{"id":1334,"date":"2025-11-20T12:35:31","date_gmt":"2025-11-20T05:35:31","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/chong-an-mon-bang-inox-cho-gian-khoan-va-cong-trinh-ngoai-khoi\/"},"modified":"2025-11-20T12:35:31","modified_gmt":"2025-11-20T05:35:31","slug":"chong-an-mon-bang-inox-cho-gian-khoan-va-cong-trinh-ngoai-khoi","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/chong-an-mon-bang-inox-cho-gian-khoan-va-cong-trinh-ngoai-khoi\/","title":{"rendered":"Ch\u1ed1ng \u0103n m\u00f2n b\u1eb1ng inox cho gi\u00e0n khoan v\u00e0 c\u00f4ng tr\u00ecnh ngo\u00e0i kh\u01a1i"},"content":{"rendered":"<div class=\"custom-toc\">\n<h3>N\u1ed9i dung ch\u00ednh<\/h3>\n<ul>\n<li><a href=\"#toc-0-vi-sao-inox-la-vat-lieu-chu-luc-ngoai-khoi\">V\u00ec sao inox l\u00e0 v\u1eadt li\u1ec7u ch\u1ee7 l\u1ef1c ngo\u00e0i kh\u01a1i?<\/a><\/li>\n<li><a href=\"#toc-1-co-che-an-mon-dien-hinh-tren-bien\">C\u01a1 ch\u1ebf \u0103n m\u00f2n \u0111i\u1ec3n h\u00ecnh tr\u00ean bi\u1ec3n<\/a><\/li>\n<li><a href=\"#toc-2-tieu-chi-chon-mac-inox-pren-nhiet-do-van-toc-va-ti\">Ti\u00eau ch\u00ed ch\u1ecdn m\u00e1c inox: PREN, nhi\u1ec7t \u0111\u1ed9, v\u1eadn t\u1ed1c v\u00e0 ti\u00eau chu\u1ea9n<\/a><\/li>\n<li><a href=\"#toc-3-khuyen-nghi-chon-mac-inox-theo-hang-muc-offshore\">Khuy\u1ebfn ngh\u1ecb ch\u1ecdn m\u00e1c inox theo h\u1ea1ng m\u1ee5c offshore<\/a><\/li>\n<li><a href=\"#toc-4-giai-phap-ket-hop-inox-phu-bao-ve-cp\">Gi\u1ea3i ph\u00e1p k\u1ebft h\u1ee3p: Inox + ph\u1ee7 b\u1ea3o v\u1ec7 + CP<\/a><\/li>\n<li><a href=\"#toc-5-thiet-ke-va-che-tao-inox-dung-cach-ngan-an-mon-tu-\">Thi\u1ebft k\u1ebf v\u00e0 ch\u1ebf t\u1ea1o inox \u0111\u00fang c\u00e1ch (ng\u0103n \u0103n m\u00f2n t\u1eeb g\u1ed1c)<\/a><\/li>\n<li><a href=\"#toc-6-dieu-kien-viet-nam-va-bai-hoc-thuc-te\">\u0110i\u1ec1u ki\u1ec7n Vi\u1ec7t Nam v\u00e0 b\u00e0i h\u1ecdc th\u1ef1c t\u1ebf<\/a><\/li>\n<li><a href=\"#toc-7-lua-chon-theo-chi-phi-vong-doi-lcc\">L\u1ef1a ch\u1ecdn theo chi ph\u00ed v\u00f2ng \u0111\u1eddi (LCC)<\/a><\/li>\n<li><a href=\"#toc-8-quy-trinh-trien-khai-chong-an-mon-bang-inox-de-xua\">Quy tr\u00ecnh tri\u1ec3n khai ch\u1ed1ng \u0103n m\u00f2n b\u1eb1ng inox (\u0111\u1ec1 xu\u1ea5t 7 b\u01b0\u1edbc)<\/a><\/li>\n<li><a href=\"#toc-9-thong-so-quy-cach-vat-tu-inox-ma-doanh-nghiep-tai-\">Th\u00f4ng s\u1ed1, quy c\u00e1ch v\u1eadt t\u01b0 inox m\u00e0 doanh nghi\u1ec7p t\u1ea1i Vi\u1ec7t Nam th\u01b0\u1eddng d\u00f9ng<\/a><\/li>\n<li><a href=\"#toc-10-kiem-tra-bao-tri-de-duy-tri-lop-thu-dong\">Ki\u1ec3m tra \u2013 b\u1ea3o tr\u00ec \u0111\u1ec3 duy tr\u00ec l\u1edbp th\u1ee5 \u0111\u1ed9ng<\/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>Trong c\u00f4ng nghi\u1ec7p n\u1eb7ng, \u0111\u1eb7c bi\u1ec7t n\u0103ng l\u01b0\u1ee3ng v\u00e0 \u0111\u00f3ng t\u00e0u, ch\u1ed1ng \u0103n m\u00f2n ngo\u00e0i kh\u01a1i quy\u1ebft \u0111\u1ecbnh \u0111\u1ed9 an to\u00e0n v\u00e0 chi ph\u00ed v\u00f2ng \u0111\u1eddi. B\u00e0i vi\u1ebft n\u00e0y t\u1eadp trung v\u00e0o gi\u1ea3i ph\u00e1p ch\u1ed1ng \u0103n m\u00f2n b\u1eb1ng inox cho gi\u00e0n khoan v\u00e0 c\u00f4ng tr\u00ecnh bi\u1ec3n Vi\u1ec7t Nam: c\u00e1ch ch\u1ecdn m\u00e1c th\u00e9p, thi\u1ebft k\u1ebf \u2013 ch\u1ebf t\u1ea1o \u0111\u00fang, k\u1ebft h\u1ee3p ph\u1ee7 b\u1ea3o v\u1ec7 v\u00e0 cathodic protection, k\u00e8m khuy\u1ebfn ngh\u1ecb ti\u00eau chu\u1ea9n v\u00e0 v\u1eadt t\u01b0 ph\u00f9 h\u1ee3p th\u1ecb tr\u01b0\u1eddng.<\/p>\n<h2 id=\"toc-0-vi-sao-inox-la-vat-lieu-chu-luc-ngoai-khoi\">V\u00ec sao inox l\u00e0 v\u1eadt li\u1ec7u ch\u1ee7 l\u1ef1c ngo\u00e0i kh\u01a1i?<\/h2>\n<p>&#8211; \u0110\u1ed9 b\u1ec1n \u0103n m\u00f2n cao trong m\u00f4i tr\u01b0\u1eddng Cl-; kh\u00f4ng c\u1ea7n s\u01a1n b\u1ea3o v\u1ec7 \u1edf nhi\u1ec1u h\u1ea1ng m\u1ee5c, gi\u1ea3m b\u1ea3o tr\u00ec.<br \/>\n&#8211; C\u01b0\u1eddng \u0111\u1ed9 cao (\u0111\u1eb7c bi\u1ec7t duplex\/super duplex) cho k\u1ebft c\u1ea5u g\u1ecdn nh\u1eb9, ch\u1ecbu t\u1ea3i \u0111\u1ed9ng t\u1ed1t.<br \/>\n&#8211; Tu\u1ed5i th\u1ecd d\u00e0i, gi\u1ea3m d\u1eebng m\u00e1y, ph\u00f9 h\u1ee3p chi\u1ebfn l\u01b0\u1ee3c LCC (Life-Cycle Cost) c\u1ee7a offshore.<\/p>\n<p>L\u01b0u \u00fd: kh\u00f4ng ph\u1ea3i m\u1ecdi inox \u0111\u1ec1u ph\u00f9 h\u1ee3p m\u1ecdi v\u00f9ng m\u00f4i tr\u01b0\u1eddng bi\u1ec3n; 316L th\u01b0\u1eddng th\u1ea5t b\u1ea1i nhanh \u1edf v\u00f9ng s\u00f3ng v\u1ed7 (splash\/tidal). Vi\u1ec7c l\u1ef1a ch\u1ecdn ph\u1ea3i d\u1ef1a tr\u00ean c\u01a1 ch\u1ebf \u0103n m\u00f2n v\u00e0 ti\u00eau chu\u1ea9n v\u1eadt li\u1ec7u d\u00e0nh cho d\u1ea7u kh\u00ed ngo\u00e0i kh\u01a1i.<\/p>\n<h2 id=\"toc-1-co-che-an-mon-dien-hinh-tren-bien\">C\u01a1 ch\u1ebf \u0103n m\u00f2n \u0111i\u1ec3n h\u00ecnh tr\u00ean bi\u1ec3n<\/h2>\n<p>&#8211; \u0102n m\u00f2n l\u1ed7 (pitting) do ion Cl-: k\u00edch ho\u1ea1t t\u1ea1i nhi\u1ec7t \u0111\u1ed9 cao, n\u01b0\u1edbc bi\u1ec3n \u1ea5m (Vi\u1ec7t Nam 28\u201332\u00b0C) l\u00e0m r\u1ee7i ro t\u0103ng.<br \/>\n&#8211; \u0102n m\u00f2n k\u1ebd h\u1edf (crevice) t\u1ea1i m\u1eb7t b\u00edch, v\u00f2ng \u0111\u1ec7m, k\u1eb9p treo, m\u1ed1i gh\u00e9p.<br \/>\n&#8211; \u0102n m\u00f2n \u0111i\u1ec7n h\u00f3a (galvanic) khi gh\u00e9p inox v\u1edbi th\u00e9p carbon, nh\u00f4m, \u0111\u1ed3ng\u2026 trong m\u00f4i tr\u01b0\u1eddng \u1ea9m \u01b0\u1edbt.<br \/>\n&#8211; N\u1ee9t do \u1ee9ng su\u1ea5t trong m\u00f4i tr\u01b0\u1eddng chloride (SCC) \u1edf th\u00e9p austenitic (v\u00ed d\u1ee5 304\/316) khi nhi\u1ec7t \u0111\u1ed9 >60\u00b0C.<br \/>\n&#8211; \u0102n m\u00f2n do vi sinh (MIC) trong h\u1ec7 n\u01b0\u1edbc bi\u1ec3n, b\u1ec3 c\u1ee9u h\u1ecfa.<br \/>\n&#8211; \u0102n m\u00f2n \u2013 x\u00f3i m\u00f2n \u1edf \u0111\u01b0\u1eddng \u1ed1ng c\u00f3 v\u1eadn t\u1ed1c cao, c\u00e1t, bong b\u00f3ng kh\u00ed.<\/p>\n<p>Ph\u00e2n v\u00f9ng m\u00f4i tr\u01b0\u1eddng:<br \/>\n&#8211; V\u00f9ng kh\u00ed quy\u1ec3n (kh\u00f4, s\u01b0\u01a1ng m\u1eb7n);<br \/>\n&#8211; V\u00f9ng s\u00f3ng v\u1ed7\/tri\u1ec1u (kh\u1eafc nghi\u1ec7t nh\u1ea5t, \u1ea9m \u2013 kh\u00f4 lu\u00e2n phi\u00ean, oxy nhi\u1ec1u);<br \/>\n&#8211; V\u00f9ng ng\u1eadp n\u01b0\u1edbc li\u00ean t\u1ee5c (submerged).<br \/>\nL\u1ef1a ch\u1ecdn inox thay \u0111\u1ed5i theo t\u1eebng v\u00f9ng.<\/p>\n<h2 id=\"toc-2-tieu-chi-chon-mac-inox-pren-nhiet-do-van-toc-va-ti\">Ti\u00eau ch\u00ed ch\u1ecdn m\u00e1c inox: PREN, nhi\u1ec7t \u0111\u1ed9, v\u1eadn t\u1ed1c v\u00e0 ti\u00eau chu\u1ea9n<\/h2>\n<h3>Ch\u1ec9 s\u1ed1 PREN<\/h3>\n<p>PREN \u2248 %Cr + 3.3\u00d7(%Mo + 0.5\u00d7%W) + 16\u00d7%N. PREN c\u00e0ng cao, kh\u1ea3 n\u0103ng ch\u1ed1ng pitting\/crevice c\u00e0ng t\u1ed1t trong n\u01b0\u1edbc bi\u1ec3n. Ng\u01b0\u1ee1ng tham kh\u1ea3o:<br \/>\n&#8211; 316L (PREN ~24): ch\u1ec9 n\u00ean d\u00f9ng v\u00f9ng kh\u00ed quy\u1ec3n s\u1ea1ch, tr\u00e1nh s\u00f3ng\/s\u01b0\u01a1ng m\u1eb7n d\u00e0y.<br \/>\n&#8211; 904L (PREN ~35): t\u1ed1t h\u01a1n 316L nh\u01b0ng v\u1eabn h\u1ea1n ch\u1ebf \u1edf splash zone.<br \/>\n&#8211; Duplex 2205 (UNS S32205, PREN ~34\u201336): d\u00f9ng t\u1ed1t cho n\u01b0\u1edbc bi\u1ec3n \u1ea5m, ph\u1ea7n l\u1edbn h\u1ea1ng m\u1ee5c ngo\u00e0i kh\u01a1i.<br \/>\n&#8211; Super duplex 2507 (S32750, PREN ~41\u201345): cho m\u00f4i tr\u01b0\u1eddng r\u1ea5t kh\u1eafc nghi\u1ec7t, nhi\u1ec7t \u0111\u1ed9 cao, v\u1eadn t\u1ed1c\/oxy cao.<br \/>\n&#8211; 6Mo\/si\u00eau austenitic (254SMO S31254, AL-6XN N08367, PREN ~43\u201347): cho n\u01b0\u1edbc bi\u1ec3n n\u00f3ng, x\u00e2m th\u1ef1c, thi\u1ebft b\u1ecb trao \u0111\u1ed5i nhi\u1ec7t.  <\/p>\n<h3>Ti\u00eau chu\u1ea9n \u0111\u1ecbnh h\u01b0\u1edbng<\/h3>\n<p>&#8211; ISO 21457 (l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u v\u00e0 ki\u1ec3m so\u00e1t \u0103n m\u00f2n cho d\u1ea7u kh\u00ed).<br \/>\n&#8211; NORSOK M-001 (l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u), M-501 (s\u01a1n\/ph\u1ee7 b\u1ea3o v\u1ec7).<br \/>\n&#8211; NACE MR0175\/ISO 15156 (m\u00f4i tr\u01b0\u1eddng H2S chua).<br \/>\n&#8211; DNVGL-RP-B401 (thi\u1ebft k\u1ebf cathodic protection).<br \/>\n&#8211; C\u00e1c ASTM cho s\u1ea3n ph\u1ea9m inox: A240 (t\u1ea5m), A312\/A269 (\u1ed1ng austenitic), A790 (\u1ed1ng duplex), A815 (ph\u1ee5 ki\u1ec7n duplex), A182 (m\u1eb7t b\u00edch).<\/p>\n<h2 id=\"toc-3-khuyen-nghi-chon-mac-inox-theo-hang-muc-offshore\">Khuy\u1ebfn ngh\u1ecb ch\u1ecdn m\u00e1c inox theo h\u1ea1ng m\u1ee5c offshore<\/h2>\n<p>&#8211; V\u00f9ng kh\u00ed quy\u1ec3n, kh\u00f4ng tr\u1ef1c ti\u1ebfp s\u01b0\u01a1ng m\u1eb7n: 316L\/304L c\u00f3 th\u1ec3 \u0111\u1ee7, nh\u01b0ng t\u1ea1i Vi\u1ec7t Nam n\u00ean \u01b0u ti\u00ean 316L ph\u1ee7 s\u01a1n ho\u1eb7c chuy\u1ec3n 2205 n\u1ebfu g\u1ea7n bi\u1ec3n\/spray.<br \/>\n&#8211; V\u00f9ng kh\u00ed quy\u1ec3n ven bi\u1ec3n v\u00e0 splash zone (\u0111i\u1ec3m n\u00f3ng \u0103n m\u00f2n): t\u1ed1i thi\u1ec3u duplex 2205; \u01b0u ti\u00ean 2507 ho\u1eb7c 6Mo cho tay v\u1ecbn, s\u00e0n grating, b\u00edch h\u1edf, k\u1eb9p treo, ch\u00e2n \u0111\u1ebf anten, k\u1ebft c\u1ea5u ph\u1ee5 tr\u1ee3.<br \/>\n&#8211; \u0110\u01b0\u1eddng \u1ed1ng n\u01b0\u1edbc bi\u1ec3n, h\u1ec7 c\u1ee9u h\u1ecfa (firewater ring main): 2507 l\u00e0 l\u1ef1a ch\u1ecdn chu\u1ea9n c\u00f4ng nghi\u1ec7p; 2205 c\u00f3 th\u1ec3 d\u00f9ng cho \u00e1p l\u1ef1c\/\u0111i\u1ec1u ki\u1ec7n nh\u1eb9 h\u01a1n; 6Mo khi nhi\u1ec7t \u0111\u1ed9 cao ho\u1eb7c fouling n\u1eb7ng.<br \/>\n&#8211; B\u01a1m n\u01b0\u1edbc bi\u1ec3n, b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t: 6Mo ho\u1eb7c titanium; duplex\/2507 cho v\u1ecf, b\u1ed9 ph\u1eadn \u00edt nh\u1ea1y c\u1ea3m.<br \/>\n&#8211; Bul\u00f4ng\/\u1ed1c v\u00edt: c\u1ea5p h\u1ee3p kim b\u1eb1ng ho\u1eb7c cao h\u01a1n v\u1eadt li\u1ec7u n\u1ec1n; tr\u00e1nh d\u00f9ng 316 tr\u00ean n\u1ec1n 2205. S\u1eed d\u1ee5ng fastener 2205\/2507, ch\u1ed1ng k\u1eb9t ren b\u1eb1ng keo b\u00f4i tr\u01a1n ph\u00f9 h\u1ee3p.<br \/>\n&#8211; T\u1ee7 \u0111i\u1ec7n, thang c\u00e1p: 316L s\u01a1n ph\u1ee7 ho\u1eb7c 2205 kh\u00f4ng s\u01a1n cho tu\u1ed5i th\u1ecd d\u00e0i h\u01a1n.<br \/>\n&#8211; Cladding\/overlay: v\u1edbi \u0111\u01b0\u1eddng \u1ed1ng\/khoang \u00e1p l\u1ef1c l\u1edbn, c\u00e2n nh\u1eafc th\u00e9p carbon clad l\u1edbp inox 2205\/2507\/6Mo \u0111\u1ec3 t\u1ed1i \u01b0u chi ph\u00ed.<\/p>\n<h2 id=\"toc-4-giai-phap-ket-hop-inox-phu-bao-ve-cp\">Gi\u1ea3i ph\u00e1p k\u1ebft h\u1ee3p: Inox + ph\u1ee7 b\u1ea3o v\u1ec7 + CP<\/h2>\n<h3>Thermal Spray Aluminum (TSA)<\/h3>\n<p>&#8211; Phun ph\u1ee7 nh\u00f4m nhi\u1ec7t 250\u2013400 \u00b5m (theo NORSOK M-501) cho splash zone gi\u00fap t\u0103ng tu\u1ed5i th\u1ecd >20\u201330 n\u0103m, \u0111\u1eb7c bi\u1ec7t tr\u00ean b\u1ec1 m\u1eb7t ph\u1ee9c t\u1ea1p, m\u1ed1i gh\u00e9p.<br \/>\n&#8211; TSA k\u1ebft h\u1ee3p v\u1edbi inox \u1edf v\u00f9ng ch\u1ecbu phun m\u1eb7n li\u00ean t\u1ee5c l\u00e0 c\u1ea5u h\u00ecnh \u201cb\u1ec1n \u2013 \u00edt b\u1ea3o tr\u00ec\u201d \u0111\u01b0\u1ee3c nhi\u1ec1u nh\u00e0 khai th\u00e1c \u00e1p d\u1ee5ng.<\/p>\n<h3>Cathodic Protection (CP)<\/h3>\n<p>&#8211; Thi\u1ebft k\u1ebf theo DNVGL-RP-B401: th\u1ebf b\u1ea3o v\u1ec7 m\u1ee5c ti\u00eau th\u01b0\u1eddng kho\u1ea3ng -0.80 \u0111\u1ebfn -1.05 V (Ag\/AgCl\/Seawater).<br \/>\n&#8211; D\u00f9ng anode hy sinh Al-Zn-In cho k\u1ebft c\u1ea5u ng\u1eadp n\u01b0\u1edbc; ICCP cho di\u1ec7n t\u00edch l\u1edbn.<br \/>\n&#8211; Ch\u00fa \u00fd gi\u00f2n hydro: duplex v\u00e0 austenitic n\u00f3i chung an to\u00e0n \u1edf m\u1ee9c th\u1ebf CP khuy\u1ebfn ngh\u1ecb; tr\u00e1nh \u00e1p qu\u00e1 \u00e2m cho th\u00e9p martensitic\/v\u1eadt li\u1ec7u c\u01b0\u1eddng \u0111\u1ed9 r\u1ea5t cao.<\/p>\n<h3>S\u01a1n c\u00f4ng nghi\u1ec7p<\/h3>\n<p>&#8211; V\u1edbi inox austenitic s\u1eed d\u1ee5ng s\u01a1n c\u00f3 chu\u1ea9n b\u00e1m d\u00ednh cho b\u1ec1 m\u1eb7t inert; s\u01a1n ch\u1ee7 y\u1ebfu \u0111\u1ec3 gi\u1ea3m b\u00e1m b\u1ea9n\/crevice t\u1ea1i k\u1eb9p treo, kh\u00f4ng thay th\u1ebf ch\u1ecdn m\u00e1c \u0111\u00fang.<\/p>\n<h2 id=\"toc-5-thiet-ke-va-che-tao-inox-dung-cach-ngan-an-mon-tu-\">Thi\u1ebft k\u1ebf v\u00e0 ch\u1ebf t\u1ea1o inox \u0111\u00fang c\u00e1ch (ng\u0103n \u0103n m\u00f2n t\u1eeb g\u1ed1c)<\/h2>\n<h3>Thi\u1ebft k\u1ebf c\u01a1 kh\u00ed<\/h3>\n<p>&#8211; Gi\u1ea3m k\u1ebd h\u1edf: d\u00f9ng h\u00e0n k\u00edn thay v\u00ec bul\u00f4ng \u1edf v\u00f9ng splash; tr\u00e1nh \u201ct\u00fai n\u01b0\u1edbc\u201d, \u01b0u ti\u00ean b\u1ec1 m\u1eb7t tho\u00e1t n\u01b0\u1edbc.<br \/>\n&#8211; C\u00e1ch ly \u0111i\u1ec7n: ch\u00e8n v\u1eadt li\u1ec7u c\u00e1ch \u0111i\u1ec7n gi\u1eefa inox v\u00e0 kim lo\u1ea1i k\u00e9m \u0111i\u1ec7n th\u1ebf h\u01a1n (th\u00e9p carbon, nh\u00f4m, \u0111\u1ed3ng); d\u00f9ng b\u1ed9 kit c\u00e1ch \u0111i\u1ec7n cho m\u1eb7t b\u00edch.<br \/>\n&#8211; Gasket: \u01b0u ti\u00ean PTFE\/virgin PTFE ho\u1eb7c PTFE b\u1ecdc, h\u1ea1n ch\u1ebf EPDM\/NBR t\u1ea1o k\u1ebd \u1ea9m l\u00e2u ng\u00e0y.<br \/>\n&#8211; Fastener: ch\u1ecdn c\u00f9ng h\u1ec7 h\u1ee3p kim; d\u00f9ng keo ch\u1ed1ng k\u1eb9t (anti-galling) tr\u00ean ren inox.<\/p>\n<h3>H\u00e0n v\u00e0 x\u1eed l\u00fd b\u1ec1 m\u1eb7t<\/h3>\n<p>&#8211; Duplex 2205\/2507: ki\u1ec3m so\u00e1t nhi\u1ec7t v\u00e0o 0.5\u20132.5 kJ\/mm; nhi\u1ec7t \u0111\u1ed9 gi\u1eefa \u0111\u01b0\u1eddng h\u00e0n <150\u00b0C; que h\u00e0n ER2209\/2594 t\u01b0\u01a1ng \u1ee9ng; ki\u1ec3m tra ferrite 30\u201370% v\u00f9ng h\u00e0n.  \n- Austenitic 316\/6Mo: tr\u00e1nh nung l\u00e2u \u1edf 550\u2013800\u00b0C; d\u00f9ng filler t\u01b0\u01a1ng th\u00edch (v\u00ed d\u1ee5 625 cho 6Mo trong v\u00e0i \u1ee9ng d\u1ee5ng).  \n- T\u1ea9y g\u1ec9 \u2013 th\u1ee5 \u0111\u1ed9ng h\u00f3a theo ASTM A380\/A967; lo\u1ea1i b\u1ecf \u201cheat tint\u201d, s\u1eaft t\u1ef1 do \u0111\u1ec3 ph\u1ee5c h\u1ed3i l\u1edbp m\u00e0ng th\u1ee5 \u0111\u1ed9ng.  \n- Tr\u00e1nh nhi\u1ec5m s\u1eaft: d\u00f9ng d\u1ee5ng c\u1ee5 ri\u00eang cho inox, ph\u1ee7 b\u1ea3o v\u1ec7 trong x\u01b0\u1edfng.\n\n\n\n<h2 id=\"toc-6-dieu-kien-viet-nam-va-bai-hoc-thuc-te\">\u0110i\u1ec1u ki\u1ec7n Vi\u1ec7t Nam v\u00e0 b\u00e0i h\u1ecdc th\u1ef1c t\u1ebf<\/h2>\n<p>&#8211; N\u01b0\u1edbc bi\u1ec3n \u1ea5m 28\u201332\u00b0C, \u0111\u1ed9 m\u1eb7n cao, tia UV m\u1ea1nh, chu k\u1ef3 \u1ea9m \u2013 kh\u00f4 d\u00e0y khi\u1ebfn 316L nhanh pitting\/crevice \u1edf khu v\u1ef1c h\u1eaft s\u00f3ng, th\u01b0\u1eddng ch\u1ec9 sau 6\u201324 th\u00e1ng.<br \/>\n&#8211; Duplex 2205 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t cho h\u1ea7u h\u1ebft tay v\u1ecbn, s\u00e0n thao t\u00e1c, thang, gi\u00e1 \u0111\u1ee1, \u1ed1ng d\u1eabn ph\u1ee5; super duplex 2507 ph\u00f9 h\u1ee3p \u0111\u01b0\u1eddng \u1ed1ng n\u01b0\u1edbc bi\u1ec3n, firewater, manifold; 6Mo cho b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t, cu\u1ed9n l\u00e0m m\u00e1t, thi\u1ebft b\u1ecb ph\u1ee5 nhi\u1ec7t \u0111\u1ed9 cao.<br \/>\n&#8211; TSA + CP cho m\u1ecdi b\u1ec1 m\u1eb7t splash zone gi\u00fap t\u0103ng tu\u1ed5i th\u1ecd v\u01b0\u1ee3t k\u1ebf ho\u1ea1ch b\u1ea3o tr\u00ec 20 n\u0103m.<\/p>\n<p>V\u00ed d\u1ee5 c\u1ea5u h\u00ecnh khuy\u1ebfn ngh\u1ecb cho gi\u00e0n \u0111\u1ea7u gi\u1ebfng:<br \/>\n&#8211; Handrail, grating, cable tray trong splash: 2205 phun TSA t\u1ea1i m\u1ed1i gh\u00e9p; bul\u00f4ng 2205\/2507.<br \/>\n&#8211; Firewater ring main: 2507 theo ASTM A790\/A815\/A182; m\u1eb7t b\u00edch c\u00e1ch \u0111i\u1ec7n; CP thi\u1ebft k\u1ebf \u0111\u1ed3ng b\u1ed9.<br \/>\n&#8211; Piping n\u01b0\u1edbc bi\u1ec3n ph\u1ee5 tr\u1ee3: 2205 cho nhi\u1ec7t \u0111\u1ed9\/v\u1eadn t\u1ed1c trung b\u00ecnh; 6Mo n\u1ebfu n\u01b0\u1edbc \u1ea5m, v\u1eadn t\u1ed1c cao ho\u1eb7c chlorination li\u00ean t\u1ee5c.<br \/>\n&#8211; Skid b\u01a1m n\u01b0\u1edbc bi\u1ec3n: th\u00e2n b\u01a1m super duplex ho\u1eb7c 6Mo; bolt 2507; l\u1edbp TSA\/epoxy ch\u1ed1ng crevice.<\/p>\n<h2 id=\"toc-7-lua-chon-theo-chi-phi-vong-doi-lcc\">L\u1ef1a ch\u1ecdn theo chi ph\u00ed v\u00f2ng \u0111\u1eddi (LCC)<\/h2>\n<p>&#8211; Chi ph\u00ed v\u1eadt li\u1ec7u tham kh\u1ea3o (bi\u1ebfn \u0111\u1ed9ng theo th\u1ecb tr\u01b0\u1eddng): 316L ~1.0x; 2205 ~1.3\u20131.6x; 2507 ~2.0\u20132.5x; 6Mo ~3.0\u20134.0x.<br \/>\n&#8211; Tuy nhi\u00ean, t\u00ednh c\u1ea3 s\u01a1n, d\u1eebng m\u00e1y, thay th\u1ebf v\u00e0 r\u1ee7i ro an to\u00e0n, 2205\/2507 th\u01b0\u1eddng cho LCC th\u1ea5p h\u01a1n 316L trong 15\u201325 n\u0103m v\u1eadn h\u00e0nh ngo\u00e0i kh\u01a1i.<br \/>\n&#8211; V\u1edbi k\u1ebft c\u1ea5u l\u1edbn, gi\u1ea3i ph\u00e1p th\u00e9p carbon + clad inox (2205\/2507\/6Mo) gi\u1ea3m CAPEX nh\u01b0ng v\u1eabn \u0111\u1ea3m b\u1ea3o b\u1ec1n \u0103n m\u00f2n \u1edf b\u1ec1 m\u1eb7t ti\u1ebfp x\u00fac n\u01b0\u1edbc bi\u1ec3n.<\/p>\n<h2 id=\"toc-8-quy-trinh-trien-khai-chong-an-mon-bang-inox-de-xua\">Quy tr\u00ecnh tri\u1ec3n khai ch\u1ed1ng \u0103n m\u00f2n b\u1eb1ng inox (\u0111\u1ec1 xu\u1ea5t 7 b\u01b0\u1edbc)<\/h2>\n<p>1) Kh\u1ea3o s\u00e1t m\u00f4i tr\u01b0\u1eddng: nhi\u1ec7t \u0111\u1ed9, Cl-, t\u1ed1c \u0111\u1ed9 d\u00f2ng, b\u00f9n\/c\u00e1t, c\u00f3 H2S hay kh\u00f4ng (sour service).<br \/>\n2) L\u1ef1a ch\u1ecdn m\u00e1c theo ISO 21457\/NORSOK M-001 v\u00e0 PREN m\u1ee5c ti\u00eau.<br \/>\n3) X\u00e1c \u0111\u1ecbnh chi\u1ebfn l\u01b0\u1ee3c ph\u1ee7 v\u00e0 CP cho t\u1eebng v\u00f9ng (DNVGL-RP-B401, NORSOK M-501).<br \/>\n4) Thi\u1ebft k\u1ebf chi ti\u1ebft lo\u1ea1i tr\u1eeb k\u1ebd h\u1edf, c\u00e1ch ly \u0111i\u1ec7n, ch\u1ecdn gasket\/fastener t\u01b0\u01a1ng th\u00edch.<br \/>\n5) Quy \u0111\u1ecbnh ch\u1ebf t\u1ea1o: quy tr\u00ecnh h\u00e0n (WPS\/PQR), ki\u1ec3m so\u00e1t nhi\u1ec7t, pickling\/passivation, QC NDT.<br \/>\n6) Nghi\u1ec7m thu: MTC 3.1\/3.2, PMI, ferrite check, th\u1eed \u00e1p, ki\u1ec3m tra s\u01a1n\/ph\u1ee7, \u0111o th\u1ebf CP.<br \/>\n7) V\u1eadn h\u00e0nh \u2013 b\u1ea3o tr\u00ec: v\u1ec7 sinh \u0111\u1ecbnh k\u1ef3, biocide\/chlorination ki\u1ec3m so\u00e1t MIC, ki\u1ec3m tra ROV\/\u0111\u1ecbnh k\u1ef3 b\u1ec1 m\u1eb7t splash.<\/p>\n<h2 id=\"toc-9-thong-so-quy-cach-vat-tu-inox-ma-doanh-nghiep-tai-\">Th\u00f4ng s\u1ed1, quy c\u00e1ch v\u1eadt t\u01b0 inox m\u00e0 doanh nghi\u1ec7p t\u1ea1i Vi\u1ec7t Nam th\u01b0\u1eddng d\u00f9ng<\/h2>\n<p>&#8211; T\u1ea5m 2205\/2507: ASTM A240, d\u00e0y 3\u201340 mm cho k\u1ebft c\u1ea5u, b\u00edch, b\u1ec7 \u0111\u1ee1.<br \/>\n&#8211; \u1ed0ng 2205: ASTM A790 (SCH 10\u201380) DN15\u2013DN300; ph\u1ee5 ki\u1ec7n A815; m\u1eb7t b\u00edch A182 F51.<br \/>\n&#8211; \u1ed0ng 2507: ASTM A790 (SCH 10\u201380) cho firewater\/n\u01b0\u1edbc bi\u1ec3n; ph\u1ee5 ki\u1ec7n A815; m\u1eb7t b\u00edch A182 F53\/F55.<br \/>\n&#8211; 6Mo (S31254): \u1ed0ng ASTM A312\/A269 cho trao \u0111\u1ed5i nhi\u1ec7t, cu\u1ed9n \u0111\u01b0\u1eddng \u1ed1ng; ph\u1ee5 ki\u1ec7n A403 WPS31254.<br \/>\n&#8211; Bul\u00f4ng\/ty ren: thanh tr\u00f2n ASTM A479 (2205\/2507) gia c\u00f4ng theo b\u1ea3n v\u1ebd; d\u00f9ng l\u1edbp ph\u1ee7 ch\u1ed1ng k\u1eb9t.<br \/>\n&#8211; V\u1eadt t\u01b0 c\u00e1ch \u0111i\u1ec7n, gasket PTFE, b\u1ed9 kit c\u00e1ch \u0111i\u1ec7n m\u1eb7t b\u00edch cho ch\u1ed1ng galvanic.<br \/>\nT\u1ea5t c\u1ea3 n\u00ean c\u00f3 MTC, PMI, v\u00e0 quy tr\u00ecnh h\u00e0n \u2013 pickling \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t.<\/p>\n<h2 id=\"toc-10-kiem-tra-bao-tri-de-duy-tri-lop-thu-dong\">Ki\u1ec3m tra \u2013 b\u1ea3o tr\u00ec \u0111\u1ec3 duy tr\u00ec l\u1edbp th\u1ee5 \u0111\u1ed9ng<\/h2>\n<p>&#8211; R\u1eeda n\u01b0\u1edbc ng\u1ecdt \u0111\u1ecbnh k\u1ef3 \u1edf k\u1ebft c\u1ea5u tr\u00ean boong \u0111\u1ec3 gi\u1ea3m mu\u1ed1i \u0111\u1ecdng.<br \/>\n&#8211; Soi m\u1ed1i gh\u00e9p\/k\u1eb9p treo, x\u1eed l\u00fd k\u1ebd h\u1edf; thay gasket l\u00e3o h\u00f3a.<br \/>\n&#8211; L\u00e0m s\u1ea1ch c\u1eb7n sinh h\u1ecdc trong \u0111\u01b0\u1eddng \u1ed1ng n\u01b0\u1edbc bi\u1ec3n, ki\u1ec3m so\u00e1t MIC b\u1eb1ng chlorination duy tr\u00ec 0.5\u20131 mg\/L d\u01b0, theo khuy\u1ebfn ngh\u1ecb v\u1eadn h\u00e0nh.<br \/>\n&#8211; Theo d\u00f5i th\u1ebf CP, thay anode khi suy gi\u1ea3m theo t\u00ednh to\u00e1n.<\/p>\n<h2 id=\"toc-11-nguon-tham-khao\">Ngu\u1ed3n tham kh\u1ea3o<\/h2>\n<p>&#8211; ISO 21457: Materials selection and corrosion control for oil and gas.<br \/>\n&#8211; NORSOK M-001 (Materials selection), NORSOK M-501 (Surface preparation and protective coating).<br \/>\n&#8211; DNVGL-RP-B401: Cathodic protection design.<br \/>\n&#8211; NACE MR0175\/ISO 15156: Materials in H2S-containing environments.<br \/>\n&#8211; Nickel Institute Publication \u201cStainless Steels in Seawater\u201d.<br \/>\n&#8211; IMOA: Guidelines for selection of stainless steels for seawater.<br \/>\n&#8211; Outokumpu Corrosion Handbook.<br \/>\n&#8211; ASTM A240, A312\/A269, A790, A815, A182, A380\/A967 (x\u1eed l\u00fd b\u1ec1 m\u1eb7t).<\/p>\n<h2 id=\"toc-12-ket-luan\">K\u1ebft lu\u1eadn<\/h2>\n<p>&#8211; Mu\u1ed1n b\u1ec1n ngo\u00e0i kh\u01a1i, ph\u1ea3i k\u1ebft h\u1ee3p: ch\u1ecdn \u0111\u00fang m\u00e1c inox theo PREN v\u00e0 ti\u00eau chu\u1ea9n (\u01b0u ti\u00ean 2205\/2507, 6Mo cho n\u01b0\u1edbc bi\u1ec3n \u1ea5m), thi\u1ebft k\u1ebf lo\u1ea1i tr\u1eeb k\u1ebd h\u1edf \u2013 c\u00e1ch ly \u0111i\u1ec7n, h\u00e0n \u0111\u00fang quy tr\u00ecnh v\u00e0 x\u1eed l\u00fd b\u1ec1 m\u1eb7t, c\u1ed9ng v\u1edbi TSA v\u00e0 cathodic protection \u1edf v\u00f9ng splash\/submerged.<br \/>\n&#8211; V\u1edbi \u0111i\u1ec1u ki\u1ec7n Vi\u1ec7t Nam, 316L ch\u1ec9 c\u00f2n vai tr\u00f2 h\u1ea1n ch\u1ebf; 2205 l\u00e0 \u201cx\u01b0\u01a1ng s\u1ed1ng\u201d, 2507 v\u00e0 6Mo cho c\u00e1c d\u1ecbch v\u1ee5 kh\u1eafc nghi\u1ec7t nh\u01b0 n\u01b0\u1edbc bi\u1ec3n v\u00e0 firewater.<br \/>\n&#8211; \u00c1p d\u1ee5ng \u0111\u00fang s\u1ebd gi\u1ea3m CAPEX\/BOM l\u00e3ng ph\u00ed, t\u1ed1i \u01b0u LCC v\u00e0 n\u00e2ng cao \u0111\u1ed9 tin c\u1eady c\u00f4ng tr\u00ecnh 20\u201330 n\u0103m.<\/p>\n<p>C\u1ea7n t\u01b0 v\u1ea5n chi ti\u1ebft theo d\u1ef1 \u00e1n, ti\u00eau chu\u1ea9n v\u00e0 ti\u1ebfn \u0111\u1ed9 cung \u1ee9ng? Li\u00ean h\u1ec7 Inox C\u01b0\u1eddng Th\u1ecbnh \u0111\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t v\u1eadt li\u1ec7u, quy c\u00e1ch v\u00e0 b\u00e1o gi\u00e1 t\u1ed1t nh\u1ea5t. Hotline: 0343.417.281. Email: inoxcongnghiep.cuongthinh@gmail.com<\/p>\n","protected":false},"excerpt":{"rendered":"<p>H\u01b0\u1edbng d\u1eabn ch\u1ecdn m\u00e1c inox, thi\u1ebft k\u1ebf h\u00e0n, ph\u1ee7 TSA v\u00e0 cathodic protection cho gi\u00e0n khoan\/c\u00f4ng tr\u00ecnh bi\u1ec3n. Khuy\u1ebfn ngh\u1ecb 2205\/2507, 6Mo, theo ISO\/NORSOK.<\/p>\n","protected":false},"author":7,"featured_media":1053,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-1334","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\/1334","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=1334"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/1334\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1053"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=1334"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=1334"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=1334"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}