{"id":1615,"date":"2026-01-30T12:34:16","date_gmt":"2026-01-30T05:34:16","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/bang-cau-hoi-5-buoc-xac-dinh-chinh-xac-loai-inox-can-dung\/"},"modified":"2026-01-30T12:34:16","modified_gmt":"2026-01-30T05:34:16","slug":"bang-cau-hoi-5-buoc-xac-dinh-chinh-xac-loai-inox-can-dung","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/bang-cau-hoi-5-buoc-xac-dinh-chinh-xac-loai-inox-can-dung\/","title":{"rendered":"B\u1ea3ng c\u00e2u h\u1ecfi 5 b\u01b0\u1edbc x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c lo\u1ea1i Inox c\u1ea7n d\u00f9ng"},"content":{"rendered":"<div class=\"custom-toc\">\n<h3>N\u1ed9i dung ch\u00ednh<\/h3>\n<ul>\n<li><a href=\"#toc-0-cach-su-dung-bang-cau-hoi-5-buoc\">C\u00e1ch s\u1eed d\u1ee5ng \u201cb\u1ea3ng c\u00e2u h\u1ecfi 5 b\u01b0\u1edbc\u201d<\/a><\/li>\n<li><a href=\"#toc-1-buoc-1-moi-truong-lam-viec-quyet-dinh-mac-inox\">B\u01b0\u1edbc 1 \u2014 M\u00f4i tr\u01b0\u1eddng l\u00e0m vi\u1ec7c quy\u1ebft \u0111\u1ecbnh m\u00e1c Inox<\/a><\/li>\n<li><a href=\"#toc-2-buoc-2-yeu-cau-co-hoc-va-gia-cong\">B\u01b0\u1edbc 2 \u2014 Y\u00eau c\u1ea7u c\u01a1 h\u1ecdc v\u00e0 gia c\u00f4ng<\/a><\/li>\n<li><a href=\"#toc-3-buoc-3-quy-cach-be-mat-va-tieu-chuan\">B\u01b0\u1edbc 3 \u2014 Quy c\u00e1ch, b\u1ec1 m\u1eb7t v\u00e0 ti\u00eau chu\u1ea9n<\/a><\/li>\n<li><a href=\"#toc-4-buoc-4-ngan-sach-va-tong-chi-phi-so-huu-tco\">B\u01b0\u1edbc 4 \u2014 Ng\u00e2n s\u00e1ch v\u00e0 t\u1ed5ng chi ph\u00ed s\u1edf h\u1eefu (TCO)<\/a><\/li>\n<li><a href=\"#toc-5-buoc-5-tieu-chuan-chung-chi-va-hau-kiem\">B\u01b0\u1edbc 5 \u2014 Ti\u00eau chu\u1ea9n, ch\u1ee9ng ch\u1ec9 v\u00e0 h\u1eadu ki\u1ec3m<\/a><\/li>\n<li><a href=\"#toc-6-bang-cau-hoi-chi-tiet-5-buoc-checklist-ap-dung-nha\">B\u1ea3ng c\u00e2u h\u1ecfi chi ti\u1ebft 5 b\u01b0\u1edbc (Checklist \u00e1p d\u1ee5ng nhanh)<\/a><\/li>\n<li><a href=\"#toc-7-vi-du-thuc-te-tai-viet-nam\">V\u00ed d\u1ee5 th\u1ef1c t\u1ebf t\u1ea1i Vi\u1ec7t Nam<\/a><\/li>\n<li><a href=\"#toc-8-so-sanh-nhanh-cac-mac-pho-bien\">So s\u00e1nh nhanh c\u00e1c m\u00e1c ph\u1ed5 bi\u1ebfn<\/a><\/li>\n<li><a href=\"#toc-9-sai-lam-thuong-gap-can-tranh\">Sai l\u1ea7m th\u01b0\u1eddng g\u1eb7p c\u1ea7n tr\u00e1nh<\/a><\/li>\n<li><a href=\"#toc-10-nguon-tham-khao\">Ngu\u1ed3n 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>Ch\u1ecdn sai lo\u1ea1i Inox d\u1eabn t\u1edbi han g\u1ec9 s\u1edbm, n\u1ee9t m\u00f2n, chi ph\u00ed b\u1ea3o tr\u00ec t\u0103ng v\u00e0 r\u1ee7i ro an to\u00e0n. B\u1ea3ng c\u00e2u h\u1ecfi 5 b\u01b0\u1edbc d\u01b0\u1edbi \u0111\u00e2y gi\u00fap b\u1ea1n x\u00e1c \u0111\u1ecbnh \u0111\u00fang m\u00e1c, quy c\u00e1ch v\u00e0 ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t Inox theo m\u00f4i tr\u01b0\u1eddng, m\u1ee5c \u0111\u00edch v\u00e0 ng\u00e2n s\u00e1ch \u2013 m\u1ed9t ph\u1ea7n thi\u1ebft y\u1ebfu trong m\u1ecdi h\u01b0\u1edbng d\u1eabn ch\u1ecdn Inox chuy\u00ean nghi\u1ec7p.<\/p>\n<h2 id=\"toc-0-cach-su-dung-bang-cau-hoi-5-buoc\">C\u00e1ch s\u1eed d\u1ee5ng \u201cb\u1ea3ng c\u00e2u h\u1ecfi 5 b\u01b0\u1edbc\u201d<\/h2>\n<p>&#8211; Tr\u1ea3 l\u1eddi l\u1ea7n l\u01b0\u1ee3t t\u1eebng b\u01b0\u1edbc t\u1eeb B\u01b0\u1edbc 1 \u0111\u1ebfn B\u01b0\u1edbc 5.<br \/>\n&#8211; \u1ede m\u1ed7i b\u01b0\u1edbc, ch\u1ecdn ph\u01b0\u01a1ng \u00e1n g\u1ea7n nh\u1ea5t v\u1edbi \u0111i\u1ec1u ki\u1ec7n c\u1ee7a b\u1ea1n.<br \/>\n&#8211; K\u1ebft qu\u1ea3 l\u00e0 m\u1ed9t khuy\u1ebfn ngh\u1ecb m\u00e1c (v\u00ed d\u1ee5: 201, 304\/304L, 316\/316L, 430, 310S, 2205 duplex), k\u00e8m chi\u1ec1u d\u00e0y, b\u1ec1 m\u1eb7t v\u00e0 ti\u00eau chu\u1ea9n \u00e1p d\u1ee5ng.<\/p>\n<h2 id=\"toc-1-buoc-1-moi-truong-lam-viec-quyet-dinh-mac-inox\">B\u01b0\u1edbc 1 \u2014 M\u00f4i tr\u01b0\u1eddng l\u00e0m vi\u1ec7c quy\u1ebft \u0111\u1ecbnh m\u00e1c Inox<\/h2>\n<p>H\u00e3y tr\u1ea3 l\u1eddi c\u00e1c c\u00e2u h\u1ecfi then ch\u1ed1t:<br \/>\n&#8211; C\u00f3 clo\/chloride (n\u01b0\u1edbc bi\u1ec3n, s\u01b0\u01a1ng mu\u1ed1i, h\u00f3a ch\u1ea5t t\u1ea9y r\u1eeda ch\u1ee9a Cl\u2212)? M\u1ee9c \u01b0\u1edbc l\u01b0\u1ee3ng: n\u01b0\u1edbc m\u00e1y n\u1ed9i \u0111\u1ecba th\u01b0\u1eddng <100 ppm; ven bi\u1ec3n c\u00f3 th\u1ec3 >500 ppm; phun s\u01b0\u01a1ng n\u01b0\u1edbc m\u1eb7n c\u00f3 th\u1ec3 >1000 ppm.<br \/>\n&#8211; Trong nh\u00e0 hay ngo\u00e0i tr\u1eddi? Ngo\u00e0i tr\u1eddi c\u00f3 m\u01b0a axit\/b\u1ee5i c\u00f4ng nghi\u1ec7p?<br \/>\n&#8211; Nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh (\u00e2m, th\u01b0\u1eddng, cao >300\u00b0C, r\u1ea5t cao >800\u00b0C)?<br \/>\n&#8211; C\u00f3 ti\u1ebfp x\u00fac th\u1ef1c ph\u1ea9m\/d\u01b0\u1ee3c\/c\u1ea5p n\u01b0\u1edbc sinh ho\u1ea1t?<br \/>\n&#8211; \u0110\u1ed9 pH, h\u00f3a ch\u1ea5t: axit m\u1ea1nh\/ki\u1ec1m m\u1ea1nh, sulfur, halogen?<\/p>\n<p>G\u1ee3i \u00fd ch\u1ecdn m\u00e1c theo m\u00f4i tr\u01b0\u1eddng:<br \/>\n&#8211; \u00cdt chloride, trong nh\u00e0 kh\u00f4 r\u00e1o, trang tr\u00ed: 430 (ferritic, 16\u201318%Cr) ho\u1eb7c 201 (austenitic Mn\u2013N, Ni th\u1ea5p). L\u01b0u \u00fd 201\/430 k\u00e9m ch\u1ed1ng r\u1ed7 h\u01a1n 304.<br \/>\n&#8211; Ngo\u00e0i tr\u1eddi \u0111\u00f4 th\u1ecb n\u1ed9i \u0111\u1ecba, \u1ea9m \u01b0\u1edbt, v\u1ec7 sinh \u0111\u1ecbnh k\u1ef3: 304\/304L (18%Cr\u20138%Ni) l\u00e0 \u201cchu\u1ea9n v\u00e0ng\u201d \u0111a d\u1ee5ng; gi\u1ea3m nguy c\u01a1 \u201c\u1ed1 tr\u00e0\u201d so v\u1edbi 201\/430.<br \/>\n&#8211; Ven bi\u1ec3n, h\u01a1i mu\u1ed1i, h\u00f3a ch\u1ea5t c\u00f3 chloride, F&#038;B\/thu\u1ed1c c\u00f3 y\u00eau c\u1ea7u v\u1ec7 sinh: 316\/316L (th\u00eam 2\u20132.5% Mo) t\u0103ng ch\u1ed1ng r\u1ed7\/clo r\u00f5 r\u1ec7t.<br \/>\n&#8211; Nhi\u1ec7t \u0111\u1ed9 cao 800\u20131100\u00b0C: 310S (25%Cr\u201320%Ni) ho\u1eb7c 309S cho ch\u1ecbu nhi\u1ec7t, ch\u1ed1ng oxy h\u00f3a.<br \/>\n&#8211; M\u00f4i tr\u01b0\u1eddng mu\u1ed1i \u0111\u1eadm \u0111\u1eb7c, n\u01b0\u1edbc bi\u1ec3n tu\u1ea7n ho\u00e0n, k\u1ebft c\u1ea5u ch\u1ecbu t\u1ea3i ngo\u00e0i kh\u01a1i: Duplex 2205 (22%Cr\u20133%Mo\u2013N) ch\u1ed1ng r\u1ed7\/n\u1ee9t do chloride v\u01b0\u1ee3t tr\u1ed9i.<br \/>\n&#8211; M\u00e0i m\u00f2n\/c\u1ea7n c\u1ee9ng b\u1ec1 m\u1eb7t, kh\u00f4ng \u01b0u ti\u00ean ch\u1ed1ng g\u1ec9: 410\/420 (martensitic) c\u00f3 th\u1ec3 ph\u00f9 h\u1ee3p, nh\u01b0ng ch\u1ed1ng \u0103n m\u00f2n th\u1ea5p h\u01a1n 304.<\/p>\n<p>L\u00fd do k\u1ef9 thu\u1eadt:<br \/>\n&#8211; Kh\u1ea3 n\u0103ng ch\u1ed1ng r\u1ed7 li\u00ean quan \u0111\u1ebfn PREN \u2248 %Cr + 3.3\u00d7%Mo + 16\u00d7%N. 304 c\u00f3 PREN ~18\u201320; 316 ~24\u201326; 2205 ~35+. PREN c\u00e0ng cao, ch\u1ed1ng r\u1ed7 chloride c\u00e0ng t\u1ed1t.<br \/>\n&#8211; T\u00e0i li\u1ec7u Nickel Institute khuy\u1ebfn ngh\u1ecb 304 cho n\u01b0\u1edbc c\u00f3 chloride th\u1ea5p, 316\/duplex cho chloride cao ho\u1eb7c phun s\u01b0\u01a1ng mu\u1ed1i; t\u0103ng v\u1ec7 sinh v\u00e0 ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t \u0111\u1ec3 gi\u1ea3m \u201ctea staining\u201d.<\/p>\n<p>Ngu\u1ed3n tham kh\u1ea3o: Nickel Institute \u2013 \u201cStainless Steels in Water\u201d (Pub. 11 024); Outokumpu Stainless Steel Handbook; EN 10088\/ISO 15510.<\/p>\n<h3>Ng\u01b0\u1ee1ng g\u1ee3i \u00fd nhanh theo chloride (\u1edf nhi\u1ec7t \u0111\u1ed9 th\u01b0\u1eddng)<\/h3>\n<p>&#8211; <200 ppm: 304\/304L th\u01b0\u1eddng \u0111\u1ee7, b\u1ea3o tr\u00ec \u0111\u1ecbnh k\u1ef3.  \n- 200\u20131000 ppm ho\u1eb7c phun s\u01b0\u01a1ng mu\u1ed1i: 316\/316L; \u01b0u ti\u00ean b\u1ec1 m\u1eb7t m\u1ecbn (BA\/No.4 m\u1ecbn) v\u00e0 v\u1ec7 sinh th\u01b0\u1eddng xuy\u00ean.  \n- >1000 ppm ho\u1eb7c h\u1edf ngo\u00e0i kh\u01a1i\/\u0111\u1ecdng mu\u1ed1i: Duplex 2205 ho\u1eb7c v\u1eadt li\u1ec7u chuy\u00ean d\u1ee5ng; thi\u1ebft k\u1ebf tr\u00e1nh \u0111\u1ecdng n\u01b0\u1edbc.<\/p>\n<h2 id=\"toc-2-buoc-2-yeu-cau-co-hoc-va-gia-cong\">B\u01b0\u1edbc 2 \u2014 Y\u00eau c\u1ea7u c\u01a1 h\u1ecdc v\u00e0 gia c\u00f4ng<\/h2>\n<p>Tr\u1ea3 l\u1eddi:<br \/>\n&#8211; Chi ti\u1ebft ch\u1ecbu l\u1ef1c hay ch\u1ec9 trang tr\u00ed? \u0110\u1ed9 c\u1ee9ng, \u0111\u1ed9 b\u1ec1n ch\u1ea3y (yield), \u0111\u1ed9 b\u1ec1n k\u00e9o c\u1ea7n bao nhi\u00eau?<br \/>\n&#8211; C\u00f3 h\u00e0n nhi\u1ec1u, u\u1ed1n s\u00e2u, k\u00e9o d\u1eadp s\u00e2u, hay gia c\u00f4ng c\u1eaft g\u1ecdt?<br \/>\n&#8211; Nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn b\u1ec1n c\u01a1 h\u1ecdc?<\/p>\n<p>G\u1ee3i \u00fd ch\u1ecdn theo c\u01a1 h\u1ecdc\/gia c\u00f4ng:<br \/>\n&#8211; K\u1ebft c\u1ea5u h\u00e0n nhi\u1ec1u, nguy c\u01a1 \u0103n m\u00f2n k\u1ebd h\u00e0n: d\u00f9ng \u201cL\u201d (304L\/316L) v\u1edbi C th\u1ea5p \u0111\u1ec3 ch\u1ed1ng \u0103n m\u00f2n k\u1ebd h\u00e0n; ti\u00eau chu\u1ea9n t\u1ea5m\/coil: ASTM A240.<br \/>\n&#8211; C\u1ea7n b\u1ec1n k\u00e9o cao, ti\u1ebft gi\u1ea3m chi\u1ec1u d\u00e0y: 201 c\u00e1n ngu\u1ed9i c\u00f3 yield cao h\u01a1n 304, nh\u01b0ng xem x\u00e9t ch\u1ed1ng g\u1ec9; duplex 2205 c\u00f3 yield ~450\u2013550 MPa, cao h\u01a1n 304\/316 (~170\u2013300 MPa).<br \/>\n&#8211; Nhi\u1ec7t cao: 310S, 309S; tr\u00e1nh 304\/316 tr\u00ean 425\u2013870\u00b0C k\u00e9o d\u00e0i do nguy c\u01a1 nh\u1ea1y c\u1ea3m (sensitization) n\u1ebfu kh\u00f4ng x\u1eed l\u00fd th\u00edch h\u1ee3p.<br \/>\n&#8211; C\u1ea7n gia c\u00f4ng d\u1eadp s\u00e2u: 304\/304DDQ d\u1ec5 d\u1eadp; 430 k\u00e9m d\u1ebbo h\u01a1n; 201 c\u00f3 th\u1ec3 n\u1ee9t n\u1ebfu d\u1eadp s\u00e2u kh\u00f4ng t\u1ed1i \u01b0u.<br \/>\n&#8211; C\u1ea7n m\u00e0i, \u0111\u00e1nh b\u00f3ng g\u01b0\u01a1ng: 304\/316 cho b\u1ec1 m\u1eb7t 8K\/mirror \u1ed5n \u0111\u1ecbnh; 430 \u0111\u00e1nh b\u00f3ng \u0111\u01b0\u1ee3c nh\u01b0ng d\u1ec5 x\u01b0\u1edbc\/\u1ed1 h\u01a1n ngo\u00e0i tr\u1eddi.<\/p>\n<h2 id=\"toc-3-buoc-3-quy-cach-be-mat-va-tieu-chuan\">B\u01b0\u1edbc 3 \u2014 Quy c\u00e1ch, b\u1ec1 m\u1eb7t v\u00e0 ti\u00eau chu\u1ea9n<\/h2>\n<p>H\u1ecfi:<br \/>\n&#8211; D\u1ea1ng s\u1ea3n ph\u1ea9m? (t\u1ea5m\/coil, \u1ed1ng h\u00e0n ASTM A554\/A312, h\u1ed9p, thanh \u0111\u1eb7c ASTM A276, ph\u1ee5 ki\u1ec7n ASTM A403, l\u01b0\u1edbi, la).<br \/>\n&#8211; Chi\u1ec1u d\u00e0y\/\u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng? \u1ed0ng \u00e1p l\u1ef1c tham chi\u1ebfu SCH10\/SCH40.<br \/>\n&#8211; Y\u00eau c\u1ea7u th\u1ea9m m\u1ef9\/hygienic: Ra, b\u00f3ng g\u01b0\u01a1ng, hairline, ch\u1ed1ng b\u00e1m b\u1ea9n?<\/p>\n<p>G\u1ee3i \u00fd c\u1ea5u h\u00ecnh:<br \/>\n&#8211; T\u1ea5m: ASTM A240; b\u1ec1 m\u1eb7t 2B (ph\u1ed5 th\u00f4ng), BA (b\u00f3ng), No.4\/HL (x\u01b0\u1edbc), No.8\/8K (g\u01b0\u01a1ng). F&#038;B \u01b0u ti\u00ean 2B\/BA d\u1ec5 l\u00e0m s\u1ea1ch.<br \/>\n&#8211; \u1ed0ng trang tr\u00ed: ASTM A554; \u1ed1ng c\u00f4ng nghi\u1ec7p\/\u00e1p l\u1ef1c: ASTM A312.<br \/>\n&#8211; Ra c\u00e0ng th\u1ea5p c\u00e0ng d\u1ec5 v\u1ec7 sinh v\u00e0 ch\u1ed1ng \u1ed1: ch\u1ecdn BA\/\u0111\u00e1nh b\u00f3ng m\u1ecbn cho m\u00f4i tr\u01b0\u1eddng bi\u1ec3n\/\u0111\u00f4 th\u1ecb n\u1ebfu y\u00eau c\u1ea7u th\u1ea9m m\u1ef9 cao.<br \/>\n&#8211; Sau h\u00e0n: t\u1ea9y m\u1ed1i h\u00e0n, passivation theo ASTM A380\/A967 \u0111\u1ec3 kh\u00f4i ph\u1ee5c l\u1edbp th\u1ee5 \u0111\u1ed9ng.<\/p>\n<h2 id=\"toc-4-buoc-4-ngan-sach-va-tong-chi-phi-so-huu-tco\">B\u01b0\u1edbc 4 \u2014 Ng\u00e2n s\u00e1ch v\u00e0 t\u1ed5ng chi ph\u00ed s\u1edf h\u1eefu (TCO)<\/h2>\n<p>H\u1ecfi:<br \/>\n&#8211; \u01afu ti\u00ean \u0111\u1ea7u t\u01b0 ban \u0111\u1ea7u hay t\u1ed1i \u01b0u v\u00f2ng \u0111\u1eddi? Chi ph\u00ed d\u1eebng m\u00e1y, thay th\u1ebf, v\u1ec7 sinh \u0111\u1ecbnh k\u1ef3 l\u00e0 bao nhi\u00eau?<br \/>\n&#8211; R\u1ee7i ro an to\u00e0n\/th\u1ef1c ph\u1ea9m n\u1ebfu h\u1ecfng?<\/p>\n<p>Khung chi ph\u00ed t\u01b0\u01a1ng \u0111\u1ed1i t\u1ea1i Vi\u1ec7t Nam (bi\u1ebfn \u0111\u1ed9ng theo Ni\/Mo, ch\u1ec9 \u0111\u1ec3 tham kh\u1ea3o):<br \/>\n&#8211; 201: x1.0 (th\u1ea5p nh\u1ea5t)<br \/>\n&#8211; 430: x1.1\u20131.2<br \/>\n&#8211; 304\/304L: x1.4\u20131.8<br \/>\n&#8211; 316\/316L: x1.9\u20132.5<br \/>\n&#8211; 2205: x2.5\u20133.2<br \/>\n&#8211; 310S: x3.0+<\/p>\n<p>Nguy\u00ean t\u1eafc: n\u1ebfu c\u00f3 chloride ho\u1eb7c y\u00eau c\u1ea7u v\u1ec7 sinh, ch\u1ecdn 316\/duplex th\u01b0\u1eddng r\u1ebb h\u01a1n v\u1ec1 TCO so v\u1edbi 304\/201 ph\u1ea3i b\u1ea3o tr\u00ec\/thay s\u1edbm. Ngo\u00e0i tr\u1eddi ven bi\u1ec3n, ch\u00eanh l\u1ec7ch v\u1ec7 sinh\/\u0111\u00e1nh b\u00f3ng h\u1eb1ng n\u0103m c\u00f3 th\u1ec3 nhanh ch\u00f3ng v\u01b0\u1ee3t chi ph\u00ed ch\u00eanh m\u00e1c.<\/p>\n<h2 id=\"toc-5-buoc-5-tieu-chuan-chung-chi-va-hau-kiem\">B\u01b0\u1edbc 5 \u2014 Ti\u00eau chu\u1ea9n, ch\u1ee9ng ch\u1ec9 v\u00e0 h\u1eadu ki\u1ec3m<\/h2>\n<p>H\u1ecfi:<br \/>\n&#8211; C\u1ea7n MTC (Mill Test Certificate) theo EN 10204 3.1? C\u00f3 y\u00eau c\u1ea7u truy xu\u1ea5t l\u00f4?<br \/>\n&#8211; Ki\u1ec3m tra g\u00ec khi nh\u1eadn h\u00e0ng\/l\u1eafp \u0111\u1eb7t?<\/p>\n<p>Khuy\u1ebfn ngh\u1ecb:<br \/>\n&#8211; Y\u00eau c\u1ea7u MTC ghi r\u00f5 m\u00e1c theo ASTM\/EN\/ISO (v\u00ed d\u1ee5: ASTM A240 304L; EN 1.4307; ISO 15510).<br \/>\n&#8211; Ki\u1ec3m tra PMI (Positive Material Identification) b\u1eb1ng XRF t\u1ea1i ch\u1ed7 v\u1edbi h\u1ea1ng m\u1ee5c quan tr\u1ecdng; tr\u00e1nh ch\u1ec9 d\u00f9ng nam ch\u00e2m (austenitic v\u1eabn c\u00f3 th\u1ec3 nhi\u1ec5m t\u1eeb sau gia c\u00f4ng ngu\u1ed9i).<br \/>\n&#8211; Ki\u1ec3m tra \u0111\u1ed9 d\u00e0y, dung sai, b\u1ec1 m\u1eb7t, weld seam (\u0111\u1ed1i v\u1edbi \u1ed1ng).<br \/>\n&#8211; Sau l\u1eafp \u0111\u1eb7t: v\u1ec7 sinh \u2013 passivation; thi\u1ebft l\u1eadp quy tr\u00ecnh b\u1ea3o tr\u00ec \u0111\u1ecbnh k\u1ef3 ph\u00f9 h\u1ee3p m\u00f4i tr\u01b0\u1eddng.<\/p>\n<h2 id=\"toc-6-bang-cau-hoi-chi-tiet-5-buoc-checklist-ap-dung-nha\">B\u1ea3ng c\u00e2u h\u1ecfi chi ti\u1ebft 5 b\u01b0\u1edbc (Checklist \u00e1p d\u1ee5ng nhanh)<\/h2>\n<p>&#8211; M\u00f4i tr\u01b0\u1eddng<br \/>\n  &#8211; C\u00f3 s\u01b0\u01a1ng mu\u1ed1i\/n\u01b0\u1edbc m\u1eb7n\/ho\u00e1 ch\u1ea5t ch\u1ee9a chloride? N\u1ebfu c\u00f3: \u01b0u ti\u00ean 316L; chloride r\u1ea5t cao\/bi\u1ec3n tr\u1ef1c ti\u1ebfp: 2205. N\u1ebfu kh\u00f4ng: 304L cho ngo\u00e0i tr\u1eddi; 201\/430 cho trong nh\u00e0 kh\u00f4.<br \/>\n  &#8211; Nhi\u1ec7t \u0111\u1ed9 >800\u00b0C? Ch\u1ecdn 310S. 300\u2013800\u00b0C: c\u00e2n nh\u1eafc 309S\/304H theo t\u1ea3i.<br \/>\n  &#8211; Ti\u1ebfp x\u00fac th\u1ef1c ph\u1ea9m\/n\u01b0\u1edbc u\u1ed1ng? Ch\u1ecdn 304\/316; b\u1ec1 m\u1eb7t 2B\/BA; tu\u00e2n th\u1ee7 v\u1ec7 sinh, passivation.<br \/>\n&#8211; C\u01a1 h\u1ecdc v\u00e0 gia c\u00f4ng<br \/>\n  &#8211; K\u1ebft c\u1ea5u ch\u1ecbu l\u1ef1c c\u1ea7n yield cao? C\u00e2n nh\u1eafc 2205 ho\u1eb7c 201 c\u00e1n ngu\u1ed9i; n\u1ebfu h\u00e0n nhi\u1ec1u: 304L\/316L.<br \/>\n  &#8211; D\u1eadp s\u00e2u\/b\u1ebfp c\u00f4ng nghi\u1ec7p\/ch\u1eadu: 304\/304DDQ; tr\u00e1nh 430\/201 cho d\u1eadp s\u00e2u kh\u00f3.<br \/>\n&#8211; Quy c\u00e1ch v\u00e0 b\u1ec1 m\u1eb7t<br \/>\n  &#8211; D\u1ea1ng: t\u1ea5m ASTM A240; \u1ed1ng trang tr\u00ed A554; \u1ed1ng c\u00f4ng nghi\u1ec7p A312; thanh A276; ph\u1ee5 ki\u1ec7n A403.<br \/>\n  &#8211; B\u1ec1 m\u1eb7t: ngo\u00e0i tr\u1eddi ven bi\u1ec3n c\u1ea7n m\u1ecbn (BA\/\u0111\u00e1nh b\u00f3ng m\u1ecbn), lau r\u1eeda \u0111\u1ecbnh k\u1ef3; n\u1ed9i th\u1ea5t: No.4\/HL\/8K t\u00f9y th\u1ea9m m\u1ef9.<br \/>\n  &#8211; \u0110\u1ed9 d\u00e0y: t\u00ednh theo t\u1ea3i\/\u0111\u1ed9 v\u00f5ng; \u1ed1ng \u00e1p l\u1ef1c ch\u1ecdn SCH theo t\u00ednh to\u00e1n.<br \/>\n&#8211; Ng\u00e2n s\u00e1ch\/TCO<br \/>\n  &#8211; N\u1ebfu c\u00f4ng tr\u00ecnh ngo\u00e0i tr\u1eddi \u226510 n\u0103m: n\u00e2ng c\u1ea5p t\u1eeb 201\/430 l\u00ean 304\/316 th\u01b0\u1eddng ti\u1ebft ki\u1ec7m chi ph\u00ed v\u00f2ng \u0111\u1eddi.<br \/>\n  &#8211; D\u1ef1 \u00e1n t\u1ea1m\/gi\u00e1 nh\u1ea1y c\u1ea3m: 201\/430 trong nh\u00e0 kh\u00f4 r\u00e1o, ch\u1ea5p nh\u1eadn b\u1ea3o tr\u00ec.<br \/>\n&#8211; Ti\u00eau chu\u1ea9n v\u00e0 h\u1eadu ki\u1ec3m<br \/>\n  &#8211; Y\u00eau c\u1ea7u EN 10204 3.1; x\u00e1c minh PMI\/XRF cho h\u1ea1ng m\u1ee5c quan tr\u1ecdng; l\u00e0m s\u1ea1ch\u2013passivation sau h\u00e0n; h\u1ed3 s\u01a1 QA\/QC ho\u00e0n ch\u1ec9nh.<\/p>\n<h2 id=\"toc-7-vi-du-thuc-te-tai-viet-nam\">V\u00ed d\u1ee5 th\u1ef1c t\u1ebf t\u1ea1i Vi\u1ec7t Nam<\/h2>\n<p>&#8211; Lan can ngo\u00e0i tr\u1eddi t\u1ea1i H\u00e0 N\u1ed9i (xa bi\u1ec3n, \u0111\u00f4 th\u1ecb, m\u01b0a axit nh\u1eb9): 304\/304L b\u1ec1 m\u1eb7t No.4\/HL m\u1ecbn ho\u1eb7c BA, v\u1ec7 sinh 1\u20132 l\u1ea7n\/ qu\u00fd. Tr\u00e1nh 201 n\u1ebfu kh\u00f4ng mu\u1ed1n \u1ed1 tr\u00e0 s\u1edbm.<br \/>\n&#8211; B\u1ec3\/thi\u1ebft b\u1ecb ti\u1ebfp x\u00fac n\u01b0\u1edbc mu\u1ed1i (l\u00e0ng ngh\u1ec1 n\u01b0\u1edbc m\u1eafm Nam \u0110\u1ecbnh): 316L ho\u1eb7c duplex 2205 n\u1ebfu n\u1ed3ng \u0111\u1ed9 mu\u1ed1i cao\/\u0111\u1ecdng mu\u1ed1i; b\u1ec1 m\u1eb7t BA\/\u0111\u00e1nh b\u00f3ng m\u1ecbn, b\u1eaft bu\u1ed9c passivation.<br \/>\n&#8211; \u1ed0ng kh\u00f3i\/gi\u00e1 \u0111\u1ee1 trong l\u00f2 900\u00b0C: 310S; thi\u1ebft k\u1ebf gi\u00e3n n\u1edf nhi\u1ec7t; ki\u1ec3m so\u00e1t oxy h\u00f3a.<br \/>\n&#8211; B\u00e0n ch\u1eadu b\u1ebfp nh\u00e0 h\u00e0ng, F&#038;B: 304\/304L, t\u1ea5m 2B\/BA, m\u1ed1i h\u00e0n \u0111\u01b0\u1ee3c t\u1ea9y v\u00e0 passivation; tr\u00e1nh ch\u1ea5t t\u1ea9y c\u00f3 chloride.<\/p>\n<h2 id=\"toc-8-so-sanh-nhanh-cac-mac-pho-bien\">So s\u00e1nh nhanh c\u00e1c m\u00e1c ph\u1ed5 bi\u1ebfn<\/h2>\n<p>&#8211; 201 (AISI 201): Ni th\u1ea5p (\u22483.5\u20135.5%), Mn cao; r\u1ebb, c\u1ee9ng sau c\u00e1n ngu\u1ed9i, ch\u1ed1ng g\u1ec9 trung b\u00ecnh; ph\u00f9 h\u1ee3p n\u1ed9i th\u1ea5t kh\u00f4, c\u1ea7n c\u00e2n nh\u1eafc ngo\u00e0i tr\u1eddi.<br \/>\n&#8211; 304\/304L (1.4301\/1.4307): \u0111a d\u1ee5ng, d\u1ec5 h\u00e0n\u2013d\u1eadp; ti\u00eau chu\u1ea9n cho F&#038;B, ngo\u00e0i tr\u1eddi \u0111\u00f4 th\u1ecb; 304L ch\u1ed1ng \u0103n m\u00f2n k\u1ebd h\u00e0n t\u1ed1t h\u01a1n khi h\u00e0n d\u00e0y.<br \/>\n&#8211; 316\/316L (1.4401\/1.4404): th\u00eam Mo, ch\u1ed1ng r\u1ed7 chloride; d\u00f9ng ven bi\u1ec3n, h\u00f3a ch\u1ea5t nh\u1eb9, F&#038;B cao c\u1ea5p.<br \/>\n&#8211; 430 (1.4016): ferritic, kh\u00f4ng Ni, gi\u00e1 th\u1ea5p, t\u1eeb t\u00ednh, ch\u1ed1ng g\u1ec9 k\u00e9m h\u01a1n 304; n\u1ed9i th\u1ea5t kh\u00f4\/\u1ed1p trang tr\u00ed.<br \/>\n&#8211; 310S (1.4845): ch\u1ecbu nhi\u1ec7t r\u1ea5t t\u1ed1t; d\u00f9ng m\u00f4i tr\u01b0\u1eddng >800\u00b0C.<br \/>\n&#8211; Duplex 2205 (1.4462): ch\u1ed1ng r\u1ed7\/n\u1ee9t chloride cao, b\u1ec1n ch\u1ea3y l\u1edbn; d\u00f9ng bi\u1ec3n, h\u00f3a ch\u1ea5t, k\u1ebft c\u1ea5u ch\u1ecbu l\u1ef1c.<br \/>\n&#8211; 410\/420: c\u1ee9ng, ch\u1ecbu m\u00e0i m\u00f2n; ch\u1ed1ng g\u1ec9 th\u1ea5p; d\u00f9ng dao, chi ti\u1ebft ch\u1ecbu m\u00e0i nh\u01b0ng kh\u00f4.<\/p>\n<p>Ngu\u1ed3n th\u00e0nh ph\u1ea7n\/thu\u1ed9c t\u00ednh: EN 10088, ISO 15510; datasheet Outokumpu; ASTM A240\/A276\/A312\/A554.<\/p>\n<h2 id=\"toc-9-sai-lam-thuong-gap-can-tranh\">Sai l\u1ea7m th\u01b0\u1eddng g\u1eb7p c\u1ea7n tr\u00e1nh<\/h2>\n<p>&#8211; D\u00f9ng nam ch\u00e2m \u0111\u1ec3 \u201c\u0111o\u00e1n\u201d m\u00e1c: austenitic c\u00f3 th\u1ec3 nhi\u1ec5m t\u1eeb nh\u1eb9; ch\u1ec9 PMI\/XRF m\u1edbi ch\u1eafc ch\u1eafn.<br \/>\n&#8211; Ch\u1ecdn 201\/430 cho ven bi\u1ec3n v\u00ec r\u1ebb: chi ph\u00ed v\u1ec7 sinh\/thay th\u1ebf s\u1ebd \u0111\u1ed9i l\u00ean nhanh.<br \/>\n&#8211; B\u1ecf qua b\u1ec1 m\u1eb7t v\u00e0 thi\u1ebft k\u1ebf ch\u1ed1ng \u0111\u1ecdng n\u01b0\u1edbc: b\u1ec1 m\u1eb7t th\u00f4, khe h\u1edf gi\u1eef mu\u1ed1i l\u00e0m t\u0103ng r\u1ed7.<br \/>\n&#8211; Kh\u00f4ng passivation sau h\u00e0n: m\u1ed1i h\u00e0n tr\u1edf th\u00e0nh \u0111i\u1ec3m g\u1ec9 s\u1edbm.<br \/>\n&#8211; Thi\u1ebfu ch\u1ee9ng ch\u1ec9 3.1 v\u00e0 ki\u1ec3m tra khi nh\u1eadn h\u00e0ng: r\u1ee7i ro l\u1eabn m\u00e1c, \u1ea3nh h\u01b0\u1edfng an to\u00e0n.<\/p>\n<h2 id=\"toc-10-nguon-tham-khao\">Ngu\u1ed3n tham kh\u1ea3o<\/h2>\n<p>&#8211; Nickel Institute, \u201cStainless Steels in Water\u201d (Publication 11 024)<br \/>\n&#8211; Outokumpu, Stainless Steel Handbook &#038; Grade Datasheets<br \/>\n&#8211; ASTM International: ASTM A240\/A240M, A312, A554, A276, A380, A967<br \/>\n&#8211; EN 10088; ISO 15510; EN 10204 3.1<\/p>\n<h2 id=\"toc-11-ket-luan\">K\u1ebft lu\u1eadn<\/h2>\n<p>Ch\u1ecdn \u0111\u00fang Inox b\u1eaft \u0111\u1ea7u t\u1eeb 5 c\u00e2u h\u1ecfi: m\u00f4i tr\u01b0\u1eddng, c\u01a1 h\u1ecdc\u2013gia c\u00f4ng, quy c\u00e1ch\u2013b\u1ec1 m\u1eb7t, ng\u00e2n s\u00e1ch\u2013TCO, v\u00e0 ti\u00eau chu\u1ea9n\u2013h\u1eadu ki\u1ec3m. Trong \u0111a s\u1ed1 \u1ee9ng d\u1ee5ng:<br \/>\n&#8211; 304\/304L l\u00e0 l\u1ef1a ch\u1ecdn an to\u00e0n cho ngo\u00e0i tr\u1eddi \u0111\u00f4 th\u1ecb\/F&#038;B.<br \/>\n&#8211; 316\/316L cho chloride\/h\u01a1i mu\u1ed1i ho\u1eb7c y\u00eau c\u1ea7u v\u1ec7 sinh cao.<br \/>\n&#8211; 201\/430 cho n\u1ed9i th\u1ea5t kh\u00f4, ng\u00e2n s\u00e1ch h\u1ea1n ch\u1ebf.<br \/>\n&#8211; 2205\/310S cho \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t (chloride cao\/nhi\u1ec7t cao).<br \/>\nK\u1ebft h\u1ee3p b\u1ec1 m\u1eb7t m\u1ecbn, thi\u1ebft k\u1ebf ch\u1ed1ng \u0111\u1ecdng n\u01b0\u1edbc, passivation v\u00e0 ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng \u0111\u1ec3 t\u1ed1i \u0111a \u0111\u1ed9 b\u1ec1n v\u00e0 t\u1ed1i \u01b0u chi ph\u00ed v\u00f2ng \u0111\u1eddi.<\/p>\n<p>C\u1ea7n kh\u00f3a ch\u1ecdn nhanh theo d\u1ef1 \u00e1n c\u1ee7a b\u1ea1n? Li\u00ean h\u1ec7 Inox Cuong Thinh \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n m\u00e1c, 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>\u00c1p d\u1ee5ng 5 b\u01b0\u1edbc h\u1ecfi\u2013\u0111\u00e1p \u0111\u1ec3 ch\u1ecdn \u0111\u00fang m\u00e1c, chi\u1ec1u d\u00e0y, b\u1ec1 m\u1eb7t v\u00e0 ti\u00eau chu\u1ea9n Inox cho m\u00f4i tr\u01b0\u1eddng l\u00e0m vi\u1ec7c, \u0111\u1ea3m b\u1ea3o hi\u1ec7u n\u0103ng v\u00e0 t\u1ed1i \u01b0u chi ph\u00ed s\u1edf h\u1eefu.<\/p>\n","protected":false},"author":7,"featured_media":1024,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-1615","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\/1615","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=1615"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/1615\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1024"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=1615"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=1615"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=1615"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}