{"id":2536,"date":"2026-09-06T00:35:29","date_gmt":"2026-09-05T17:35:29","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/inox-duplex-la-gi-cau-truc-uu-diem-mac-tieu-bieu-ung-dung\/"},"modified":"2026-09-06T00:35:29","modified_gmt":"2026-09-05T17:35:29","slug":"inox-duplex-la-gi-cau-truc-uu-diem-mac-tieu-bieu-ung-dung","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/inox-duplex-la-gi-cau-truc-uu-diem-mac-tieu-bieu-ung-dung\/","title":{"rendered":"Inox Duplex l\u00e0 g\u00ec? C\u1ea5u tr\u00fac, \u01b0u \u0111i\u1ec3m, m\u00e1c ti\u00eau bi\u1ec3u &#038; \u1ee9ng d\u1ee5ng"},"content":{"rendered":"\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-left kksr-valign-top\"\n    data-payload='{&quot;align&quot;:&quot;left&quot;,&quot;id&quot;:&quot;2536&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;top&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;0&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;0&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;\u0110\u00e1nh gi\u00e1&quot;,&quot;legend&quot;:&quot;0\\\/5 - (0 b\u00ecnh ch\u1ecdn)&quot;,&quot;size&quot;:&quot;24&quot;,&quot;title&quot;:&quot;Inox Duplex l\u00e0 g\u00ec? C\u1ea5u tr\u00fac, \u01b0u \u0111i\u1ec3m, m\u00e1c ti\u00eau bi\u1ec3u \\u0026amp; \u1ee9ng d\u1ee5ng&quot;,&quot;width&quot;:&quot;0&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 0px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            <span class=\"kksr-muted\">\u0110\u00e1nh gi\u00e1<\/span>\n    <\/div>\n    <\/div>\n<div class=\"custom-toc\">\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/inoxcuongthinh.com\/inox-duplex-la-gi-cau-truc-uu-diem-mac-tieu-bieu-ung-dung\/#Noi_dung_chinh\" >N\u1ed9i dung ch\u00ednh<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/inoxcuongthinh.com\/inox-duplex-la-gi-cau-truc-uu-diem-mac-tieu-bieu-ung-dung\/#Inox_Duplex_la_gi_Vi_sao_goi_la_%E2%80%9Cket_hop_suc_manh_hai_ho_Inox%E2%80%9D\" >Inox Duplex l\u00e0 g\u00ec? V\u00ec sao g\u1ecdi l\u00e0 \u201ck\u1ebft h\u1ee3p s\u1ee9c m\u1ea1nh hai h\u1ecd Inox\u201d<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/inoxcuongthinh.com\/inox-duplex-la-gi-cau-truc-uu-diem-mac-tieu-bieu-ung-dung\/#Cac_ho_va_mac_Duplex_tieu_bieu\" >C\u00e1c h\u1ecd v\u00e0 m\u00e1c Duplex ti\u00eau bi\u1ec3u<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/inoxcuongthinh.com\/inox-duplex-la-gi-cau-truc-uu-diem-mac-tieu-bieu-ung-dung\/#Phan_hang_theo_kha_nang_chong_ro_PREN\" >Ph\u00e2n h\u1ea1ng theo kh\u1ea3 n\u0103ng ch\u1ed1ng r\u1ed7 (PREN)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/inoxcuongthinh.com\/inox-duplex-la-gi-cau-truc-uu-diem-mac-tieu-bieu-ung-dung\/#Mac_pho_bien_va_thanh_phan_dien_hinh\" >M\u00e1c ph\u1ed5 bi\u1ebfn v\u00e0 th\u00e0nh ph\u1ea7n \u0111i\u1ec3n h\u00ecnh<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/inoxcuongthinh.com\/inox-duplex-la-gi-cau-truc-uu-diem-mac-tieu-bieu-ung-dung\/#Tinh_chat_co_hoc_va_chong_an_mon_so_voi_304316\" >T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc v\u00e0 ch\u1ed1ng \u0103n m\u00f2n: so v\u1edbi 304\/316<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/inoxcuongthinh.com\/inox-duplex-la-gi-cau-truc-uu-diem-mac-tieu-bieu-ung-dung\/#Tieu_chuan_san_pham_va_ky_hieu_can_biet\" >Ti\u00eau chu\u1ea9n s\u1ea3n ph\u1ea9m v\u00e0 k\u00fd hi\u1ec7u c\u1ea7n bi\u1ebft<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/inoxcuongthinh.com\/inox-duplex-la-gi-cau-truc-uu-diem-mac-tieu-bieu-ung-dung\/#Gia_cong_tao_hinh_va_luu_y_ky_thuat\" >Gia c\u00f4ng, t\u1ea1o h\u00ecnh v\u00e0 l\u01b0u \u00fd k\u1ef9 thu\u1eadt<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/inoxcuongthinh.com\/inox-duplex-la-gi-cau-truc-uu-diem-mac-tieu-bieu-ung-dung\/#Cat_chan_gia_cong_cat_got\" >C\u1eaft, ch\u1ea5n, gia c\u00f4ng c\u1eaft g\u1ecdt<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/inoxcuongthinh.com\/inox-duplex-la-gi-cau-truc-uu-diem-mac-tieu-bieu-ung-dung\/#Han_Duplex_thuc_hanh_tot\" >H\u00e0n Duplex: th\u1ef1c h\u00e0nh t\u1ed1t<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/inoxcuongthinh.com\/inox-duplex-la-gi-cau-truc-uu-diem-mac-tieu-bieu-ung-dung\/#Lua_chon_mac_Duplex_theo_moi_truong_Viet_Nam\" >L\u1ef1a ch\u1ecdn m\u00e1c Duplex theo m\u00f4i tr\u01b0\u1eddng Vi\u1ec7t Nam<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/inoxcuongthinh.com\/inox-duplex-la-gi-cau-truc-uu-diem-mac-tieu-bieu-ung-dung\/#Ung_dung_tieu_bieu_tai_Viet_Nam\" >\u1ee8ng d\u1ee5ng ti\u00eau bi\u1ec3u t\u1ea1i Vi\u1ec7t Nam<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/inoxcuongthinh.com\/inox-duplex-la-gi-cau-truc-uu-diem-mac-tieu-bieu-ung-dung\/#Thiet_ke_va_lap_dat_nhung_luu_y_de_song_khoe_voi_Cl\" >Thi\u1ebft k\u1ebf v\u00e0 l\u1eafp \u0111\u1eb7t: nh\u1eefng l\u01b0u \u00fd \u0111\u1ec3 s\u1ed1ng kh\u1ecfe v\u1edbi Cl-<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/inoxcuongthinh.com\/inox-duplex-la-gi-cau-truc-uu-diem-mac-tieu-bieu-ung-dung\/#Kinh_te_vong_doi_LCC_vi_sao_Duplex_thuong_%E2%80%9Cre_hon_ve_lau_dai%E2%80%9D\" >Kinh t\u1ebf v\u00f2ng \u0111\u1eddi (LCC): v\u00ec sao Duplex th\u01b0\u1eddng \u201cr\u1ebb h\u01a1n v\u1ec1 l\u00e2u d\u00e0i\u201d<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/inoxcuongthinh.com\/inox-duplex-la-gi-cau-truc-uu-diem-mac-tieu-bieu-ung-dung\/#Chuoi_cung_ung_va_kiem_soat_chat_luong_tai_Viet_Nam\" >Chu\u1ed7i cung \u1ee9ng v\u00e0 ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng t\u1ea1i Vi\u1ec7t Nam<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/inoxcuongthinh.com\/inox-duplex-la-gi-cau-truc-uu-diem-mac-tieu-bieu-ung-dung\/#Cau_hoi_thuong_gap\" >C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/inoxcuongthinh.com\/inox-duplex-la-gi-cau-truc-uu-diem-mac-tieu-bieu-ung-dung\/#Nguon_tham_khao\" >Ngu\u1ed3n tham kh\u1ea3o<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/inoxcuongthinh.com\/inox-duplex-la-gi-cau-truc-uu-diem-mac-tieu-bieu-ung-dung\/#Ket_luan\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<h3><span class=\"ez-toc-section\" id=\"Noi_dung_chinh\"><\/span>N\u1ed9i dung ch\u00ednh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><a href=\"#toc-0-inox-duplex-la-gi-vi-sao-goi-la-ket-hop-suc-manh-h\">Inox Duplex l\u00e0 g\u00ec? V\u00ec sao g\u1ecdi l\u00e0 \u201ck\u1ebft h\u1ee3p s\u1ee9c m\u1ea1nh hai h\u1ecd Inox\u201d<\/a><\/li>\n<li><a href=\"#toc-1-cac-ho-va-mac-duplex-tieu-bieu\">C\u00e1c h\u1ecd v\u00e0 m\u00e1c Duplex ti\u00eau bi\u1ec3u<\/a><\/li>\n<li><a href=\"#toc-2-tinh-chat-co-hoc-va-chong-an-mon-so-voi-304316\">T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc v\u00e0 ch\u1ed1ng \u0103n m\u00f2n: so v\u1edbi 304\/316<\/a><\/li>\n<li><a href=\"#toc-3-tieu-chuan-san-pham-va-ky-hieu-can-biet\">Ti\u00eau chu\u1ea9n s\u1ea3n ph\u1ea9m v\u00e0 k\u00fd hi\u1ec7u c\u1ea7n bi\u1ebft<\/a><\/li>\n<li><a href=\"#toc-4-gia-cong-tao-hinh-va-luu-y-ky-thuat\">Gia c\u00f4ng, t\u1ea1o h\u00ecnh v\u00e0 l\u01b0u \u00fd k\u1ef9 thu\u1eadt<\/a><\/li>\n<li><a href=\"#toc-5-lua-chon-mac-duplex-theo-moi-truong-viet-nam\">L\u1ef1a ch\u1ecdn m\u00e1c Duplex theo m\u00f4i tr\u01b0\u1eddng Vi\u1ec7t Nam<\/a><\/li>\n<li><a href=\"#toc-6-ung-dung-tieu-bieu-tai-viet-nam\">\u1ee8ng d\u1ee5ng ti\u00eau bi\u1ec3u t\u1ea1i Vi\u1ec7t Nam<\/a><\/li>\n<li><a href=\"#toc-7-thiet-ke-va-lap-dat-nhung-luu-y-de-song-khoe-voi-c\">Thi\u1ebft k\u1ebf v\u00e0 l\u1eafp \u0111\u1eb7t: nh\u1eefng l\u01b0u \u00fd \u0111\u1ec3 s\u1ed1ng kh\u1ecfe v\u1edbi Cl-<\/a><\/li>\n<li><a href=\"#toc-8-kinh-te-vong-doi-lcc-vi-sao-duplex-thuong-re-hon-v\">Kinh t\u1ebf v\u00f2ng \u0111\u1eddi (LCC): v\u00ec sao Duplex th\u01b0\u1eddng \u201cr\u1ebb h\u01a1n v\u1ec1 l\u00e2u d\u00e0i\u201d<\/a><\/li>\n<li><a href=\"#toc-9-chuoi-cung-ung-va-kiem-soat-chat-luong-tai-viet-na\">Chu\u1ed7i cung \u1ee9ng v\u00e0 ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng t\u1ea1i Vi\u1ec7t Nam<\/a><\/li>\n<li><a href=\"#toc-10-cau-hoi-thuong-gap\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/a><\/li>\n<li><a href=\"#toc-11-nguon-tham-khao\">Ngu\u1ed3n tham kh\u1ea3o<\/a><\/li>\n<li><a href=\"#toc-12-ket-luan\">K\u1ebft lu\u1eadn<\/a><\/li>\n<\/ul>\n<\/div>\n<p>Inox Duplex l\u00e0 nh\u00f3m th\u00e9p kh\u00f4ng g\u1ec9 c\u00f3 vi c\u1ea5u tr\u00fac hai pha (austenite + ferrite) g\u1ea7n c\u00e2n b\u1eb1ng, k\u1ebft h\u1ee3p \u0111\u1ed9 b\u1ec1n cao c\u1ee7a h\u1ecd ferritic v\u1edbi \u0111\u1ed9 d\u1ebbo dai v\u00e0 kh\u1ea3 n\u0103ng gia c\u00f4ng\/h\u00e0n t\u1ed1t c\u1ee7a h\u1ecd austenitic. \u0110\u00e2y l\u00e0 c\u00e2u tr\u1ea3 l\u1eddi t\u1ed1i \u01b0u khi 304\/316 kh\u00f4ng \u0111\u1ee7 ch\u1ecbu m\u1ecfi ho\u1eb7c ch\u1ed1ng \u0103n m\u00f2n clorua trong m\u00f4i tr\u01b0\u1eddng ven bi\u1ec3n, n\u01b0\u1edbc bi\u1ec3n, h\u00f3a ch\u1ea5t. B\u00e0i vi\u1ebft ph\u00e2n t\u00edch chi ti\u1ebft b\u1ea3n ch\u1ea5t, m\u00e1c Duplex ph\u1ed5 bi\u1ebfn, ti\u00eau chu\u1ea9n, gia c\u00f4ng h\u00e0n, \u1ee9ng d\u1ee5ng t\u1ea1i Vi\u1ec7t Nam v\u00e0 c\u00e1ch ch\u1ecdn m\u00e1c theo m\u00f4i tr\u01b0\u1eddng.<\/p>\n<h2 id=\"toc-0-inox-duplex-la-gi-vi-sao-goi-la-ket-hop-suc-manh-h\"><span class=\"ez-toc-section\" id=\"Inox_Duplex_la_gi_Vi_sao_goi_la_%E2%80%9Cket_hop_suc_manh_hai_ho_Inox%E2%80%9D\"><\/span>Inox Duplex l\u00e0 g\u00ec? V\u00ec sao g\u1ecdi l\u00e0 \u201ck\u1ebft h\u1ee3p s\u1ee9c m\u1ea1nh hai h\u1ecd Inox\u201d<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; Vi c\u1ea5u tr\u00fac: H\u1ed7n h\u1ee3p kho\u1ea3ng 40\u201360% ferrite v\u00e0 60\u201340% austenite, t\u1ea1o n\u00ean \u201chai pha\u201d \u1ed5n \u0111\u1ecbnh \u1edf nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng sau khi luy\u1ec7n\/\u1ee7 dung d\u1ecbch v\u00e0 l\u00e0m ngu\u1ed9i nhanh.<br \/>\n&#8211; \u0110i\u1ec3m m\u1ea1nh k\u1ebf th\u1eeba:<br \/>\n  &#8211; T\u1eeb ferritic: gi\u1edbi h\u1ea1n ch\u1ea3y cao, \u0111\u1ed9 b\u1ec1n m\u1ecfi, ch\u1ed1ng n\u1ee9t \u0103n m\u00f2n do \u1ee9ng su\u1ea5t trong m\u00f4i tr\u01b0\u1eddng clorua (SCC) r\u1ea5t t\u1ed1t.<br \/>\n  &#8211; T\u1eeb austenitic: \u0111\u1ed9 dai va \u0111\u1eadp t\u1ed1t, d\u1ec5 h\u00e0n h\u01a1n ferritic, kh\u1ea3 n\u0103ng ch\u1ecbu \u0103n m\u00f2n t\u1ed5ng qu\u00e1t t\u1ed1t.<br \/>\n&#8211; K\u1ebft qu\u1ea3: c\u00f9ng c\u1ea5p \u00e1p l\u1ef1c, c\u00f3 th\u1ec3 gi\u1ea3m chi\u1ec1u d\u00e0y 20\u201340% so v\u1edbi 316L nh\u1edd gi\u1edbi h\u1ea1n ch\u1ea3y cao h\u01a1n, \u0111\u1ed3ng th\u1eddi t\u0103ng tu\u1ed5i th\u1ecd trong m\u00f4i tr\u01b0\u1eddng ch\u1ee9a Cl-.<\/p>\n<h2 id=\"toc-1-cac-ho-va-mac-duplex-tieu-bieu\"><span class=\"ez-toc-section\" id=\"Cac_ho_va_mac_Duplex_tieu_bieu\"><\/span>C\u00e1c h\u1ecd v\u00e0 m\u00e1c Duplex ti\u00eau bi\u1ec3u<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Phan_hang_theo_kha_nang_chong_ro_PREN\"><\/span>Ph\u00e2n h\u1ea1ng theo kh\u1ea3 n\u0103ng ch\u1ed1ng r\u1ed7 (PREN)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; PREN (Pitting Resistance Equivalent Number) \u2248 %Cr + 3.3\u00d7%Mo + 16\u00d7%N. PREN c\u00e0ng cao, ch\u1ed1ng r\u1ed7\/\u0103n k\u1ebd c\u00e0ng t\u1ed1t trong m\u00f4i tr\u01b0\u1eddng clorua.<br \/>\n&#8211; Nh\u00f3m ch\u00ednh:<br \/>\n  &#8211; Lean Duplex: PREN ~24\u201328 (v\u00ed d\u1ee5 2304, 2101) \u2013 thay th\u1ebf 304\/316 trong m\u00f4i tr\u01b0\u1eddng clorua v\u1eeba.<br \/>\n  &#8211; Duplex chu\u1ea9n: PREN ~32\u201336 (2205) \u2013 l\u1ef1a ch\u1ecdn \u201cchu\u1ea9n\u201d cho nhi\u1ec1u \u1ee9ng d\u1ee5ng n\u01b0\u1edbc l\u1ee3\/ven bi\u1ec3n.<br \/>\n  &#8211; Super Duplex: PREN \u226540 (2507, S32750\/S32760) \u2013 cho n\u01b0\u1edbc bi\u1ec3n t\u1ef1 nhi\u00ean, d\u1ea7u kh\u00ed bi\u1ec3n.<br \/>\n  &#8211; Hyper Duplex: PREN ~49\u201352 (\u00edt ph\u1ed5 bi\u1ebfn, d\u1ef1 \u00e1n \u0111\u1eb7c th\u00f9).<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Mac_pho_bien_va_thanh_phan_dien_hinh\"><\/span>M\u00e1c ph\u1ed5 bi\u1ebfn v\u00e0 th\u00e0nh ph\u1ea7n \u0111i\u1ec3n h\u00ecnh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; 2304 (UNS S32304, EN 1.4362): ~23%Cr, ~4%Ni, N~0.1%, kh\u00f4ng\/\u00edt Mo; PREN ~26\u201327. Thay th\u1ebf 316L trong b\u1ec3 n\u01b0\u1edbc mu\u1ed1i nh\u1eb9, c\u00f4ng tr\u00ecnh ven bi\u1ec3n \u0111\u00f4 th\u1ecb.<br \/>\n&#8211; 2205 (UNS S32205\/S31803, EN 1.4462): ~22%Cr, 5\u20136%Ni, ~3%Mo, N~0.15\u20130.20%; PREN ~34\u201336. C\u00e2n b\u1eb1ng t\u1ed1i \u01b0u gi\u1eefa b\u1ec1n c\u01a1 h\u1ecdc v\u00e0 kh\u00e1ng Cl-.<br \/>\n&#8211; 2507 (UNS S32750\/S32760, EN 1.4410): ~25%Cr, ~7%Ni, ~4%Mo, N~0.25\u20130.30%; PREN ~41\u201345. D\u00e0nh cho n\u01b0\u1edbc bi\u1ec3n t\u1ef1 nhi\u00ean, d\u1ea7u kh\u00ed sour, RO intake.<\/p>\n<h2 id=\"toc-2-tinh-chat-co-hoc-va-chong-an-mon-so-voi-304316\"><span class=\"ez-toc-section\" id=\"Tinh_chat_co_hoc_va_chong_an_mon_so_voi_304316\"><\/span>T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc v\u00e0 ch\u1ed1ng \u0103n m\u00f2n: so v\u1edbi 304\/316<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; C\u01a1 t\u00ednh (\u0111i\u1ec3n h\u00ecnh \u1edf 2205 theo ASTM\/EN):<br \/>\n  &#8211; Gi\u1edbi h\u1ea1n ch\u1ea3y Rp0.2: ~450\u2013550 MPa (316L: ~200\u2013240 MPa).<br \/>\n  &#8211; \u0110\u1ed9 b\u1ec1n k\u00e9o: ~620\u2013800 MPa; \u0111\u1ed9 gi\u00e3n d\u00e0i ~25\u201330%.<br \/>\n  &#8211; \u0110\u1ed9 dai va \u0111\u1eadp t\u1ed1t \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 \u00e2m (v\u01b0\u1ee3t ferritic, x\u1ea5p x\u1ec9 austenitic ch\u1ea5t l\u01b0\u1ee3ng).<br \/>\n&#8211; Ch\u1ed1ng \u0103n m\u00f2n:<br \/>\n  &#8211; R\u1ed7\/k\u1ebd (pitting\/crevice): 2205 v\u01b0\u1ee3t tr\u1ed9i 316L trong dung d\u1ecbch Cl-; 2507 l\u00e0m vi\u1ec7c tin c\u1eady trong n\u01b0\u1edbc bi\u1ec3n t\u1ef1 nhi\u00ean.<br \/>\n  &#8211; SCC (stress corrosion cracking): Duplex kh\u00e1ng SCC clorua cao h\u01a1n r\u00f5 r\u1ec7t so v\u1edbi austenitic 304\/316 \u1edf ~60\u2013100\u00b0C.<br \/>\n  &#8211; \u0102n m\u00f2n t\u1ed5ng qu\u00e1t: t\u1ed1t trong nhi\u1ec1u m\u00f4i tr\u01b0\u1eddng axit y\u1ebfu\u2013v\u1eeba; c\u1ea7n t\u01b0 v\u1ea5n chi ti\u1ebft cho m\u00f4i tr\u01b0\u1eddng axit m\u1ea1nh, kh\u1eed, hay c\u00f3 halogen\/h\u1ee3p ch\u1ea5t H2S.<\/p>\n<h2 id=\"toc-3-tieu-chuan-san-pham-va-ky-hieu-can-biet\"><span class=\"ez-toc-section\" id=\"Tieu_chuan_san_pham_va_ky_hieu_can_biet\"><\/span>Ti\u00eau chu\u1ea9n s\u1ea3n ph\u1ea9m v\u00e0 k\u00fd hi\u1ec7u c\u1ea7n bi\u1ebft<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; T\u1ea5m\/cu\u1ed9n: ASTM A240 \/ ASME SA-240; EN 10088.<br \/>\n&#8211; \u1ed0ng h\u00e0n\/li\u1ec1n m\u1ea1ch: ASTM A790\/A789 (\u1ed1ng), ASTM A928 (\u1ed1ng h\u00e0n c\u1ee1 l\u1edbn).<br \/>\n&#8211; Thanh\/tr\u00f2n \u0111\u1eb7c: ASTM A276\/A479.<br \/>\n&#8211; M\u1eb7t b\u00edch\/khu\u00f4n r\u00e8n: ASTM A182 \/ ASME SA-182.<br \/>\n&#8211; Ph\u1ee5 ki\u1ec7n \u0111\u01b0\u1eddng \u1ed1ng: ASTM A815.<br \/>\n&#8211; D\u1ecbch v\u1ee5 d\u1ea7u kh\u00ed chua: NACE MR0175 \/ ISO 15156 (x\u00e1c nh\u1eadn \u0111i\u1ec1u ki\u1ec7n s\u1eed d\u1ee5ng t\u00f9y m\u00e1c v\u00e0 tr\u1ea1ng th\u00e1i nhi\u1ec7t luy\u1ec7n).<br \/>\n&#8211; K\u00fd hi\u1ec7u UNS\/EN: 2304 (S32304\/1.4362), 2205 (S32205\/1.4462), 2507 (S32750\/1.4410).<\/p>\n<h2 id=\"toc-4-gia-cong-tao-hinh-va-luu-y-ky-thuat\"><span class=\"ez-toc-section\" id=\"Gia_cong_tao_hinh_va_luu_y_ky_thuat\"><\/span>Gia c\u00f4ng, t\u1ea1o h\u00ecnh v\u00e0 l\u01b0u \u00fd k\u1ef9 thu\u1eadt<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Cat_chan_gia_cong_cat_got\"><\/span>C\u1eaft, ch\u1ea5n, gia c\u00f4ng c\u1eaft g\u1ecdt<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; \u0110\u1ed9 b\u1ec1n cao \u2192 l\u1ef1c ch\u1ea5n l\u1edbn h\u01a1n 304\/316, t\u0103ng b\u00e1n k\u00ednh u\u1ed1n t\u1ed1i thi\u1ec3u, ki\u1ec3m so\u00e1t springback.<br \/>\n&#8211; D\u1ee5ng c\u1ee5 c\u1eaft h\u1ee3p kim c\u1ee9ng, t\u1ed1c \u0111\u1ed9 c\u1eaft th\u1ea5p h\u01a1n 304\/316, t\u01b0\u1edbi ngu\u1ed9i d\u1ed3i d\u00e0o \u0111\u1ec3 h\u1ea1n ch\u1ebf h\u00f3a b\u1ec1n ngu\u1ed9i.<br \/>\n&#8211; B\u1ec1 m\u1eb7t: n\u00ean pickling &#038; passivation sau gia c\u00f4ng \u0111\u1ec3 t\u00e1i t\u1ea1o l\u1edbp th\u1ee5 \u0111\u1ed9ng, \u0111\u1eb7c bi\u1ec7t trong m\u00f4i tr\u01b0\u1eddng ch\u1ee9a Cl-.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Han_Duplex_thuc_hanh_tot\"><\/span>H\u00e0n Duplex: th\u1ef1c h\u00e0nh t\u1ed1t<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; Quy tr\u00ecnh: GTAW\/GMAW\/SMAW\/SAW \u0111\u1ec1u kh\u1ea3 thi; ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ea7u v\u00e0o v\u00e0 nhi\u1ec7t \u0111\u1ed9 gi\u1eefa l\u1edbp h\u00e0n l\u00e0 then ch\u1ed1t \u0111\u1ec3 gi\u1eef t\u1ef7 l\u1ec7 pha v\u00e0 tr\u00e1nh sigma.<br \/>\n&#8211; V\u1eadt li\u1ec7u h\u00e0n khuy\u1ebfn ngh\u1ecb:<br \/>\n  &#8211; Duplex chu\u1ea9n: ER\/E2209 (22Cr-9Ni-3Mo-N).<br \/>\n  &#8211; Super Duplex: ER2594\/EN ISO 25 10 4 NL.<br \/>\n&#8211; Ki\u1ec3m so\u00e1t nhi\u1ec7t:<br \/>\n  &#8211; Nhi\u1ec7t \u0111\u1ea7u v\u00e0o \u0111i\u1ec3n h\u00ecnh: 0.5\u20132.5 kJ\/mm (t\u00f9y chi\u1ec1u d\u00e0y\/quy tr\u00ecnh).<br \/>\n  &#8211; Nhi\u1ec7t \u0111\u1ed9 gi\u1eefa l\u1edbp h\u00e0n: \u2264150\u00b0C cho lean\/duplex chu\u1ea9n; \u2264100\u00b0C cho super duplex.<br \/>\n&#8211; Sau h\u00e0n: Kh\u00f4ng c\u1ea7n \u1ee7 dung d\u1ecbch n\u1ebfu quy tr\u00ecnh \u0111\u00fang; v\u1edbi super duplex\/th\u00e0nh d\u00e0y c\u00f3 th\u1ec3 c\u1ea7n \u1ee7 dung d\u1ecbch 1020\u20131100\u00b0C r\u1ed3i l\u00e0m ngu\u1ed9i nhanh \u0111\u1ec3 ph\u1ee5c h\u1ed3i austenite.<br \/>\n&#8211; R\u1ee7i ro c\u1ea7n tr\u00e1nh: t\u1ea1o pha sigma (600\u20131000\u00b0C), gi\u00f2n 475\u00b0C khi \u1ee7\/gi\u1eef l\u00e2u trong v\u00f9ng nhi\u1ec7t kh\u00f4ng ph\u00f9 h\u1ee3p.<\/p>\n<h2 id=\"toc-5-lua-chon-mac-duplex-theo-moi-truong-viet-nam\"><span class=\"ez-toc-section\" id=\"Lua_chon_mac_Duplex_theo_moi_truong_Viet_Nam\"><\/span>L\u1ef1a ch\u1ecdn m\u00e1c Duplex theo m\u00f4i tr\u01b0\u1eddng Vi\u1ec7t Nam<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; M\u00f4i tr\u01b0\u1eddng \u0111\u00f4 th\u1ecb ven bi\u1ec3n, phun m\u00f9 mu\u1ed1i nh\u1eb9 (Cl- th\u1ea5p, nhi\u1ec7t \u0111\u1ed9 th\u01b0\u1eddng):<br \/>\n  &#8211; 2304 l\u00e0 l\u1ef1a ch\u1ecdn ti\u1ebft ki\u1ec7m thay 316L cho lan can, thang, b\u1ed3n n\u01b0\u1edbc mu\u1ed1i nh\u1eb9, h\u1ec7 PCCC ngo\u00e0i tr\u1eddi.<br \/>\n&#8211; N\u01b0\u1edbc l\u1ee3, khu v\u1ef1c c\u1ea3ng, nh\u00e0 m\u00e1y x\u1eed l\u00fd n\u01b0\u1edbc th\u1ea3i ch\u1ee9a Cl- trung b\u00ecnh, b\u1ed3n\/tr\u1ea1m RO, trao \u0111\u1ed5i nhi\u1ec7t n\u01b0\u1edbc l\u00e0m m\u00e1t:<br \/>\n  &#8211; 2205 l\u00e0 \u201c\u0111i\u1ec3m ng\u1ecdt\u201d c\u00e2n b\u1eb1ng chi ph\u00ed\u2013hi\u1ec7u n\u0103ng.<br \/>\n&#8211; N\u01b0\u1edbc bi\u1ec3n t\u1ef1 nhi\u00ean, d\u1ea7u kh\u00ed ngo\u00e0i kh\u01a1i, h\u1ec7 th\u1ed1ng b\u01a1m\/h\u1ec7 gi\u1eb1ng c\u1ea7u c\u1ea3ng, b\u1ed9 l\u1ecdc \u0111\u1ea7u h\u00fat RO:<br \/>\n  &#8211; 2507\/super duplex \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ch\u1ed1ng r\u1ed7\/k\u1ebd v\u00e0 SCC \u1edf nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh cao h\u01a1n.<br \/>\n&#8211; Quy t\u1eafc nhanh theo PREN:<br \/>\n  &#8211; PREN \u226540 cho n\u01b0\u1edbc bi\u1ec3n t\u1ef1 nhi\u00ean, m\u01b0a t\u00e1p mu\u1ed1i n\u1eb7ng.<br \/>\n  &#8211; PREN 32\u201336 cho n\u01b0\u1edbc l\u1ee3, s\u01b0\u01a1ng mu\u1ed1i trung b\u00ecnh, nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh \u0111\u1ebfn ~70\u00b0C.<br \/>\n  &#8211; PREN 26\u201328 cho kh\u00ed h\u1eadu bi\u1ec3n \u0111\u00f4 th\u1ecb kh\u00f4 r\u00e1o, \u00edt ng\u1eadp m\u1eb7n.<\/p>\n<h2 id=\"toc-6-ung-dung-tieu-bieu-tai-viet-nam\"><span class=\"ez-toc-section\" id=\"Ung_dung_tieu_bieu_tai_Viet_Nam\"><\/span>\u1ee8ng d\u1ee5ng ti\u00eau bi\u1ec3u t\u1ea1i Vi\u1ec7t Nam<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; D\u1ea7u kh\u00ed bi\u1ec3n \u0110\u00f4ng: \u0111\u01b0\u1eddng \u1ed1ng topside, \u1ed1ng trao \u0111\u1ed5i nhi\u1ec7t, \u1ed1ng ch\u00f9m n\u01b0\u1edbc bi\u1ec3n, manifold.<br \/>\n&#8211; H\u1ea1 t\u1ea7ng ven bi\u1ec3n: lan can, c\u1ea7u thang, bul\u00f4ng neo, k\u1ebft c\u1ea5u ph\u1ee5 tr\u1ee3 c\u1ea7u c\u1ea3ng\/du thuy\u1ec1n.<br \/>\n&#8211; N\u01b0\u1edbc &#038; m\u00f4i tr\u01b0\u1eddng: khung gi\u00e0n RO, b\u01a1m\u2013\u0111\u01b0\u1eddng \u1ed1ng n\u01b0\u1edbc bi\u1ec3n, b\u1ec3 tuy\u1ec3n n\u1ed5i DAF, thi\u1ebft b\u1ecb kh\u1eed m\u1eb7n.<br \/>\n&#8211; C\u00f4ng nghi\u1ec7p h\u00f3a ch\u1ea5t\/gi\u1ea5y &#038; b\u1ed9t gi\u1ea5y: b\u1ed3n, thi\u1ebft b\u1ecb trao \u0111\u1ed5i nhi\u1ec7t, th\u00e1p r\u1eeda.<br \/>\n&#8211; Ch\u1ebf bi\u1ebfn th\u1ee7y s\u1ea3n\u2013mu\u1ed1i: b\u1ed3n tr\u1ed9n, b\u0103ng t\u1ea3i, m\u00e1ng, khu v\u1ef1c r\u1eeda b\u1eb1ng n\u01b0\u1edbc mu\u1ed1i.<br \/>\n&#8211; PCCC ngo\u00e0i tr\u1eddi ven bi\u1ec3n, h\u1ec7 HVAC n\u01b0\u1edbc mu\u1ed1i, th\u00e1p gi\u1ea3i nhi\u1ec7t d\u00f9ng n\u01b0\u1edbc l\u1ee3.<\/p>\n<h2 id=\"toc-7-thiet-ke-va-lap-dat-nhung-luu-y-de-song-khoe-voi-c\"><span class=\"ez-toc-section\" id=\"Thiet_ke_va_lap_dat_nhung_luu_y_de_song_khoe_voi_Cl\"><\/span>Thi\u1ebft k\u1ebf v\u00e0 l\u1eafp \u0111\u1eb7t: nh\u1eefng l\u01b0u \u00fd \u0111\u1ec3 s\u1ed1ng kh\u1ecfe v\u1edbi Cl-<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; Thi\u1ebft k\u1ebf ch\u1ed1ng k\u1ebd h\u1edf: gi\u1ea3m khe h\u1edf, b\u00edt k\u00edn bul\u00f4ng\/kh\u1edbp n\u1ed1i \u0111\u1ec3 tr\u00e1nh \u0103n m\u00f2n k\u1ebd.<br \/>\n&#8211; T\u00e1ch ly \u0111i\u1ec7n h\u00f3a v\u1edbi th\u00e9p carbon\/nh\u00f4m\/\u0111\u1ed3ng b\u1eb1ng \u0111\u1ec7m phi kim ho\u1eb7c l\u1edbp ph\u1ee7, \u0111\u1eb7c bi\u1ec7t trong n\u01b0\u1edbc bi\u1ec3n.<br \/>\n&#8211; X\u1eed l\u00fd b\u1ec1 m\u1eb7t: pickling\u2013passivation sau h\u00e0n\/c\u1eaft; l\u00e0m s\u1ea1ch \u0111\u1ecbnh k\u1ef3, r\u1eeda n\u01b0\u1edbc ng\u1ecdt khi l\u00e0m vi\u1ec7c s\u00e1t bi\u1ec3n.<br \/>\n&#8211; C\u00e1ch nhi\u1ec7t ngo\u00e0i tr\u1eddi: d\u00f9ng b\u00f4ng c\u00e1ch nhi\u1ec7t kh\u00f4ng ch\u1ee9a Cl-, c\u00f3 l\u1edbp m\u00e0ng ch\u1ed1ng \u1ea9m \u0111\u1ec3 h\u1ea1n ch\u1ebf CUI (corrosion under insulation).<\/p>\n<h2 id=\"toc-8-kinh-te-vong-doi-lcc-vi-sao-duplex-thuong-re-hon-v\"><span class=\"ez-toc-section\" id=\"Kinh_te_vong_doi_LCC_vi_sao_Duplex_thuong_%E2%80%9Cre_hon_ve_lau_dai%E2%80%9D\"><\/span>Kinh t\u1ebf v\u00f2ng \u0111\u1eddi (LCC): v\u00ec sao Duplex th\u01b0\u1eddng \u201cr\u1ebb h\u01a1n v\u1ec1 l\u00e2u d\u00e0i\u201d<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; V\u1eadt li\u1ec7u ban \u0111\u1ea7u c\u00f3 th\u1ec3 cao h\u01a1n 316L, nh\u01b0ng:<br \/>\n  &#8211; Gi\u1ea3m chi\u1ec1u d\u00e0y nh\u1edd gi\u1edbi h\u1ea1n ch\u1ea3y cao \u2192 ti\u1ebft ki\u1ec7m tr\u1ecdng l\u01b0\u1ee3ng\/k\u1ebft c\u1ea5u \u0111\u1ee1.<br \/>\n  &#8211; Gi\u1ea3m b\u1ea3o tr\u00ec\/s\u01a1n ph\u1ee7\/\u0111\u00f3ng t\u00e0u do ch\u1ed1ng r\u1ed7 v\u00e0 SCC t\u1ed1t.<br \/>\n  &#8211; \u00cdt ph\u1ee5 thu\u1ed9c gi\u00e1 Ni (h\u00e0m l\u01b0\u1ee3ng Ni th\u1ea5p h\u01a1n 316) \u2192 \u1ed5n \u0111\u1ecbnh chi ph\u00ed h\u01a1n theo chu k\u1ef3 h\u00e0ng h\u00f3a.<br \/>\n&#8211; Nhi\u1ec1u d\u1ef1 \u00e1n th\u1ef1c t\u1ebf cho th\u1ea5y 2205 ho\u00e0n v\u1ed1n nhanh trong 2\u20134 n\u0103m \u1edf khu v\u1ef1c c\u00f3 s\u01b0\u01a1ng mu\u1ed1i so v\u1edbi 316L do chi ph\u00ed b\u1ea3o tr\u00ec th\u1ea5p.<\/p>\n<h2 id=\"toc-9-chuoi-cung-ung-va-kiem-soat-chat-luong-tai-viet-na\"><span class=\"ez-toc-section\" id=\"Chuoi_cung_ung_va_kiem_soat_chat_luong_tai_Viet_Nam\"><\/span>Chu\u1ed7i cung \u1ee9ng v\u00e0 ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng t\u1ea1i Vi\u1ec7t Nam<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; Ch\u1ee7ng lo\u1ea1i s\u1eb5n c\u00f3: t\u1ea5m No.1\/2B, \u1ed1ng h\u00e0n\/li\u1ec1n m\u1ea1ch SCH10S\u201340S, thanh tr\u00f2n; ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 2205.<br \/>\n&#8211; Ch\u1ee9ng ch\u1ec9: y\u00eau c\u1ea7u MTC 3.1 (EN 10204), ki\u1ec3m tra PMl (Positive Material Identification) \u0111\u1ec3 x\u00e1c nh\u1eadn Cr\u2013Mo\u2013N \u0111\u00fang chu\u1ea9n.<br \/>\n&#8211; Ti\u00eau ch\u00ed nh\u1eadn h\u00e0ng: b\u1ec1 m\u1eb7t pickled\/passivated, ki\u1ec3m tra ferite b\u1eb1ng m\u00e1y \u0111o (\u0111\u1eb7c bi\u1ec7t m\u1ed1i h\u00e0n), th\u1eed c\u01a1 l\u00fd\/corrosion khi d\u1ef1 \u00e1n y\u00eau c\u1ea7u.<\/p>\n<h2 id=\"toc-10-cau-hoi-thuong-gap\"><span class=\"ez-toc-section\" id=\"Cau_hoi_thuong_gap\"><\/span>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; Duplex c\u00f3 h\u00fat nam ch\u00e2m kh\u00f4ng? C\u00f3. Do c\u00f3 pha ferrite, Duplex h\u00fat nam ch\u00e2m nh\u1eb9\u2013v\u1eeba (kh\u00e1c v\u1edbi austenitic thu\u1ea7n th\u01b0\u1eddng kh\u00f4ng\/\u00edt h\u00fat).<br \/>\n&#8211; C\u00f3 th\u1ec3 h\u00e0n Duplex v\u1edbi 304\/316? C\u00f3, d\u00f9ng que\/d\u00e2y \u0111i\u1ec1n ph\u00f9 h\u1ee3p (th\u01b0\u1eddng 2209 khi h\u00e0n v\u1edbi 316\/304) v\u00e0 ki\u1ec3m so\u00e1t nhi\u1ec7t nh\u01b0 h\u01b0\u1edbng d\u1eabn cho Duplex.<br \/>\n&#8211; Duplex c\u00f3 thay th\u1ebf to\u00e0n b\u1ed9 316L kh\u00f4ng? Kh\u00f4ng. V\u1edbi m\u00f4i tr\u01b0\u1eddng axit kh\u1eed m\u1ea1nh ho\u1eb7c nhi\u1ec7t \u0111\u1ed9 r\u1ea5t th\u1ea5p c\u1ea7n th\u1ea9m \u0111\u1ecbnh ri\u00eang; song trong m\u00f4i tr\u01b0\u1eddng clorua, Duplex th\u01b0\u1eddng v\u01b0\u1ee3t tr\u1ed9i.<br \/>\n&#8211; C\u00f3 c\u1ea7n s\u01a1n ph\u1ee7? Th\u00f4ng th\u01b0\u1eddng kh\u00f4ng; nh\u01b0ng \u1edf m\u00f4i tr\u01b0\u1eddng c\u00f4ng nghi\u1ec7p n\u1eb7ng\/n\u01b0\u1edbc bi\u1ec3n b\u1eafn tr\u1ef1c ti\u1ebfp, s\u01a1n b\u1ea3o v\u1ec7 khe h\u1edf v\u00e0 khu v\u1ef1c k\u00e9m tho\u00e1t n\u01b0\u1edbc v\u1eabn h\u1eefu \u00edch.<\/p>\n<h2 id=\"toc-11-nguon-tham-khao\"><span class=\"ez-toc-section\" id=\"Nguon_tham_khao\"><\/span>Ngu\u1ed3n tham kh\u1ea3o<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; ASTM A240\/A276\/A789\/A790\/A815; ASME SA-240\/SA-182; EN 10088; EN 10204 3.1.<br \/>\n&#8211; NACE MR0175 \/ ISO 15156 \u2013 Petroleum and natural gas industries \u2014 Materials for use in H2S-containing environments.<br \/>\n&#8211; International Molybdenum Association (IMOA) \u2013 Practical Guidelines for the Fabrication of Duplex Stainless Steels: https:\/\/www.imoa.info<br \/>\n&#8211; Outokumpu Stainless Steel Handbook &#038; datasheets (2304\/2205\/2507): https:\/\/www.outokumpu.com<br \/>\n&#8211; Sandvik\/Alleima datasheets for 2205\/2507 and welding guidance: https:\/\/www.alleima.com<br \/>\n&#8211; Avesta Welding Manual \u2013 Duplex and Super Duplex guidelines: https:\/\/www.voestalpine.com\/welding<\/p>\n<h2 id=\"toc-12-ket-luan\"><span class=\"ez-toc-section\" id=\"Ket_luan\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Inox Duplex l\u00e0 l\u1eddi gi\u1ea3i \u201chai trong m\u1ed9t\u201d cho m\u00f4i tr\u01b0\u1eddng gi\u00e0u clorua: c\u01a1 t\u00ednh cao (gi\u1edbi h\u1ea1n ch\u1ea3y ~2\u00d7 304\/316) v\u00e0 kh\u00e1ng r\u1ed7\/SCC v\u01b0\u1ee3t tr\u1ed9i. 2304 ph\u00f9 h\u1ee3p m\u00f4i tr\u01b0\u1eddng ven bi\u1ec3n nh\u1eb9, 2205 l\u00e0 l\u1ef1a ch\u1ecdn ti\u00eau chu\u1ea9n \u0111a d\u1ee5ng, trong khi 2507 d\u00e0nh cho n\u01b0\u1edbc bi\u1ec3n t\u1ef1 nhi\u00ean\/d\u1ea7u kh\u00ed bi\u1ec3n. Th\u00e0nh c\u00f4ng c\u1ee7a Duplex ph\u1ee5 thu\u1ed9c v\u00e0o ch\u1ecdn m\u00e1c theo PREN, thi\u1ebft k\u1ebf ch\u1ed1ng k\u1ebd h\u1edf, x\u1eed l\u00fd b\u1ec1 m\u1eb7t, v\u00e0 quy tr\u00ecnh h\u00e0n ki\u1ec3m so\u00e1t nhi\u1ec7t t\u1ed1t. Khi x\u00e9t chi ph\u00ed v\u00f2ng \u0111\u1eddi, Duplex th\u01b0\u1eddng kinh t\u1ebf h\u01a1n 316L \u1edf m\u00f4i tr\u01b0\u1eddng g\u1ea7n bi\u1ec3n nh\u1edd b\u1ec1n l\u00e2u v\u00e0 \u00edt b\u1ea3o tr\u00ec.<\/p>\n<p>C\u1ea7n t\u01b0 v\u1ea5n ch\u1ecdn m\u00e1c, quy c\u00e1ch t\u1ed3n kho, ho\u1eb7c b\u00e1o gi\u00e1 nhanh cho d\u1ef1 \u00e1n t\u1ea1i H\u00e0 N\u1ed9i v\u00e0 mi\u1ec1n B\u1eafc? Li\u00ean h\u1ec7 Inox Cuong Thinh \u2013 Hotline: 0343.417.281 \u2013 Email: inoxcongnghiep.cuongthinh@gmail.com. Ch\u00fang t\u00f4i cung c\u1ea5p \u0111\u1ea7y \u0111\u1ee7 t\u1ea5m\/\u1ed1ng\/thanh Duplex 2304\/2205\/2507 c\u00f9ng ch\u1ee9ng ch\u1ec9 MTC 3.1 v\u00e0 h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt h\u00e0n\u2013gia c\u00f4ng t\u1ea1i x\u01b0\u1edfng.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Gi\u1ea3i th\u00edch Inox Duplex: vi c\u1ea5u tr\u00fac hai pha, c\u01a1 t\u00ednh v\u01b0\u1ee3t 304\/316, kh\u00e1ng \u0103n m\u00f2n Cl- cao. So s\u00e1nh 2304\/2205\/2507, ti\u00eau chu\u1ea9n, h\u00e0n, \u1ee9ng d\u1ee5ng.<\/p>\n","protected":false},"author":7,"featured_media":1012,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-2536","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"acf":[],"_links":{"self":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/2536","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/comments?post=2536"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/2536\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1012"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=2536"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=2536"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=2536"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}