{"id":1784,"date":"2026-03-15T12:34:36","date_gmt":"2026-03-15T05:34:36","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/chong-an-mon-ngoai-khoi-chon-inox-dung-chuan-cho-gian-khoan\/"},"modified":"2026-03-15T12:34:36","modified_gmt":"2026-03-15T05:34:36","slug":"chong-an-mon-ngoai-khoi-chon-inox-dung-chuan-cho-gian-khoan","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/chong-an-mon-ngoai-khoi-chon-inox-dung-chuan-cho-gian-khoan\/","title":{"rendered":"Ch\u1ed1ng \u0103n m\u00f2n ngo\u00e0i kh\u01a1i: ch\u1ecdn Inox \u0111\u00fang chu\u1ea9n cho gi\u00e0n khoan"},"content":{"rendered":"<div class=\"custom-toc\">\n<h3>N\u1ed9i dung ch\u00ednh<\/h3>\n<ul>\n<li><a href=\"#toc-0-nhung-co-che-an-mon-ngoai-khoi-can-kiem-soat\">Nh\u1eefng c\u01a1 ch\u1ebf \u0103n m\u00f2n ngo\u00e0i kh\u01a1i c\u1ea7n ki\u1ec3m so\u00e1t<\/a><\/li>\n<li><a href=\"#toc-1-nguyen-tac-chon-inox-dung-pren-va-tieu-chuan\">Nguy\u00ean t\u1eafc ch\u1ecdn Inox: d\u00f9ng PREN v\u00e0 ti\u00eau chu\u1ea9n<\/a><\/li>\n<li><a href=\"#toc-2-khuyen-nghi-vat-lieu-theo-hang-muc-ngoai-khoi\">Khuy\u1ebfn ngh\u1ecb v\u1eadt li\u1ec7u theo h\u1ea1ng m\u1ee5c ngo\u00e0i kh\u01a1i<\/a><\/li>\n<li><a href=\"#toc-3-thiet-ke-chong-ke-ho-va-an-mon-dien-hoa\">Thi\u1ebft k\u1ebf ch\u1ed1ng k\u1ebd h\u1edf v\u00e0 \u0103n m\u00f2n \u0111i\u1ec7n h\u00f3a<\/a><\/li>\n<li><a href=\"#toc-4-quy-trinh-han-xu-ly-be-mat-va-qaqc\">Quy tr\u00ecnh h\u00e0n, x\u1eed l\u00fd b\u1ec1 m\u1eb7t v\u00e0 QA\/QC<\/a><\/li>\n<li><a href=\"#toc-5-bao-ve-bo-sung-son-phu-va-bao-ve-catot\">B\u1ea3o v\u1ec7 b\u1ed5 sung: s\u01a1n ph\u1ee7 v\u00e0 b\u1ea3o v\u1ec7 catot<\/a><\/li>\n<li><a href=\"#toc-6-van-hanh-va-bao-tri-nhung-diem-tao-khac-biet\">V\u1eadn h\u00e0nh v\u00e0 b\u1ea3o tr\u00ec: nh\u1eefng \u0111i\u1ec3m t\u1ea1o kh\u00e1c bi\u1ec7t<\/a><\/li>\n<li><a href=\"#toc-7-quy-trinh-6-buoc-chon-inox-cho-ngoai-khoi\">Quy tr\u00ecnh 6 b\u01b0\u1edbc ch\u1ecdn Inox cho ngo\u00e0i kh\u01a1i<\/a><\/li>\n<li><a href=\"#toc-8-so-sanh-chi-phi-loi-ich-theo-vong-doi\">So s\u00e1nh chi ph\u00ed \u2013 l\u1ee3i \u00edch theo v\u00f2ng \u0111\u1eddi<\/a><\/li>\n<li><a href=\"#toc-9-khuyen-nghi-nhanh-theo-dieu-kien-bien-dong-viet-na\">Khuy\u1ebfn ngh\u1ecb nhanh theo \u0111i\u1ec1u ki\u1ec7n Bi\u1ec3n \u0110\u00f4ng (Vi\u1ec7t Nam)<\/a><\/li>\n<li><a href=\"#toc-10-san-pham-va-tieu-chuan-inox-cuong-thinh-cung-cap\">S\u1ea3n ph\u1ea9m v\u00e0 ti\u00eau chu\u1ea9n Inox Cuong Thinh cung c\u1ea5p<\/a><\/li>\n<li><a href=\"#toc-11-nguon-tham-khao-chinh\">Ngu\u1ed3n tham kh\u1ea3o ch\u00ednh<\/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 l\u0129nh v\u1ef1c n\u0103ng l\u01b0\u1ee3ng v\u00e0 \u0111\u00f3ng t\u00e0u, gi\u00e0n khoan v\u00e0 c\u00e1c c\u00f4ng tr\u00ecnh ngo\u00e0i kh\u01a1i l\u00e0 m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n kh\u1eafc nghi\u1ec7t nh\u1ea5t. B\u00e0i vi\u1ebft n\u00e0y t\u1eadp trung v\u00e0o gi\u1ea3i ph\u00e1p ch\u1ed1ng \u0103n m\u00f2n b\u1eb1ng Inox (th\u00e9p kh\u00f4ng g\u1ec9) cho ngo\u00e0i kh\u01a1i \u2014 t\u1eeb c\u01a1 ch\u1ebf \u0103n m\u00f2n, c\u00e1ch ch\u1ecdn m\u00e1c th\u00e9p theo ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf, \u0111\u1ebfn thi\u1ebft k\u1ebf, h\u00e0n, b\u1ea3o tr\u00ec v\u00e0 t\u1ed1i \u01b0u chi ph\u00ed v\u00f2ng \u0111\u1eddi.<\/p>\n<h2 id=\"toc-0-nhung-co-che-an-mon-ngoai-khoi-can-kiem-soat\">Nh\u1eefng c\u01a1 ch\u1ebf \u0103n m\u00f2n ngo\u00e0i kh\u01a1i c\u1ea7n ki\u1ec3m so\u00e1t<\/h2>\n<p>&#8211; \u0102n m\u00f2n r\u1ed7 (pitting) do ion Cl-: t\u0103ng m\u1ea1nh \u1edf v\u00f9ng \u201csplash\u201d (s\u00f3ng b\u1eafn) v\u00e0 n\u01b0\u1edbc bi\u1ec3n \u1ea5m.<br \/>\n&#8211; \u0102n m\u00f2n k\u1ebd h\u1edf (crevice) d\u01b0\u1edbi \u0111\u1ec7m k\u00edn, v\u00f2ng \u0111\u1ec7m, k\u1eb9p, v\u1ecf b\u1ecdc c\u00e1p.<br \/>\n&#8211; N\u1ee9t do \u1ee9ng su\u1ea5t trong m\u00f4i tr\u01b0\u1eddng Cl- (SCC), \u0111\u1eb7c bi\u1ec7t v\u1edbi austenitic nh\u01b0 304\/316 khi T > 60\u00b0C.<br \/>\n&#8211; \u0102n m\u00f2n \u0111i\u1ec7n h\u00f3a (galvanic) khi gh\u00e9p v\u1edbi th\u00e9p carbon\/\u0111\u1ed3ng n\u1ebfu kh\u00f4ng c\u00e1ch \u0111i\u1ec7n.<br \/>\n&#8211; \u0102n m\u00f2n do vi sinh (MIC) \u1edf v\u00f9ng n\u01b0\u1edbc t\u00f9, \u00edt l\u01b0u t\u1ed1c.<br \/>\n&#8211; M\u1ecfi \u2013 \u0103n m\u00f2n (corrosion fatigue) tr\u00ean k\u1ebft c\u1ea5u ch\u1ecbu s\u00f3ng\/gi\u00f3.<\/p>\n<p>L\u01b0u \u00fd theo v\u00f9ng:<br \/>\n&#8211; Kh\u00ed quy\u1ec3n bi\u1ec3n: mu\u1ed1i \u0111\u1ecdng + UV \u2192 b\u1ea9n mu\u1ed1i, r\u1ed7 ch\u1eadm nh\u01b0ng ch\u1eafc ch\u1eafn.<br \/>\n&#8211; V\u00f9ng splash\/tidal: oxy d\u1ed3i d\u00e0o + Cl- cao \u2192 r\u1ed7\/crevice kh\u1ed1c li\u1ec7t nh\u1ea5t.<br \/>\n&#8211; V\u00f9ng ng\u1eadp n\u01b0\u1edbc: \u1ed5n \u0111\u1ecbnh h\u01a1n; d\u01b0\u1edbi CP c\u00f3 th\u1ec3 an to\u00e0n n\u1ebfu thi\u1ebft k\u1ebf \u0111\u00fang \u0111i\u1ec7n th\u1ebf.<\/p>\n<h2 id=\"toc-1-nguyen-tac-chon-inox-dung-pren-va-tieu-chuan\">Nguy\u00ean t\u1eafc ch\u1ecdn Inox: d\u00f9ng PREN v\u00e0 ti\u00eau chu\u1ea9n<\/h2>\n<h3>Ch\u1ec9 s\u1ed1 PREN \u0111\u1ec3 d\u1ef1 b\u00e1o ch\u1ed1ng r\u1ed7<\/h3>\n<p>&#8211; C\u00f4ng th\u1ee9c g\u1ea7n \u0111\u00fang: PREN = %Cr + 3.3\u00d7%Mo + 16\u00d7%N.<br \/>\n&#8211; Ng\u01b0\u1ee1ng tham kh\u1ea3o:<br \/>\n  &#8211; PREN < 24: kh\u00f4ng ph\u00f9 h\u1ee3p n\u01b0\u1edbc bi\u1ec3n.\n  - 25\u201334: d\u00f9ng \u0111\u01b0\u1ee3c kh\u00ed quy\u1ec3n bi\u1ec3n, tr\u00e1nh splash.\n  - \u226535: ph\u00f9 h\u1ee3p ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp n\u01b0\u1edbc bi\u1ec3n; splash khuy\u1ebfn ngh\u1ecb \u226540.\n\nPREN \u0111i\u1ec3n h\u00ecnh:\n- 304\/304L: ~18\u201319 \u2192 lo\u1ea1i tr\u1eeb cho bi\u1ec3n.\n- 316L (1.4404): ~24\u201326 \u2192 ch\u1ec9 n\u00ean d\u00f9ng kh\u00ed quy\u1ec3n bi\u1ec3n, tr\u00e1nh splash\/n\u01b0\u1edbc bi\u1ec3n \u1ea5m.\n- Duplex 2205 (UNS S32205\/S31803): ~34\u201337 \u2192 n\u01b0\u1edbc bi\u1ec3n\/\u0111\u01b0\u1eddng \u1ed1ng c\u1ee9u h\u1ecfa\/thi\u1ebft b\u1ecb ph\u1ee5.\n- Super duplex 2507 (UNS S32750\/S32760): ~41\u201345 \u2192 splash, n\u01b0\u1edbc bi\u1ec3n \u1ea5m, m\u1ea3ng nhi\u1ec7t cao.\n- 6Mo\/254SMO (UNS S31254\/1.4547): ~43\u201346 \u2192 thay th\u1ebf h\u1ee3p kim Ni cao \u1edf v\u00f9ng kh\u1eafc nghi\u1ec7t.\n- 904L (1.4539): ~34\u201336 \u2192 t\u1ed1t h\u01a1n 316L nh\u01b0ng k\u00e9m duplex trong n\u01b0\u1edbc bi\u1ec3n.\n\n\n\n<h3>Ti\u00eau chu\u1ea9n c\u1ea7n b\u00e1m theo<\/h3>\n<p>&#8211; ISO 21457: L\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u v\u00e0 ki\u1ec3m so\u00e1t \u0103n m\u00f2n cho khai th\u00e1c d\u1ea7u kh\u00ed ngo\u00e0i kh\u01a1i.<br \/>\n&#8211; NORSOK M-001: L\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u cho c\u00f4ng tr\u00ecnh ngo\u00e0i kh\u01a1i; M-650: Ch\u1ee9ng nh\u1eadn nh\u00e0 cung c\u1ea5p v\u1eadt li\u1ec7u h\u1ee3p kim.<br \/>\n&#8211; NACE MR0175\/ISO 15156: V\u1eadt li\u1ec7u ch\u1ecbu m\u00f4i tr\u01b0\u1eddng H2S (sour service).<br \/>\n&#8211; DNV-RP-B401: Thi\u1ebft k\u1ebf b\u1ea3o v\u1ec7 catot cho k\u1ebft c\u1ea5u ng\u1ea7m\/ngo\u00e0i kh\u01a1i.<br \/>\n&#8211; ASTM G48: Th\u1eed r\u1ed7\/\u0103n m\u00f2n k\u1ebd h\u1edf cho th\u00e9p kh\u00f4ng g\u1ec9 cao h\u1ee3p kim.<\/p>\n<h2 id=\"toc-2-khuyen-nghi-vat-lieu-theo-hang-muc-ngoai-khoi\">Khuy\u1ebfn ngh\u1ecb v\u1eadt li\u1ec7u theo h\u1ea1ng m\u1ee5c ngo\u00e0i kh\u01a1i<\/h2>\n<h3>\u0110\u01b0\u1eddng \u1ed1ng, b\u01a1m, h\u1ec7 th\u1ed1ng n\u01b0\u1edbc bi\u1ec3n\/c\u1ee9u h\u1ecfa (seawater &#038; firewater)<\/h3>\n<p>&#8211; \u0110i\u1ec1u ki\u1ec7n th\u01b0\u1eddng (\u226425\u201330\u00b0C, v\u1eadn t\u1ed1c \u22651 m\/s): Duplex 2205 (\u1ed1ng ASTM A790\/A928; t\u1ea5m A240; m\u1eb7t b\u00edch A182 F51).<br \/>\n&#8211; \u0110i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t (splash li\u00ean t\u1ee5c, n\u01b0\u1edbc \u1ea5m >30\u00b0C, l\u1eafng mu\u1ed1i): Super duplex 2507 (A790\/A240; A182 F53\/F55) ho\u1eb7c 6Mo (UNS S31254).<br \/>\n&#8211; Khu v\u1ef1c \u00edt l\u01b0u t\u1ed1c\/n\u01b0\u1edbc t\u00f9: \u01afu ti\u00ean super duplex\/6Mo \u0111\u1ec3 gi\u1ea3m MIC.<br \/>\n&#8211; Firewater ring-main: 2205 l\u00e0 ti\u00eau chu\u1ea9n c\u00f4ng nghi\u1ec7p v\u00ec c\u00e2n b\u1eb1ng chi ph\u00ed\u2013\u0111\u1ed9 b\u1ec1n.<\/p>\n<h3>Thi\u1ebft b\u1ecb trao \u0111\u1ed5i nhi\u1ec7t, \u1ed1ng ch\u00f9m<\/h3>\n<p>&#8211; Nhi\u1ec7t \u0111\u1ed9 cao\/n\u01b0\u1edbc bi\u1ec3n: 6Mo\/254SMO ho\u1eb7c titanium (n\u1ebfu b\u00e0i to\u00e1n kinh t\u1ebf\u2013k\u1ef9 thu\u1eadt cho ph\u00e9p). 316L th\u01b0\u1eddng th\u1ea5t b\u1ea1i s\u1edbm do r\u1ed7\/crevice.<\/p>\n<h3>K\u1ebft c\u1ea5u ph\u1ee5 tr\u1ee3, lan can, thang c\u00e1p, t\u1ee7 \u0111i\u1ec7n<\/h3>\n<p>&#8211; Kh\u00ed quy\u1ec3n bi\u1ec3n (xa splash, c\u00f3 m\u00e1i che): 316L ph\u1ee7 b\u1ec1 m\u1eb7t t\u1ed1t, \u0111\u1ecbnh k\u1ef3 r\u1eeda n\u01b0\u1edbc ng\u1ecdt.<br \/>\n&#8211; G\u1ea7n ho\u1eb7c trong splash: Duplex 2205 l\u00e0 m\u1ee9c kh\u1edfi \u0111i\u1ec3m. 316L th\u01b0\u1eddng r\u1ed7 s\u1edbm.<br \/>\n&#8211; V\u1ecf t\u1ee7\/th\u00e2n thi\u1ebft b\u1ecb: 316L d\u00e0y + ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t m\u1ecbn (Ra \u22640,8 \u00b5m) v\u00e0 r\u1eeda \u0111\u1ecbnh k\u1ef3; n\u01a1i h\u1eaft s\u00f3ng \u2192 d\u00f9ng duplex.<\/p>\n<h3>Bu l\u00f4ng\u2013\u0111ai \u1ed1c, ph\u1ee5 ki\u1ec7n<\/h3>\n<p>&#8211; Splash\/n\u01b0\u1edbc bi\u1ec3n: Bu l\u00f4ng duplex\/super duplex theo ASTM A1082, ho\u1eb7c 6Mo cho kh\u00e1ng r\u1ed7 cao. Tr\u00e1nh 304\/316 \u1edf splash.<br \/>\n&#8211; Kh\u00ed quy\u1ec3n bi\u1ec3n: A4-80 (316) c\u00f3 th\u1ec3 d\u00f9ng nh\u01b0ng n\u00ean ph\u1ee7 ch\u1ed1ng r\u1ed7\/keo ch\u1ed1ng k\u1eb9t ren.<br \/>\n&#8211; Ph\u00f2ng ch\u1ed1ng \u201cgalling\u201d (k\u1eb9t ren): d\u00f9ng m\u1ee1 ch\u1ed1ng k\u1eb9t ch\u1ee9a MoS2\/PTFE, ph\u1ed1i h\u1ee3p v\u1eadt li\u1ec7u kh\u00e1c \u0111\u1ed9 c\u1ee9ng, v\u00f2ng \u0111\u1ec7m c\u1ee9ng kh\u00f4ng g\u1ec9\/Co-based, ho\u1eb7c d\u00f9ng Nitronic 60 cho \u0111ai \u1ed1c.<\/p>\n<h3>D\u00e2y neo, \u1ed1ng \u0111\u1ee9ng (risers), \u0111\u01b0\u1eddng \u1ed1ng c\u00f4ng ngh\u1ec7<\/h3>\n<p>&#8211; CRA cladding\/lined pipe b\u1eb1ng 316L\/duplex\/super duplex t\u00f9y m\u00f4i tr\u01b0\u1eddng; sour service theo NACE MR0175\/ISO 15156.<\/p>\n<h2 id=\"toc-3-thiet-ke-chong-ke-ho-va-an-mon-dien-hoa\">Thi\u1ebft k\u1ebf ch\u1ed1ng k\u1ebd h\u1edf v\u00e0 \u0103n m\u00f2n \u0111i\u1ec7n h\u00f3a<\/h2>\n<p>&#8211; Tr\u00e1nh khe h\u1edf: b\u00edch full-face gasket, h\u00e0n b\u1ecbt t\u00fai b\u1eaby n\u01b0\u1edbc, tho\u00e1t n\u01b0\u1edbc t\u1ed1t, tr\u00e1nh bu\u1ed9c d\u00e2y k\u1eb9p t\u1ea1o \u201ct\u00fai mu\u1ed1i\u201d.<br \/>\n&#8211; Gasket: ch\u1ecdn v\u1eadt li\u1ec7u ch\u1ecbu Cl-, h\u1ea1n ch\u1ebf k\u1ebd h\u1edf (PTFE m\u1edf r\u1ed9ng, ePTFE).<br \/>\n&#8211; C\u00e1ch \u0111i\u1ec7n m\u1ed1i gh\u00e9p kh\u00e1c kim lo\u1ea1i: b\u1ed9 kit c\u00e1ch \u0111i\u1ec7n b\u00edch\/bu l\u00f4ng (sleeve + washer) khi n\u1ed1i v\u1edbi th\u00e9p carbon\/\u0111\u1ed3ng.<br \/>\n&#8211; Ph\u1ed1i kim lo\u1ea1i: tr\u00e1nh gh\u00e9p Inox v\u1edbi kim lo\u1ea1i k\u00e9m h\u01a1n di\u1ec7n t\u00edch nh\u1ecf-kh\u00e1c bi\u00ean th\u1ebf (v\u00ed d\u1ee5 th\u00e9p carbon nh\u1ecf gh\u00e9p v\u00e0o di\u1ec7n t\u00edch l\u1edbn inox) n\u1ebfu kh\u00f4ng c\u00f3 CP\/isolator.<\/p>\n<h2 id=\"toc-4-quy-trinh-han-xu-ly-be-mat-va-qaqc\">Quy tr\u00ecnh h\u00e0n, x\u1eed l\u00fd b\u1ec1 m\u1eb7t v\u00e0 QA\/QC<\/h2>\n<h3>H\u00e0n austenitic (316L, 6Mo) v\u00e0 duplex\/super duplex<\/h3>\n<p>&#8211; Ki\u1ec3m so\u00e1t nhi\u1ec7t v\u00e0o: Duplex y\u00eau c\u1ea7u nhi\u1ec7t v\u00e0o th\u1ea5p\u2013v\u1eeba \u0111\u1ec3 gi\u1eef c\u00e2n b\u1eb1ng pha (ferrite ~35\u201355%). D\u00f9ng que\/ d\u00e2y \u0111\u1eafp ph\u00f9 h\u1ee3p (ER\/Electrode 2209 cho 2205; 2594 cho 2507).<br \/>\n&#8211; B\u1ea3o v\u1ec7 m\u1eb7t sau: Purge kh\u00ed tr\u01a1 (Ar\/N2+Ar) \u0111\u1ec3 tr\u00e1nh \u201csugaring\u201d (oxy h\u00f3a m\u1eb7t l\u01b0ng) \u2014 ngu\u1ed3n m\u1ed3i cho crevice.<br \/>\n&#8211; Tr\u00e1nh gi\u00f2n sigma\/chi ti\u1ebft nh\u1ea1y c\u1ea3m: gi\u1edbi h\u1ea1n th\u1eddi gian trong v\u00f9ng 600\u20131000\u00b0C, kh\u00f4ng \u1ee7 d\u00e0i.<br \/>\n&#8211; Ki\u1ec3m tra ferrite b\u1eb1ng m\u00e1y \u0111o di \u0111\u1ed9ng theo h\u01b0\u1edbng d\u1eabn ISO 8249 (tham kh\u1ea3o nh\u00e0 s\u1ea3n xu\u1ea5t kim lo\u1ea1i).<\/p>\n<h3>Ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t v\u00e0 th\u1ee5 \u0111\u1ed9ng h\u00f3a<\/h3>\n<p>&#8211; T\u1ea9y m\u1ed1i h\u00e0n, pickling &#038; passivation theo ASTM A380\/A967; lo\u1ea1i b\u1ecf s\u1eaft t\u1ef1 do v\u00e0 ph\u1ee5c h\u1ed3i m\u00e0ng th\u1ee5 \u0111\u1ed9ng Cr2O3.<br \/>\n&#8211; \u0110\u1ed9 nh\u1eb5n: b\u1ec1 m\u1eb7t m\u1ecbn (bead-blast m\u1ecbn, \u0111\u00e1nh b\u00f3ng) gi\u1ea3m b\u00e1m mu\u1ed1i\/t\u1ea3o \u2192 gi\u1ea3m crevice.<br \/>\n&#8211; Tr\u00e1nh nhi\u1ec5m b\u1ea9n Fe: t\u00e1ch bi\u1ec7t d\u1ee5ng c\u1ee5 gia c\u00f4ng v\u1edbi th\u00e9p carbon; ki\u1ec3m tra PMI (Positive Material Identification).<\/p>\n<h3>Th\u1eed nghi\u1ec7m v\u00e0 nghi\u1ec7m thu<\/h3>\n<p>&#8211; Th\u1eed r\u1ed7\/crevice theo ASTM G48 (ph\u01b0\u01a1ng ph\u00e1p A\/C) cho 6Mo\/super duplex khi y\u00eau c\u1ea7u.<br \/>\n&#8211; Th\u1eed \u00e1p, NDT: PT (th\u1ea5m m\u00e0u), UT, VT; ki\u1ec3m tra mu\u1ed1i \u0111\u1ecdng (dime test\/kit Cl-) sau l\u1eafp \u0111\u1eb7t.<\/p>\n<h2 id=\"toc-5-bao-ve-bo-sung-son-phu-va-bao-ve-catot\">B\u1ea3o v\u1ec7 b\u1ed5 sung: s\u01a1n ph\u1ee7 v\u00e0 b\u1ea3o v\u1ec7 catot<\/h2>\n<p>&#8211; S\u01a1n\/TSA (phun nh\u00f4m nhi\u1ec7t) th\u01b0\u1eddng \u00e1p d\u1ee5ng cho th\u00e9p carbon. V\u1edbi inox, ch\u1ec9 s\u01a1n khi c\u1ea7n ki\u1ec3m so\u00e1t b\u00e1m b\u1ea9n\/\u0103n m\u00f2n k\u1ebd h\u1edf \u1edf splash.<br \/>\n&#8211; B\u1ea3o v\u1ec7 catot (CP) theo DNV-RP-B401:<br \/>\n  &#8211; Inox ng\u1eadp n\u01b0\u1edbc th\u01b0\u1eddng kh\u00f4ng c\u1ea7n CP ri\u00eang n\u1ebfu \u0111\u00e3 ch\u1ecdn \u0111\u00fang m\u00e1c; nh\u01b0ng n\u1ebfu gh\u00e9p v\u1edbi th\u00e9p carbon \u0111\u00e3 CP, inox s\u1ebd b\u1ecb ph\u00e2n c\u1ef1c \u00e2m \u2014 c\u1ea7n ki\u1ec3m so\u00e1t \u0111i\u1ec7n th\u1ebf \u0111\u1ec3 tr\u00e1nh gi\u00f2n do hydro \u1edf v\u1eadt li\u1ec7u \u0111\u1ed9 b\u1ec1n cao\/fastener.<br \/>\n  &#8211; Gi\u1eef \u0111i\u1ec7n th\u1ebf CP trong d\u1ea3i khuy\u1ebfn ngh\u1ecb (v\u00ed d\u1ee5 ~\u22120,80 \u0111\u1ebfn \u22121,05 V so v\u1edbi Ag\/AgCl) v\u00e0 tr\u00e1nh \u201coverprotection\u201d.<\/p>\n<h2 id=\"toc-6-van-hanh-va-bao-tri-nhung-diem-tao-khac-biet\">V\u1eadn h\u00e0nh v\u00e0 b\u1ea3o tr\u00ec: nh\u1eefng \u0111i\u1ec3m t\u1ea1o kh\u00e1c bi\u1ec7t<\/h2>\n<p>&#8211; R\u1eeda n\u01b0\u1edbc ng\u1ecdt \u0111\u1ecbnh k\u1ef3 cho b\u1ec1 m\u1eb7t 316L\/duplex \u1edf kh\u00ed quy\u1ec3n\/splash \u0111\u1ec3 cu\u1ed1n tr\u00f4i mu\u1ed1i \u0111\u1ecdng.<br \/>\n&#8211; Ki\u1ec3m so\u00e1t biofouling: clo ho\u00e1 nh\u1eb9\/biocide theo ti\u00eau chu\u1ea9n an to\u00e0n m\u00f4i tr\u01b0\u1eddng; duy tr\u00ec l\u01b0u t\u1ed1c t\u1ed1i thi\u1ec3u trong \u1ed1ng n\u01b0\u1edbc bi\u1ec3n.<br \/>\n&#8211; Ki\u1ec3m tra bu l\u00f4ng\/b\u00edch: si\u1ebft l\u1ea1i m\u00f4-men, thay gasket khi c\u00f3 k\u1ebd h\u1edf\/b\u1eb1ng ch\u1ee9ng r\u00f2 r\u1ec9 mu\u1ed1i.<br \/>\n&#8211; Gi\u00e1m s\u00e1t CP: \u0111o \u0111i\u1ec7n th\u1ebf tham chi\u1ebfu Ag\/AgCl \u0111\u1ecbnh k\u1ef3; ki\u1ec3m tra \u0103n m\u00f2n r\u1ed7 c\u1ee5c b\u1ed9 b\u1eb1ng PT\/boroscope c\u00e1c v\u1ecb tr\u00ed k\u1ebd h\u1edf.<br \/>\n&#8211; L\u1eadp l\u1ecbch n\u1ed9i soi\/si\u00eau \u00e2m cho \u1ed1ng n\u01b0\u1edbc bi\u1ec3n v\u00e0 v\u00f9ng HAZ m\u1ed1i h\u00e0n.<\/p>\n<h2 id=\"toc-7-quy-trinh-6-buoc-chon-inox-cho-ngoai-khoi\">Quy tr\u00ecnh 6 b\u01b0\u1edbc ch\u1ecdn Inox cho ngo\u00e0i kh\u01a1i<\/h2>\n<p>1) X\u00e1c \u0111\u1ecbnh v\u00f9ng ti\u1ebfp x\u00fac: kh\u00ed quy\u1ec3n, splash, ng\u1eadp, nhi\u1ec7t \u0111\u1ed9, l\u01b0u t\u1ed1c.<br \/>\n2) X\u00e1c \u0111\u1ecbnh m\u00f4i tr\u01b0\u1eddng \u0111\u1eb7c bi\u1ec7t: H2S (sour), halide cao, MIC r\u1ee7i ro, \u00e1p l\u1ef1c.<br \/>\n3) Ch\u1ecdn m\u00e1c d\u1ef1a PREN v\u00e0 ti\u00eau chu\u1ea9n: \u226540 cho splash; \u226535 cho ng\u1eadp; 316L ch\u1ec9 cho kh\u00ed quy\u1ec3n s\u1ea1ch.<br \/>\n4) Ki\u1ec3m tra r\u00e0ng bu\u1ed9c ch\u1ebf t\u1ea1o: kh\u1ea3 n\u0103ng h\u00e0n, s\u1eb5n c\u00f3, k\u00edch th\u01b0\u1edbc, ch\u1ee9ng ch\u1ec9 (EN 10204 3.1\/3.2).<br \/>\n5) Thi\u1ebft k\u1ebf ch\u1ed1ng k\u1ebd h\u1edf\/galvanic; l\u00ean k\u1ebf ho\u1ea1ch x\u1eed l\u00fd b\u1ec1 m\u1eb7t v\u00e0 QA\/QC.<br \/>\n6) T\u00ednh chi ph\u00ed v\u00f2ng \u0111\u1eddi (LCCA) v\u00e0 r\u1ee7i ro d\u1eebng m\u00e1y \u0111\u1ec3 ch\u1ed1t ph\u01b0\u01a1ng \u00e1n.<\/p>\n<h2 id=\"toc-8-so-sanh-chi-phi-loi-ich-theo-vong-doi\">So s\u00e1nh chi ph\u00ed \u2013 l\u1ee3i \u00edch theo v\u00f2ng \u0111\u1eddi<\/h2>\n<p>&#8211; Th\u1ef1c t\u1ebf d\u1ef1 \u00e1n cho th\u1ea5y 316L trong splash th\u01b0\u1eddng c\u1ea7n thay s\u1edbm (2\u20135 n\u0103m), g\u00e2y downtime l\u1edbn.<br \/>\n&#8211; Chi ph\u00ed t\u01b0\u01a1ng \u0111\u1ed1i v\u1eadt li\u1ec7u (tham kh\u1ea3o th\u1ecb tr\u01b0\u1eddng, c\u00f3 th\u1ec3 bi\u1ebfn \u0111\u1ed9ng): 316L = 1.0; 2205 \u2248 1.3\u20131.5; 2507\/6Mo \u2248 1.7\u20132.2.<br \/>\n&#8211; Tuy v\u1eady, t\u1ed5ng chi ph\u00ed v\u00f2ng \u0111\u1eddi (LCC) c\u1ee7a 2205\/2507 th\u01b0\u1eddng th\u1ea5p h\u01a1n 316L 20\u201340% cho h\u1ec7 n\u01b0\u1edbc bi\u1ec3n\/lan can splash do gi\u1ea3m s\u1eeda ch\u1eefa, d\u1eebng m\u00e1y v\u00e0 r\u1ee7i ro an to\u00e0n.<\/p>\n<h2 id=\"toc-9-khuyen-nghi-nhanh-theo-dieu-kien-bien-dong-viet-na\">Khuy\u1ebfn ngh\u1ecb nhanh theo \u0111i\u1ec1u ki\u1ec7n Bi\u1ec3n \u0110\u00f4ng (Vi\u1ec7t Nam)<\/h2>\n<p>&#8211; Nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc 27\u201330\u00b0C, \u0111\u1ed9 m\u1eb7n 33\u201334\u2030, b\u1ee9c x\u1ea1 UV cao \u2192 m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n n\u1eb7ng, \u0111\u1eb7c bi\u1ec7t splash.<br \/>\n&#8211; G\u1ee3i \u00fd:<br \/>\n  &#8211; Splash\/\u0111\u01b0\u1eddng \u1ed1ng n\u01b0\u1edbc bi\u1ec3n: 2507 ho\u1eb7c 6Mo; 2205 cho \u0111i\u1ec1u ki\u1ec7n \u00edt kh\u1eafc nghi\u1ec7t h\u01a1n.<br \/>\n  &#8211; Kh\u00ed quy\u1ec3n c\u00f3 m\u00e1i che: 316L v\u1edbi b\u1ec1 m\u1eb7t m\u1ecbn + r\u1eeda n\u01b0\u1edbc ng\u1ecdt \u0111\u1ecbnh k\u1ef3; g\u1ea7n m\u00e9p boong\/s\u01b0\u01a1ng mu\u1ed1i d\u00e0y \u2192 2205.<br \/>\n  &#8211; Fasteners ngo\u00e0i tr\u1eddi\/splash: duplex\/super duplex theo ASTM A1082; b\u00f4i m\u1ee1 ch\u1ed1ng k\u1eb9t.<\/p>\n<h2 id=\"toc-10-san-pham-va-tieu-chuan-inox-cuong-thinh-cung-cap\">S\u1ea3n ph\u1ea9m v\u00e0 ti\u00eau chu\u1ea9n Inox Cuong Thinh cung c\u1ea5p<\/h2>\n<p>&#8211; \u1ed0ng\/t\u1ea5m\/thanh: 316L (1.4404), 2205 (1.4462), 2507 (1.4410), 904L (1.4539), 254SMO (1.4547).<br \/>\n&#8211; Ti\u00eau chu\u1ea9n v\u1eadt li\u1ec7u: ASTM A312\/A790 (\u1ed1ng), ASTM A240 (t\u1ea5m), ASTM A182 (m\u1eb7t b\u00edch), ASTM A403\/A815 (c\u00fat, t\u00ea), ASTM A1082 (bulong duplex).<br \/>\n&#8211; Ch\u1ee9ng ch\u1ec9 xu\u1ea5t x\u01b0\u1edfng EN 10204 3.1; theo y\u00eau c\u1ea7u 3.2\/NORSOK M-650 \u0111\u1ed1i v\u1edbi m\u00e1c cao.<\/p>\n<h2 id=\"toc-11-nguon-tham-khao-chinh\">Ngu\u1ed3n tham kh\u1ea3o ch\u00ednh<\/h2>\n<p>&#8211; ISO 21457: Materials selection and corrosion control for oil and gas production systems.<br \/>\n&#8211; NORSOK M-001: Materials selection; NORSOK M-650: Qualification of manufacturers of special materials.<br \/>\n&#8211; NACE MR0175\/ISO 15156: Materials for use in H2S-containing environments.<br \/>\n&#8211; DNV-RP-B401: Cathodic protection design.<br \/>\n&#8211; ASTM G48: Pitting and crevice corrosion testing of stainless steels.<br \/>\n&#8211; Outokumpu Corrosion Handbook; Alleima\/Sandvik technical datasheets for 2205\/2507\/254SMO (PREN, h\u01b0\u1edbng d\u1eabn h\u00e0n).<\/p>\n<h2 id=\"toc-12-ket-luan\">K\u1ebft lu\u1eadn<\/h2>\n<p>&#8211; Ch\u00eca kh\u00f3a ch\u1ed1ng \u0103n m\u00f2n ngo\u00e0i kh\u01a1i l\u00e0 ch\u1ecdn \u0111\u00fang m\u00e1c Inox theo PREN v\u00e0 ti\u00eau chu\u1ea9n: 316L cho kh\u00ed quy\u1ec3n s\u1ea1ch, 2205 cho n\u01b0\u1edbc bi\u1ec3n th\u00f4ng th\u01b0\u1eddng, 2507\/6Mo cho splash\/n\u01b0\u1edbc \u1ea5m kh\u1eafc nghi\u1ec7t.<br \/>\n&#8211; Thi\u1ebft k\u1ebf ph\u1ea3i lo\u1ea1i b\u1ecf k\u1ebd h\u1edf, c\u00e1ch \u0111i\u1ec7n m\u1ed1i gh\u00e9p d\u1ecb kim, ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t v\u00e0 th\u1ef1c hi\u1ec7n h\u00e0n\u2013passivation chu\u1ea9n.<br \/>\n&#8211; V\u1eadn h\u00e0nh \u0111\u00fang (r\u1eeda n\u01b0\u1edbc ng\u1ecdt, ki\u1ec3m so\u00e1t biofouling, gi\u00e1m s\u00e1t CP) k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd v\u00e0 gi\u1ea3m LCC \u0111\u00e1ng k\u1ec3.<\/p>\n<p>C\u1ea7n t\u01b0 v\u1ea5n ch\u1ecdn m\u00e1c, ph\u01b0\u01a1ng \u00e1n ch\u1ebf t\u1ea1o v\u00e0 b\u00e1o gi\u00e1 t\u1ed1t nh\u1ea5t cho d\u1ef1 \u00e1n ngo\u00e0i kh\u01a1i? Li\u00ean h\u1ec7 Inox Cuong Thinh: Hotline 0343.417.281 \u2022 Email inoxcongnghiep.cuongthinh@gmail.com<\/p>\n","protected":false},"excerpt":{"rendered":"<p>H\u01b0\u1edbng d\u1eabn ch\u1ecdn Inox, thi\u1ebft k\u1ebf, h\u00e0n v\u00e0 b\u1ea3o tr\u00ec ch\u1ed1ng \u0103n m\u00f2n cho gi\u00e0n khoan\/c\u00f4ng tr\u00ecnh bi\u1ec3n: so s\u00e1nh 316L, duplex, super duplex, 6Mo theo ISO\/NORSOK.<\/p>\n","protected":false},"author":7,"featured_media":1058,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-1784","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\/1784","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=1784"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/1784\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1058"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=1784"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=1784"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=1784"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}