{"id":1189,"date":"2025-10-16T00:33:18","date_gmt":"2025-10-15T17:33:18","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/phan-biet-ong-inox-cong-nghiep-va-trang-tri-tieu-chuan-ung-dung\/"},"modified":"2025-10-16T00:33:18","modified_gmt":"2025-10-15T17:33:18","slug":"phan-biet-ong-inox-cong-nghiep-va-trang-tri-tieu-chuan-ung-dung","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/phan-biet-ong-inox-cong-nghiep-va-trang-tri-tieu-chuan-ung-dung\/","title":{"rendered":"Ph\u00e2n bi\u1ec7t \u1ed1ng inox c\u00f4ng nghi\u1ec7p v\u00e0 trang tr\u00ed: ti\u00eau chu\u1ea9n, \u1ee9ng d\u1ee5ng"},"content":{"rendered":"<div class=\"custom-toc\">\n<h3>N\u1ed9i dung ch\u00ednh<\/h3>\n<ul>\n<li><a href=\"#toc-0-dinh-nghia-va-tieu-chuan-ap-dung\">\u0110\u1ecbnh ngh\u0129a v\u00e0 ti\u00eau chu\u1ea9n \u00e1p d\u1ee5ng<\/a><\/li>\n<li><a href=\"#toc-1-so-sanh-nhanh-theo-tieu-chi-ky-thuat-quan-trong\">So s\u00e1nh nhanh theo ti\u00eau ch\u00ed k\u1ef9 thu\u1eadt quan tr\u1ecdng<\/a><\/li>\n<li><a href=\"#toc-2-thong-so-dien-hinh-tai-thi-truong-viet-nam\">Th\u00f4ng s\u1ed1 \u0111i\u1ec3n h\u00ecnh t\u1ea1i th\u1ecb tr\u01b0\u1eddng Vi\u1ec7t Nam<\/a><\/li>\n<li><a href=\"#toc-3-ung-dung-dung-sai-vi-du-thuc-te\">\u1ee8ng d\u1ee5ng \u0111\u00fang \u2013 sai: v\u00ed d\u1ee5 th\u1ef1c t\u1ebf<\/a><\/li>\n<li><a href=\"#toc-4-6-tieu-chi-chon-ong-dung-ngay-tu-dau\">6 ti\u00eau ch\u00ed ch\u1ecdn \u1ed1ng \u0111\u00fang ngay t\u1eeb \u0111\u1ea7u<\/a><\/li>\n<li><a href=\"#toc-5-chi-phi-cach-so-sanh-cho-quyet-dinh-toi-uu\">Chi ph\u00ed: c\u00e1ch so s\u00e1nh cho quy\u1ebft \u0111\u1ecbnh t\u1ed1i \u01b0u<\/a><\/li>\n<li><a href=\"#toc-6-sai-lam-pho-bien-va-cach-tranh\">Sai l\u1ea7m ph\u1ed5 bi\u1ebfn v\u00e0 c\u00e1ch tr\u00e1nh<\/a><\/li>\n<li><a href=\"#toc-7-quy-trinh-kiem-tra-chat-luong-khuyen-nghi-khi-nhan\">Quy tr\u00ecnh ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng khuy\u1ebfn ngh\u1ecb khi nh\u1eadn h\u00e0ng<\/a><\/li>\n<li><a href=\"#toc-8-tinh-huong-chon-mau-case-study-ngan\">T\u00ecnh hu\u1ed1ng ch\u1ecdn m\u1eabu (case study ng\u1eafn)<\/a><\/li>\n<li><a href=\"#toc-9-hoi-nhanh-dap-gon\">H\u1ecfi nhanh \u2013 \u0111\u00e1p g\u1ecdn<\/a><\/li>\n<li><a href=\"#toc-10-khi-nao-nen-lien-he-nha-cung-cap-de-tu-van-ky-hon\">Khi n\u00e0o n\u00ean li\u00ean h\u1ec7 nh\u00e0 cung c\u1ea5p \u0111\u1ec3 t\u01b0 v\u1ea5n k\u1ef9 h\u01a1n<\/a><\/li>\n<li><a href=\"#toc-11-ket-luan\">K\u1ebft lu\u1eadn<\/a><\/li>\n<\/ul>\n<\/div>\n<p>Trong h\u1ec7 s\u1ea3n ph\u1ea9m inox (t\u1ea5m, cu\u1ed9n, \u1ed1ng, h\u1ed9p, thanh \u0111\u1eb7c), \u1ed1ng inox \u0111\u01b0\u1ee3c chia hai nh\u00f3m l\u1edbn: \u1ed1ng c\u00f4ng nghi\u1ec7p v\u00e0 \u1ed1ng trang tr\u00ed. Nh\u1ea7m l\u1eabn gi\u1eefa hai nh\u00f3m n\u00e0y d\u1eabn \u0111\u1ebfn r\u1ee7i ro v\u1ec1 an to\u00e0n \u00e1p l\u1ef1c, v\u1ec7 sinh, chi ph\u00ed v\u00e0 tu\u1ed5i th\u1ecd. B\u00e0i vi\u1ebft n\u00e0y ph\u00e2n bi\u1ec7t chi ti\u1ebft, d\u1ef1a tr\u00ean ti\u00eau chu\u1ea9n, k\u1ebft c\u1ea5u, b\u1ec1 m\u1eb7t, dung sai, ki\u1ec3m \u0111\u1ecbnh, ph\u1ee5 ki\u1ec7n \u0111i k\u00e8m v\u00e0 \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf t\u1ea1i th\u1ecb tr\u01b0\u1eddng Vi\u1ec7t Nam.<\/p>\n<h2 id=\"toc-0-dinh-nghia-va-tieu-chuan-ap-dung\">\u0110\u1ecbnh ngh\u0129a v\u00e0 ti\u00eau chu\u1ea9n \u00e1p d\u1ee5ng<\/h2>\n<h3>\u1ed0ng inox c\u00f4ng nghi\u1ec7p (Industrial stainless steel pipe\/tube)<\/h3>\n<p>&#8211; M\u1ee5c \u0111\u00edch: Truy\u1ec1n d\u1eabn l\u01b0u ch\u1ea5t (n\u01b0\u1edbc, h\u01a1i, h\u00f3a ch\u1ea5t, kh\u00ed), ch\u1ecbu \u00e1p, ch\u1ecbu nhi\u1ec7t, y\u00eau c\u1ea7u v\u1ec7 sinh\/\u0103n m\u00f2n kh\u1eaft khe.<br \/>\n&#8211; Ti\u00eau chu\u1ea9n ph\u1ed5 bi\u1ebfn:<br \/>\n  &#8211; ASTM A312\/A312M: \u1ed0ng h\u00e0n v\u00e0 \u1ed1ng \u0111\u00fac (seamless\/welded) austenitic cho d\u1ecbch v\u1ee5 t\u1ed5ng qu\u00e1t\/\u00e1p l\u1ef1c.<br \/>\n  &#8211; ASTM A269: \u1ed0ng h\u00e0n\/\u0111\u00fac cho trao \u0111\u1ed5i nhi\u1ec7t, d\u1ee5ng c\u1ee5, th\u01b0\u1eddng th\u00e0nh m\u1ecfng nh\u01b0ng ki\u1ec3m \u0111\u1ecbnh nghi\u00eam ng\u1eb7t.<br \/>\n  &#8211; ASTM A270: \u1ed0ng inox v\u1ec7 sinh cho th\u1ef1c ph\u1ea9m\/d\u01b0\u1ee3c ph\u1ea9m, y\u00eau c\u1ea7u \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t trong \u1ed1ng (th\u01b0\u1eddng Ra \u2264 0,8 \u03bcm).<br \/>\n  &#8211; ASME B36.19M: K\u00edch th\u01b0\u1edbc NPS v\u00e0 Schedule (10S\/40S\/80S\u2026).<br \/>\n&#8211; Tr\u1ea1ng th\u00e1i nhi\u1ec7t luy\u1ec7n: Th\u01b0\u1eddng \u1ee7 dung d\u1ecbch (solution annealed), t\u1ea9y axit (pickled &#038; passivated).<br \/>\n&#8211; Ki\u1ec3m \u0111\u1ecbnh: Th\u1eed th\u1ee7y l\u1ef1c\/eddy current, ki\u1ec3m tra th\u00e0nh ph\u1ea7n (PMI), ch\u1ee9ng ch\u1ec9 v\u1eadt li\u1ec7u EN 10204 3.1.<\/p>\n<h3>\u1ed0ng inox trang tr\u00ed (Decorative\/ornamental stainless steel tube)<\/h3>\n<p>&#8211; M\u1ee5c \u0111\u00edch: K\u1ebft c\u1ea5u nh\u1eb9 v\u00e0 trang tr\u00ed: lan can, tay v\u1ecbn, n\u1ed9i th\u1ea5t, m\u1eb7t d\u1ef1ng, bi\u1ec3n b\u1ea3ng. Kh\u00f4ng thi\u1ebft k\u1ebf cho \u00e1p l\u1ef1c.<br \/>\n&#8211; Ti\u00eau chu\u1ea9n ph\u1ed5 bi\u1ebfn:<br \/>\n  &#8211; ASTM A554: \u1ed0ng inox h\u00e0n cho m\u1ee5c \u0111\u00edch c\u01a1 kh\u00ed\/trang tr\u00ed (square, rectangular, round).<br \/>\n  &#8211; JIS G3448: \u1ed0ng inox m\u1ecfng d\u00f9ng cho h\u1ec7 d\u00e2n d\u1ee5ng\/nh\u1eb9 (m\u1ed9t s\u1ed1 nh\u00e0 th\u1ea7u s\u1eed d\u1ee5ng cho ti\u1ec7n \u00edch kh\u00f4ng \u00e1p).<br \/>\n  &#8211; Ti\u00eau chu\u1ea9n nh\u00e0 m\u00e1y cho ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t (HL\/No.4\/8K, PVD).<br \/>\n&#8211; Tr\u1ea1ng th\u00e1i: Th\u01b0\u1eddng c\u00e1n ngu\u1ed9i, h\u00e0n ERW\/TIG\/laser, kh\u00f4ng y\u00eau c\u1ea7u \u1ee7 dung d\u1ecbch b\u1eaft bu\u1ed9c; t\u1eadp trung v\u00e0o th\u1ea9m m\u1ef9 b\u1ec1 m\u1eb7t.<\/p>\n<h2 id=\"toc-1-so-sanh-nhanh-theo-tieu-chi-ky-thuat-quan-trong\">So s\u00e1nh nhanh theo ti\u00eau ch\u00ed k\u1ef9 thu\u1eadt quan tr\u1ecdng<\/h2>\n<p>&#8211; Ch\u1ee9c n\u0103ng:<br \/>\n  &#8211; C\u00f4ng nghi\u1ec7p: Ch\u1ecbu \u00e1p, ch\u1ecbu nhi\u1ec7t, ch\u1ecbu \u0103n m\u00f2n, v\u1ec7 sinh quy tr\u00ecnh.<br \/>\n  &#8211; Trang tr\u00ed: Th\u1ea9m m\u1ef9, tr\u1ecdng l\u01b0\u1ee3ng nh\u1eb9, d\u1ec5 gia c\u00f4ng c\u01a1 kh\u00ed.<br \/>\n&#8211; K\u00edch th\u01b0\u1edbc:<br \/>\n  &#8211; C\u00f4ng nghi\u1ec7p: Theo NPS (inch) v\u00e0 Schedule. V\u00ed d\u1ee5 NPS 1&#8243; OD 33,4 mm; SCH10S\/40S\/80S quy\u1ebft \u0111\u1ecbnh \u0111\u1ed9 d\u00e0y.<br \/>\n  &#8211; Trang tr\u00ed: Theo OD (mm). Ph\u1ed5 bi\u1ebfn 9,5\u2013114,3 mm; \u0111\u1ed9 d\u00e0y 0,5\u20132,0 mm.<br \/>\n&#8211; \u0110\u1ed9 d\u00e0y th\u00e0nh:<br \/>\n  &#8211; C\u00f4ng nghi\u1ec7p: T\u1eeb SCH10S (~2\u20133 mm v\u1edbi c\u1ee1 nh\u1ecf) \u0111\u1ebfn SCH80S (\u0111\u1ebfn >7 mm t\u00f9y NPS).<br \/>\n  &#8211; Trang tr\u00ed: Th\u01b0\u1eddng 0,6\u20131,5 mm (ti\u1ebft ki\u1ec7m kh\u1ed1i l\u01b0\u1ee3ng, kh\u00f4ng ch\u1ecbu \u00e1p).<br \/>\n&#8211; M\u00e1c th\u00e9p:<br \/>\n  &#8211; C\u00f4ng nghi\u1ec7p: 304\/304L, 316\/316L l\u00e0 ch\u1ee7 \u0111\u1ea1o; 321, 310S cho nhi\u1ec7t cao; 2205 duplex cho clorua\/\u00e1p l\u1ef1c cao.<br \/>\n  &#8211; Trang tr\u00ed: 304\/201 ph\u1ed5 bi\u1ebfn; 316 d\u00f9ng cho ngo\u00e0i tr\u1eddi bi\u1ec3n\/c\u00f4ng tr\u00ecnh cao c\u1ea5p.<br \/>\n&#8211; B\u1ec1 m\u1eb7t:<br \/>\n  &#8211; C\u00f4ng nghi\u1ec7p: 2B, No.1 (t\u1ea9y axit m\u1edd), \u00edt nh\u1ea5n m\u1ea1nh b\u1ec1 m\u1eb7t ngo\u00e0i; b\u1ec1 m\u1eb7t trong quan tr\u1ecdng v\u1edbi A270 (Ra).<br \/>\n  &#8211; Trang tr\u00ed: HL (hairline), No.4, SB, BA, g\u01b0\u01a1ng 8K; c\u00f3 th\u1ec3 ph\u1ee7 PVD (v\u00e0ng, \u0111\u1ed3ng, \u0111en titan).<br \/>\n&#8211; Dung sai:<br \/>\n  &#8211; C\u00f4ng nghi\u1ec7p (ASTM A312\/A269): Dung sai OD\/WT nghi\u00eam ng\u1eb7t; ki\u1ec3m so\u00e1t ovality; chi\u1ec1u d\u00e0i ng\u1eabu nhi\u00ean \u0111\u00f4i (5\u20137 m) ho\u1eb7c c\u1eaft theo y\u00eau c\u1ea7u; \u0111\u1ea7u \u1ed1ng v\u00e1t (beveled).<br \/>\n  &#8211; Trang tr\u00ed (ASTM A554): Dung sai OD th\u01b0\u1eddng \u00b10,5% (ho\u1eb7c theo th\u1ecfa thu\u1eadn), WT -10\/+10% \u0111i\u1ec3n h\u00ecnh; \u0111\u1ea7u \u1ed1ng c\u1eaft ph\u1eb3ng; chi\u1ec1u d\u00e0i 6 m.<br \/>\n&#8211; M\u1ed1i h\u00e0n:<br \/>\n  &#8211; C\u00f4ng nghi\u1ec7p: H\u00e0n TIG\/laser ki\u1ec3m so\u00e1t, m\u00e0i ph\u1eb3ng trong\/ngo\u00e0i n\u1ebfu y\u00eau c\u1ea7u v\u1ec7 sinh; \u1ed1ng \u0111\u00fac kh\u00f4ng m\u1ed1i h\u00e0n cho \u00e1p\/nhi\u1ec7t cao.<br \/>\n  &#8211; Trang tr\u00ed: H\u00e0n ERW\/TIG; th\u01b0\u1eddng ch\u1ec9 m\u00e0i ph\u1eb3ng b\u00ean ngo\u00e0i (kh\u00f4ng y\u00eau c\u1ea7u bead n\u1ed9i).<br \/>\n&#8211; Ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng:<br \/>\n  &#8211; C\u00f4ng nghi\u1ec7p: Hydrostatic\/eddy current, PMI, ki\u1ec3m \u0111\u1ed9 nh\u00e1m, ki\u1ec3m li\u00ean t\u1ee5c m\u1ed1i h\u00e0n; ch\u1ee9ng ch\u1ec9 3.1.<br \/>\n  &#8211; Trang tr\u00ed: Ki\u1ec3m k\u00edch th\u01b0\u1edbc, b\u1ec1 m\u1eb7t, \u0111\u1ed9 th\u1eb3ng; ch\u1ee9ng nh\u1eadn theo l\u00f4.<br \/>\n&#8211; Ph\u1ee5 ki\u1ec7n v\u00e0 k\u1ebft n\u1ed1i:<br \/>\n  &#8211; C\u00f4ng nghi\u1ec7p: H\u00e0n \u0111\u1ed1i \u0111\u1ea7u ASME B16.9, ren ASME B1.20.1, clamp v\u1ec7 sinh (Tri\u2011Clamp) theo 3A cho A270; y\u00eau c\u1ea7u back purge khi h\u00e0n.<br \/>\n  &#8211; Trang tr\u00ed: C\u00fat u\u1ed1n m\u1ecfng, co n\u1ed1i c\u01a1 kh\u00ed, ke, ch\u1ee5p, k\u1eb9p k\u00ednh; h\u00e0n \u0111i\u1ec3m\/TIG nh\u1eb9.<br \/>\n&#8211; Gi\u00e1 v\u00e0 logistics:<br \/>\n  &#8211; C\u00f4ng nghi\u1ec7p: Gi\u00e1 theo kg; n\u1eb7ng, c\u01b0\u1edbc v\u1eadn chuy\u1ec3n cao; \u0111\u00f3ng g\u00f3i b\u1ecdc gi\u1ea5y d\u1ea7u, n\u1eafp b\u1ecbt \u0111\u1ea7u.<br \/>\n  &#8211; Trang tr\u00ed: Gi\u00e1 theo c\u00e2y\/m; nh\u1eb9, d\u1ec5 thi c\u00f4ng; b\u1ecdc phim PE ch\u1ed1ng x\u01b0\u1edbc.<\/p>\n<h2 id=\"toc-2-thong-so-dien-hinh-tai-thi-truong-viet-nam\">Th\u00f4ng s\u1ed1 \u0111i\u1ec3n h\u00ecnh t\u1ea1i th\u1ecb tr\u01b0\u1eddng Vi\u1ec7t Nam<\/h2>\n<h3>\u1ed0ng inox c\u00f4ng nghi\u1ec7p<\/h3>\n<p>&#8211; K\u00edch th\u01b0\u1edbc: NPS 1\/2&#8243;\u201324&#8243; (OD 21,3\u2013610 mm); ph\u1ed5 bi\u1ebfn tuy\u1ebfn c\u00f4ng nghi\u1ec7p 1\/2&#8243;\u20138&#8243;.<br \/>\n&#8211; Schedule: 10S, 40S, 80S (theo ASME B36.19M).<br \/>\n&#8211; Chi\u1ec1u d\u00e0i: SRL ~6 m; DRL ~11\u201312 m (theo \u0111\u1eb7t h\u00e0ng).<br \/>\n&#8211; K\u1ebft th\u00fac \u0111\u1ea7u: Beveled (37,5\u00b0) cho h\u00e0n; Plain end cho clamp\/ren.<br \/>\n&#8211; M\u00e1c: TP304\/304L, TP316\/316L; c\u00f3 s\u1eb5n 321\/310S\/duplex theo d\u1ef1 \u00e1n.<br \/>\n&#8211; Ki\u1ec3m \u0111\u1ecbnh: Hydrotest, NDT, MTC 3.1; pickling &#038; passivation.<\/p>\n<h3>\u1ed0ng inox trang tr\u00ed<\/h3>\n<p>&#8211; K\u00edch th\u01b0\u1edbc OD (mm): 9,5 \u2013 12,7 \u2013 19,1 \u2013 25,4 \u2013 31,8 \u2013 38,1 \u2013 50,8 \u2013 63,5 \u2013 76,2 \u2013 101,6 \u2013 114,3.<br \/>\n&#8211; \u0110\u1ed9 d\u00e0y: 0,6 \/ 0,7 \/ 0,8 \/ 1,0 \/ 1,2 \/ 1,5 \/ 2,0 mm (t\u00f9y OD).<br \/>\n&#8211; Chi\u1ec1u d\u00e0i: 6 m\/c\u00e2y; c\u1eaft l\u1ebb theo y\u00eau c\u1ea7u.<br \/>\n&#8211; Ho\u00e0n thi\u1ec7n: HL, No.4, 8K; BA cho n\u1ed9i th\u1ea5t cao c\u1ea5p; PVD (v\u00e0ng\/\u0111en\/v\u00e0ng h\u1ed3ng).<br \/>\n&#8211; M\u00e1c: 201 (n\u1ed9i th\u1ea5t, kh\u00f4), 304 (ngo\u1ea1i th\u1ea5t \u0111\u00f4 th\u1ecb), 316 (ven bi\u1ec3n\/\u0103n m\u00f2n cao).<\/p>\n<h2 id=\"toc-3-ung-dung-dung-sai-vi-du-thuc-te\">\u1ee8ng d\u1ee5ng \u0111\u00fang \u2013 sai: v\u00ed d\u1ee5 th\u1ef1c t\u1ebf<\/h2>\n<p>&#8211; \u0110\u00fang v\u1edbi \u1ed1ng c\u00f4ng nghi\u1ec7p:<br \/>\n  &#8211; \u0110\u01b0\u1eddng \u1ed1ng n\u01b0\u1edbc DI\/RO, CIP th\u1ef1c ph\u1ea9m: A312 TP316L ho\u1eb7c A270 (Ra \u2264 0,8 \u03bcm), h\u00e0n orbital, clamp 3A.<br \/>\n  &#8211; H\u01a1i b\u00e3o h\u00f2a 6\u201312 bar: A312 TP304\/316 SCH40S, ph\u1ee5 ki\u1ec7n h\u00e0n \u0111\u1ed1i \u0111\u1ea7u B16.9.<br \/>\n  &#8211; H\u00f3a ch\u1ea5t nh\u1eb9 pH 2\u201312: TP316L, pickling &#038; passivation sau h\u00e0n, ki\u1ec3m PMI.<br \/>\n&#8211; Sai l\u1ea7m th\u01b0\u1eddng g\u1eb7p:<br \/>\n  &#8211; D\u00f9ng \u1ed1ng trang tr\u00ed A554 (0,8\u20131,0 mm) cho \u0111\u01b0\u1eddng c\u1ea5p n\u01b0\u1edbc \u00e1p l\u1ef1c\/\u1ed1ng m\u00e1y b\u01a1m: nguy c\u01a1 b\u1ee5c, r\u00f2 t\u1ea1i m\u1ed1i h\u00e0n.<br \/>\n  &#8211; D\u00f9ng 201 ngo\u00e0i tr\u1eddi ven bi\u1ec3n: r\u1ec9 n\u00e2u nhanh do clorua; c\u1ea7n 316\/duplex.<br \/>\n&#8211; \u0110\u00fang v\u1edbi \u1ed1ng trang tr\u00ed:<br \/>\n  &#8211; Lan can\/tay v\u1ecbn trung t\u00e2m th\u01b0\u01a1ng m\u1ea1i: 304 HL\/8K, OD 38,1\u201350,8 mm, t=1,0\u20131,5 mm.<br \/>\n  &#8211; N\u1ed9i th\u1ea5t kh\u00f4, chi ph\u00ed th\u1ea5p: 201 HL, OD 25,4\u201338,1 mm, t=0,6\u20130,8 mm.<br \/>\n  &#8211; M\u1eb7t d\u1ef1ng cao c\u1ea5p: 304\/316 BA\/8K + PVD m\u00e0u, y\u00eau c\u1ea7u phim b\u1ea3o v\u1ec7 PE.<\/p>\n<h2 id=\"toc-4-6-tieu-chi-chon-ong-dung-ngay-tu-dau\">6 ti\u00eau ch\u00ed ch\u1ecdn \u1ed1ng \u0111\u00fang ngay t\u1eeb \u0111\u1ea7u<\/h2>\n<p>1) M\u00f4i tr\u01b0\u1eddng l\u00e0m vi\u1ec7c: trong nh\u00e0\/ngo\u00e0i tr\u1eddi\/ven bi\u1ec3n\/ti\u1ebfp x\u00fac clorua\/h\u00f3a ch\u1ea5t.<br \/>\n2) Ch\u1ee9c n\u0103ng: truy\u1ec1n d\u1eabn c\u00f3 \u00e1p\/kh\u00f4ng \u00e1p hay ch\u1ec9 trang tr\u00ed \u2013 n\u1ebfu c\u00f3 \u00e1p\/ch\u1ecbu nhi\u1ec7t \u2192 \u1ed1ng c\u00f4ng nghi\u1ec7p.<br \/>\n3) Ti\u00eau chu\u1ea9n b\u1eaft bu\u1ed9c: ASTM A312\/A269\/A270 (c\u00f4ng nghi\u1ec7p) hay A554 (trang tr\u00ed).<br \/>\n4) K\u00edch th\u01b0\u1edbc v\u00e0 \u0111\u1ed9 d\u00e0y: NPS + Schedule (c\u00f4ng nghi\u1ec7p) vs OD + WT (trang tr\u00ed).<br \/>\n5) Y\u00eau c\u1ea7u b\u1ec1 m\u1eb7t: th\u1ea9m m\u1ef9 (HL\/8K\/PVD) vs v\u1ec7 sinh b\u00ean trong (Ra) v\u00e0 pickling.<br \/>\n6) Ng\u00e2n s\u00e1ch &#038; v\u00f2ng \u0111\u1eddi: c\u00e2n \u0111\u1ed1i 201\/304\/316; chi ph\u00ed thay th\u1ebf do \u0103n m\u00f2n th\u01b0\u1eddng cao h\u01a1n ti\u1ebft ki\u1ec7m ban \u0111\u1ea7u.<\/p>\n<h2 id=\"toc-5-chi-phi-cach-so-sanh-cho-quyet-dinh-toi-uu\">Chi ph\u00ed: c\u00e1ch so s\u00e1nh cho quy\u1ebft \u0111\u1ecbnh t\u1ed1i \u01b0u<\/h2>\n<p>&#8211; \u1ed0ng c\u00f4ng nghi\u1ec7p: t\u00ednh theo kg. T\u0103ng Schedule l\u00e0m t\u0103ng kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 chi ph\u00ed v\u1eadn h\u00e0nh l\u1eafp \u0111\u1eb7t; b\u00f9 l\u1ea1i tu\u1ed5i th\u1ecd v\u00e0 an to\u00e0n.<br \/>\n&#8211; \u1ed0ng trang tr\u00ed: th\u01b0\u1eddng b\u00e1o gi\u00e1 theo c\u00e2y\/m. B\u1ec1 m\u1eb7t cao c\u1ea5p (8K, PVD) t\u0103ng gi\u00e1 nh\u01b0ng kh\u00f4ng t\u0103ng ch\u1ecbu \u00e1p.<br \/>\n&#8211; Quy t\u1eafc th\u1ef1c t\u1ebf:<br \/>\n  &#8211; N\u1ebfu c\u00f3 \u00e1p l\u1ef1c\/\u0103n m\u00f2n\/ti\u1ec7t tr\u00f9ng \u2192 chi ph\u00ed v\u00f2ng \u0111\u1eddi th\u1ea5p nh\u1ea5t l\u00e0 ch\u1ecdn \u0111\u00fang ti\u00eau chu\u1ea9n c\u00f4ng nghi\u1ec7p ngay t\u1eeb \u0111\u1ea7u.<br \/>\n  &#8211; N\u1ebfu ch\u1ec9 th\u1ea9m m\u1ef9 trong nh\u00e0 \u2192 201\/304 trang tr\u00ed \u0111\u1ee7, t\u1ed1i \u01b0u chi ph\u00ed.<\/p>\n<h2 id=\"toc-6-sai-lam-pho-bien-va-cach-tranh\">Sai l\u1ea7m ph\u1ed5 bi\u1ebfn v\u00e0 c\u00e1ch tr\u00e1nh<\/h2>\n<p>&#8211; Nh\u1ea7m \u201cBA\u201d v\u1edbi \u201cg\u01b0\u01a1ng 8K\u201d: BA l\u00e0 b\u1ec1 m\u1eb7t t\u1eeb \u1ee7 s\u00e1ng; 8K l\u00e0 \u0111\u00e1nh b\u00f3ng c\u01a1 \u0111\u1ebfn g\u01b0\u01a1ng \u2013 ch\u1ecdn sai l\u00e0m l\u1ec7ch k\u1ef3 v\u1ecdng th\u1ea9m m\u1ef9.<br \/>\n&#8211; B\u1ecf qua passivation sau h\u00e0n c\u00f4ng nghi\u1ec7p: t\u1ea1o v\u00f9ng nh\u1ea1y \u0103n m\u00f2n (heat tint) \u2192 r\u1ec9 c\u1ee5c b\u1ed9.<br \/>\n&#8211; Kh\u00f4ng back purge khi h\u00e0n \u0111\u01b0\u1eddng \u1ed1ng v\u1ec7 sinh: x\u1ec9 h\u00e0n trong \u1ed1ng \u2192 t\u0103ng \u0111\u1ed9 nh\u00e1m, t\u00edch t\u1ee5 vi sinh.<br \/>\n&#8211; D\u00f9ng ph\u1ee5 ki\u1ec7n trang tr\u00ed cho \u0111\u01b0\u1eddng \u1ed1ng \u00e1p l\u1ef1c: n\u1ee9t t\u1ea1i co n\u1ed1i.<br \/>\n&#8211; Ch\u1ecdn 201 cho khu v\u1ef1c b\u1ec3 b\u01a1i\/ven bi\u1ec3n: pitting nhanh.<br \/>\n&#8211; Kh\u00f4ng ki\u1ec3m PMI khi mua l\u00f4 h\u1ed7n h\u1ee3p: nguy c\u01a1 tr\u1ed9n m\u00e1c 201\/304.<\/p>\n<h2 id=\"toc-7-quy-trinh-kiem-tra-chat-luong-khuyen-nghi-khi-nhan\">Quy tr\u00ecnh ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng khuy\u1ebfn ngh\u1ecb khi nh\u1eadn h\u00e0ng<\/h2>\n<p>&#8211; Ki\u1ec3m t\u00e0i li\u1ec7u: MTC 3.1 (m\u00e1c, nhi\u1ec7t luy\u1ec7n, c\u01a1 t\u00ednh, th\u00e0nh ph\u1ea7n), ch\u1ee9ng nh\u1eadn ti\u00eau chu\u1ea9n.<br \/>\n&#8211; \u0110\u1ed1i chi\u1ebfu d\u1ea5u \u1ed1ng: heat number, ti\u00eau chu\u1ea9n, m\u00e1c, k\u00edch th\u01b0\u1edbc.<br \/>\n&#8211; \u0110o k\u00edch th\u01b0\u1edbc: OD, WT, \u0111\u1ed9 th\u1eb3ng, ovality (\u0111\u1eb7c bi\u1ec7t v\u1edbi A312).<br \/>\n&#8211; Ki\u1ec3m b\u1ec1 m\u1eb7t: x\u01b0\u1edbc, r\u1ed7, \u0111\u00e1nh b\u00f3ng \u0111\u1ed3ng \u0111\u1ec1u; l\u1edbp phim b\u1ea3o v\u1ec7 cho \u1ed1ng trang tr\u00ed.<br \/>\n&#8211; Th\u1eed nhanh: PMI b\u1eb1ng XRF; ki\u1ec3m m\u1ed1i h\u00e0n (borescope cho A270 n\u1ebfu c\u00f3).<br \/>\n&#8211; Bao g\u00f3i: n\u1eafp b\u1ecbt \u0111\u1ea7u cho \u1ed1ng c\u00f4ng nghi\u1ec7p; b\u1ecdc PE cho \u1ed1ng trang tr\u00ed.<\/p>\n<h2 id=\"toc-8-tinh-huong-chon-mau-case-study-ngan\">T\u00ecnh hu\u1ed1ng ch\u1ecdn m\u1eabu (case study ng\u1eafn)<\/h2>\n<p>&#8211; Nh\u00e0 m\u00e1y s\u1eefa: CIP 70\u201385\u00b0C, NaOH 2% \u2192 \u1ed1ng A270 TP316L, Ra \u2264 0,8 \u03bcm, clamp 3A; kh\u00f4ng d\u00f9ng A554.<br \/>\n&#8211; H\u1ec7 lan can b\u1ec7nh vi\u1ec7n: y\u00eau c\u1ea7u v\u1ec7 sinh, kh\u1eed tr\u00f9ng, \u00edt \u0103n m\u00f2n \u2192 304 trang tr\u00ed HL t=1,2 mm; m\u1ed1i h\u00e0n TIG m\u00e0i ph\u1eb3ng.<br \/>\n&#8211; \u0110\u01b0\u1eddng c\u1ea5p n\u01b0\u1edbc RO cho ph\u00f2ng s\u1ea1ch: A312 TP316L SCH10S, h\u00e0n orbital, back purge; passivation to\u00e0n tuy\u1ebfn.<\/p>\n<h2 id=\"toc-9-hoi-nhanh-dap-gon\">H\u1ecfi nhanh \u2013 \u0111\u00e1p g\u1ecdn<\/h2>\n<p>&#8211; \u1ed0ng trang tr\u00ed c\u00f3 d\u00f9ng cho n\u01b0\u1edbc \u00e1p l\u1ef1c th\u1ea5p kh\u00f4ng?<br \/>\n  Kh\u00f4ng khuy\u1ebfn ngh\u1ecb. N\u1ebfu bu\u1ed9c d\u00f9ng cho h\u1ec7 kh\u00f4ng \u00e1p\/\u00e1p r\u1ea5t th\u1ea5p (trang tr\u00ed c\u00f3 n\u01b0\u1edbc), c\u1ea7n x\u00e1c nh\u1eadn \u0111\u1ed9 d\u00e0y, th\u1eed \u00e1p, nh\u01b0ng v\u1eabn r\u1ee7i ro m\u1ed1i h\u00e0n.<br \/>\n&#8211; 201 c\u00f3 r\u1ec9 kh\u00f4ng?<br \/>\n  C\u00f3 th\u1ec3 r\u1ec9 trong m\u00f4i tr\u01b0\u1eddng \u1ea9m\/ion clorua. D\u00f9ng 304 trong \u0111\u00f4 th\u1ecb ngo\u00e0i tr\u1eddi, 316 cho ven bi\u1ec3n\/h\u00f3a ch\u1ea5t.<br \/>\n&#8211; Khi n\u00e0o c\u1ea7n \u1ed1ng \u0111\u00fac (seamless)?<br \/>\n  \u00c1p l\u1ef1c\/nhi\u1ec7t cao, u\u1ed1n cong nhi\u1ec1u, ho\u1eb7c quy \u0111\u1ecbnh d\u1ef1 \u00e1n\/kh\u00f4ng ch\u1ea5p nh\u1eadn m\u1ed1i h\u00e0n b\u00ean trong.<br \/>\n&#8211; B\u00f3ng g\u01b0\u01a1ng 8K c\u00f3 \u1ea3nh h\u01b0\u1edfng ch\u1ed1ng \u0103n m\u00f2n?<br \/>\n  Ch\u1ee7 y\u1ebfu l\u00e0 th\u1ea9m m\u1ef9; ch\u1ed1ng \u0103n m\u00f2n ph\u1ee5 thu\u1ed9c m\u00e1c th\u00e9p v\u00e0 passivation, kh\u00f4ng ph\u1ea3i \u0111\u1ed9 b\u00f3ng ngo\u00e0i.<\/p>\n<h2 id=\"toc-10-khi-nao-nen-lien-he-nha-cung-cap-de-tu-van-ky-hon\">Khi n\u00e0o n\u00ean li\u00ean h\u1ec7 nh\u00e0 cung c\u1ea5p \u0111\u1ec3 t\u01b0 v\u1ea5n k\u1ef9 h\u01a1n<\/h2>\n<p>&#8211; D\u1ef1 \u00e1n c\u00f3 \u00e1p >6 bar, nhi\u1ec7t >80\u00b0C, h\u00f3a ch\u1ea5t \u0103n m\u00f2n, y\u00eau c\u1ea7u v\u1ec7 sinh (A270\/3A), ho\u1eb7c l\u1eafp \u0111\u1eb7t ngo\u00e0i tr\u1eddi ven bi\u1ec3n.<br \/>\n&#8211; C\u1ea7n \u0111\u1ed3ng b\u1ed9 \u1ed1ng \u2013 ph\u1ee5 ki\u1ec7n theo ti\u00eau chu\u1ea9n (ASME B16.9, clamp, ren).<br \/>\n&#8211; C\u1ea7n ch\u1ee9ng ch\u1ec9 MTC 3.1, h\u1ed3 s\u01a1 xu\u1ea5t x\u1ee9, v\u00e0 ki\u1ec3m \u0111\u1ecbnh t\u1ea1i ch\u1ed7 (PMI, hydrotest).<\/p>\n<h2 id=\"toc-11-ket-luan\">K\u1ebft lu\u1eadn<\/h2>\n<p>\u1ed0ng inox c\u00f4ng nghi\u1ec7p v\u00e0 \u1ed1ng inox trang tr\u00ed kh\u00e1c nhau t\u1eeb ti\u00eau chu\u1ea9n, \u0111\u1ed9 d\u00e0y, m\u00e1c th\u00e9p, b\u1ec1 m\u1eb7t, dung sai \u0111\u1ebfn ki\u1ec3m \u0111\u1ecbnh v\u00e0 ph\u1ee5 ki\u1ec7n. Quy t\u1eafc v\u00e0ng: c\u00f3 \u00e1p l\u1ef1c\/\u0103n m\u00f2n\/v\u1ec7 sinh quy tr\u00ecnh \u2192 ch\u1ecdn \u1ed1ng c\u00f4ng nghi\u1ec7p theo ASTM A312\/A269\/A270 v\u00e0 ph\u1ee5 ki\u1ec7n t\u01b0\u01a1ng th\u00edch; ch\u1ec9 y\u00eau c\u1ea7u th\u1ea9m m\u1ef9\/k\u1ebft c\u1ea5u nh\u1eb9 \u2192 ch\u1ecdn \u1ed1ng trang tr\u00ed ASTM A554 v\u1edbi ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t ph\u00f9 h\u1ee3p. Ch\u1ecdn \u0111\u00fang ngay t\u1eeb \u0111\u1ea7u gi\u00fap t\u1ed1i \u01b0u an to\u00e0n, chi ph\u00ed v\u00f2ng \u0111\u1eddi v\u00e0 ti\u1ebfn \u0111\u1ed9 thi c\u00f4ng. N\u1ebfu c\u00f2n do d\u1ef1 gi\u1eefa hai l\u1ef1a ch\u1ecdn, \u01b0u ti\u00ean theo r\u1ee7i ro v\u1eadn h\u00e0nh: an to\u00e0n v\u00e0 \u0111\u1ed9 b\u1ec1n lu\u00f4n quan tr\u1ecdng h\u01a1n chi ph\u00ed ban \u0111\u1ea7u.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>So s\u00e1nh \u1ed1ng inox c\u00f4ng nghi\u1ec7p v\u00e0 \u1ed1ng trang tr\u00ed theo ti\u00eau chu\u1ea9n, \u0111\u1ed9 d\u00e0y, b\u1ec1 m\u1eb7t, dung sai, ki\u1ec3m \u0111\u1ecbnh v\u00e0 \u1ee9ng d\u1ee5ng. H\u01b0\u1edbng d\u1eabn ch\u1ecdn \u0111\u00fang cho t\u1eebng d\u1ef1 \u00e1n.<\/p>\n","protected":false},"author":7,"featured_media":1073,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-1189","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\/1189","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=1189"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/1189\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1073"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=1189"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=1189"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=1189"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}