{"id":6095,"date":"2025-12-22T13:22:21","date_gmt":"2025-12-22T05:22:21","guid":{"rendered":"https:\/\/uniasen.com\/?p=6095"},"modified":"2025-12-24T14:48:27","modified_gmt":"2025-12-24T06:48:27","slug":"difference-between-erw-and-efw-pipe","status":"publish","type":"post","link":"https:\/\/uniasen.com\/pt\/blog\/diferenca-entre-os-tubos-erw-e-efw\/","title":{"rendered":"Diferen\u00e7a entre tubos ERW e EFW"},"content":{"rendered":"

As diferen\u00e7as entre as variedades de tubos soldados se devem principalmente a seus diferentes processos de fabrica\u00e7\u00e3o. No cen\u00e1rio de fabrica\u00e7\u00e3o e soldagem de tubos, dois m\u00e9todos de fabrica\u00e7\u00e3o se destacam - ERW e EFW, produzindo Tubos ERW<\/a> e tubos EFW, respectivamente.\u00a0<\/span><\/p>\n

Os dois m\u00e9todos podem confundir voc\u00ea devido aos nomes semelhantes e \u00e0 soldagem el\u00e9trica envolvida em ambos os processos de fabrica\u00e7\u00e3o. No entanto, eles s\u00e3o diferentes em muitos aspectos.\u00a0<\/span><\/p>\n

Para selecionar o tubo certo para seus projetos estruturais e de engenharia, voc\u00ea deve saber diferenciar os tubos ERW e EFW, pois eles t\u00eam especifica\u00e7\u00f5es diferentes. Neste artigo, discutiremos os dois tipos de tubos e detalharemos suas diferen\u00e7as. Com essas informa\u00e7\u00f5es, voc\u00ea poder\u00e1 escolher a melhor op\u00e7\u00e3o entre os tubos ERW e EFW.<\/span><\/p>\n

Tabela de compara\u00e7\u00e3o entre ERW e EFW<\/h2>\n\n\n\n\n\n\n\n\n\n
Aspecto<\/b><\/td>\nERW (soldagem por resist\u00eancia el\u00e9trica)<\/b><\/td>\nEFW (soldagem por fus\u00e3o el\u00e9trica)<\/b><\/td>\n<\/tr>\n
Formul\u00e1rio completo<\/b><\/td>\nSoldado por resist\u00eancia el\u00e9trica.<\/span><\/td>\nSoldado por fus\u00e3o el\u00e9trica (geralmente descrito como soldado por fus\u00e3o el\u00e9trica\/arco).<\/span><\/td>\n<\/tr>\n
Como a costura \u00e9 soldada<\/b><\/td>\nA tira\/bobina \u00e9 formada em um tubo, e a costura \u00e9 aquecida e unida por resist\u00eancia el\u00e9trica. Comumente, \u00e9 usada a soldagem por resist\u00eancia de alta frequ\u00eancia.<\/span><\/td>\nAs bordas da chapa (ou bobina) s\u00e3o unidas por meio de um arco el\u00e9trico. Ele derrete\/fusiona a costura, formando uma solda longitudinal.<\/span><\/td>\n<\/tr>\n
Material inicial t\u00edpico<\/b><\/td>\nGeralmente feito de uma tira ou bobina de a\u00e7o que \u00e9 moldada a frio em um tubo \"redondo\" ou \"circular\" antes da soldagem.<\/span><\/td>\nGeralmente feito de uma chapa de a\u00e7o (chapa de qualidade para vasos de press\u00e3o). Ele \u00e9 laminado at\u00e9 ganhar forma antes da soldagem por fus\u00e3o a arco.<\/span><\/td>\n<\/tr>\n
Uso t\u00edpico de espessura de parede<\/b><\/td>\nSCH 5 a SCH 160 (dependendo da aplica\u00e7\u00e3o).<\/span><\/td>\nSCH 10, SCH 40, SCH 80, etc.\u00a0<\/span><\/td>\n<\/tr>\n
Padr\u00f5es do setor\u00a0<\/b><\/td>\nASTM A178<\/span><\/td>\nASTM A672 para tubos EFW de alta press\u00e3o para temperaturas moderadas<\/span><\/td>\n<\/tr>\n
Custo\/lead-time usual (tend\u00eancia de mercado)<\/b><\/td>\nGeralmente, o custo \u00e9 mais baixo e a produ\u00e7\u00e3o \u00e9 mais r\u00e1pida do que o EFW em muitas cadeias de suprimentos (varia de acordo com o tamanho, o grau, os testes e o mercado).<\/span><\/td>\nGeralmente, o custo \u00e9 mais alto\/tempo de espera mais longo do que o ERW para itens compar\u00e1veis (varia de acordo com a especifica\u00e7\u00e3o e a inspe\u00e7\u00e3o necess\u00e1ria).<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Processo de fabrica\u00e7\u00e3o de tubos ERW e EFW<\/h2>\n

\"Processo<\/p>\n

Processo de fabrica\u00e7\u00e3o de tubos ERW<\/b><\/p>\n

No processo ERW, as chapas de metal ou tiras de bobina s\u00e3o formadas a frio. Dando a elas um formato cil\u00edndrico, essas tiras agora ser\u00e3o soldadas por ERW (Electric Resistance Welding, solda por resist\u00eancia el\u00e9trica). Isso envolve o aquecimento das bordas da tira de metal por meio de uma corrente el\u00e9trica de alta (ou baixa) frequ\u00eancia. Em seguida, com o rolo de compress\u00e3o ou matrizes, elas s\u00e3o unidas para formar Tubos ERW<\/a> com costuras longitudinais.<\/span><\/p>\n

Em aplica\u00e7\u00f5es modernas, a soldagem por resist\u00eancia el\u00e9trica de alta frequ\u00eancia \u00e9 a preferida. Ela produz costuras fortes e dur\u00e1veis sem o uso de material de enchimento. Embora o uso de baixa frequ\u00eancia seja poss\u00edvel, v\u00e1rias deformidades podem ser observadas, inclusive a uni\u00e3o inadequada da costura, rachaduras no gancho e corros\u00e3o.<\/span><\/p>\n

Ap\u00f3s a soldagem, as costuras externas podem ser cortadas para torn\u00e1-las indetect\u00e1veis. Ao mesmo tempo, as internas s\u00e3o deixadas como est\u00e3o.<\/span><\/p>\n

Processo de fabrica\u00e7\u00e3o de tubos EFW<\/b><\/p>\n

O processo EFW, tamb\u00e9m conhecido como soldagem a arco ou soldagem por feixe de el\u00e9trons, usa um arco el\u00e9trico para derreter ou comprimir as bordas de metal. Em seguida, elas s\u00e3o fundidas para formar tubos EFW cil\u00edndricos com uma costura longitudinal, como no ERW. Nesse caso, n\u00e3o \u00e9 necess\u00e1ria pressuriza\u00e7\u00e3o, pois as bordas s\u00e3o fundidas e se fundem uniformemente. Entretanto, o EFW pode ou n\u00e3o usar material de enchimento.<\/span><\/p>\n

Especifica\u00e7\u00f5es do tubo ERW<\/h2>\n

\"Especifica\u00e7\u00f5es<\/p>\n

    \n
  • Faixa de tamanho da tubula\u00e7\u00e3o:<\/b> 1\/2\" a 48\"<\/span><\/li>\n
  • Espessura da parede (SCH): <\/b>Dispon\u00edvel em SCH 5 a SCH 160 (dependendo da aplica\u00e7\u00e3o).<\/span><\/li>\n
  • Material usado na fabrica\u00e7\u00e3o: <\/b>a\u00e7o carbono e a\u00e7o inoxid\u00e1vel\u00a0<\/span><\/li>\n
  • Extremidade do tubo: <\/b>Chanfrado, rosqueado ou liso<\/span><\/li>\n
  • Padr\u00f5es do setor: <\/b>ASTM A178<\/span><\/li>\n<\/ul>\n

    Especifica\u00e7\u00f5es do tubo EFW<\/h2>\n

    \"Tubo<\/p>\n

      \n
    • Faixa de tamanho da tubula\u00e7\u00e3o:<\/b> 1\/8\" a 100\" (dependendo das especifica\u00e7\u00f5es da ASTM)<\/span><\/li>\n
    • Espessura da parede (SCH): <\/b>Dispon\u00edvel em SCH 10, 40, 80, etc.<\/span><\/li>\n
    • Material usado na fabrica\u00e7\u00e3o: <\/b>A\u00e7o inoxid\u00e1vel, a\u00e7o carbono e ligas com alto teor de n\u00edquel<\/span><\/li>\n
    • Extremidade do tubo: <\/b>Chanfrado, rosqueado ou liso<\/span><\/li>\n
    • Acabamentos de superf\u00edcie:<\/b> Polido mate, jateado com areia, decapado com HF<\/span><\/li>\n
    • Padr\u00f5es do setor:<\/b><\/li>\n<\/ul>\n

      ASTM A672 para tubos EFW de alta press\u00e3o para temperaturas moderadas<\/span><\/p>\n

      ASTM A691 para tubos EFW de a\u00e7o carbono e liga de alto n\u00edquel para alta temperatura<\/span><\/p>\n

      Vantagens do tubo ERW<\/h2>\n

      Os tubos ERW apresentam as seguintes vantagens:<\/span><\/p>\n

        \n
      • Custo-benef\u00edcio<\/span><\/li>\n
      • Adequado para aplica\u00e7\u00f5es de baixa press\u00e3o<\/span><\/li>\n
      • O processo de fabrica\u00e7\u00e3o produz costuras altamente confi\u00e1veis e robustas<\/span><\/li>\n<\/ul>\n

        Vantagens do tubo EFW<\/h2>\n

        Os tubos EFW apresentam as seguintes vantagens:<\/span><\/p>\n

          \n
        • S\u00e3o tubos de paredes grossas com um di\u00e2metro grande<\/span><\/li>\n
        • Os tubos de alta resist\u00eancia s\u00e3o adequados para aplica\u00e7\u00f5es exigentes<\/span><\/li>\n
        • O processo de soldagem por arco el\u00e9trico produz costuras mais resistentes<\/span><\/li>\n<\/ul>\n

          Em que campos o tubo ERW \u00e9 usado?<\/h2>\n

          Como um m\u00e9todo comumente usado na fabrica\u00e7\u00e3o de tubos soldados, os tubos ERW s\u00e3o amplamente usados em aplica\u00e7\u00f5es de transporte de m\u00eddia. As aplica\u00e7\u00f5es industriais abrangem v\u00e1rios setores. Elas incluem HVAC, encanamento, petr\u00f3leo e g\u00e1s, ind\u00fastria de energia, aeroespacial, supress\u00e3o de inc\u00eandio etc.<\/span><\/p>\n

          Quais s\u00e3o as aplica\u00e7\u00f5es do EFW Pipe?<\/h2>\n

          O EFW, por ser uma alternativa econ\u00f4mica ao m\u00e9todo de fabrica\u00e7\u00e3o de tubos por soldagem, produz tubos com alta resist\u00eancia e resist\u00eancia \u00e0 corros\u00e3o. Os tubos EFW s\u00e3o usados em aplica\u00e7\u00f5es de alta press\u00e3o que exigem toler\u00e2ncias r\u00edgidas. As aplica\u00e7\u00f5es envolvem setores industriais como o qu\u00edmico, o de processamento de alimentos e o petroqu\u00edmico.<\/span><\/p>\n

          Conclus\u00e3o<\/h2>\n

          Tanto o ERW quanto o EFW s\u00e3o tubos soldados e s\u00e3o usados em v\u00e1rios setores industriais. \u00c9 fundamental entender os dois tubos mais comumente usados para garantir a sele\u00e7\u00e3o adequada para o seu projeto. Sempre escolha o tubo depois de avaliar suas necessidades. Selecione de acordo com os requisitos espec\u00edficos da aplica\u00e7\u00e3o. Isso inclui press\u00e3o, fluido que est\u00e1 sendo transportado, temperatura e seu or\u00e7amento.\u00a0<\/span><\/p>","protected":false},"excerpt":{"rendered":"

          As diferen\u00e7as nas variedades de tubos soldados se devem principalmente aos diferentes processos de fabrica\u00e7\u00e3o. No cen\u00e1rio de fabrica\u00e7\u00e3o e soldagem de tubos, dois m\u00e9todos de fabrica\u00e7\u00e3o se destacam: ERW e EFW, produzindo tubos ERW e EFW, respectivamente. Os dois m\u00e9todos podem confundir voc\u00ea devido aos nomes semelhantes e \u00e0 soldagem el\u00e9trica envolvida em ambos os processos de fabrica\u00e7\u00e3o. No entanto,...<\/p>","protected":false},"author":10,"featured_media":6107,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-6095","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nDifference Between ERW and EFW Pipe<\/title>\n<meta name=\"description\" content=\"ERW vs EFW pipes comparison: ERW uses electric resistance welding on steel strips for cost-effective, low-pressure applications; EFW employs electric arc fusion on plates for high-strength, large-diameter, high-pressure uses in demanding industries.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/uniasen.com\/pt\/blog\/diferenca-entre-os-tubos-erw-e-efw\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Difference Between ERW and EFW Pipe\" \/>\n<meta property=\"og:description\" content=\"ERW vs EFW pipes comparison: ERW uses electric resistance welding on steel strips for cost-effective, low-pressure applications; EFW employs electric arc fusion on plates for high-strength, large-diameter, high-pressure uses in demanding industries.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/uniasen.com\/pt\/blog\/diferenca-entre-os-tubos-erw-e-efw\/\" \/>\n<meta property=\"og:site_name\" content=\"UNIASEN\" \/>\n<meta property=\"article:published_time\" content=\"2025-12-22T05:22:21+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-12-24T06:48:27+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/uniasen.com\/wp-content\/uploads\/2025\/12\/ERW-vs-EFW-Steel-Pipes.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1000\" \/>\n\t<meta property=\"og:image:height\" content=\"750\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Fiona\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"Fiona\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. tempo de leitura\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/uniasen.com\/blog\/difference-between-erw-and-efw-pipe\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/uniasen.com\/blog\/difference-between-erw-and-efw-pipe\/\"},\"author\":{\"name\":\"Fiona\",\"@id\":\"https:\/\/uniasen.com\/#\/schema\/person\/10cd4f9f6400879e795a1a9e3f1d5f13\"},\"headline\":\"Difference Between ERW and EFW Pipe\",\"datePublished\":\"2025-12-22T05:22:21+00:00\",\"dateModified\":\"2025-12-24T06:48:27+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/uniasen.com\/blog\/difference-between-erw-and-efw-pipe\/\"},\"wordCount\":821,\"publisher\":{\"@id\":\"https:\/\/uniasen.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/uniasen.com\/blog\/difference-between-erw-and-efw-pipe\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/uniasen.com\/wp-content\/uploads\/2025\/12\/ERW-vs-EFW-Steel-Pipes.webp\",\"articleSection\":[\"Blog\"],\"inLanguage\":\"pt-BR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/uniasen.com\/blog\/difference-between-erw-and-efw-pipe\/\",\"url\":\"https:\/\/uniasen.com\/blog\/difference-between-erw-and-efw-pipe\/\",\"name\":\"Difference Between ERW and EFW Pipe\",\"isPartOf\":{\"@id\":\"https:\/\/uniasen.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/uniasen.com\/blog\/difference-between-erw-and-efw-pipe\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/uniasen.com\/blog\/difference-between-erw-and-efw-pipe\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/uniasen.com\/wp-content\/uploads\/2025\/12\/ERW-vs-EFW-Steel-Pipes.webp\",\"datePublished\":\"2025-12-22T05:22:21+00:00\",\"dateModified\":\"2025-12-24T06:48:27+00:00\",\"description\":\"ERW vs EFW pipes comparison: ERW uses electric resistance welding on steel strips for cost-effective, low-pressure applications; 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