{"id":6273,"date":"2020-07-31T02:54:22","date_gmt":"2020-07-31T02:54:22","guid":{"rendered":"https:\/\/www.kaysuns.com\/?p=6273"},"modified":"2026-01-12T05:41:42","modified_gmt":"2026-01-12T05:41:42","slug":"tubo-de-aco-inoxidavel-duplex-usado-no-sistema-de-agua-de-resfriamento-de-energia-nuclear","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/pt\/blog\/tubo-de-aco-inoxidavel-duplex-usado-no-sistema-de-agua-de-resfriamento-de-energia-nuclear\/","title":{"rendered":"Tubo de a\u00e7o inoxid\u00e1vel duplex usado no sistema de \u00e1gua de resfriamento de energia nuclear"},"content":{"rendered":"<h2 class=\"wp-block-heading\"><strong>Tubo de a\u00e7o inoxid\u00e1vel duplex para energia nuclear<\/strong> Sistema de \u00e1gua de resfriamento<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Como uma energia limpa, a energia nuclear \u00e9 um grande contribuinte para a redu\u00e7\u00e3o global das emiss\u00f5es de carbono e pode desempenhar um papel mais importante no futuro. Tubo duplex de a\u00e7o inoxid\u00e1vel para sistema de \u00e1gua de resfriamento \u00e9 o futuro.<\/p>\n<\/blockquote>\n\n\n\n<p>O fator chave para a opera\u00e7\u00e3o segura de usinas nucleares \u00e9 o sistema de tubula\u00e7\u00e3o de \u00e1gua de resfriamento. Este complexo sistema cont\u00e9m milhares de metros de tubos com di\u00e2metros variando de grande a pequeno, e sua fun\u00e7\u00e3o \u00e9 fornecer abastecimento de \u00e1gua confi\u00e1vel para o resfriamento de equipamentos de usinas nucleares.<\/p>\n\n\n\n<p>Geralmente, h\u00e1 um sistema operacional com n\u00edvel de seguran\u00e7a e um sistema de emerg\u00eancia com n\u00edvel de seguran\u00e7a. Os sistemas de tubula\u00e7\u00e3o n\u00e3o seguros devem fornecer \u00e1gua de resfriamento suficiente para o resfriamento normal do equipamento de energia nuclear. O sistema de n\u00edvel de seguran\u00e7a deve fornecer \u00e1gua de resfriamento suficiente para manter o reator sob controle e desligar com seguran\u00e7a em caso de emerg\u00eancia. Os materiais da tubula\u00e7\u00e3o usados nesses sistemas devem ser resistentes \u00e0 corros\u00e3o por \u00e1gua de resfriamento durante toda a vida \u00fatil do equipamento.<\/p>\n\n\n\n<p>Dependendo da localiza\u00e7\u00e3o da usina nuclear, os tipos de \u00e1gua de resfriamento variam de \u00e1gua doce relativamente limpa a \u00e1gua do mar polu\u00edda. Portanto, o grau de corros\u00e3o dos materiais da tubula\u00e7\u00e3o varia muito. A experi\u00eancia mostra que, \u00e0 medida que o sistema envelhece, podem ocorrer v\u00e1rios problemas de corros\u00e3o. Se n\u00e3o for resolvido, isso causar\u00e1 danos ao sistema e impedir\u00e1 que ele forne\u00e7a a \u00e1gua de resfriamento necess\u00e1ria.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Materiais e problemas do sistema de \u00e1gua de resfriamento<\/strong><\/h3>\n\n\n\n<p>O vazamento causado por incrusta\u00e7\u00e3o (bloqueio) e corros\u00e3o do sistema de tubula\u00e7\u00e3o de \u00e1gua de resfriamento \u00e9 o problema mais comum. As seguintes condi\u00e7\u00f5es geralmente levam \u00e0 incrusta\u00e7\u00e3o: ac\u00famulo de sedimentos, organismos marinhos (bioincrusta\u00e7\u00e3o), ac\u00famulo de produtos de corros\u00e3o e entupimento de corpos estranhos. <\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"253\" height=\"221\" src=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/Scaling-inside-carbon-steel-pipes.jpg\" alt=\"Dimensionamento dentro de tubos de a\u00e7o carbono\" class=\"wp-image-6274\"\/><figcaption class=\"wp-element-caption\">Dimensionamento dentro de tubos de a\u00e7o carbono<\/figcaption><\/figure>\n<\/div>\n\n\n<p>Os problemas de vazamento s\u00e3o geralmente causados por corros\u00e3o microbiol\u00f3gica (MIC). MIC \u00e9 uma forma muito agressiva de corros\u00e3o causada por certos microorganismos na \u00e1gua. O a\u00e7o carbono e o a\u00e7o inoxid\u00e1vel de baixa liga freq\u00fcentemente sofrem essa forma de corros\u00e3o.<\/p>\n\n\n\n<p>A maioria das usinas nucleares em opera\u00e7\u00e3o na Am\u00e9rica do Norte usava sistemas de tubula\u00e7\u00e3o de a\u00e7o carbono, \u00e0s vezes revestidos ou revestidos com cimento ou borracha. Devido a problemas de confiabilidade, o monitoramento cont\u00ednuo \u00e9 necess\u00e1rio e os custos de manuten\u00e7\u00e3o s\u00e3o altos.<\/p>\n\n\n\n<p>Como resultado, muitas unidades substitu\u00edram os tubos de a\u00e7o carbono por materiais mais resistentes \u00e0 corros\u00e3o. A fim de cumprir a vida \u00fatil do projeto da nova usina nuclear de mais de 60 anos, o uso de materiais de melhor desempenho ser\u00e1 considerado.<\/p>\n\n\n\n<p>O a\u00e7o inoxid\u00e1vel sempre foi considerado uma op\u00e7\u00e3o vi\u00e1vel para construir novos sistemas de tubula\u00e7\u00e3o de abastecimento de \u00e1gua e reparar ou substituir os sistemas existentes de a\u00e7o carbono.<\/p>\n\n\n\n<p>O a\u00e7o inoxid\u00e1vel comumente usado no programa de atualiza\u00e7\u00e3o do duto \u00e9 o a\u00e7o inoxid\u00e1vel 304L, 316L ou 6% Mo. A diferen\u00e7a de desempenho e pre\u00e7o entre o a\u00e7o inoxid\u00e1vel 316L e 6% Mo \u00e9 grande.<\/p>\n\n\n\n<p>Se o meio de resfriamento for \u00e1gua n\u00e3o tratada, que \u00e9 altamente corrosiva e apresenta risco de corros\u00e3o microbiana, 304L e 316L n\u00e3o s\u00e3o escolhas adequadas.<\/p>\n\n\n\n<p>Portanto, as usinas nucleares precisam ser atualizadas para o a\u00e7o inoxid\u00e1vel 6% Mo ou aceitar os altos custos de manuten\u00e7\u00e3o dos sistemas de a\u00e7o carbono. Algumas usinas nucleares ainda usam tubos revestidos de a\u00e7o carbono por causa dos custos iniciais mais baixos.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"645\" height=\"147\" src=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/The-chemical-composition-range-of-stainless-steel-commonly-used-in-industrial-water-supply-piping-systems.jpg\" alt=\"A faixa de composi\u00e7\u00e3o qu\u00edmica do a\u00e7o inoxid\u00e1vel comumente usada em sistemas de tubula\u00e7\u00e3o de abastecimento de \u00e1gua industrial\" class=\"wp-image-6275\" srcset=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/The-chemical-composition-range-of-stainless-steel-commonly-used-in-industrial-water-supply-piping-systems.jpg 645w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/The-chemical-composition-range-of-stainless-steel-commonly-used-in-industrial-water-supply-piping-systems-300x68.jpg 300w\" sizes=\"(max-width: 645px) 100vw, 645px\" \/><figcaption class=\"wp-element-caption\">A faixa de composi\u00e7\u00e3o qu\u00edmica do a\u00e7o inoxid\u00e1vel comumente usada em sistemas de tubula\u00e7\u00e3o de abastecimento de \u00e1gua industrial<\/figcaption><\/figure>\n<\/div>\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>2205 duplex de a\u00e7o inoxid\u00e1vel provou ser uma boa escolha<\/strong><\/h3>\n\n\n\n<p>A Usina Nuclear Catawba da Duke Energy na Carolina do Sul, EUA, \u00e9 a primeira usina nuclear a usar <a href=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2019\/07\/DUPLEX-STAINLESS-STEEL-2205.pdf\" target=\"_blank\">duplex 2205<\/a> (<a href=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2019\/07\/DUPLEX-STAINLESS-STEEL-2205.pdf\" target=\"_blank\">UNS S32205<\/a>) a\u00e7o inoxid\u00e1vel duplex em seu sistema.<\/p>\n\n\n\n<p>Esta nota de <a href=\"https:\/\/www.kaysuns.com\/pt\/\" target=\"_blank\">fornecedor de acess\u00f3rios para tubos de a\u00e7o inoxid\u00e1vel<\/a> cont\u00e9m cerca de 3,2% molibd\u00eanio, o que melhora a resist\u00eancia \u00e0 corros\u00e3o e \u00e9 significativamente melhor do que o a\u00e7o inoxid\u00e1vel 304L e 316L.<\/p>\n\n\n\n<p>O sistema de tubula\u00e7\u00e3o que transporta a \u00e1gua de reposi\u00e7\u00e3o para a torre de resfriamento do condensador principal. Os tubos revestidos de a\u00e7o carbono acima do solo s\u00e3o substitu\u00eddos por 2205 <a href=\"https:\/\/www.kaysuns.com\/pt\/duplex-2205-stainless-steel-pipe\/\" target=\"_blank\">tubos de a\u00e7o inoxid\u00e1vel duplex<\/a>.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"564\" height=\"314\" src=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/Large-diameter-2205-duplex-stainless-steel-pipe-installed-in-nuclear-power-plant.jpg\" alt=\"Tubo de a\u00e7o inoxid\u00e1vel duplex 2205 de grande di\u00e2metro instalado em usina nuclear\" class=\"wp-image-6276\" srcset=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/Large-diameter-2205-duplex-stainless-steel-pipe-installed-in-nuclear-power-plant.jpg 564w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/Large-diameter-2205-duplex-stainless-steel-pipe-installed-in-nuclear-power-plant-300x167.jpg 300w\" sizes=\"(max-width: 564px) 100vw, 564px\" \/><figcaption class=\"wp-element-caption\">Tubo de a\u00e7o inoxid\u00e1vel duplex 2205 de grande di\u00e2metro instalado em usina nuclear<\/figcaption><\/figure>\n<\/div>\n\n\n<p>Depois que o duto foi usado por 500 dias, o sistema foi completamente inspecionado. Durante a inspe\u00e7\u00e3o, n\u00e3o foram encontrados sinais de incrusta\u00e7\u00e3o ou corros\u00e3o. O desempenho do a\u00e7o inoxid\u00e1vel 2205 duplex \u00e9 muito bom.<\/p>\n\n\n\n<p>Por mais de dez anos, desde a instala\u00e7\u00e3o, 2205 tubos de a\u00e7o inoxid\u00e1vel t\u00eam apresentado um bom desempenho. Com base nessa experi\u00eancia, a Duke Energy usou tubula\u00e7\u00e3o de a\u00e7o inoxid\u00e1vel duplex 2205 em outras partes de seu sistema.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"424\" height=\"252\" src=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/Internal-corrosion-of-2205-pipeline-after-500-days.jpg\" alt=\"Corros\u00e3o interna de 2205 oleoduto ap\u00f3s 500 dias\" class=\"wp-image-6277\" srcset=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/Internal-corrosion-of-2205-pipeline-after-500-days.jpg 424w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/Internal-corrosion-of-2205-pipeline-after-500-days-300x178.jpg 300w\" sizes=\"(max-width: 424px) 100vw, 424px\" \/><figcaption class=\"wp-element-caption\">Corros\u00e3o interna de 2205 oleoduto ap\u00f3s 500 dias<\/figcaption><\/figure>\n<\/div>\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p>Agora, h\u00e1 mais uma escolha em tubo duplex de a\u00e7o inoxid\u00e1vel para sistema de \u00e1gua de resfriamento. A aplica\u00e7\u00e3o bem-sucedida do a\u00e7o inoxid\u00e1vel duplex pode reduzir os custos de manuten\u00e7\u00e3o, reduzir o tempo de inatividade e garantir a opera\u00e7\u00e3o segura das usinas nucleares.<\/p>","protected":false},"featured_media":45345,"template":"","categories":[186],"tags":[],"class_list":["post-6273","blog","type-blog","status-publish","has-post-thumbnail","hentry","category-stainless-steel-knowledge"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Duplex Stainless Steel Pipe for Cooling Water System of Nuclear Power<\/title>\n<meta name=\"description\" content=\"The cooling water system is an indispensable part of nuclear power and provides market opportunities for the application of duplex stainless steel pipe.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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