de g\u00e1s.<\/p>\n\n\n\n<p style=\"font-size:16px\">D e \u03a6 s\u00e3o comumente usados em padr\u00f5es nacionais e internacionais relacionados a tubos de metal, especialmente em \u00e1reas como fabrica\u00e7\u00e3o de m\u00e1quinas e petroqu\u00edmica, onde s\u00e3o necess\u00e1rias alta precis\u00e3o e resist\u00eancia das dimens\u00f5es dos tubos.<\/p>\n\n\n\n<p style=\"font-size:16px\">d \u00e9 usado principalmente em normas relacionadas a alguns materiais de tubula\u00e7\u00e3o tradicionais em que o di\u00e2metro interno \u00e9 o principal par\u00e2metro de projeto, como tubos de concreto e tubos de argila.<\/p>\n\n\n\n<p style=\"font-size:16px\">De e dn s\u00e3o comumente encontrados em normas relacionadas a tubos de pl\u00e1stico. Diferentes pa\u00edses ou regi\u00f5es podem optar por usar De ou dn, dependendo de seu sistema padr\u00e3o. Por exemplo, De \u00e9 comumente usado nos padr\u00f5es chineses para a constru\u00e7\u00e3o de tubos pl\u00e1sticos de abastecimento de \u00e1gua e drenagem, enquanto dn \u00e9 comumente usado nos padr\u00f5es europeus.<\/p>\n\n\n\n<p style=\"font-size:16px\">A polegada \u00e9 usada principalmente em pa\u00edses e regi\u00f5es que adotam padr\u00f5es imperiais, bem como em alguns projetos que introduziram tecnologias ou equipamentos que est\u00e3o de acordo com os padr\u00f5es internacionais.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-12c564b4\"><h4 class=\"uagb-heading-text\">Indica a \u00eanfase<\/h4><\/div>\n\n\n\n<p style=\"font-size:16px\">O DN se concentra na padroniza\u00e7\u00e3o das especifica\u00e7\u00f5es de tubos e conex\u00f5es a partir de uma perspectiva de tamanho nominal, facilitando a sele\u00e7\u00e3o e a correspond\u00eancia durante o projeto, a fabrica\u00e7\u00e3o e a instala\u00e7\u00e3o.<\/p>\n\n\n\n<p style=\"font-size:16px\">D, \u03a6, De e dn enfatizam o di\u00e2metro externo real do tubo, fornecendo orienta\u00e7\u00e3o mais direta para o controle dimensional durante a fabrica\u00e7\u00e3o e a instala\u00e7\u00e3o do tubo.<\/p>\n\n\n\n<p style=\"font-size:16px\">d enfatiza o di\u00e2metro interno do tubo, o que \u00e9 crucial para materiais de tubos em que par\u00e2metros como a taxa de fluxo e a velocidade precisam ser determinados com base no di\u00e2metro interno.<\/p>\n\n\n\n<p style=\"font-size:16px\">A polegada \u00e9 uma unidade de medida imperial, que permite melhor compatibilidade com equipamentos e acess\u00f3rios que usam outras unidades imperiais em um sistema que adota o padr\u00e3o imperial.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-3d44f863\"><h2 class=\"uagb-heading-text\">Pensamento final<\/h2><\/div>\n\n\n\n<p style=\"font-size:16px\">Ao selecionar um modelo, primeiro determine o material (metal\/pl\u00e1stico\/concreto), depois combine as especifica\u00e7\u00f5es padr\u00e3o (DN\/De\/d) com base na press\u00e3o e na taxa de fluxo e, por fim, confirme as dimens\u00f5es espec\u00edficas em conjunto com o m\u00e9todo de conex\u00e3o e os padr\u00f5es do setor.<\/p>","protected":false},"excerpt":{"rendered":"<p>Pipe specifications are commonly indicated using various methods such as DN, inch, D, \u03a6, De, dn, and d. This article [&hellip;]<\/p>","protected":false},"author":1,"featured_media":3900,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"unboxed","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4864","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pipe Specification Designation - Comprehensive Guide<\/title>\n<meta name=\"description\" content=\"Pipe specifications are commonly indicated using various methods such as DN, inch, D, \u03a6, De, dn, and d.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fshualinkeji.com\/pt\/designacao-da-especificacao-do-tubo\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta 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