{"id":1778,"date":"2026-03-14T00:34:28","date_gmt":"2026-03-13T17:34:28","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/ung-dung-inox-duplex-super-duplex-trong-khai-thac-dau-khi\/"},"modified":"2026-03-14T00:34:28","modified_gmt":"2026-03-13T17:34:28","slug":"ung-dung-inox-duplex-super-duplex-trong-khai-thac-dau-khi","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/ung-dung-inox-duplex-super-duplex-trong-khai-thac-dau-khi\/","title":{"rendered":"\u1ee8ng d\u1ee5ng Inox Duplex &#038; Super Duplex trong khai th\u00e1c d\u1ea7u kh\u00ed"},"content":{"rendered":"<div class=\"custom-toc\">\n<h3>N\u1ed9i dung ch\u00ednh<\/h3>\n<ul>\n<li><a href=\"#toc-0-duplexsuper-duplex-la-gi-va-vi-sao-phu-hop-dau-khi\">Duplex\/Super Duplex l\u00e0 g\u00ec v\u00e0 v\u00ec sao ph\u00f9 h\u1ee3p d\u1ea7u kh\u00ed?<\/a><\/li>\n<li><a href=\"#toc-1-nhung-loi-the-ky-thuat-chinh-trong-dau-khi\">Nh\u1eefng l\u1ee3i th\u1ebf k\u1ef9 thu\u1eadt ch\u00ednh trong d\u1ea7u kh\u00ed<\/a><\/li>\n<li><a href=\"#toc-2-ung-dung-theo-he-thong-trong-khai-thac-dau-khi\">\u1ee8ng d\u1ee5ng theo h\u1ec7 th\u1ed1ng trong khai th\u00e1c d\u1ea7u kh\u00ed<\/a><\/li>\n<li><a href=\"#toc-3-huong-dan-chon-mac-nhanh-chinh-xac\">H\u01b0\u1edbng d\u1eabn ch\u1ecdn m\u00e1c: nhanh \u2013 ch\u00ednh x\u00e1c<\/a><\/li>\n<li><a href=\"#toc-4-tieu-chuan-ma-va-thong-so-kiem-soat-chat-luong\">Ti\u00eau chu\u1ea9n, m\u00e3 v\u00e0 th\u00f4ng s\u1ed1 ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng<\/a><\/li>\n<li><a href=\"#toc-5-gia-cong-han-va-xu-ly-be-mat-lam-dung-ngay-tu-dau\">Gia c\u00f4ng, h\u00e0n v\u00e0 x\u1eed l\u00fd b\u1ec1 m\u1eb7t: l\u00e0m \u0111\u00fang ngay t\u1eeb \u0111\u1ea7u<\/a><\/li>\n<li><a href=\"#toc-6-sai-hong-dien-hinh-va-cach-tranh\">Sai h\u1ecfng \u0111i\u1ec3n h\u00ecnh v\u00e0 c\u00e1ch tr\u00e1nh<\/a><\/li>\n<li><a href=\"#toc-7-hieu-qua-chi-phi-vong-doi-lcc\">Hi\u1ec7u qu\u1ea3 chi ph\u00ed v\u00f2ng \u0111\u1eddi (LCC)<\/a><\/li>\n<li><a href=\"#toc-8-luu-y-ap-dung-tai-viet-nam\">L\u01b0u \u00fd \u00e1p d\u1ee5ng t\u1ea1i Vi\u1ec7t Nam<\/a><\/li>\n<li><a href=\"#toc-9-tai-lieu-tham-khao\">T\u00e0i li\u1ec7u tham kh\u1ea3o<\/a><\/li>\n<li><a href=\"#toc-10-ket-luan\">K\u1ebft lu\u1eadn<\/a><\/li>\n<\/ul>\n<\/div>\n<p>Trong chu\u1ed7i \u201cInox trong C\u00f4ng nghi\u1ec7p N\u1eb7ng\u201d, inox Duplex v\u00e0 Super Duplex n\u1ed5i l\u00ean nh\u01b0 v\u1eadt li\u1ec7u chi\u1ebfn l\u01b0\u1ee3c cho m\u00f4i tr\u01b0\u1eddng d\u1ea7u kh\u00ed gi\u00e0u clorua, CO2\/H2S v\u00e0 \u00e1p l\u1ef1c cao. B\u00e0i vi\u1ebft n\u00e0y \u0111i th\u1eb3ng v\u00e0o c\u1ed1t l\u00f5i: v\u00ec sao Duplex\/Super Duplex \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng, ch\u1ecdn m\u00e1c n\u00e0o cho t\u1eebng h\u1ec7 th\u1ed1ng, ti\u00eau chu\u1ea9n n\u00e0o ph\u1ea3i tu\u00e2n th\u1ee7, v\u00e0 c\u00e1c \u0111i\u1ec3m m\u1ea5u ch\u1ed1t khi ch\u1ebf t\u1ea1o \u2013 l\u1eafp \u0111\u1eb7t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o tu\u1ed5i th\u1ecd \u0111\u01b0\u1eddng \u1ed1ng, thi\u1ebft b\u1ecb ngo\u00e0i kh\u01a1i v\u00e0 th\u01b0\u1ee3ng ngu\u1ed3n.<\/p>\n<h2 id=\"toc-0-duplexsuper-duplex-la-gi-va-vi-sao-phu-hop-dau-khi\">Duplex\/Super Duplex l\u00e0 g\u00ec v\u00e0 v\u00ec sao ph\u00f9 h\u1ee3p d\u1ea7u kh\u00ed?<\/h2>\n<p>&#8211; Vi c\u1ea5u tr\u00fac: 50\/50 austenite\u2013ferrite gi\u00fap c\u00e2n b\u1eb1ng gi\u1eefa \u0111\u1ed9 d\u1ebbo v\u00e0 \u0111\u1ed9 b\u1ec1n, \u0111\u1ed3ng th\u1eddi ch\u1ed1ng n\u1ee9t \u1ee9ng su\u1ea5t do clorua (Cl-SCC) t\u1ed1t h\u01a1n inox austenitic 300-series.<br \/>\n&#8211; Th\u00e0nh ph\u1ea7n \u0111i\u1ec3n h\u00ecnh:<br \/>\n  &#8211; 22Cr Duplex (UNS S32205\/S31803 \u2013 th\u01b0\u1eddng g\u1ecdi 2205): ~22%Cr, ~3%Mo, ~5\u20136%Ni, N t\u0103ng c\u01b0\u1eddng. PREN \u2248 34\u201336.<br \/>\n  &#8211; 25Cr Super Duplex (UNS S32750\/S32760 \u2013 2507\/Zeron 100): ~25%Cr, 3.5\u20134%Mo, 7%Ni, N cao; S32760 c\u00f3 th\u00eam W ~0.7%. PREN \u2265 40\u201345.<br \/>\n  &#8211; C\u00f4ng th\u1ee9c PREN \u2248 %Cr + 3.3\u00d7%Mo + 16\u00d7%N (+1.65\u00d7%W n\u1ebfu c\u00f3) \u2013 l\u00e0 ch\u1ec9 s\u1ed1 ti\u00ean \u0111o\u00e1n kh\u1ea3 n\u0103ng ch\u1ed1ng pitting\/crevice trong n\u01b0\u1edbc bi\u1ec3n.<br \/>\n&#8211; C\u01a1 t\u00ednh: gi\u1edbi h\u1ea1n ch\u1ea3y 2205 ~450\u2013550 MPa; 2507 ~550\u2013640 MPa; cao g\u1ea5p ~2 l\u1ea7n 316L. Cho ph\u00e9p gi\u1ea3m chi\u1ec1u d\u00e0y\/th\u00e9p n\u1eb7ng, \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch cho topside v\u00e0 subsea n\u01a1i kh\u1ed1i l\u01b0\u1ee3ng \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn CAPEX\/OPEX.<br \/>\n&#8211; Ch\u1ed1ng \u0103n m\u00f2n: ch\u1ed1ng pitting\/crevice trong n\u01b0\u1edbc bi\u1ec3n t\u1ed1t; ch\u1ecbu CO2 (sweet) r\u1ea5t t\u1ed1t; c\u00f3 \u201cc\u1eeda s\u1ed5 \u00e1p d\u1ee5ng\u201d trong m\u00f4i tr\u01b0\u1eddng H2S (sour) theo ISO 15156\/NACE MR0175 n\u1ebfu ki\u1ec3m so\u00e1t Cl\u2212, nhi\u1ec7t \u0111\u1ed9, pH v\u00e0 \u1ee9ng su\u1ea5t.<\/p>\n<h2 id=\"toc-1-nhung-loi-the-ky-thuat-chinh-trong-dau-khi\">Nh\u1eefng l\u1ee3i th\u1ebf k\u1ef9 thu\u1eadt ch\u00ednh trong d\u1ea7u kh\u00ed<\/h2>\n<p>&#8211; Ch\u1ed1ng \u0103n m\u00f2n do n\u01b0\u1edbc bi\u1ec3n\/n\u01b0\u1edbc ti\u00eam \u00e9p: Super Duplex l\u00e0 ti\u00eau chu\u1ea9n v\u00e0ng cho h\u1ec7 firewater, cooling seawater, water injection c\u00f3 oxy; Duplex 2205 d\u00f9ng t\u1ed1t cho n\u01b0\u1edbc bi\u1ec3n \u0111\u00e3 l\u1ecdc\/kh\u1eed tr\u00f9ng \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p h\u01a1n.<br \/>\n&#8211; Kh\u00e1ng Cl-SCC v\u01b0\u1ee3t tr\u1ed9i so v\u1edbi 304\/316\/904L; gi\u1ea3m nguy c\u01a1 r\u00f2 r\u1ec9 d\u1eebng gi\u00e0n.<br \/>\n&#8211; C\u01b0\u1eddng \u0111\u1ed9 cao gi\u1ea3m chi\u1ec1u d\u00e0y \u1ed1ng\/b\u1ed3n, t\u1ed1i \u01b0u tr\u1ecdng l\u01b0\u1ee3ng topside\/FPSO v\u00e0 gi\u1ea3m t\u1ea3i cho k\u1ebft c\u1ea5u.<br \/>\n&#8211; Nhi\u1ec7t \u0111\u1ed9 l\u00e0m vi\u1ec7c \u0111i\u1ec3n h\u00ecnh: -50 \u0111\u1ebfn ~250\u00b0C (tr\u00e1nh >300\u00b0C v\u00ec pha sigma\/gi\u00f2n 475\u00b0C). Trong d\u1ea7u kh\u00ed th\u01b0\u1eddng <150\u2013200\u00b0C cho m\u00f4i tr\u01b0\u1eddng clorua.\n- T\u00ednh kh\u1ea3 d\u1ee5ng \u0111a d\u1ea1ng d\u1ea1ng s\u1ea3n ph\u1ea9m: \u1ed1ng li\u1ec1n m\u1ea1ch\/h\u00e0n (ASTM A789\/A790), ph\u1ee5 ki\u1ec7n (ASTM A815), m\u1eb7t b\u00edch\/r\u00e8n (ASTM A182), t\u1ea5m (ASTM A240), ph\u00f9 h\u1ee3p ch\u1ebf t\u1ea1o \u0111\u1ed3ng b\u1ed9.\n\n\n\n<h2 id=\"toc-2-ung-dung-theo-he-thong-trong-khai-thac-dau-khi\">\u1ee8ng d\u1ee5ng theo h\u1ec7 th\u1ed1ng trong khai th\u00e1c d\u1ea7u kh\u00ed<\/h2>\n<h3>1) H\u1ec7 n\u01b0\u1edbc bi\u1ec3n topside: firewater, cooling, ballast<\/h3>\n<p>&#8211; Super Duplex (S32750\/S32760): \u0111\u01b0\u1eddng v\u00f2ng c\u1ee9u h\u1ecfa, main headers, b\u01a1m v\u00e0 valve seawater, \u1ed1ng trao \u0111\u1ed5i nhi\u1ec7t t\u1ea5m-\u0111\u1ec7m ti\u1ebfp x\u00fac n\u01b0\u1edbc bi\u1ec3n.<br \/>\n&#8211; Duplex 2205: nh\u00e1nh ph\u00e2n ph\u1ed1i, \u1ed1ng nh\u1ecf h\u01a1n, h\u1ec7 n\u01b0\u1edbc bi\u1ec3n \u0111\u00e3 kh\u1eed tr\u00f9ng\/\u0111i\u1ec1u ki\u1ec7n Cl\u2212 th\u1ea5p h\u01a1n, \u0111\u01b0\u1eddng x\u1ea3.<\/p>\n<h3>2) H\u1ec7 n\u01b0\u1edbc ti\u00eam \u00e9p (Water Injection) v\u00e0 x\u1eed l\u00fd n\u01b0\u1edbc s\u1ea3n ph\u1ea9m<\/h3>\n<p>&#8211; Super Duplex cho \u0111\u01b0\u1eddng cao \u00e1p, manifold, \u1ed1ng xo\u1eafn trao \u0111\u1ed5i nhi\u1ec7t; ch\u1ecbu clorua + oxy v\u1ebft.<br \/>\n&#8211; \u1ed0ng cao \u00e1p v\u00e0 ph\u1ee5 ki\u1ec7n theo ASTM A790\/A815; y\u00eau c\u1ea7u ki\u1ec3m tra \u0103n m\u00f2n r\u1ed7 ASTM G48 \u1edf nhi\u1ec7t \u0111\u1ed9 quy \u0111\u1ecbnh theo NORSOK.<\/p>\n<h3>3) Piping\/process topside: CO2\/H2S, amine, glycol<\/h3>\n<p>&#8211; Duplex 2205 d\u00f9ng cho sweet service nhi\u1ec1u CO2\/Cl\u2212; thay th\u1ebf 316L\/duplex ngh\u00e8o khi CPT y\u00eau c\u1ea7u cao h\u01a1n.<br \/>\n&#8211; V\u1edbi sour service: tham chi\u1ebfu ISO 15156 \u0111\u1ec3 x\u00e1c nh\u1eadn \u201cenvelope\u201d cho 2205; n\u1ebfu \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t (Cl\u2212\/T\/H2S cao), chuy\u1ec3n sang Super Duplex ho\u1eb7c Ni-base.<\/p>\n<h3>4) Subsea: umbilicals, manifolds, Xmas trees, connectors<\/h3>\n<p>&#8211; \u1ed0ng umbilical si\u00eau s\u1ea1ch b\u1eb1ng Super Duplex (ASTM A789) do y\u00eau c\u1ea7u CPT\/PREN cao v\u00e0 \u0111\u1ed9 b\u1ec1n m\u1ecfi.<br \/>\n&#8211; Kh\u1edbp n\u1ed1i, body valve, choke trim b\u1eb1ng Super Duplex\/S32760 cho m\u00f4i tr\u01b0\u1eddng n\u01b0\u1edbc bi\u1ec3n \u00e1p su\u1ea5t cao.<\/p>\n<h3>5) Flowlines\/risers v\u00e0 \u1ed1ng CRA clad\/liner<\/h3>\n<p>&#8211; Super Duplex d\u00f9ng l\u00e0m l\u1edbp \u1ed1p (clad) ho\u1eb7c \u1ed1ng l\u00f3t (liner) b\u00ean trong \u1ed1ng carbon steel theo API 5LD \u0111\u1ec3 ch\u1ed1ng \u0103n m\u00f2n s\u1ea3n ph\u1ea9m gi\u00e0u Cl\u2212\/CO2\/H2S.<br \/>\n&#8211; Overlay h\u00e0n t\u1eeb v\u1eadt li\u1ec7u 25Cr tr\u00ean b\u1ec1 m\u1eb7t trong c\u1ee7a thi\u1ebft b\u1ecb \u00e1p l\u1ef1c, T-piece, header.<\/p>\n<h3>6) Thi\u1ebft b\u1ecb trao \u0111\u1ed5i nhi\u1ec7t, b\u00ecnh \u00e1p l\u1ef1c, skid x\u1eed l\u00fd<\/h3>\n<p>&#8211; T\u1ea5m\/bundle \u1ed1ng 2205\/2507 cho n\u01b0\u1edbc bi\u1ec3n l\u00e0m m\u00e1t v\u00e0 n\u01b0\u1edbc s\u1ea3n ph\u1ea9m; s\u1ed1 pass nhi\u1ec1u v\u00e0 khe h\u1eb9p d\u1ec5 b\u1ecb crevice \u2013 \u01b0u ti\u00ean Super Duplex khi CPT y\u00eau c\u1ea7u cao.<br \/>\n&#8211; B\u00ecnh \u00e1p l\u1ef1c l\u00f3t Super Duplex ho\u1eb7c ch\u1ebf t\u1ea1o to\u00e0n ph\u1ea7n khi t\u1ea3i tr\u1ecdng cho ph\u00e9p.<\/p>\n<h3>7) Ph\u1ee5 ki\u1ec7n quay v\u00e0 bul\u00f4ng<\/h3>\n<p>&#8211; C\u00e1nh b\u01a1m, tr\u1ee5c, seat\/trim van, bul\u00f4ng\/nuts Duplex\/Super Duplex cho h\u1ec7 seawater v\u00e0 splash zone; ki\u1ec3m so\u00e1t HTHA\/galvanic v\u1edbi \u0111\u1ed3ng\u2013niken v\u00e0 titan.<\/p>\n<h2 id=\"toc-3-huong-dan-chon-mac-nhanh-chinh-xac\">H\u01b0\u1edbng d\u1eabn ch\u1ecdn m\u00e1c: nhanh \u2013 ch\u00ednh x\u00e1c<\/h2>\n<p>&#8211; M\u00f4i tr\u01b0\u1eddng n\u01b0\u1edbc bi\u1ec3n c\u00f3 oxy, nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh\u2013cao, khe h\u1edf kh\u00f4ng tr\u00e1nh \u0111\u01b0\u1ee3c:<br \/>\n  &#8211; \u01afu ti\u00ean Super Duplex (S32750\/S32760). PREN \u226540 gi\u1ea3m r\u1ee7i ro r\u1ed7\/khe.<br \/>\n&#8211; Sweet service (CO2) + Cl\u2212 v\u1eeba ph\u1ea3i, nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh:<br \/>\n  &#8211; Duplex 2205 l\u00e0 l\u1ef1a ch\u1ecdn t\u1ed1i \u01b0u chi ph\u00ed\u2013hi\u1ec7u n\u0103ng.<br \/>\n&#8211; Sour service (H2S hi\u1ec7n di\u1ec7n):<br \/>\n  &#8211; Ki\u1ec3m tra ISO 15156-3: m\u1ed9t s\u1ed1 \u0111i\u1ec1u ki\u1ec7n cho ph\u00e9p 2205; n\u1ebfu v\u01b0\u1ee3t \u201cenvelope\u201d chuy\u1ec3n Super Duplex ho\u1eb7c h\u1ee3p kim Ni (625\/825) t\u00f9y T, pH, Cl\u2212, pH2S.<br \/>\n&#8211; Y\u00eau c\u1ea7u gi\u1ea3m tr\u1ecdng l\u01b0\u1ee3ng\/k\u1ebft c\u1ea5u h\u1ea1n ch\u1ebf:<br \/>\n  &#8211; C\u1ea3 2205 v\u00e0 2507 cho ph\u00e9p gi\u1ea3m chi\u1ec1u d\u00e0y so v\u1edbi 316\/904L m\u00e0 v\u1eabn \u0111\u00e1p \u1ee9ng b\u1ec1n.<\/p>\n<p>Ghi ch\u00fa: Lu\u00f4n k\u1ebft h\u1ee3p \u0111\u00e1nh gi\u00e1 CPT (ASTM G48), PREN m\u1ee5c ti\u00eau c\u1ee7a d\u1ef1 \u00e1n, v\u00e0 bi\u1ec3u \u0111\u1ed3 l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u theo ISO 21457 cho h\u1ec7 th\u1ed1ng s\u1ea3n xu\u1ea5t\/d\u1eabn xu\u1ea5t th\u1ee7y.<\/p>\n<h2 id=\"toc-4-tieu-chuan-ma-va-thong-so-kiem-soat-chat-luong\">Ti\u00eau chu\u1ea9n, m\u00e3 v\u00e0 th\u00f4ng s\u1ed1 ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng<\/h2>\n<p>&#8211; V\u1eadt li\u1ec7u v\u00e0 s\u1ea3n ph\u1ea9m:<br \/>\n  &#8211; ASTM A240 (t\u1ea5m), A276 (thanh), A789 (\u1ed1ng trao \u0111\u1ed5i nhi\u1ec7t), A790 (\u1ed1ng c\u00f4ng ngh\u1ec7), A815 (ph\u1ee5 ki\u1ec7n), A182 (m\u1eb7t b\u00edch\/r\u00e8n).<br \/>\n  &#8211; EN 10204 3.1\/3.2 ch\u1ee9ng ch\u1ec9 xu\u1ea5t x\u01b0\u1edfng.<br \/>\n&#8211; Y\u00eau c\u1ea7u ng\u00e0nh d\u1ea7u kh\u00ed:<br \/>\n  &#8211; NORSOK M-630 (MDS cho Duplex 22Cr\/25Cr), NORSOK M-650 (ch\u1ee9ng nh\u1eadn nh\u00e0 ch\u1ebf t\u1ea1o v\u1eadt li\u1ec7u \u0111\u1eb7c bi\u1ec7t), NORSOK M-601 (h\u00e0n thi\u1ebft b\u1ecb \u0111\u01b0\u1eddng \u1ed1ng).<br \/>\n  &#8211; ISO 15156\/NACE MR0175 (v\u1eadt li\u1ec7u trong m\u00f4i tr\u01b0\u1eddng H2S).<br \/>\n  &#8211; ISO 21457 (l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u v\u00e0 ki\u1ec3m so\u00e1t \u0103n m\u00f2n cho h\u1ec7 s\u1ea3n xu\u1ea5t d\u1ea7u kh\u00ed).<br \/>\n  &#8211; DNV-RP-F112 (thi\u1ebft k\u1ebf\/ch\u1ecdn Duplex cho \u1ed1ng ng\u1ea7m \u2013 tham kh\u1ea3o).<br \/>\n&#8211; Ki\u1ec3m tra\/b\u1ea3o \u0111\u1ea3m ch\u1ea5t l\u01b0\u1ee3ng:<br \/>\n  &#8211; Ph\u00e2n t\u00edch pha: c\u00e2n b\u1eb1ng ferrite\u2013austenite ~35\u201365% sau h\u00e0n\/nhi\u1ec7t luy\u1ec7n.<br \/>\n  &#8211; Th\u1eed \u0103n m\u00f2n r\u1ed7 ASTM G48 (Ph\u01b0\u01a1ng ph\u00e1p A\/C) \u1edf nhi\u1ec7t \u0111\u1ed9 ch\u1ec9 \u0111\u1ecbnh d\u1ef1 \u00e1n.<br \/>\n  &#8211; Ki\u1ec3m so\u00e1t \u0111\u1ed9 c\u1ee9ng (v\u00ed d\u1ee5 \u2264 300 HV10 theo \u0111\u1eb7c t\u1ea3 d\u1ef1 \u00e1n\/NORSOK).<br \/>\n  &#8211; PMI, \u0111o ferrite t\u1ea1i ch\u1ed7, UT\/RT m\u1ed1i h\u00e0n, th\u1eed va \u0111\u1eadp khi y\u00eau c\u1ea7u nhi\u1ec7t \u0111\u1ed9 th\u1ea5p.<\/p>\n<h2 id=\"toc-5-gia-cong-han-va-xu-ly-be-mat-lam-dung-ngay-tu-dau\">Gia c\u00f4ng, h\u00e0n v\u00e0 x\u1eed l\u00fd b\u1ec1 m\u1eb7t: l\u00e0m \u0111\u00fang ngay t\u1eeb \u0111\u1ea7u<\/h2>\n<p>&#8211; Gia c\u00f4ng:<br \/>\n  &#8211; D\u00f9ng dao c\u1ee5 s\u1eafc, t\u1ed1c \u0111\u1ed9 c\u1eaft th\u1ea5p h\u01a1n austenitic; tr\u00e1nh l\u00e0m c\u1ee9ng bi\u1ebfn d\u1ea1ng qu\u00e1 m\u1ee9c.<br \/>\n  &#8211; T\u00e1ch bi\u1ec7t khu v\u1ef1c, d\u1ee5ng c\u1ee5 v\u1edbi carbon steel \u0111\u1ec3 ng\u1eeba nhi\u1ec5m s\u1eaft t\u1ef1 do.<br \/>\n&#8211; H\u00e0n:<br \/>\n  &#8211; Ki\u1ec3m so\u00e1t nhi\u1ec7t v\u00e0o v\u00e0 nhi\u1ec7t \u0111\u1ed9 l\u1edbp gi\u1eefa: th\u01b0\u1eddng 0.5\u20132.5 kJ\/mm; interpass ~100\u2013150\u00b0C (kh\u1eaft khe h\u01a1n v\u1edbi Super Duplex). Tr\u00e1nh qu\u00e1 nhi\u1ec7t g\u00e2y pha sigma.<br \/>\n  &#8211; Que\/d\u00e2y h\u00e0n: 2205 d\u00f9ng ER\/E2209; Super Duplex d\u00f9ng ER2594\/ER2553; kh\u00ed b\u1ea3o v\u1ec7 c\u00f3 b\u1ed5 sung N2\/Ar+N2 \u0111\u1ec3 gi\u1eef c\u00e2n b\u1eb1ng pha.<br \/>\n  &#8211; Kh\u00f4ng c\u1ea7n ram nhi\u1ec7t sau h\u00e0n; pickling + passivation b\u1eaft bu\u1ed9c \u0111\u1ec3 ph\u1ee5c h\u1ed3i m\u00e0ng th\u1ee5 \u0111\u1ed9ng.<br \/>\n&#8211; Ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t:<br \/>\n  &#8211; Lo\u1ea1i b\u1ecf x\u1ec9\/oxi h\u00f3a; pickling paste\/b\u1ec3 axit theo khuy\u1ebfn ngh\u1ecb nh\u00e0 s\u1ea3n xu\u1ea5t; r\u1eeda s\u1ea1ch, ki\u1ec3m tra s\u1ea1ch chloride.<\/p>\n<h2 id=\"toc-6-sai-hong-dien-hinh-va-cach-tranh\">Sai h\u1ecfng \u0111i\u1ec3n h\u00ecnh v\u00e0 c\u00e1ch tr\u00e1nh<\/h2>\n<p>&#8211; Pitting\/crevice quanh gio\u0103ng, k\u1eb9p U-bolt: d\u00f9ng Super Duplex, gi\u1ea3m khe h\u1edf, ch\u1ecdn gio\u0103ng ph\u00f9 h\u1ee3p, ki\u1ec3m so\u00e1t Cl\u2212 v\u00e0 oxy.<br \/>\n&#8211; N\u1ee9t do sigma\/intermetallic: do gia nhi\u1ec7t 600\u2013950\u00b0C k\u00e9o d\u00e0i; ki\u1ec3m so\u00e1t chu tr\u00ecnh h\u00e0n, tr\u00e1nh PWHT kh\u00f4ng c\u1ea7n thi\u1ebft.<br \/>\n&#8211; SCC do \u0111i\u1ec1u ki\u1ec7n v\u01b0\u1ee3t \u201cenvelope\u201d: tu\u00e2n th\u1ee7 ISO 15156, gi\u1ea3m \u1ee9ng su\u1ea5t, ch\u1ecdn m\u00e1c cao h\u01a1n khi T\/Cl\u2212 t\u0103ng.<br \/>\n&#8211; \u0102n m\u00f2n galvanic: t\u00e1ch \u0111i\u1ec7n c\u1ef1c khi gh\u00e9p v\u1edbi \u0111\u1ed3ng\u2013niken\/titanium; d\u00f9ng v\u00f2ng c\u00e1ch \u0111i\u1ec7n, s\u01a1n c\u00e1ch \u0111i\u1ec7n v\u00f9ng n\u1ed1i.<\/p>\n<h2 id=\"toc-7-hieu-qua-chi-phi-vong-doi-lcc\">Hi\u1ec7u qu\u1ea3 chi ph\u00ed v\u00f2ng \u0111\u1eddi (LCC)<\/h2>\n<p>&#8211; So v\u1edbi 316L\/904L: Duplex\/Super Duplex c\u00f3 CPT\/PREN cao h\u01a1n v\u00e0 Rp0.2 g\u1ea5p ~1.7\u20132.2 l\u1ea7n, cho ph\u00e9p:<br \/>\n  &#8211; Gi\u1ea3m b\u1ec1 d\u00e0y 20\u201335% t\u00f9y \u00e1p su\u1ea5t.<br \/>\n  &#8211; Gi\u1ea3m thay th\u1ebf\/s\u1eeda ch\u1eefa do r\u1ed7\/khe trong n\u01b0\u1edbc bi\u1ec3n, \u0111\u1eb7c bi\u1ec7t \u1edf FPSO\/gi\u00e0n kh\u00f4ng th\u1ec3 d\u1eebng l\u00e2u.<br \/>\n&#8211; So v\u1edbi h\u1ee3p kim Ni (625\/825): chi ph\u00ed v\u1eadt li\u1ec7u Duplex th\u1ea5p \u0111\u00e1ng k\u1ec3; Super Duplex bao ph\u1ee7 ph\u1ea7n l\u1edbn tr\u01b0\u1eddng h\u1ee3p seawater\/CO2, ch\u1ec9 khi sour kh\u1eafc nghi\u1ec7t m\u1edbi c\u1ea7n Ni-base.<\/p>\n<h2 id=\"toc-8-luu-y-ap-dung-tai-viet-nam\">L\u01b0u \u00fd \u00e1p d\u1ee5ng t\u1ea1i Vi\u1ec7t Nam<\/h2>\n<p>&#8211; M\u00f4i tr\u01b0\u1eddng bi\u1ec3n nhi\u1ec7t \u0111\u1edbi (Bi\u1ec3n \u0110\u00f4ng) c\u00f3 Cl\u2212 v\u00e0 nhi\u1ec7t \u0111\u1ed9 cao; \u01b0u ti\u00ean Super Duplex cho h\u1ec7 seawater topside\/splash zone.<br \/>\n&#8211; C\u00e1c m\u1ecf kh\u00ed\u2013condensate c\u00f3 CO2\/H2S: c\u1ea7n ki\u1ec3m tra ISO 15156 v\u00e0 th\u1eed nghi\u1ec7m G48 theo \u0111i\u1ec1u ki\u1ec7n th\u1ef1c t\u1ebf.<br \/>\n&#8211; Inox Cuong Thinh cung c\u1ea5p 2205\/2507 theo ASTM\/EN, ch\u1ee9ng ch\u1ec9 3.1, d\u1ecbch v\u1ee5 c\u1eaft\u2013u\u1ed1n\u2013h\u00e0n \u0111\u1ea1t chu\u1ea9n d\u1ef1 \u00e1n d\u1ea7u kh\u00ed.<\/p>\n<h2 id=\"toc-9-tai-lieu-tham-khao\">T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n<p>&#8211; ISO 15156 (NACE MR0175): Materials for use in H2S-containing environments in oil and gas production. https:\/\/www.iso.org\/standard\/51815.html<br \/>\n&#8211; ISO 21457: Materials selection and corrosion control for oil and gas production systems. https:\/\/www.iso.org\/standard\/39752.html<br \/>\n&#8211; NORSOK M-630\/M-650\/M-601 (Norwegian Petroleum Industry). https:\/\/www.standard.no<br \/>\n&#8211; ASTM A789\/A790\/A815\/A182\/A240 \u2013 Duplex and Super Duplex product specifications. https:\/\/www.astm.org<br \/>\n&#8211; DNV-RP-F112: Design of duplex stainless steels. https:\/\/rules.dnv.com<br \/>\n&#8211; Outokumpu Datasheet: 2205 and 2507 properties and PREN. https:\/\/www.outokumpu.com<br \/>\n&#8211; IMOA Duplex Stainless Steels: A Guide to Usage in Seawater. https:\/\/www.imoa.info<\/p>\n<h2 id=\"toc-10-ket-luan\">K\u1ebft lu\u1eadn<\/h2>\n<p>&#8211; Duplex 2205 v\u00e0 Super Duplex 2507\/S32760 l\u00e0 v\u1eadt li\u1ec7u then ch\u1ed1t cho d\u1ea7u kh\u00ed nh\u1edd c\u01b0\u1eddng \u0111\u1ed9 cao, ch\u1ed1ng r\u1ed7\/khe v\u01b0\u1ee3t tr\u1ed9i trong n\u01b0\u1edbc bi\u1ec3n v\u00e0 kh\u1ea3 n\u0103ng l\u00e0m vi\u1ec7c an to\u00e0n trong CO2\/H2S khi tu\u00e2n th\u1ee7 ISO 15156.<br \/>\n&#8211; Ch\u1ecdn \u0111\u00fang m\u00e1c theo PREN\/CPT, nhi\u1ec7t \u0111\u1ed9 v\u00e0 t\u00ednh ch\u1ea5t m\u00f4i tr\u01b0\u1eddng; d\u00f9ng Super Duplex cho seawater kh\u1eafc nghi\u1ec7t, 2205 cho sweet\/Cl\u2212 trung b\u00ecnh; v\u01b0\u1ee3t \u201cenvelope\u201d chuy\u1ec3n sang Super Duplex ho\u1eb7c Ni-base.<br \/>\n&#8211; Thi c\u00f4ng \u0111\u00fang: ki\u1ec3m so\u00e1t nhi\u1ec7t h\u00e0n, ch\u1ecdn v\u1eadt li\u1ec7u h\u00e0n t\u01b0\u01a1ng th\u00edch, pickling\u2013passivation v\u00e0 QA\/QC theo NORSOK\/ASTM l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 \u0111\u1ea1t tu\u1ed5i th\u1ecd thi\u1ebft k\u1ebf.<\/p>\n<p>C\u1ea7n t\u01b0 v\u1ea5n l\u1ef1a ch\u1ecdn m\u00e1c, ti\u00eau chu\u1ea9n v\u00e0 b\u00e1o gi\u00e1 nhanh cho d\u1ef1 \u00e1n d\u1ea7u kh\u00ed? Li\u00ean h\u1ec7 Inox Cuong Thinh \u2013 Hotline: 0343.417.281. Email: inoxcongnghiep.cuongthinh@gmail.com<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ph\u00e2n t\u00edch \u1ee9ng d\u1ee5ng c\u1ed1t l\u00f5i c\u1ee7a inox Duplex\/Super Duplex trong d\u1ea7u kh\u00ed: \u01b0u \u0111i\u1ec3m, m\u00e1c ti\u00eau bi\u1ec3u, ti\u00eau chu\u1ea9n ISO\/NORSOK, h\u00e0n, ki\u1ec3m so\u00e1t \u0103n m\u00f2n.<\/p>\n","protected":false},"author":7,"featured_media":1062,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-1778","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\/1778","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=1778"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/1778\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1062"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=1778"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=1778"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=1778"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}