{"id":1209,"date":"2025-10-21T12:34:21","date_gmt":"2025-10-21T05:34:21","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/ong-inox-han-hay-ong-inox-duc-tieu-chi-chon-dung-cho-du-an\/"},"modified":"2025-10-21T12:34:21","modified_gmt":"2025-10-21T05:34:21","slug":"ong-inox-han-hay-ong-inox-duc-tieu-chi-chon-dung-cho-du-an","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/ong-inox-han-hay-ong-inox-duc-tieu-chi-chon-dung-cho-du-an\/","title":{"rendered":"\u1ed0ng inox h\u00e0n hay \u1ed1ng inox \u0111\u00fac: ti\u00eau ch\u00ed ch\u1ecdn \u0111\u00fang cho d\u1ef1 \u00e1n"},"content":{"rendered":"<div class=\"custom-toc\">\n<h3>N\u1ed9i dung ch\u00ednh<\/h3>\n<ul>\n<li><a href=\"#toc-0-ong-inox-han-va-ong-inox-duc-la-gi-lam-ro-thuat-ng\">\u1ed0ng inox h\u00e0n v\u00e0 \u1ed1ng inox \u201c\u0111\u00fac\u201d l\u00e0 g\u00ec? L\u00e0m r\u00f5 thu\u1eadt ng\u1eef<\/a><\/li>\n<li><a href=\"#toc-1-quy-trinh-san-xuat-va-tac-dong-den-tinh-nang\">Quy tr\u00ecnh s\u1ea3n xu\u1ea5t v\u00e0 t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn t\u00ednh n\u0103ng<\/a><\/li>\n<li><a href=\"#toc-2-so-sanh-theo-tieu-chi-ky-thuat-quan-trong\">So s\u00e1nh theo ti\u00eau ch\u00ed k\u1ef9 thu\u1eadt quan tr\u1ecdng<\/a><\/li>\n<li><a href=\"#toc-3-tieu-chuan-kich-thuoc-va-ky-hieu-can-nam\">Ti\u00eau chu\u1ea9n, k\u00edch th\u01b0\u1edbc v\u00e0 k\u00fd hi\u1ec7u c\u1ea7n n\u1eafm<\/a><\/li>\n<li><a href=\"#toc-4-kinh-te-va-nguon-cung-tai-viet-nam-goc-nhin-thi-tr\">Kinh t\u1ebf v\u00e0 ngu\u1ed3n cung t\u1ea1i Vi\u1ec7t Nam (g\u00f3c nh\u00ecn th\u1ecb tr\u01b0\u1eddng H\u00e0 N\u1ed9i)<\/a><\/li>\n<li><a href=\"#toc-5-ung-dung-khuyen-nghi-theo-nganh\">\u1ee8ng d\u1ee5ng khuy\u1ebfn ngh\u1ecb theo ng\u00e0nh<\/a><\/li>\n<li><a href=\"#toc-6-chon-mac-thep-va-be-mat-dung-ngay-tu-dau\">Ch\u1ecdn m\u00e1c th\u00e9p v\u00e0 b\u1ec1 m\u1eb7t \u0111\u00fang ngay t\u1eeb \u0111\u1ea7u<\/a><\/li>\n<li><a href=\"#toc-7-thiet-ke-ap-suat-ghi-chu-thuc-hanh\">Thi\u1ebft k\u1ebf \u00e1p su\u1ea5t: ghi ch\u00fa th\u1ef1c h\u00e0nh<\/a><\/li>\n<li><a href=\"#toc-8-quy-trinh-chon-5-buoc-cho-moi-du-an\">Quy tr\u00ecnh ch\u1ecdn 5 b\u01b0\u1edbc cho m\u1ecdi d\u1ef1 \u00e1n<\/a><\/li>\n<li><a href=\"#toc-9-kiem-tra-nghiem-thu-va-gia-cong-tai-xuong\">Ki\u1ec3m tra, nghi\u1ec7m thu v\u00e0 gia c\u00f4ng t\u1ea1i x\u01b0\u1edfng<\/a><\/li>\n<li><a href=\"#toc-10-nhung-loi-pho-bien-can-tranh\">Nh\u1eefng l\u1ed7i ph\u1ed5 bi\u1ebfn c\u1ea7n tr\u00e1nh<\/a><\/li>\n<li><a href=\"#toc-11-ket-luan-nen-chon-loai-nao\">K\u1ebft lu\u1eadn: N\u00ean ch\u1ecdn lo\u1ea1i n\u00e0o?<\/a><\/li>\n<\/ul>\n<\/div>\n<p>Trong c\u00e1c h\u1ec7 th\u1ed1ng \u1ed1ng v\u00e0 h\u1ed9p inox, l\u1ef1a ch\u1ecdn gi\u1eefa \u1ed1ng inox h\u00e0n (welded) v\u00e0 \u1ed1ng inox \u0111\u00fac (seamless) \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn \u0111\u1ed9 an to\u00e0n, tu\u1ed5i th\u1ecd v\u00e0 chi ph\u00ed c\u1ee7a d\u1ef1 \u00e1n. B\u00e0i vi\u1ebft n\u00e0y cung c\u1ea5p so s\u00e1nh k\u1ef9 thu\u1eadt, ti\u00eau chu\u1ea9n, \u1ee9ng d\u1ee5ng v\u00e0 quy tr\u00ecnh ch\u1ecdn nhanh \u0111\u1ec3 b\u1ea1n quy\u1ebft \u0111\u1ecbnh \u0111\u00fang cho t\u1eebng \u0111i\u1ec1u ki\u1ec7n l\u00e0m vi\u1ec7c.<\/p>\n<h2 id=\"toc-0-ong-inox-han-va-ong-inox-duc-la-gi-lam-ro-thuat-ng\">\u1ed0ng inox h\u00e0n v\u00e0 \u1ed1ng inox \u201c\u0111\u00fac\u201d l\u00e0 g\u00ec? L\u00e0m r\u00f5 thu\u1eadt ng\u1eef<\/h2>\n<p>&#8211; \u1ed0ng inox h\u00e0n (Welded): \u0111\u01b0\u1ee3c cu\u1ed9n t\u1eeb b\u0103ng inox (coil\/sheet) v\u00e0 h\u00e0n d\u1ecdc b\u1eb1ng TIG\/laser\/ERW, sau \u0111\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u1ee7 dung d\u1ecbch (solution anneal), t\u1ea9y g\u1ec9 \u2013 th\u1ee5 \u0111\u1ed9ng (pickling &#038; passivation). C\u00f3 th\u1ec3 m\u00e0i x\u00f3a g\u1edd h\u00e0n trong (bead removal) cho d\u00f2ng ch\u1ea3y\/sanitary.<br \/>\n&#8211; \u1ed0ng inox \u201c\u0111\u00fac\u201d (Seamless): t\u1ea1i Vi\u1ec7t Nam th\u01b0\u1eddng g\u1ecdi \u201c\u1ed1ng \u0111\u00fac\u201d nh\u01b0ng th\u1ef1c t\u1ebf \u0111\u01b0\u1ee3c xuy\u00ean \u2013 k\u00e9o t\u1eeb ph\u00f4i \u0111\u1eb7c (piercing + extrusion\/pilger + cold draw). Kh\u00f4ng c\u00f3 m\u1ed1i h\u00e0n d\u1ecdc.<\/p>\n<p>L\u01b0u \u00fd: \u201c\u0110\u00fac\u201d \u1edf \u0111\u00e2y kh\u00f4ng ph\u1ea3i \u0111\u00fac khu\u00f4n; c\u00e1ch g\u1ecdi truy\u1ec1n th\u1ed1ng \u0111\u1ec3 ph\u00e2n bi\u1ec7t v\u1edbi \u201ch\u00e0n\u201d.<\/p>\n<h2 id=\"toc-1-quy-trinh-san-xuat-va-tac-dong-den-tinh-nang\">Quy tr\u00ecnh s\u1ea3n xu\u1ea5t v\u00e0 t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn t\u00ednh n\u0103ng<\/h2>\n<h3>\u1ed0ng inox h\u00e0n<\/h3>\n<p>&#8211; Ngu\u1ed3n v\u1eadt li\u1ec7u: b\u0103ng 2B\/BA, th\u01b0\u1eddng \u0111\u1ed3ng \u0111\u1ec1u v\u1ec1 th\u00e0nh ph\u1ea7n v\u00e0 \u0111\u1ed9 d\u00e0y.<br \/>\n&#8211; Ph\u01b0\u01a1ng ph\u00e1p h\u00e0n: TIG\/laser cho \u1ed1ng c\u00f4ng nghi\u1ec7p; ERW cho \u1ed1ng c\u01a1 kh\u00ed\/trang tr\u00ed.<br \/>\n&#8211; X\u1eed l\u00fd sau h\u00e0n: \u1ee7 dung d\u1ecbch + t\u1ea9y g\u1ec9 \u2013 th\u1ee5 \u0111\u1ed9ng gi\u00fap kh\u00f4i ph\u1ee5c ch\u1ed1ng \u0103n m\u00f2n \u1edf v\u00f9ng \u1ea3nh h\u01b0\u1edfng nhi\u1ec7t (HAZ); t\u00f9y y\u00eau c\u1ea7u c\u00f3 th\u1ec3 100% NDT (RT\/UT) m\u1ed1i h\u00e0n.<br \/>\n&#8211; \u01afu th\u1ebf: k\u00edch th\u01b0\u1edbc l\u1edbn (OD t\u1edbi 1219 mm), dung sai OD \u0111\u1eb9p, chi ph\u00ed th\u1ea5p, ngu\u1ed3n cung d\u1ed3i d\u00e0o.<br \/>\n&#8211; \u0110i\u1ec3m c\u1ea7n ki\u1ec3m so\u00e1t: m\u1ed1i h\u00e0n l\u00e0 v\u1ecb tr\u00ed nh\u1ea1y c\u1ea3m n\u1ebfu kh\u00f4ng \u1ee7 dung d\u1ecbch ho\u1eb7c kh\u00f4ng x\u1eed l\u00fd b\u1ec1 m\u1eb7t \u0111\u00fang; y\u00eau c\u1ea7u v\u1eadt li\u1ec7u L (304L\/316L) \u0111\u1ec3 tr\u00e1nh nh\u1ea1y c\u1ea3m h\u00f3a.<\/p>\n<h3>\u1ed0ng inox \u0111\u00fac (seamless)<\/h3>\n<p>&#8211; T\u1ea1o h\u00ecnh: xuy\u00ean l\u1ed7 ph\u00f4i, c\u00e1n n\u00f3ng, k\u00e9o ngu\u1ed9i; \u1ee7 dung d\u1ecbch v\u00e0 th\u1ee5 \u0111\u1ed9ng h\u00f3a.<br \/>\n&#8211; \u01afu th\u1ebf: kh\u00f4ng c\u00f3 m\u1ed1i h\u00e0n d\u1ecdc \u2192 ph\u00e2n b\u1ed1 \u1ee9ng su\u1ea5t t\u1ed1t; ph\u00f9 h\u1ee3p \u00e1p l\u1ef1c\/nhi\u1ec7t \u0111\u1ed9 cao, chu tr\u00ecnh t\u1ea3i l\u1eb7p, xung \u00e1p.<br \/>\n&#8211; \u0110i\u1ec3m c\u1ea7n l\u01b0u \u00fd: dung sai OD\/WT ch\u1eb7t nh\u01b0ng \u0111\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u th\u00e0nh d\u00e0y c\u00f3 th\u1ec3 bi\u1ebfn thi\u00ean h\u01a1n so v\u1edbi \u1ed1ng h\u00e0n; gi\u00e1 th\u00e0nh cao; k\u00edch th\u01b0\u1edbc l\u1edbn th\u01b0\u1eddng gi\u1edbi h\u1ea1n \u2264 24&#8243; (b\u00ecnh th\u01b0\u1eddng \u2264 16&#8243;).<\/p>\n<h2 id=\"toc-2-so-sanh-theo-tieu-chi-ky-thuat-quan-trong\">So s\u00e1nh theo ti\u00eau ch\u00ed k\u1ef9 thu\u1eadt quan tr\u1ecdng<\/h2>\n<p>&#8211; \u00c1p su\u1ea5t \u2013 nhi\u1ec7t \u0111\u1ed9:<br \/>\n  &#8211; \u1ed0ng \u0111\u00fac: \u01b0u ti\u00ean cho \u00e1p su\u1ea5t cao, nhi\u1ec7t \u0111\u1ed9 cao, chu k\u1ef3 nhi\u1ec7t\/\u00e1p ph\u1ee9c t\u1ea1p, h\u01a1i qu\u00e1 nhi\u1ec7t, h\u00f3a d\u1ea7u.<br \/>\n  &#8211; \u1ed0ng h\u00e0n: \u0111\u00e1p \u1ee9ng t\u1ed1t c\u00e1c h\u1ec7 th\u1ed1ng \u00e1p trung b\u00ecnh \u2013 th\u1ea5p n\u1ebfu m\u1ed1i h\u00e0n \u0111\u1ea1t chu\u1ea9n v\u00e0 x\u1eed l\u00fd nhi\u1ec7t \u0111\u00fang. Theo nhi\u1ec1u ti\u00eau chu\u1ea9n, h\u1ec7 s\u1ed1 m\u1ed1i h\u00e0n (E) c\u00f3 th\u1ec3 0.85\u20131.0; seamless m\u1eb7c \u0111\u1ecbnh E=1.0.<br \/>\n&#8211; Ch\u1ed1ng \u0103n m\u00f2n:<br \/>\n  &#8211; C\u00f9ng m\u00e1c th\u00e9p v\u00e0 x\u1eed l\u00fd b\u1ec1 m\u1eb7t t\u01b0\u01a1ng \u0111\u01b0\u01a1ng, kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n t\u01b0\u01a1ng \u0111\u01b0\u01a1ng. Tuy nhi\u00ean m\u1ed1i h\u00e0n k\u00e9m x\u1eed l\u00fd c\u00f3 th\u1ec3 l\u00e0 \u0111i\u1ec3m y\u1ebfu.<br \/>\n  &#8211; D\u00f9ng v\u1eadt li\u1ec7u L (304L\/316L) v\u00e0 y\u00eau c\u1ea7u pickling\u2013passivation \u0111\u1ec3 gi\u1ea3m nguy c\u01a1 nh\u1ea1y c\u1ea3m h\u00f3a, \u0103n m\u00f2n k\u1ebd.<br \/>\n&#8211; Dung sai \u2013 b\u1ec1 m\u1eb7t:<br \/>\n  &#8211; \u1ed0ng h\u00e0n: OD v\u00e0 \u0111\u1ed9 th\u1eb3ng th\u01b0\u1eddng \u0111\u1eb9p; c\u00f3 th\u1ec3 x\u00f3a g\u1edd h\u00e0n, \u0111\u00e1nh b\u00f3ng n\u1ed9i\/ngo\u1ea1i, \u0111\u1ea1t b\u1ec1 m\u1eb7t sanitary\/electropolish (ASTM A270\/ASME BPE).<br \/>\n  &#8211; \u1ed0ng \u0111\u00fac: th\u00e0nh d\u00e0y \u0111\u1ed3ng nh\u1ea5t v\u1ec1 c\u01a1 t\u00ednh, nh\u01b0ng \u0111\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u WT c\u00f3 th\u1ec3 k\u00e9m h\u01a1n; b\u1ec1 m\u1eb7t trong kh\u00f4ng c\u00f3 \u0111\u01b0\u1eddng h\u00e0n.<br \/>\n&#8211; C\u1ee1 k\u00edch th\u01b0\u1edbc v\u00e0 \u0111\u1ed9 d\u00e0y:<br \/>\n  &#8211; \u1ed0ng h\u00e0n: d\u1ec5 mua c\u1ee1 l\u1edbn, \u0111\u1ed9 d\u00e0y m\u1ecfng (10S) \u0111\u1ebfn d\u00e0y (40S, 80S) cho c\u00f4ng nghi\u1ec7p ph\u1ed5 th\u00f4ng.<br \/>\n  &#8211; \u1ed0ng \u0111\u00fac: m\u1ea1nh \u1edf c\u1ee1 nh\u1ecf \u2013 trung v\u00e0 WT d\u00e0y cho \u00e1p su\u1ea5t cao.<br \/>\n&#8211; Gia c\u00f4ng, u\u1ed1n, ren c\u1eaft:<br \/>\n  &#8211; C\u1ea3 hai \u0111\u1ec1u h\u00e0n l\u1eafp t\u1ed1t; \u1ed1ng \u0111\u00fac ch\u1ecbu u\u1ed1n\/lo\u00e9 \u0111\u1ea7u t\u1ed1t trong m\u00f4i tr\u01b0\u1eddng \u00e1p cao; \u1ed1ng h\u00e0n n\u00ean ki\u1ec3m so\u00e1t v\u1ecb tr\u00ed m\u1ed1i h\u00e0n khi u\u1ed1n.<br \/>\n&#8211; Ki\u1ec3m \u0111\u1ecbnh \u2013 NDT:<br \/>\n  &#8211; \u1ed0ng h\u00e0n: y\u00eau c\u1ea7u RT\/UT \u0111\u01b0\u1eddng h\u00e0n theo d\u1ef1 \u00e1n \u0111\u1ec3 \u0111\u1ea1t E=1.0 theo m\u00e3 thi\u1ebft k\u1ebf (ki\u1ec3m tra trong ASME B31.x).<br \/>\n  &#8211; \u1ed0ng \u0111\u00fac: NDT khuy\u1ebft t\u1eadt th\u1ec3 t\u00edch th\u00e2n \u1ed1ng (ET\/UT), th\u1eed th\u1ee7y l\u1ef1c\/kh\u00ed theo ti\u00eau chu\u1ea9n.<\/p>\n<h2 id=\"toc-3-tieu-chuan-kich-thuoc-va-ky-hieu-can-nam\">Ti\u00eau chu\u1ea9n, k\u00edch th\u01b0\u1edbc v\u00e0 k\u00fd hi\u1ec7u c\u1ea7n n\u1eafm<\/h2>\n<p>&#8211; K\u00edch th\u01b0\u1edbc:<br \/>\n  &#8211; ASME B36.19M: k\u00edch th\u01b0\u1edbc \u1ed1ng inox: SCH 5S, 10S, 40S, 80S&#8230;<br \/>\n  &#8211; JIS G3459, EN 10217-7 (h\u00e0n), EN 10216-5 (\u0111\u00fac) l\u00e0 h\u1ec7 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng ph\u1ed5 bi\u1ebfn.<br \/>\n&#8211; V\u1eadt li\u1ec7u\/ti\u00eau chu\u1ea9n s\u1ea3n ph\u1ea9m:<br \/>\n  &#8211; ASTM A312: \u1ed1ng inox austenitic cho d\u1ecbch v\u1ee5 \u00e1p l\u1ef1c (h\u00e0n &#038; \u0111\u00fac). M\u00e1c ph\u1ed5 bi\u1ebfn: TP304\/L, TP316\/L, 310S, 321.<br \/>\n  &#8211; ASTM A269: \u1ed1ng inox cho truy\u1ec1n d\u1eabn t\u1ed5ng qu\u00e1t (th\u01b0\u1eddng seamless ho\u1eb7c welded v\u1edbi y\u00eau c\u1ea7u cao), d\u00f9ng cho c\u00f4ng ngh\u1ec7 CKD\/thi\u1ebft b\u1ecb.<br \/>\n  &#8211; ASTM A213: \u1ed1ng n\u1ed3i h\u01a1i, qu\u00e1 nhi\u1ec7t (seamless).<br \/>\n  &#8211; ASTM A554: \u1ed1ng c\u01a1 kh\u00ed\/trang tr\u00ed (welded, kh\u00f4ng d\u00f9ng cho \u00e1p l\u1ef1c).<br \/>\n  &#8211; ASTM A270\/ASME BPE: \u1ed1ng sanitary cho th\u1ef1c ph\u1ea9m \u2013 d\u01b0\u1ee3c (welded v\u1edbi bead control, b\u1ec1 m\u1eb7t trong cao).<br \/>\n&#8211; Gi\u1ea5y ch\u1ee9ng nh\u1eadn: EN 10204 3.1 (MTC), \u0111\u00e1nh d\u1ea5u nhi\u1ec7t luy\u1ec7n, heat number, xu\u1ea5t x\u1ee9, m\u00e1c, k\u00edch th\u01b0\u1edbc, chu\u1ea9n.<\/p>\n<h2 id=\"toc-4-kinh-te-va-nguon-cung-tai-viet-nam-goc-nhin-thi-tr\">Kinh t\u1ebf v\u00e0 ngu\u1ed3n cung t\u1ea1i Vi\u1ec7t Nam (g\u00f3c nh\u00ecn th\u1ecb tr\u01b0\u1eddng H\u00e0 N\u1ed9i)<\/h2>\n<p>&#8211; Ch\u00eanh l\u1ec7ch chi ph\u00ed: \u1ed1ng h\u00e0n th\u01b0\u1eddng r\u1ebb h\u01a1n 10\u201340% so v\u1edbi \u1ed1ng \u0111\u00fac c\u00f9ng m\u00e1c\/k\u00edch th\u01b0\u1edbc (t\u00f9y OD\/WT v\u00e0 xu\u1ea5t x\u1ee9).<br \/>\n&#8211; Ngu\u1ed3n h\u00e0ng:<br \/>\n  &#8211; \u1ed0ng h\u00e0n c\u00f4ng nghi\u1ec7p A312\/A778: s\u1eb5n c\u1ee1 DN15\u2013DN400, SCH10S\/40S; xu\u1ea5t x\u1ee9 Trung Qu\u1ed1c, \u0110\u00e0i Loan, H\u00e0n, Ch\u00e2u \u00c2u.<br \/>\n  &#8211; \u1ed0ng \u0111\u00fac A312\/A213: s\u1eb5n c\u1ee1 DN8\u2013DN150, SCH40S\/80S; c\u1ee1 l\u1edbn \u0111\u1eb7t h\u00e0ng.<br \/>\n  &#8211; \u1ed0ng trang tr\u00ed A554 (201\/304): phong ph\u00fa c\u1ee1 vu\u00f4ng, ch\u1eef nh\u1eadt, tr\u00f2n; kh\u00f4ng d\u00f9ng cho \u00e1p l\u1ef1c.<br \/>\n&#8211; Lead-time: h\u00e0ng ph\u1ed5 th\u00f4ng 1\u20133 ng\u00e0y; h\u00e0ng \u0111\u1eb7c ch\u1ee7ng (duplex 2205, 310S, BPE) 3\u20138 tu\u1ea7n.<\/p>\n<h2 id=\"toc-5-ung-dung-khuyen-nghi-theo-nganh\">\u1ee8ng d\u1ee5ng khuy\u1ebfn ngh\u1ecb theo ng\u00e0nh<\/h2>\n<h3>N\u00ean ch\u1ecdn \u1ed1ng inox h\u00e0n khi<\/h3>\n<p>&#8211; H\u1ec7 th\u1ed1ng n\u01b0\u1edbc s\u1ea1ch, n\u01b0\u1edbc c\u00f4ng ngh\u1ec7, PCCC, HVAC, x\u1eed l\u00fd n\u01b0\u1edbc: 304\/316 h\u00e0n, SCH10S\u201340S theo \u00e1p su\u1ea5t thi\u1ebft k\u1ebf.<br \/>\n&#8211; C\u00f4ng nghi\u1ec7p th\u1ef1c ph\u1ea9m \u2013 \u0111\u1ed3 u\u1ed1ng: \u1ed1ng h\u00e0n sanitary (ASTM A270\/BPE), h\u00e0n TIG\/laser, x\u00f3a g\u1edd trong, \u0111\u00e1nh b\u00f3ng n\u1ed9i\/ngo\u1ea1i\/pickling, tri\u1ec7t ti\u00eau khe b\u00e1m b\u1ea9n.<br \/>\n&#8211; K\u1ebft c\u1ea5u, lan can, ki\u1ebfn tr\u00fac: \u1ed1ng A554 (304\/316); l\u01b0u \u00fd kh\u00f4ng d\u00f9ng cho \u00e1p l\u1ef1c.<br \/>\n&#8211; \u0110\u01b0\u1eddng \u1ed1ng h\u00f3a ch\u1ea5t \u0103n m\u00f2n nh\u1eb9 \u2013 trung b\u00ecnh \u1edf \u00e1p su\u1ea5t v\u1eeba: 304L\/316L h\u00e0n, y\u00eau c\u1ea7u \u1ee7 dung d\u1ecbch + th\u1ee5 \u0111\u1ed9ng h\u00f3a.<\/p>\n<h3>N\u00ean ch\u1ecdn \u1ed1ng inox \u0111\u00fac khi<\/h3>\n<p>&#8211; D\u1ecbch v\u1ee5 \u00e1p su\u1ea5t cao\/nhi\u1ec7t \u0111\u1ed9 cao, chu tr\u00ecnh xung \u00e1p: h\u01a1i b\u00e3o h\u00f2a\/qu\u00e1 nhi\u1ec7t, d\u1ea7u kh\u00ed, h\u00f3a d\u1ea7u, n\u1ed3i h\u01a1i (ASTM A312\/A213 seamless).<br \/>\n&#8211; \u0110\u01b0\u1eddng \u1ed1ng \u0111o\/l\u1ea5y m\u1eabu\/instrumentation nh\u1ecf: c\u1ea7n th\u00e0nh d\u00e0y \u1ed5n \u0111\u1ecbnh, kh\u00f4ng m\u1ed1i h\u00e0n d\u1ecdc (ASTM A269\/A213 seamless).<br \/>\n&#8211; M\u00f4i tr\u01b0\u1eddng r\u1ee7i ro cao, h\u1ec7 s\u1ed1 an to\u00e0n\/ki\u1ec3m \u0111\u1ecbnh nghi\u00eam: d\u1ec5 \u0111\u1ea1t E=1.0 m\u1eb7c \u0111\u1ecbnh, \u0111\u01a1n gi\u1ea3n h\u00f3a t\u00ednh to\u00e1n theo m\u00e3.<\/p>\n<h2 id=\"toc-6-chon-mac-thep-va-be-mat-dung-ngay-tu-dau\">Ch\u1ecdn m\u00e1c th\u00e9p v\u00e0 b\u1ec1 m\u1eb7t \u0111\u00fang ngay t\u1eeb \u0111\u1ea7u<\/h2>\n<p>&#8211; 201: ch\u1ec9 d\u00f9ng n\u1ed9i th\u1ea5t \u2013 kh\u00f4; kh\u00f4ng khuy\u1ebfn ngh\u1ecb ngo\u00e0i tr\u1eddi\/ven bi\u1ec3n\/\u0103n m\u00f2n.<br \/>\n&#8211; 304\/304L: \u0111a d\u1ee5ng; ch\u1ecdn 304L \u0111\u1ec3 h\u00e0n nhi\u1ec1u; d\u00f9ng cho n\u01b0\u1edbc, kh\u00ed, th\u1ef1c ph\u1ea9m.<br \/>\n&#8211; 316\/316L: chloride, ven bi\u1ec3n, h\u00f3a ch\u1ea5t n\u1eb7ng h\u01a1n; thi\u1ebft b\u1ecb CIP\/SIP.<br \/>\n&#8211; 310S\/321: nhi\u1ec7t \u0111\u1ed9 cao.<br \/>\n&#8211; Duplex 2205: chloride cao\/\u00e1p cao, ch\u1ed1ng SCC t\u1ed1t h\u01a1n austenitic.<br \/>\n&#8211; X\u1eed l\u00fd b\u1ec1 m\u1eb7t:<br \/>\n  &#8211; C\u00f4ng nghi\u1ec7p: pickling &#038; passivation sau h\u00e0n.<br \/>\n  &#8211; Sanitary: RA th\u1ea5p, electropolish, x\u00f3a g\u1edd m\u1ed1i h\u00e0n n\u1ed9i.<br \/>\n  &#8211; Ngo\u00e0i tr\u1eddi trang tr\u00ed: \u0111\u00e1nh b\u00f3ng hairline\/600\u2013800 grit.<\/p>\n<h2 id=\"toc-7-thiet-ke-ap-suat-ghi-chu-thuc-hanh\">Thi\u1ebft k\u1ebf \u00e1p su\u1ea5t: ghi ch\u00fa th\u1ef1c h\u00e0nh<\/h2>\n<p>&#8211; M\u00e3 thi\u1ebft k\u1ebf th\u01b0\u1eddng d\u00f9ng: ASME B31.3 (process), B31.1 (power), EN 13480, TCVN t\u01b0\u01a1ng \u0111\u01b0\u01a1ng.<br \/>\n&#8211; H\u1ec7 s\u1ed1 m\u1ed1i h\u00e0n (E\/Ej):<br \/>\n  &#8211; Seamless: 1.0.<br \/>\n  &#8211; Welded: 0.85\u20131.0 t\u00f9y lo\u1ea1i h\u00e0n v\u00e0 m\u1ee9c NDT\/\u1ee7 dung d\u1ecbch theo b\u1ea3ng trong m\u00e3. Mu\u1ed1n E=1.0 cho \u1ed1ng h\u00e0n, h\u00e3y ch\u1ec9 \u0111\u1ecbnh: h\u00e0n TIG\/laser, \u1ee7 dung d\u1ecbch, 100% RT\/UT m\u1ed1i h\u00e0n theo ti\u00eau chu\u1ea9n \u00e1p d\u1ee5ng.<br \/>\n&#8211; G\u1ee3i \u00fd nhanh (mang t\u00ednh tham kh\u1ea3o, ph\u1ea3i t\u00ednh theo m\u00e3):<br \/>\n  &#8211; N\u01b0\u1edbc\/NH3\/kh\u00ed n\u00e9n \u2264 10 bar: 10S th\u01b0\u1eddng \u0111\u1ee7 t\u1edbi DN150 (t\u00f9y nhi\u1ec7t \u0111\u1ed9).<br \/>\n  &#8211; H\u01a1i b\u00e3o h\u00f2a 10\u201316 bar: c\u00e2n nh\u1eafc 40S cho DN\u2264100; ki\u1ec3m tra \u1ee9ng su\u1ea5t\/k\u1ebft c\u1ea5u hangers.<br \/>\n  &#8211; H\u00f3a ch\u1ea5t \u0103n m\u00f2n: \u01b0u ti\u00ean 316L; t\u0103ng b\u1ec1 d\u00e0y n\u1ebfu c\u00f3 m\u00e0i m\u00f2n\/cavitation\/erosion.<\/p>\n<h2 id=\"toc-8-quy-trinh-chon-5-buoc-cho-moi-du-an\">Quy tr\u00ecnh ch\u1ecdn 5 b\u01b0\u1edbc cho m\u1ecdi d\u1ef1 \u00e1n<\/h2>\n<p>1) X\u00e1c \u0111\u1ecbnh \u00e1p su\u1ea5t \u2013 nhi\u1ec7t \u0111\u1ed9 \u2013 m\u00f4i ch\u1ea5t \u2013 \u0103n m\u00f2n (pH, chloride, nhi\u1ec7t).<br \/>\n2) Ch\u1ecdn m\u00e3 thi\u1ebft k\u1ebf v\u00e0 ti\u00eau chu\u1ea9n \u1ed1ng (ASME B31.x + ASTM A312\/A269\/A270\/A213\u2026).<br \/>\n3) Quy\u1ebft \u0111\u1ecbnh welded hay seamless d\u1ef1a tr\u00ean:<br \/>\n   &#8211; M\u1ee9c \u00e1p\/nhi\u1ec7t\/cycle; y\u00eau c\u1ea7u E; y\u00eau c\u1ea7u sanitary\/b\u1ec1 m\u1eb7t; OD\/WT.<br \/>\n4) Ch\u1ecdn m\u00e1c th\u00e9p (304L\/316L\/kh\u00e1c) v\u00e0 schedule theo t\u00ednh to\u00e1n.<br \/>\n5) Quy \u0111\u1ecbnh QA\/QC: MTC 3.1, NDT (RT\/UT\/ET), \u1ee7 dung d\u1ecbch, pickling\u2013passivation, x\u00f3a g\u1edd h\u00e0n (n\u1ebfu c\u1ea7n), PMI khi nh\u1eadn h\u00e0ng.<\/p>\n<h2 id=\"toc-9-kiem-tra-nghiem-thu-va-gia-cong-tai-xuong\">Ki\u1ec3m tra, nghi\u1ec7m thu v\u00e0 gia c\u00f4ng t\u1ea1i x\u01b0\u1edfng<\/h2>\n<p>&#8211; Khi nh\u1eadn h\u00e0ng:<br \/>\n  &#8211; Ki\u1ec3m tra nh\u00e3n \u2013 d\u1eadp: m\u00e1c, ti\u00eau chu\u1ea9n, heat number, size, schedule.<br \/>\n  &#8211; \u0110o OD\/WT\/\u0111\u1ed9 \u00f4van\/\u0111\u1ed9 th\u1eb3ng; soi m\u1ed1i h\u00e0n (\u1ed1ng h\u00e0n) \u2013 t\u00ecm r\u1ed7, ch\u1ea3y x\u1ec7, ch\u01b0a th\u1ea5u.<br \/>\n  &#8211; Y\u00eau c\u1ea7u MTC 3.1; th\u1eed th\u1ee7y l\u1ef1c theo ti\u00eau chu\u1ea9n; PMI ng\u1eabu nhi\u00ean.<br \/>\n&#8211; Gia c\u00f4ng \u2013 l\u1eafp \u0111\u1eb7t:<br \/>\n  &#8211; D\u00f9ng v\u1eadt li\u1ec7u h\u00e0n t\u01b0\u01a1ng th\u00edch (308L cho 304L; 316L d\u00f9ng 316L\/ER316L).<br \/>\n  &#8211; Ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ea7u v\u00e0o, tr\u00e1nh qu\u00e1 nhi\u1ec7t g\u00e2y bi\u1ebfn m\u00e0u\/gi\u00f2n h\u1ea1t.<br \/>\n  &#8211; T\u1ea9y g\u1ec9 \u2013 th\u1ee5 \u0111\u1ed9ng sau h\u00e0n; r\u1eeda s\u1ea1ch chloride.<br \/>\n  &#8211; \u0110\u1ecbnh v\u1ecb m\u1ed1i h\u00e0n tr\u00e1nh \u0111i\u1ec3m u\u1ed1n g\u1eaft\/\u0111\u1ee1 treo.<\/p>\n<h2 id=\"toc-10-nhung-loi-pho-bien-can-tranh\">Nh\u1eefng l\u1ed7i ph\u1ed5 bi\u1ebfn c\u1ea7n tr\u00e1nh<\/h2>\n<p>&#8211; D\u00f9ng \u1ed1ng A554 (trang tr\u00ed) cho h\u1ec7 \u00e1p l\u1ef1c.<br \/>\n&#8211; Ch\u1ecdn 201 cho m\u00f4i tr\u01b0\u1eddng \u1ea9m m\u1eb7n\/ngo\u00e0i tr\u1eddi \u2192 nhanh r\u1ec9.<br \/>\n&#8211; Kh\u00f4ng ch\u1ec9 \u0111\u1ecbnh \u1ee7 dung d\u1ecbch\/pickling cho \u1ed1ng h\u00e0n trong m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n.<br \/>\n&#8211; B\u1ecf qua h\u1ec7 s\u1ed1 m\u1ed1i h\u00e0n E trong t\u00ednh to\u00e1n \u2192 gi\u1ea3m an to\u00e0n.<br \/>\n&#8211; Nh\u1ea7m schedule B36.10 (th\u00e9p carbon) v\u1edbi B36.19 (inox) \u2192 sai b\u1ec1 d\u00e0y.<\/p>\n<h2 id=\"toc-11-ket-luan-nen-chon-loai-nao\">K\u1ebft lu\u1eadn: N\u00ean ch\u1ecdn lo\u1ea1i n\u00e0o?<\/h2>\n<p>&#8211; Ch\u1ecdn \u1ed1ng inox h\u00e0n n\u1ebfu:<br \/>\n  &#8211; \u00c1p su\u1ea5t \u2013 nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh, y\u00eau c\u1ea7u b\u1ec1 m\u1eb7t\/OD \u0111\u1eb9p, chi ph\u00ed t\u1ed1i \u01b0u, k\u00edch th\u01b0\u1edbc l\u1edbn, ho\u1eb7c \u1ee9ng d\u1ee5ng sanitary \u0111\u00e3 ki\u1ec3m so\u00e1t m\u1ed1i h\u00e0n. Ch\u1ec9 \u0111\u1ecbnh \u1ee7 dung d\u1ecbch + NDT khi c\u1ea7n E=1.0.<br \/>\n&#8211; Ch\u1ecdn \u1ed1ng inox \u0111\u00fac n\u1ebfu:<br \/>\n  &#8211; D\u1ecbch v\u1ee5 \u00e1p\/nhi\u1ec7t cao, chu tr\u00ecnh xung \u00e1p, y\u00eau c\u1ea7u E=1.0 m\u1eb7c \u0111\u1ecbnh, k\u00edch th\u01b0\u1edbc nh\u1ecf \u2013 trung nh\u01b0ng c\u1ea7n \u0111\u1ed9 tin c\u1eady t\u1ed1i \u0111a (h\u01a1i, n\u1ed3i h\u01a1i, d\u1ea7u kh\u00ed, instrumentation).<br \/>\n&#8211; M\u00e1c th\u00e9p: \u01b0u ti\u00ean 304L\/316L; n\u00e2ng l\u00ean 316L\/duplex cho chloride\/\u0103n m\u00f2n n\u1eb7ng. Lu\u00f4n b\u00e1m m\u00e3 thi\u1ebft k\u1ebf, ti\u00eau chu\u1ea9n v\u1eadt li\u1ec7u v\u00e0 quy \u0111\u1ecbnh QA\/QC ngay t\u1eeb \u0111\u1ea7u.<\/p>\n<p>T\u00f3m l\u1ea1i: \u1ed0ng h\u00e0n mang l\u1ea1i hi\u1ec7u qu\u1ea3 chi ph\u00ed v\u00e0 b\u1ec1 m\u1eb7t cho \u0111a s\u1ed1 \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p \u2013 d\u00e2n d\u1ee5ng khi quy tr\u00ecnh h\u00e0n v\u00e0 x\u1eed l\u00fd sau h\u00e0n \u0111\u1ea1t chu\u1ea9n. \u1ed0ng \u0111\u00fac l\u00e0 l\u1ef1a ch\u1ecdn an to\u00e0n cho \u00e1p l\u1ef1c\/nhi\u1ec7t \u0111\u1ed9\/chu tr\u00ecnh kh\u1eafc nghi\u1ec7t. Quy\u1ebft \u0111\u1ecbnh d\u1ef1a tr\u00ean \u00e1p su\u1ea5t\u2013nhi\u1ec7t \u0111\u1ed9\u2013m\u00f4i ch\u1ea5t\u2013m\u00e3 thi\u1ebft k\u1ebf\u2013ng\u00e2n s\u00e1ch, k\u00e8m ch\u1ec9 \u0111\u1ecbnh QA\/QC r\u00f5 r\u00e0ng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o tu\u1ed5i th\u1ecd v\u00e0 an to\u00e0n h\u1ec7 th\u1ed1ng.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>So s\u00e1nh \u1ed1ng inox h\u00e0n v\u00e0 \u1ed1ng inox \u0111\u00fac v\u1ec1 quy tr\u00ecnh, c\u01a1 t\u00ednh, \u00e1p l\u1ef1c, \u0103n m\u00f2n, ti\u00eau chu\u1ea9n ASTM\/ASME, chi ph\u00ed v\u00e0 \u1ee9ng d\u1ee5ng. H\u01b0\u1edbng d\u1eabn ch\u1ecdn nhanh cho t\u1eebng d\u1ef1 \u00e1n.<\/p>\n","protected":false},"author":7,"featured_media":1057,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-1209","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\/1209","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=1209"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/1209\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1057"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=1209"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=1209"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=1209"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}