{"id":2228,"date":"2026-07-06T00:34:07","date_gmt":"2026-07-05T17:34:07","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/inox-chong-an-mon-hieu-qua-cho-gian-khoan-va-cong-trinh-ngoai-khoi\/"},"modified":"2026-07-06T00:34:07","modified_gmt":"2026-07-05T17:34:07","slug":"inox-chong-an-mon-hieu-qua-cho-gian-khoan-va-cong-trinh-ngoai-khoi","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/inox-chong-an-mon-hieu-qua-cho-gian-khoan-va-cong-trinh-ngoai-khoi\/","title":{"rendered":"Inox ch\u1ed1ng \u0103n m\u00f2n hi\u1ec7u qu\u1ea3 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-tac-nhan-an-mon-chu-dao-o-moi-truong-bien\">T\u00e1c nh\u00e2n \u0103n m\u00f2n ch\u1ee7 \u0111\u1ea1o \u1edf m\u00f4i tr\u01b0\u1eddng bi\u1ec3n<\/a><\/li>\n<li><a href=\"#toc-1-chon-mac-inox-theo-moi-truong-nhiet-do-va-rui-ro-k\">Ch\u1ecdn m\u00e1c inox theo m\u00f4i tr\u01b0\u1eddng, nhi\u1ec7t \u0111\u1ed9 v\u00e0 r\u1ee7i ro k\u1ebd h\u1edf<\/a><\/li>\n<li><a href=\"#toc-2-tieu-chuan-quy-pham-nen-ap-dung\">Ti\u00eau chu\u1ea9n, quy ph\u1ea1m n\u00ean \u00e1p d\u1ee5ng<\/a><\/li>\n<li><a href=\"#toc-3-chien-luoc-chong-an-mon-tich-hop-cho-ngoai-khoi\">Chi\u1ebfn l\u01b0\u1ee3c ch\u1ed1ng \u0103n m\u00f2n t\u00edch h\u1ee3p cho ngo\u00e0i kh\u01a1i<\/a><\/li>\n<li><a href=\"#toc-4-han-gia-cong-va-xu-ly-be-mat-inox-cho-moi-truong-b\">H\u00e0n, gia c\u00f4ng v\u00e0 x\u1eed l\u00fd b\u1ec1 m\u1eb7t inox cho m\u00f4i tr\u01b0\u1eddng bi\u1ec3n<\/a><\/li>\n<li><a href=\"#toc-5-ung-dung-khuyen-nghi-theo-hang-muc\">\u1ee8ng d\u1ee5ng khuy\u1ebfn ngh\u1ecb theo h\u1ea1ng m\u1ee5c<\/a><\/li>\n<li><a href=\"#toc-6-so-sanh-chi-phi-vong-doi-lcc-dien-hinh\">So s\u00e1nh chi ph\u00ed v\u00f2ng \u0111\u1eddi (LCC) \u0111i\u1ec3n h\u00ecnh<\/a><\/li>\n<li><a href=\"#toc-7-kiem-tra-va-bao-tri-trong-van-hanh\">Ki\u1ec3m tra v\u00e0 b\u1ea3o tr\u00ec trong v\u1eadn h\u00e0nh<\/a><\/li>\n<li><a href=\"#toc-8-dai-san-pham-inox-phu-hop-cho-ngoai-khoi\">D\u1ea3i s\u1ea3n ph\u1ea9m inox ph\u00f9 h\u1ee3p cho ngo\u00e0i kh\u01a1i<\/a><\/li>\n<li><a href=\"#toc-9-cau-hoi-thuong-gap\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/a><\/li>\n<li><a href=\"#toc-10-tai-lieu-tham-khao\">T\u00e0i li\u1ec7u tham kh\u1ea3o<\/a><\/li>\n<li><a href=\"#toc-11-ket-luan\">K\u1ebft lu\u1eadn<\/a><\/li>\n<\/ul>\n<\/div>\n<p>Inox l\u00e0 v\u1eadt li\u1ec7u n\u00f2ng c\u1ed1t trong c\u00f4ng nghi\u1ec7p n\u1eb7ng (h\u00f3a ch\u1ea5t, n\u0103ng l\u01b0\u1ee3ng, \u0111\u00f3ng t\u00e0u), \u0111\u1eb7c bi\u1ec7t \u1edf c\u00e1c gi\u00e0n khoan v\u00e0 c\u00f4ng tr\u00ecnh ngo\u00e0i kh\u01a1i n\u01a1i m\u00f4i tr\u01b0\u1eddng chloride kh\u1eafc nghi\u1ec7t \u0111\u00f2i h\u1ecfi gi\u1ea3i ph\u00e1p ch\u1ed1ng \u0103n m\u00f2n tin c\u1eady trong 20\u201330 n\u0103m. B\u00e0i vi\u1ebft n\u00e0y cung c\u1ea5p h\u01b0\u1edbng d\u1eabn \u0111\u1ea7y \u0111\u1ee7 \u0111\u1ec3 l\u1ef1a ch\u1ecdn m\u00e1c inox, c\u1ea5u h\u00ecnh h\u1ec7 th\u1ed1ng ch\u1ed1ng \u0103n m\u00f2n, thi c\u00f4ng h\u00e0n\u2013gia c\u00f4ng \u0111\u00fang chu\u1ea9n, v\u00e0 b\u1ea3o tr\u00ec nh\u1eb1m \u0111\u1ea1t \u0111\u1ed9 b\u1ec1n l\u00e2u d\u00e0i v\u1edbi chi ph\u00ed v\u00f2ng \u0111\u1eddi t\u1ed1i \u01b0u.<\/p>\n<h2 id=\"toc-0-tac-nhan-an-mon-chu-dao-o-moi-truong-bien\">T\u00e1c nh\u00e2n \u0103n m\u00f2n ch\u1ee7 \u0111\u1ea1o \u1edf m\u00f4i tr\u01b0\u1eddng bi\u1ec3n<\/h2>\n<p>&#8211; \u0102n m\u00f2n k\u1ebd h\u1edf v\u00e0 r\u1ed7 do chloride: x\u1ea3y ra m\u1ea1nh t\u1ea1i v\u00f9ng b\u1eafn t\u00f3e (splash zone), m\u1eb7t b\u00edch, bu-l\u00f4ng, m\u1ed1i gh\u00e9p c\u00f3 k\u1ebd h\u1edf ho\u1eb7c c\u1eb7n b\u00e1m sinh h\u1ecdc.<br \/>\n&#8211; \u0102n m\u00f2n khe n\u1ee9t do \u1ee9ng su\u1ea5t (Cl\u2013SCC): austenitic nh\u01b0 304\/316 d\u1ec5 nh\u1ea1y c\u1ea3m khi T > 60 \u00b0C, \u1ee9ng su\u1ea5t k\u00e9o cao v\u00e0 n\u1ed3ng \u0111\u1ed9 Cl\u2013 l\u1edbn.<br \/>\n&#8211; \u0102n m\u00f2n galvanic: khi inox gh\u00e9p v\u1edbi kim lo\u1ea1i kh\u00e1c (th\u00e9p carbon, CuNi, nh\u00f4m) trong n\u01b0\u1edbc bi\u1ec3n d\u1eabn \u0111\u1ebfn ch\u00eanh th\u1ebf \u0111i\u1ec7n c\u1ef1c; c\u1ea7n t\u00e1ch \u0111i\u1ec7n ho\u1eb7c c\u00e2n \u0111\u1ed1i t\u1ef7 l\u1ec7 di\u1ec7n t\u00edch.<br \/>\n&#8211; \u1ea2nh h\u01b0\u1edfng v\u00f9ng:<br \/>\n  + V\u00f9ng kh\u00ed quy\u1ec3n ven bi\u1ec3n: mu\u1ed1i \u0111\u1ecdng, \u1ea9m cao.<br \/>\n  + V\u00f9ng b\u1eafn t\u00f3e\/tri\u1ec1u: \u01b0\u1edbt\u2013kh\u00f4 lu\u00e2n phi\u00ean, oxy v\u00e0 chloride cao nh\u1ea5t, kh\u1eafc nghi\u1ec7t nh\u1ea5t.<br \/>\n  + V\u00f9ng ng\u1eadp n\u01b0\u1edbc bi\u1ec3n: oxy h\u00f2a tan th\u1ea5p h\u01a1n, c\u00f3 th\u1ec3 d\u00f9ng b\u1ea3o v\u1ec7 catot.<br \/>\n  + D\u1ecbch v\u1ee5 d\u1ea7u kh\u00ed (H2S\/CO2, \u201csour\u201d): y\u00eau c\u1ea7u theo NACE MR0175\/ISO 15156.<\/p>\n<h2 id=\"toc-1-chon-mac-inox-theo-moi-truong-nhiet-do-va-rui-ro-k\">Ch\u1ecdn m\u00e1c inox theo m\u00f4i tr\u01b0\u1eddng, nhi\u1ec7t \u0111\u1ed9 v\u00e0 r\u1ee7i ro k\u1ebd h\u1edf<\/h2>\n<p>Nguy\u00ean t\u1eafc n\u1ec1n t\u1ea3ng: d\u00f9ng PREN \u0111\u1ec3 so s\u00e1nh kh\u1ea3 n\u0103ng ch\u1ed1ng r\u1ed7\/k\u1ebd h\u1edf trong n\u01b0\u1edbc bi\u1ec3n. C\u00f4ng th\u1ee9c g\u1ea7n \u0111\u00fang: PREN = %Cr + 3,3\u00d7%Mo + 16\u00d7%N.<br \/>\n&#8211; 304\/304L: PREN ~ 18\u201319. Kh\u00f4ng khuy\u1ebfn ngh\u1ecb cho n\u01b0\u1edbc bi\u1ec3n.<br \/>\n&#8211; 316\/316L: PREN ~ 23\u201324. Ch\u1ec9 ch\u1ea5p nh\u1eadn h\u1ea1n ch\u1ebf \u1edf kh\u00ed quy\u1ec3n ven bi\u1ec3n, c\u1ea5u ki\u1ec7n s\u1ea1ch, b\u1ec1 m\u1eb7t m\u1ecbn, kh\u00f4ng k\u1ebd h\u1edf; kh\u00f4ng ph\u00f9 h\u1ee3p splash zone.<br \/>\n&#8211; 317L\/904L: PREN ~ 27\u201335. C\u1ea3i thi\u1ec7n so v\u1edbi 316L nh\u01b0ng v\u1eabn r\u1ee7i ro trong splash zone\/\u1ea5m.<br \/>\n&#8211; Duplex 2205 (UNS S32205\/S31803): PREN ~ 34\u201336. Khuy\u1ebfn ngh\u1ecb cho h\u1ec7 n\u01b0\u1edbc bi\u1ec3n, splash zone, k\u1ebft c\u1ea5u boong, \u1ed1ng l\u1ecdc n\u01b0\u1edbc bi\u1ec3n, thang tay v\u1ecbn.<br \/>\n&#8211; Super duplex 2507 (UNS S32750\/S32760): PREN ~ 41\u201345. D\u00e0nh cho n\u01b0\u1edbc bi\u1ec3n \u1ea5m (>25\u201330 \u00b0C), l\u01b0u l\u01b0\u1ee3ng cao, k\u1ebd h\u1edf nhi\u1ec1u, \u00e1p su\u1ea5t cao, subsea.<br \/>\n&#8211; Super austenitic 254SMO (UNS S31254): PREN ~ 42\u201344. L\u1ef1a ch\u1ecdn khi c\u1ea7n d\u1ec5 h\u00e0n ki\u1ec3u austenitic nh\u01b0ng ph\u1ea3i \u0111\u1ea1t ch\u1ed1ng r\u1ed7 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng super duplex.<br \/>\n&#8211; Th\u00e9p Nitronic 50 (XM-19): kh\u00e1ng r\u1ed7 t\u1ed1t h\u01a1n 316L, d\u00f9ng cho tr\u1ee5c, bu-l\u00f4ng \u0111\u1eb7c th\u00f9; c\u1ea7n \u0111\u00e1nh gi\u00e1 SCC.<\/p>\n<p>G\u1ee3i \u00fd theo v\u00f9ng l\u00e0m vi\u1ec7c:<br \/>\n&#8211; Kh\u00ed quy\u1ec3n ven bi\u1ec3n, k\u1ebft c\u1ea5u h\u1edf, b\u1ec1 m\u1eb7t m\u1ecbn: 316L t\u1ed1i thi\u1ec3u; t\u1ed1t h\u01a1n: 2205 \u0111\u1ec3 gi\u1ea3m b\u1ea3o tr\u00ec.<br \/>\n&#8211; Splash zone\/tri\u1ec1u, spray, m\u1ed1i gh\u00e9p nhi\u1ec1u k\u1ebd h\u1edf: 2205 l\u00e0 chu\u1ea9n; 2507\/254SMO cho n\u01b0\u1edbc \u1ea5m ho\u1eb7c r\u1ee7i ro k\u1ebd h\u1edf cao.<br \/>\n&#8211; H\u1ec7 \u1ed1ng\/thi\u1ebft b\u1ecb n\u01b0\u1edbc bi\u1ec3n tu\u1ea7n ho\u00e0n, l\u1ecdc n\u01b0\u1edbc l\u00e0m m\u00e1t: 2205; 2507\/254SMO cho t\u1ed1c \u0111\u1ed9 cao, T cao.<br \/>\n&#8211; D\u1ecbch v\u1ee5 \u201csour\u201d (H2S): tu\u00e2n th\u1ee7 NACE MR0175\/ISO 15156; duplex\/super duplex \u0111\u01b0\u1ee3c ph\u00e9p trong \u0111i\u1ec1u ki\u1ec7n gi\u1edbi h\u1ea1n \u0111\u1ed9 b\u1ec1n\/yield, nhi\u1ec7t \u0111\u1ed9 v\u00e0 Cl\u2013 nh\u1ea5t \u0111\u1ecbnh.<\/p>\n<h3>CPT, th\u1eed nghi\u1ec7m v\u00e0 x\u00e1c nh\u1eadn v\u1eadt li\u1ec7u<\/h3>\n<p>&#8211; Nhi\u1ec7t \u0111\u1ed9 t\u1edbi h\u1ea1n g\u00e2y r\u1ed7 (CPT) trong 3,5% NaCl \u0111i\u1ec3n h\u00ecnh: 316L ~ 10\u201320 \u00b0C; 2205 ~ 35\u201350 \u00b0C; 2507\/254SMO ~ 50\u201370+ \u00b0C (ph\u1ee5 thu\u1ed9c b\u1ec1 m\u1eb7t, k\u1ebd h\u1edf).<br \/>\n&#8211; Th\u1eed G48 (ASTM G48, Ph\u01b0\u01a1ng ph\u00e1p A\/B) v\u00e0 G150 \u0111\u1ec3 so s\u00e1nh pitting\/crevice; y\u00eau c\u1ea7u, nhi\u1ec7t \u0111\u1ed9 th\u1eed v\u00e0 ti\u00eau ch\u00ed m\u1ea5t kh\u1ed1i l\u01b0\u1ee3ng theo NORSOK M-630\/M-650 ho\u1eb7c th\u00f4ng s\u1ed1 d\u1ef1 \u00e1n.<\/p>\n<h2 id=\"toc-2-tieu-chuan-quy-pham-nen-ap-dung\">Ti\u00eau chu\u1ea9n, quy ph\u1ea1m n\u00ean \u00e1p d\u1ee5ng<\/h2>\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; NACE MR0175\/ISO 15156: V\u1eadt li\u1ec7u trong m\u00f4i tr\u01b0\u1eddng H2S.<br \/>\n&#8211; NORSOK M-001 (l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u), M-630 (MDS cho \u1ed1ng\/ph\u1ee5 ki\u1ec7n), M-650 (ch\u1ee9ng nh\u1eadn n\u0103ng l\u1ef1c nh\u00e0 ch\u1ebf t\u1ea1o v\u1eadt li\u1ec7u \u0111\u1eb7c bi\u1ec7t).<br \/>\n&#8211; DNVGL-RP-B401: Thi\u1ebft k\u1ebf b\u1ea3o v\u1ec7 catot cho k\u1ebft c\u1ea5u ng\u1eadp n\u01b0\u1edbc.<br \/>\n&#8211; ASTM\/ASME: A240 (t\u1ea5m), A182 (m\u1eb7t b\u00edch F51\/F53\/F55), A276 (thanh), A269\/A312 (\u1ed1ng), A380\/A967 (l\u00e0m s\u1ea1ch\u2013th\u1ee5 \u0111\u1ed9ng h\u00f3a), G48\/G150 (\u0103n m\u00f2n), ASME B31.3 (\u0111\u01b0\u1eddng \u1ed1ng).<\/p>\n<h2 id=\"toc-3-chien-luoc-chong-an-mon-tich-hop-cho-ngoai-khoi\">Chi\u1ebfn l\u01b0\u1ee3c ch\u1ed1ng \u0103n m\u00f2n t\u00edch h\u1ee3p cho ngo\u00e0i kh\u01a1i<\/h2>\n<p>&#8211; L\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u \u0111\u00fang c\u1ea5p: l\u1ea5y 2205 l\u00e0m chu\u1ea9n cho n\u01b0\u1edbc bi\u1ec3n v\u00e0 splash zone; n\u00e2ng l\u00ean 2507\/254SMO cho n\u01b0\u1edbc \u1ea5m\/k\u1ebd h\u1edf kh\u1eafc nghi\u1ec7t.<br \/>\n&#8211; Ki\u1ec3m so\u00e1t thi\u1ebft k\u1ebf k\u1ebd h\u1edf: tr\u00e1nh ch\u1ed3ng t\u1ea5m, t\u1ea1o tho\u00e1t n\u01b0\u1edbc, b\u1ecbt k\u00edn gio\u0103ng \u0111\u00fang chu\u1ea9n, s\u1eed d\u1ee5ng \u0111\u1ec7m kh\u00f4ng h\u00fat \u1ea9m, gi\u1ea3m \u0111i\u1ec3m giam mu\u1ed1i.<br \/>\n&#8211; Qu\u1ea3n l\u00fd galvanic:<br \/>\n  + C\u00e1ch \u0111i\u1ec7n inox v\u1edbi kim lo\u1ea1i kh\u00e1c b\u1eb1ng gio\u0103ng\/\u1ed1ng l\u00f3t phi kim, s\u01a1n c\u00e1ch \u0111i\u1ec7n ch\u00e2n \u0111\u1ee1.<br \/>\n  + Tr\u00e1nh t\u1ec9 l\u1ec7 di\u1ec7n t\u00edch b\u1ea5t l\u1ee3i (di\u1ec7n t\u00edch inox nh\u1ecf n\u1ed1i v\u1edbi di\u1ec7n t\u00edch l\u1edbn kim lo\u1ea1i k\u00e9m h\u01a1n trong n\u01b0\u1edbc bi\u1ec3n).<br \/>\n&#8211; K\u1ebft h\u1ee3p l\u1edbp ph\u1ee7\/TSA khi c\u1ea7n: k\u1ebft c\u1ea5u th\u00e9p carbon c\u00f3 th\u1ec3 TSA + CP; v\u1edbi inox, ch\u1ec9 s\u01a1n b\u1ea3o v\u1ec7 c\u1ee5c b\u1ed9 \u0111\u1ec3 gi\u1ea3m b\u00e1m b\u1ea9n\/galvanic, kh\u00f4ng d\u00f9ng CP tr\u1ef1c ti\u1ebfp cho chi ti\u1ebft inox h\u1edf tr\u1eeb khi c\u00f3 \u0111\u00e1nh gi\u00e1 h\u1ec7 th\u1ed1ng.<br \/>\n&#8211; B\u1ea3o v\u1ec7 catot cho b\u1ed9 ph\u1eadn ng\u1eadp n\u01b0\u1edbc: thi\u1ebft k\u1ebf theo DNVGL-RP-B401, l\u01b0u \u00fd t\u00ednh t\u01b0\u01a1ng th\u00edch v\u1edbi duplex\/super duplex v\u00e0 l\u1eafp \u0111\u1eb7t c\u00e1ch \u0111i\u1ec7n ph\u00f9 h\u1ee3p.<\/p>\n<h2 id=\"toc-4-han-gia-cong-va-xu-ly-be-mat-inox-cho-moi-truong-b\">H\u00e0n, gia c\u00f4ng v\u00e0 x\u1eed l\u00fd b\u1ec1 m\u1eb7t inox cho m\u00f4i tr\u01b0\u1eddng bi\u1ec3n<\/h2>\n<p>&#8211; H\u00e0n austenitic (316L\/904L\/254SMO): d\u00f9ng m\u00e1c \u201cL\u201d gi\u1ea3m nh\u1ea1y c\u1ea3m; ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u01b0a v\u00e0o, tr\u00e1nh \u0111\u01b0\u1eddng bi\u00ean gi\u00e0u Cr b\u1ecb suy gi\u1ea3m th\u1ee5 \u0111\u1ed9ng; ch\u1ecdn filler t\u01b0\u01a1ng \u1ee9ng (ER316L, ER385 cho 904L, ER2594\/ERNiCrMo cho super austenitic t\u00f9y \u1ee9ng d\u1ee5ng).<br \/>\n&#8211; H\u00e0n duplex 2205\/2507:<br \/>\n  + Ki\u1ec3m so\u00e1t nhi\u1ec7t nh\u1eadp v\u00e0 nhi\u1ec7t gi\u1eefa l\u1edbp: th\u01b0\u1eddng \u22641,5\u20132,5 kJ\/mm; interpass \u2264150 \u00b0C cho 2205, \u2264100\u2013150 \u00b0C cho 2507 (theo khuy\u1ebfn ngh\u1ecb nh\u00e0 s\u1ea3n xu\u1ea5t).<br \/>\n  + D\u00f9ng que\/d\u00e2y h\u00e0n ph\u00f9 h\u1ee3p (ER2209 cho 2205; ER2594 cho 2507), kh\u00ed b\u1ea3o v\u1ec7 c\u00f3 b\u1ed5 sung N2 cho l\u1edbp l\u00f3t \u0111\u1ec3 c\u00e2n b\u1eb1ng pha.<br \/>\n  + Ki\u1ec3m so\u00e1t t\u1ef7 l\u1ec7 pha ferrite\/austenite v\u00e0 tr\u00e1nh pha sigma; ki\u1ec3m tra FN\/ferrite scope khi y\u00eau c\u1ea7u d\u1ef1 \u00e1n.<br \/>\n&#8211; L\u00e0m s\u1ea1ch\u2013th\u1ee5 \u0111\u1ed9ng h\u00f3a sau h\u00e0n: t\u1ea9y axit ch\u1ecdn l\u1ecdc v\u00e0 th\u1ee5 \u0111\u1ed9ng theo ASTM A380\/A967; l\u00e0m s\u1ea1ch b\u1ec1 m\u1eb7t, tr\u00e1nh nhi\u1ec5m s\u1eaft t\u1ef1 do; r\u1eeda n\u01b0\u1edbc ng\u1ecdt k\u1ef9.<br \/>\n&#8211; Ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t: ch\u1ecdn \u0111\u1ed9 nh\u1eb5n cao (Ra th\u1ea5p), \u0111\u00e1nh b\u00f3ng\/electropolish cho chi ti\u1ebft ch\u1ecbu phun n\u01b0\u1edbc bi\u1ec3n \u0111\u1ec3 t\u0103ng kh\u1ea3 n\u0103ng th\u1ee5 \u0111\u1ed9ng v\u00e0 gi\u1ea3m b\u00e1m b\u1ea9n.<br \/>\n&#8211; L\u1eafp bul\u00f4ng\/\u0111ai \u1ed1c: h\u1ea1n ch\u1ebf \u201cgalling\u201d b\u1eb1ng m\u1ee1 b\u00f4i tr\u01a1n, d\u00f9ng duplex\/super duplex AISI t\u01b0\u01a1ng \u1ee9ng, ho\u1eb7c ph\u1ee7 ch\u1ed1ng k\u1eb9t; tr\u00e1nh 316L cho fastener \u1edf splash zone.<\/p>\n<h2 id=\"toc-5-ung-dung-khuyen-nghi-theo-hang-muc\">\u1ee8ng d\u1ee5ng khuy\u1ebfn ngh\u1ecb theo h\u1ea1ng m\u1ee5c<\/h2>\n<p>&#8211; \u0110\u01b0\u1eddng \u1ed1ng v\u00e0 manifold n\u01b0\u1edbc bi\u1ec3n: 2205; n\u00e2ng l\u00ean 2507\/254SMO khi T > 30 \u00b0C ho\u1eb7c r\u1ee7i ro k\u1ebd h\u1edf cao.<br \/>\n&#8211; Thang, lan can, s\u00e0n c\u00f4ng t\u00e1c splash zone: 2205; d\u1ee5ng c\u1ee5 neo, padeye: 2205\/2507.<br \/>\n&#8211; B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t n\u01b0\u1edbc bi\u1ec3n: 254SMO\/2507 cho \u1ed1ng ch\u00f9m; c\u00e2n nh\u1eafc titan n\u1ebfu clorination m\u1ea1nh v\u00e0 nhi\u1ec7t cao.<br \/>\n&#8211; Bu-l\u00f4ng\/m\u1eb7t b\u00edch ngo\u00e0i tr\u1eddi: 2205\/2507 v\u1edbi gio\u0103ng c\u00e1ch \u0111i\u1ec7n; tr\u00e1nh 316L \u1edf splash zone.<br \/>\n&#8211; H\u1ed9p c\u00e1p, m\u00e1ng c\u00e1p ven bi\u1ec3n: 316L t\u1ed1i thi\u1ec3u cho kh\u00ed quy\u1ec3n s\u1ea1ch; 2205 t\u1ea1i splash zone.<\/p>\n<h2 id=\"toc-6-so-sanh-chi-phi-vong-doi-lcc-dien-hinh\">So s\u00e1nh chi ph\u00ed v\u00f2ng \u0111\u1eddi (LCC) \u0111i\u1ec3n h\u00ecnh<\/h2>\n<p>&#8211; C\u01b0\u1eddng \u0111\u1ed9 ch\u1ea3y: 316L ~ 205 MPa; 2205 ~ 450\u2013550 MPa; 2507 ~ 550\u2013650 MPa. V\u1edbi c\u00f9ng t\u1ea3i, inox duplex\/super duplex cho ph\u00e9p gi\u1ea3m chi\u1ec1u d\u00e0y\/kh\u1ed1i l\u01b0\u1ee3ng, h\u1ea1 chi ph\u00ed l\u1eafp \u0111\u1eb7t.<br \/>\n&#8211; B\u1ea3o tr\u00ec: 316L trong splash zone th\u01b0\u1eddng ph\u00e1t sinh r\u1ed7\/k\u1ebd h\u1edf sau 1\u20133 n\u0103m n\u1ebfu thi\u1ebft k\u1ebf b\u1ec1 m\u1eb7t k\u00e9m; 2205\/2507 duy tr\u00ec th\u1ee5 \u0111\u1ed9ng t\u1ed1t h\u01a1n, gi\u1ea3m chu k\u1ef3 thay th\u1ebf v\u00e0 d\u1eebng m\u00e1y.<br \/>\n&#8211; K\u1ebft lu\u1eadn LCC: trong 15\u201325 n\u0103m v\u1eadn h\u00e0nh ngo\u00e0i kh\u01a1i, 2205 th\u01b0\u1eddng r\u1ebb h\u01a1n 316L khi t\u00ednh t\u1ed5ng chi ph\u00ed (v\u1eadt li\u1ec7u + thi c\u00f4ng + b\u1ea3o tr\u00ec + d\u1eebng m\u00e1y), 2507\/254SMO kinh t\u1ebf cho \u0111i\u1ec1u ki\u1ec7n bi\u1ec3n \u1ea5m\/kh\u1eafc nghi\u1ec7t.<\/p>\n<h2 id=\"toc-7-kiem-tra-va-bao-tri-trong-van-hanh\">Ki\u1ec3m tra v\u00e0 b\u1ea3o tr\u00ec trong v\u1eadn h\u00e0nh<\/h2>\n<p>&#8211; V\u1ec7 sinh \u0111\u1ecbnh k\u1ef3: r\u1eeda n\u01b0\u1edbc ng\u1ecdt b\u1ec1 m\u1eb7t h\u1edf, \u0111\u1eb7c bi\u1ec7t sau b\u00e3o\/phun n\u01b0\u1edbc bi\u1ec3n m\u1ea1nh; lo\u1ea1i b\u1ecf c\u1eb7n mu\u1ed1i v\u00e0 sinh v\u1eadt b\u00e1m.<br \/>\n&#8211; Gi\u00e1m s\u00e1t \u0103n m\u00f2n: ki\u1ec3m tra tr\u1ef1c quan k\u1ebd h\u1edf, ch\u00e2n m\u1ed1i h\u00e0n; \u0111o \u0111\u1ed9 s\u00e2u r\u1ed7; UT chi\u1ec1u d\u00e0y v\u1edbi \u1ed1ng\/b\u00ecnh; PT\/MT cho m\u1ed1i h\u00e0n; FN ki\u1ec3m so\u00e1t pha v\u1edbi duplex khi c\u1ea7n.<br \/>\n&#8211; Qu\u1ea3n l\u00fd CP\/anode: ki\u1ec3m tra ti\u1ec1m n\u0103ng \u0111i\u1ec7n c\u1ef1c, t\u00ecnh tr\u1ea1ng anode; \u0111\u1ea3m b\u1ea3o c\u00e1ch \u0111i\u1ec7n gi\u1eefa inox v\u00e0 th\u00e9p carbon c\u00f2n hi\u1ec7u l\u1ef1c.<br \/>\n&#8211; S\u1eeda ch\u1eefa: c\u1eaft b\u1ecf v\u00f9ng r\u1ed7 s\u00e2u\/k\u1ebd h\u1edf, h\u00e0n b\u1ed5 sung \u0111\u00fang quy tr\u00ecnh PQR\/WPS; x\u1eed l\u00fd b\u1ec1 m\u1eb7t sau s\u1eeda.<\/p>\n<h2 id=\"toc-8-dai-san-pham-inox-phu-hop-cho-ngoai-khoi\">D\u1ea3i s\u1ea3n ph\u1ea9m inox ph\u00f9 h\u1ee3p cho ngo\u00e0i kh\u01a1i<\/h2>\n<p>&#8211; T\u1ea5m\/cu\u1ed9n: 316L, 904L, 2205, 2507, 254SMO theo ASTM A240, ch\u1ee9ng ch\u1ec9 EN 10204 3.1.<br \/>\n&#8211; \u1ed0ng h\u00e0n\/\u0111\u00fac: 316L\/904L\/2205\/2507 theo ASTM A312 (seamless) v\u00e0 A269 (instrument); ki\u1ec3m tra PMI, G48\/G150 theo y\u00eau c\u1ea7u.<br \/>\n&#8211; Ph\u1ee5 ki\u1ec7n\/m\u1eb7t b\u00edch: ASTM A182 F51 (2205), F53\/F55 (super duplex); c\u00fat, t\u00ea, m\u0103ng s\u00f4ng theo ASME B16.9\/B16.5.<br \/>\n&#8211; Bu-l\u00f4ng\/\u0111ai \u1ed1c: duplex\/super duplex theo ASTM A193\/A194 t\u01b0\u01a1ng \u1ee9ng; x\u1eed l\u00fd b\u1ec1 m\u1eb7t ch\u1ed1ng k\u1eb9t.<\/p>\n<h2 id=\"toc-9-cau-hoi-thuong-gap\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<p>&#8211; 316L c\u00f3 d\u00f9ng \u0111\u01b0\u1ee3c cho n\u01b0\u1edbc bi\u1ec3n kh\u00f4ng? Ch\u1ec9 n\u00ean d\u00f9ng \u1edf kh\u00ed quy\u1ec3n ven bi\u1ec3n s\u1ea1ch, \u00edt k\u1ebd h\u1edf; kh\u00f4ng khuy\u1ebfn ngh\u1ecb splash zone\/h\u1ec7 n\u01b0\u1edbc bi\u1ec3n.<br \/>\n&#8211; Ch\u1ecdn 2205 hay 2507? 2205 \u0111\u1ee7 cho \u0111a s\u1ed1 \u1ee9ng d\u1ee5ng n\u01b0\u1edbc bi\u1ec3n m\u00e1t; ch\u1ecdn 2507 khi n\u01b0\u1edbc \u1ea5m, r\u1ee7i ro k\u1ebd h\u1edf cao, ho\u1eb7c c\u1ea7n bi\u00ean \u0111\u1ed9 an to\u00e0n l\u1edbn.<br \/>\n&#8211; C\u00f3 c\u1ea7n s\u01a1n inox? S\u01a1n kh\u00f4ng nh\u1eb1m ch\u1ed1ng r\u1ec9 nh\u01b0 th\u00e9p carbon, nh\u01b0ng h\u1eefu \u00edch \u0111\u1ec3 h\u1ea1n ch\u1ebf b\u00e1m b\u1ea9n\/galvanic c\u1ee5c b\u1ed9; lu\u00f4n \u01b0u ti\u00ean b\u1ec1 m\u1eb7t m\u1ecbn v\u00e0 th\u1ee5 \u0111\u1ed9ng h\u00f3a t\u1ed1t.<br \/>\n&#8211; Inox c\u00f3 c\u1ea7n CP? C\u00e1c chi ti\u1ebft inox h\u1edf m\u1eb7t kh\u00f4ng c\u1ea7n CP; b\u1ed9 ph\u1eadn ng\u1eadp n\u01b0\u1edbc c\u00f3 th\u1ec3 ch\u1ecbu \u1ea3nh h\u01b0\u1edfng CP c\u1ee7a k\u1ebft c\u1ea5u chung, c\u1ea7n thi\u1ebft k\u1ebf c\u00e1ch \u0111i\u1ec7n theo DNV \u0111\u1ec3 tr\u00e1nh t\u01b0\u01a1ng t\u00e1c b\u1ea5t l\u1ee3i.<\/p>\n<h2 id=\"toc-10-tai-lieu-tham-khao\">T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n<p>&#8211; Nickel Institute \u2013 Guidelines for the Use of Stainless Steel in Seawater; technical publications on stainless in marine service.<br \/>\n&#8211; IMOA (International Molybdenum Association) \u2013 Practical Guidelines for the Selection of Stainless Steels in Seawater.<br \/>\n&#8211; ISO 21457: Materials selection and corrosion control for oil and gas production systems.<br \/>\n&#8211; NACE MR0175\/ISO 15156: Petroleum and natural gas industries \u2014 Materials for use in H2S-containing environments.<br \/>\n&#8211; NORSOK M-001, M-630, M-650; DNVGL-RP-B401.<br \/>\n&#8211; ASTM A240, A182, A312, A269, A380, A967, G48, G150; ASME B31.3.<\/p>\n<h2 id=\"toc-11-ket-luan\">K\u1ebft lu\u1eadn<\/h2>\n<p>Ch\u1ed1ng \u0103n m\u00f2n ngo\u00e0i kh\u01a1i hi\u1ec7u qu\u1ea3 ph\u1ea3i b\u1eaft \u0111\u1ea7u t\u1eeb ch\u1ecdn \u0111\u00fang m\u00e1c inox theo PREN v\u00e0 \u0111i\u1ec1u ki\u1ec7n v\u00f9ng (316L ch\u1ec9 gi\u1edbi h\u1ea1n; 2205 l\u00e0 chu\u1ea9n chung; 2507\/254SMO cho n\u01b0\u1edbc \u1ea5m\/kh\u1eafc nghi\u1ec7t), k\u1ebft h\u1ee3p thi\u1ebft k\u1ebf gi\u1ea3m k\u1ebd h\u1edf, qu\u1ea3n l\u00fd galvanic, thi c\u00f4ng h\u00e0n\u2013x\u1eed l\u00fd b\u1ec1 m\u1eb7t chu\u1ea9n h\u00f3a, v\u00e0 b\u1ea3o tr\u00ec ch\u1ee7 \u0111\u1ed9ng. C\u00e1ch ti\u1ebfp c\u1eadn t\u00edch h\u1ee3p n\u00e0y t\u1ed1i \u01b0u chi ph\u00ed v\u00f2ng \u0111\u1eddi, gi\u1ea3m r\u1ee7i ro d\u1eebng m\u00e1y v\u00e0 b\u1ea3o \u0111\u1ea3m an to\u00e0n c\u00f4ng tr\u00ecnh.<\/p>\n<p>C\u1ea7n t\u01b0 v\u1ea5n ch\u1ecdn m\u00e1c inox, ti\u00eau chu\u1ea9n v\u00e0 h\u00e0ng s\u1eb5n kho cho d\u1ef1 \u00e1n ngo\u00e0i kh\u01a1i? Li\u00ean h\u1ec7 Inox Cuong Thinh \u0111\u1ec3 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt 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 inox 316L, 2205, 2507, 904L ch\u1ed1ng \u0103n m\u00f2n bi\u1ec3n: PREN, ti\u00eau chu\u1ea9n, h\u00e0n, thi\u1ebft k\u1ebf, b\u1ea3o tr\u00ec cho gi\u00e0n khoan v\u00e0 c\u00f4ng tr\u00ecnh ngo\u00e0i kh\u01a1i, t\u1ed1i \u01b0u chi ph\u00ed v\u00f2ng \u0111\u1eddi.<\/p>\n","protected":false},"author":7,"featured_media":1028,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-2228","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\/2228","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=2228"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/2228\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1028"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=2228"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=2228"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=2228"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}