{"id":1153,"date":"2025-10-07T00:33:45","date_gmt":"2025-10-06T17:33:45","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/du-an-ngan-sach-thap-toi-uu-chi-phi-inox-201-304-430\/"},"modified":"2025-10-07T00:33:45","modified_gmt":"2025-10-06T17:33:45","slug":"du-an-ngan-sach-thap-toi-uu-chi-phi-inox-201-304-430","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/du-an-ngan-sach-thap-toi-uu-chi-phi-inox-201-304-430\/","title":{"rendered":"D\u1ef1 \u00e1n ng\u00e2n s\u00e1ch th\u1ea5p: T\u1ed1i \u01b0u chi ph\u00ed inox 201\/304\/430"},"content":{"rendered":"<div class=\"custom-toc\">\n<h3>N\u1ed9i dung ch\u00ednh<\/h3>\n<ul>\n<li><a href=\"#toc-0-nguyen-tac-cot-loi-chi-phi-vong-doi-thay-vi-giakg\">Nguy\u00ean t\u1eafc c\u1ed1t l\u00f5i: chi ph\u00ed v\u00f2ng \u0111\u1eddi thay v\u00ec gi\u00e1\/kg<\/a><\/li>\n<li><a href=\"#toc-1-chon-mac-inox-theo-moi-truong-khi-ngan-sach-han-ch\">Ch\u1ecdn m\u00e1c inox theo m\u00f4i tr\u01b0\u1eddng khi ng\u00e2n s\u00e1ch h\u1ea1n ch\u1ebf<\/a><\/li>\n<li><a href=\"#toc-2-toi-uu-do-day-giam-kg-tang-do-cung-cuc-bo\">T\u1ed1i \u01b0u \u0111\u1ed9 d\u00e0y: gi\u1ea3m kg, t\u0103ng \u0111\u1ed9 c\u1ee9ng c\u1ee5c b\u1ed9<\/a><\/li>\n<li><a href=\"#toc-3-be-mat-va-hoan-thien-dep-vua-du-de-ve-sinh-it-chi-\">B\u1ec1 m\u1eb7t v\u00e0 ho\u00e0n thi\u1ec7n: \u0111\u1eb9p v\u1eeba \u0111\u1ee7, d\u1ec5 v\u1ec7 sinh, \u00edt chi ph\u00ed<\/a><\/li>\n<li><a href=\"#toc-4-gia-cong-tiet-kiem-chon-quy-trinh-phu-hop-tung-mac\">Gia c\u00f4ng ti\u1ebft ki\u1ec7m: ch\u1ecdn quy tr\u00ecnh ph\u00f9 h\u1ee3p t\u1eebng m\u00e1c<\/a><\/li>\n<li><a href=\"#toc-5-thiet-ke-chong-an-mon-thiet-ke-tot-re-hon-mac-cao\">Thi\u1ebft k\u1ebf ch\u1ed1ng \u0103n m\u00f2n: \u201cthi\u1ebft k\u1ebf t\u1ed1t\u201d r\u1ebb h\u01a1n \u201cm\u00e1c cao\u201d<\/a><\/li>\n<li><a href=\"#toc-6-chien-luoc-thay-the-mac-thong-minh\">Chi\u1ebfn l\u01b0\u1ee3c thay th\u1ebf m\u00e1c th\u00f4ng minh<\/a><\/li>\n<li><a href=\"#toc-7-mua-hang-thong-minh-tai-ha-noi\">Mua h\u00e0ng th\u00f4ng minh t\u1ea1i H\u00e0 N\u1ed9i<\/a><\/li>\n<li><a href=\"#toc-8-case-study-rut-gon-voi-so-lieu-dinh-huong\">Case study r\u00fat g\u1ecdn v\u1edbi s\u1ed1 li\u1ec7u \u0111\u1ecbnh h\u01b0\u1edbng<\/a><\/li>\n<li><a href=\"#toc-9-10-buoc-trien-khai-du-an-inox-ngan-sach-thap\">10 b\u01b0\u1edbc tri\u1ec3n khai d\u1ef1 \u00e1n inox ng\u00e2n s\u00e1ch th\u1ea5p<\/a><\/li>\n<li><a href=\"#toc-10-loi-thuong-gap-khien-doi-du-an-dat-gap-doi\">L\u1ed7i th\u01b0\u1eddng g\u1eb7p khi\u1ebfn \u0111\u1ed9i d\u1ef1 \u00e1n \u201c\u0111\u1eaft g\u1ea5p \u0111\u00f4i\u201d<\/a><\/li>\n<li><a href=\"#toc-11-tinh-nhanh-chi-phi-vong-doi-uoc-luong-hien-truong\">T\u00ednh nhanh chi ph\u00ed v\u00f2ng \u0111\u1eddi (\u01b0\u1edbc l\u01b0\u1ee3ng hi\u1ec7n tr\u01b0\u1eddng)<\/a><\/li>\n<li><a href=\"#toc-12-khi-nao-nen-chiu-chi-mac-cao-hon\">Khi n\u00e0o n\u00ean \u201cch\u1ecbu chi\u201d m\u00e1c cao h\u01a1n?<\/a><\/li>\n<li><a href=\"#toc-13-ket-luan\">K\u1ebft lu\u1eadn<\/a><\/li>\n<\/ul>\n<\/div>\n<p>Khi ng\u00e2n s\u00e1ch b\u1ecb si\u1ebft ch\u1eb7t, nhi\u1ec1u \u0111\u1ed9i d\u1ef1 \u00e1n ph\u1ea3i c\u1eaft gi\u1ea3m \u1edf h\u1ea1ng m\u1ee5c v\u1eadt li\u1ec7u. V\u1edbi inox, n\u1ebfu t\u1ed1i \u01b0u \u0111\u00fang, b\u1ea1n v\u1eabn c\u00f3 th\u1ec3 gi\u1ea3m 15\u201330% chi ph\u00ed \u0111\u1ea7u t\u01b0 ban \u0111\u1ea7u v\u00e0 10\u201320% chi ph\u00ed v\u00f2ng \u0111\u1eddi m\u00e0 kh\u00f4ng \u0111\u00e1nh \u0111\u1ed5i \u0111\u1ed9 b\u1ec1n ho\u1eb7c an to\u00e0n. B\u00e0i vi\u1ebft n\u00e0y t\u1eadp trung v\u00e0o c\u00e1ch ch\u1ecdn m\u00e1c, \u0111\u1ed9 d\u00e0y, b\u1ec1 m\u1eb7t v\u00e0 ph\u01b0\u01a1ng \u00e1n gia c\u00f4ng \u2013 nh\u1eefng \u0111\u00f2n b\u1ea9y c\u00f3 hi\u1ec7u qu\u1ea3 nh\u1ea5t cho d\u1ef1 \u00e1n ng\u00e2n s\u00e1ch th\u1ea5p. Ch\u1ee7 \u0111\u1ec1 n\u00e0y n\u1eb1m trong b\u1ee9c tranh t\u1ed5ng th\u1ec3 v\u1ec1 l\u1ef1a ch\u1ecdn inox theo m\u00f4i tr\u01b0\u1eddng, m\u1ee5c \u0111\u00edch v\u00e0 ng\u00e2n s\u00e1ch, nh\u01b0ng n\u1ed9i dung d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ee7 tr\u1ecdn v\u1eb9n \u0111\u1ec3 b\u1ea1n \u00e1p d\u1ee5ng ngay.<\/p>\n<h2 id=\"toc-0-nguyen-tac-cot-loi-chi-phi-vong-doi-thay-vi-giakg\">Nguy\u00ean t\u1eafc c\u1ed1t l\u00f5i: chi ph\u00ed v\u00f2ng \u0111\u1eddi thay v\u00ec gi\u00e1\/kg<\/h2>\n<p>&#8211; TCO (Total Cost of Ownership) = Gi\u00e1 v\u1eadt li\u1ec7u + Gia c\u00f4ng + L\u1eafp \u0111\u1eb7t + B\u1ea3o tr\u00ec + R\u1ee7i ro d\u1eebng m\u00e1y\/\u0103n m\u00f2n.<br \/>\n&#8211; Quy t\u1eafc 80\/20: 20% quy\u1ebft \u0111\u1ecbnh (m\u00e1c th\u00e9p, \u0111\u1ed9 d\u00e0y, b\u1ec1 m\u1eb7t, thi\u1ebft k\u1ebf ch\u1ed1ng k\u1ebd h\u1edf) quy\u1ebft \u0111\u1ecbnh 80% chi ph\u00ed v\u00f2ng \u0111\u1eddi.<br \/>\n&#8211; \u0110\u1eebng \u201cover-spec\u201d: ch\u1ecdn m\u00e1c cao h\u01a1n c\u1ea7n thi\u1ebft th\u01b0\u1eddng l\u00e3ng ph\u00ed; nh\u01b0ng \u201cunder-spec\u201d trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t t\u1ea1o chi ph\u00ed b\u1ea3o tr\u00ec l\u1edbn h\u01a1n nhi\u1ec1u.<\/p>\n<p>Ch\u1ec9 s\u1ed1 gi\u00e1 tham kh\u1ea3o t\u1ea1i H\u00e0 N\u1ed9i (bi\u1ebfn \u0111\u1ed9ng theo Ni\/Cr, ch\u1ec9 d\u00f9ng \u0111\u1ec3 so s\u00e1nh):<br \/>\n&#8211; 201 = 0,60\u20130,70 so v\u1edbi 304<br \/>\n&#8211; 430\/439\/441 = 0,60\u20130,75 so v\u1edbi 304<br \/>\n&#8211; 304\/304L = 1,00 (m\u1ed1c)<br \/>\n&#8211; 316\/316L = 1,25\u20131,50 so v\u1edbi 304<br \/>\n&#8211; Duplex 2205 = 1,60\u20131,90 so v\u1edbi 304<\/p>\n<h2 id=\"toc-1-chon-mac-inox-theo-moi-truong-khi-ngan-sach-han-ch\">Ch\u1ecdn m\u00e1c inox theo m\u00f4i tr\u01b0\u1eddng khi ng\u00e2n s\u00e1ch h\u1ea1n ch\u1ebf<\/h2>\n<h3>M\u00f4i tr\u01b0\u1eddng kh\u00f4 trong nh\u00e0 (v\u0103n ph\u00f2ng, kho, \u0111\u1ed3 n\u1ed9i th\u1ea5t c\u00f4ng nghi\u1ec7p)<\/h3>\n<p>&#8211; \u01afu ti\u00ean: 430\/439 (ferritic, \u00edt ho\u1eb7c kh\u00f4ng Ni, ch\u1ed1ng \u0103n m\u00f2n t\u1ed1t trong nh\u00e0, chi ph\u00ed th\u1ea5p).<br \/>\n&#8211; Khi c\u1ea7n t\u1ea1o h\u00ecnh s\u00e2u\/\u0111\u00f2i h\u1ecfi th\u1ea9m m\u1ef9 cao: 304 m\u1ecfng h\u01a1n thay v\u00ec 430 d\u00e0y h\u01a1n.<br \/>\n&#8211; L\u01b0u \u00fd: 430 t\u1eeb t\u00ednh; h\u00e0n c\u1ea7n ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ec3 tr\u00e1nh gi\u00f2n v\u00f9ng m\u1ed1i h\u00e0n.<\/p>\n<h3>M\u00f4i tr\u01b0\u1eddng trong nh\u00e0 \u1ea9m nh\u1eb9 (x\u01b0\u1edfng ch\u1ebf t\u1ea1o, nh\u00e0 m\u00e1y kh\u00f4ng c\u00f3 chloride)<\/h3>\n<p>&#8211; \u01afu ti\u00ean: 201 cho k\u1ebft c\u1ea5u\/\u1ed1p trang tr\u00ed kh\u00f4ng ti\u1ebfp x\u00fac th\u1ef1c ph\u1ea9m; 304 cho chi ti\u1ebft h\u00e0n nhi\u1ec1u\/\u0111\u1ecbnh h\u00ecnh s\u00e2u.<br \/>\n&#8211; L\u01b0u \u00fd: 201 k\u00e9m b\u1ec1n chloride; tr\u00e1nh g\u1ea7n bi\u1ec3n, b\u1ec3 h\u00f3a ch\u1ea5t, n\u01b0\u1edbc t\u1ea9y clo.<\/p>\n<h3>Th\u1ef1c ph\u1ea9m\/n\u01b0\u1edbc u\u1ed1ng, y t\u1ebf<\/h3>\n<p>&#8211; \u01afu ti\u00ean: 304\/304L (chu\u1ea9n ng\u00e0nh), 316\/316L cho khu v\u1ef1c c\u00f3 chloride ho\u1eb7c s\u00e1t bi\u1ec3n.<br \/>\n&#8211; Ti\u1ebft ki\u1ec7m: t\u1ed1i \u01b0u b\u1ec1 m\u1eb7t (2B\/No.4) v\u00e0 \u0111\u1ed9 d\u00e0y; kh\u00f4ng h\u1ea1 xu\u1ed1ng 201 v\u1edbi ti\u1ebfp x\u00fac th\u1ef1c ph\u1ea9m.<\/p>\n<h3>Ngo\u00e0i tr\u1eddi \u0111\u00f4 th\u1ecb (kh\u00f4ng s\u00e1t bi\u1ec3n)<\/h3>\n<p>&#8211; \u01afu ti\u00ean: 304 v\u1edbi thi\u1ebft k\u1ebf ch\u1ed1ng \u0111\u1ecdng n\u01b0\u1edbc v\u00e0 l\u1ecbch r\u1eeda \u0111\u1ecbnh k\u1ef3.<br \/>\n&#8211; N\u1ebfu y\u00eau c\u1ea7u b\u1ea3o tr\u00ec th\u1ea5p: 316 \u1edf v\u1ecb tr\u00ed b\u1eaft v\u00edt\/lan can ti\u1ebfp x\u00fac m\u01b0a h\u1eaft; ph\u1ea7n th\u00e2n v\u1eabn 304 \u0111\u1ec3 c\u00e2n \u0111\u1ed1i chi ph\u00ed.<\/p>\n<h3>V\u00f9ng ven bi\u1ec3n, chloride cao, h\u00f3a ch\u1ea5t nh\u1eb9<\/h3>\n<p>&#8211; \u01afu ti\u00ean: 316\/316L.<br \/>\n&#8211; Ph\u01b0\u01a1ng \u00e1n ti\u1ebft ki\u1ec7m: 304 cho c\u1ea5u ki\u1ec7n cao\/kh\u00f3 ti\u1ebfp x\u00fac chloride + 316 cho \u1ed1c v\u00edt, ch\u00e2n \u0111\u1ebf, m\u00e9p h\u00e0n; b\u1ed5 sung r\u1eeda n\u01b0\u1edbc ng\u1ecdt \u0111\u1ecbnh k\u1ef3. Kh\u00f4ng d\u00f9ng 201 ngo\u00e0i tr\u1eddi bi\u1ec3n.<\/p>\n<h2 id=\"toc-2-toi-uu-do-day-giam-kg-tang-do-cung-cuc-bo\">T\u1ed1i \u01b0u \u0111\u1ed9 d\u00e0y: gi\u1ea3m kg, t\u0103ng \u0111\u1ed9 c\u1ee9ng c\u1ee5c b\u1ed9<\/h2>\n<p>&#8211; Nguy\u00ean t\u1eafc: m\u00e1c d\u1ebbo t\u1ed1t (304) cho ph\u00e9p gi\u1ea3m 0,2\u20130,5 mm so v\u1edbi 201\/430 khi c\u00f3 g\u00e2n t\u0103ng c\u1ee9ng.<br \/>\n&#8211; Gi\u1ea3i ph\u00e1p:<br \/>\n  &#8211; D\u1eadp g\u00e2n, th\u00eam s\u01b0\u1eddn (stiffener) thay v\u00ec t\u0103ng t\u1ea5m.<br \/>\n  &#8211; D\u00f9ng g\u1ea5p m\u00e9p (hem) \u1edf c\u1ea1nh \u0111\u1ec3 t\u0103ng \u0111\u1ed9 c\u1ee9ng, gi\u1ea3m v\u00eanh.<br \/>\n  &#8211; T\u1ed1i \u01b0u nh\u1ecbp \u0111\u1ee1: r\u00fat kho\u1ea3ng c\u00e1ch g\u1ed1i \u0111\u1ee1 t\u1eeb 900 mm xu\u1ed1ng 600\u2013700 mm c\u00f3 th\u1ec3 gi\u1ea3m t\u1ea5m 0,3 mm.<br \/>\n&#8211; Quy t\u1eafc nhanh cho m\u1eb7t b\u00e0n\/b\u1ec7: 304 t\u1ea5m 1,2 mm + g\u00e2n hat-section th\u01b0\u1eddng thay th\u1ebf \u0111\u01b0\u1ee3c 201\/430 t\u1ea5m 1,5 mm v\u1edbi \u0111\u1ed9 v\u00f5ng t\u01b0\u01a1ng \u0111\u01b0\u01a1ng.<\/p>\n<h2 id=\"toc-3-be-mat-va-hoan-thien-dep-vua-du-de-ve-sinh-it-chi-\">B\u1ec1 m\u1eb7t v\u00e0 ho\u00e0n thi\u1ec7n: \u0111\u1eb9p v\u1eeba \u0111\u1ee7, d\u1ec5 v\u1ec7 sinh, \u00edt chi ph\u00ed<\/h2>\n<p>&#8211; 2B: kinh t\u1ebf nh\u1ea5t, \u0111\u1ee7 m\u1ecbn cho b\u1ebfp c\u00f4ng nghi\u1ec7p sau \u0111\u00e1nh x\u01b0\u1edbc nh\u1eb9.<br \/>\n&#8211; No.4\/Hairline: th\u1ea9m m\u1ef9 t\u1ed1t, che v\u1ebft tr\u1ea7y s\u1eed d\u1ee5ng; chi ph\u00ed trung b\u00ecnh.<br \/>\n&#8211; BA\/Mirror (No.8): \u0111\u1eaft, d\u1ec5 l\u1ed9 v\u1ebft x\u01b0\u1edbc; ch\u1ec9 d\u00f9ng khi th\u1ef1c s\u1ef1 c\u1ea7n.<br \/>\n&#8211; Ti\u1ebft ki\u1ec7m th\u00f4ng minh:<br \/>\n  &#8211; D\u00f9ng 2B cho m\u1eb7t khu\u1ea5t, No.4 cho m\u1eb7t l\u1ed9.<br \/>\n  &#8211; X\u1eed l\u00fd th\u1ee5 \u0111\u1ed9ng h\u00f3a b\u1ec1 m\u1eb7t sau h\u00e0n (axit citric\/nitric theo khuy\u1ebfn ngh\u1ecb an to\u00e0n) \u0111\u1ec3 t\u0103ng ch\u1ed1ng \u0103n m\u00f2n thay v\u00ec chuy\u1ec3n l\u00ean m\u00e1c cao.<br \/>\n  &#8211; Tr\u00e1nh s\u01a1n ph\u1ee7 \u201cch\u1eefa ch\u00e1y\u201d cho 304\/201 ngo\u00e0i bi\u1ec3n \u2013 l\u1edbp s\u01a1n nhanh xu\u1ed1ng c\u1ea5p, t\u1ed5ng chi ph\u00ed th\u01b0\u1eddng cao h\u01a1n so v\u1edbi ch\u1ecdn 316 \u0111\u00fang ch\u1ed7.<\/p>\n<h2 id=\"toc-4-gia-cong-tiet-kiem-chon-quy-trinh-phu-hop-tung-mac\">Gia c\u00f4ng ti\u1ebft ki\u1ec7m: ch\u1ecdn quy tr\u00ecnh ph\u00f9 h\u1ee3p t\u1eebng m\u00e1c<\/h2>\n<p>&#8211; 304\/304L: h\u00e0n MIG\/TIG \u1ed5n \u0111\u1ecbnh; d\u00f9ng 304L gi\u1ea3m nguy c\u01a1 \u0103n m\u00f2n \u0111\u01b0\u1eddng ranh (gi\u1ea3m chi ph\u00ed x\u1eed l\u00fd sau h\u00e0n).<br \/>\n&#8211; 201: d\u1ec5 bi\u1ebfn c\u1ee9ng khi d\u1eadp; c\u1ea7n b\u00f4i tr\u01a1n t\u1ed1t v\u00e0 ki\u1ec3m so\u00e1t l\u1ef1c \u0111\u1ec3 gi\u1ea3m ph\u1ebf ph\u1ea9m. H\u1ea1n ch\u1ebf h\u00e0n d\u00e0i \u1edf chi ti\u1ebft m\u1ecfng.<br \/>\n&#8211; 430\/439: d\u1eabn nhi\u1ec7t cao, gi\u00e3n n\u1edf th\u1ea5p; ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ea7u v\u00e0o \u0111\u1ec3 tr\u00e1nh cong v\u00eanh. Ch\u1ecdn que h\u00e0n ph\u00f9 h\u1ee3p (v\u00ed d\u1ee5 308L khi h\u00e0n 430 v\u1edbi 304).<br \/>\n&#8211; C\u1eaft: laser fiber cho t\u1ea5m \u22648 mm gi\u00fap gi\u1ea3m bavia, ti\u1ebft ki\u1ec7m c\u00f4ng l\u00e0m s\u1ea1ch. T\u1eadn d\u1ee5ng d\u1ecbch v\u1ee5 c\u1eaft chung (nesting) \u0111\u1ec3 gi\u1ea3m hao h\u1ee5t.<br \/>\n&#8211; L\u1eafp gh\u00e9p: \u01b0u ti\u00ean bulong inox \u0111\u1ed3ng c\u1ea5p m\u00e1c, tr\u00e1nh pha tr\u1ed9n (304 v\u1edbi 201\/\u1ed1c th\u00e9p \u0111en) g\u00e2y \u0103n m\u00f2n \u0111i\u1ec7n h\u00f3a.<\/p>\n<h2 id=\"toc-5-thiet-ke-chong-an-mon-thiet-ke-tot-re-hon-mac-cao\">Thi\u1ebft k\u1ebf ch\u1ed1ng \u0103n m\u00f2n: \u201cthi\u1ebft k\u1ebf t\u1ed1t\u201d r\u1ebb h\u01a1n \u201cm\u00e1c cao\u201d<\/h2>\n<p>&#8211; Tr\u00e1nh k\u1ebd h\u1edf, n\u01b0\u1edbc \u0111\u1ecdng: bo tr\u00f2n g\u00f3c k\u00edn, kho\u00e9t l\u1ed7 tho\u00e1t n\u01b0\u1edbc \u1edf g\u00e2n h\u1ed9p, nghi\u00eang b\u1ec1 m\u1eb7t \u22653\u00b0.<br \/>\n&#8211; Gi\u1ea3m v\u00f9ng ch\u1ecbu chloride: \u01b0u ti\u00ean v\u1ecb tr\u00ed l\u1eafp khu\u1ea5t m\u01b0a bi\u1ec3n, h\u1ea1n ch\u1ebf phun s\u01b0\u01a1ng mu\u1ed1i tr\u1ef1c di\u1ec7n.<br \/>\n&#8211; C\u00f4 l\u1eadp kim lo\u1ea1i kh\u00e1c nhau: d\u00f9ng gio\u0103ng\/long-\u0111en nylon\/PTFE gi\u1eefa inox v\u00e0 th\u00e9p carbon\/nh\u00f4m.<br \/>\n&#8211; B\u1ea3o tr\u00ec \u0111\u1ecbnh k\u1ef3: r\u1eeda n\u01b0\u1edbc s\u1ea1ch 1\u20133 th\u00e1ng\/l\u1ea7n ngo\u00e0i tr\u1eddi; chi ph\u00ed nh\u1ecf nh\u01b0ng k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd m\u00e1c th\u1ea5p.<\/p>\n<h2 id=\"toc-6-chien-luoc-thay-the-mac-thong-minh\">Chi\u1ebfn l\u01b0\u1ee3c thay th\u1ebf m\u00e1c th\u00f4ng minh<\/h2>\n<p>&#8211; 304 \u2192 430 trong nh\u00e0 kh\u00f4: ti\u1ebft ki\u1ec7m 20\u201335% khi kh\u00f4ng y\u00eau c\u1ea7u h\u00e0n ph\u1ee9c t\u1ea1p ho\u1eb7c t\u1ea1o h\u00ecnh s\u00e2u.<br \/>\n&#8211; 304 \u2192 201 trong x\u01b0\u1edfng \u1ea9m nh\u1eb9, kh\u00f4ng chloride: ti\u1ebft ki\u1ec7m 25\u201335% cho \u1ed1p, v\u00e1ch, k\u1ec7 nh\u1eb9.<br \/>\n&#8211; 316 c\u1ee5c b\u1ed9: d\u00f9ng 316 cho bulong\/ph\u1ee5 ki\u1ec7n n\u1ec1n v\u00e0 304 cho th\u00e2n; gi\u1ea3m 10\u201320% so v\u1edbi \u201call-316\u201d m\u00e0 v\u1eabn an to\u00e0n.<br \/>\n&#8211; 316 \u2192 Duplex 2205 cho k\u1ebft c\u1ea5u ch\u1ecbu l\u1ef1c\/\u0103n m\u00f2n cao: CAPEX t\u0103ng nh\u01b0ng cho ph\u00e9p gi\u1ea3m \u0111\u1ed9 d\u00e0y 15\u201330% v\u00e0 tu\u1ed5i th\u1ecd cao h\u01a1n; d\u00f9ng khi t\u1ea3i l\u1edbn, chloride cao.<br \/>\n&#8211; Kh\u00f4ng khuy\u1ebfn ngh\u1ecb: 201 ngo\u00e0i tr\u1eddi bi\u1ec3n; 304 s\u01a1n ph\u1ee7 thay cho 316 \u1edf b\u1ebfn n\u01b0\u1edbc \u2013 chi ph\u00ed b\u1ea3o tr\u00ec t\u00edch l\u0169y s\u1ebd v\u01b0\u1ee3t xa.<\/p>\n<h2 id=\"toc-7-mua-hang-thong-minh-tai-ha-noi\">Mua h\u00e0ng th\u00f4ng minh t\u1ea1i H\u00e0 N\u1ed9i<\/h2>\n<p>&#8211; Quy c\u00e1ch ph\u1ed5 bi\u1ebfn:<br \/>\n  &#8211; T\u1ea5m\/coil r\u1ed9ng 1219 mm v\u00e0 1500 mm; d\u00e0y 0,5\u20133,0 mm (t\u1ea5m m\u1ecfng), 4\u201312 mm (t\u1ea5m d\u00e0y).<br \/>\n  &#8211; \u1ed0ng\/h\u1ed9p 6 m; thanh la, V ti\u00eau chu\u1ea9n.<br \/>\n&#8211; M\u1eb9o ti\u1ebft ki\u1ec7m:<br \/>\n  &#8211; T\u1ed1i \u01b0u layout theo kh\u1ed5 1219\/1500 \u0111\u1ec3 gi\u1ea3m r\u00eca th\u1eeba.<br \/>\n  &#8211; H\u1ecfi h\u00e0ng \u201ct\u1ed3n kho\u201d\/\u201cph\u00f4i th\u1eeba\u201d c\u00f9ng m\u00e1c-b\u1ec1 m\u1eb7t, ch\u1ea5p nh\u1eadn sai s\u1ed1 k\u00edch th\u01b0\u1edbc nh\u1ecf \u0111\u1ec3 h\u1ea1 gi\u00e1.<br \/>\n  &#8211; \u0110\u1eb7t c\u1eaft l\u1ebb theo b\u1ea3n v\u1ebd \u0111\u1ec3 gi\u1ea3m ph\u00ed gia c\u00f4ng h\u1eadu k\u1ef3 v\u00e0 ph\u1ebf li\u1ec7u.<br \/>\n&#8211; Ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng:<br \/>\n  &#8211; Y\u00eau c\u1ea7u ch\u1ee9ng ch\u1ec9 v\u1eadt li\u1ec7u (MTC) theo ASTM A240\/JIS; ki\u1ec3m tra m\u00e1c b\u1eb1ng s\u00fang XRF khi h\u1ea1ng m\u1ee5c quan tr\u1ecdng.<br \/>\n  &#8211; \u0110\u1eebng d\u1ef1a v\u00e0o \u201cth\u1eed nam ch\u00e2m\u201d \u0111\u1ec3 ph\u00e2n bi\u1ec7t 201\/304 \u2013 304 c\u00f3 th\u1ec3 h\u01a1i h\u00fat sau c\u00e1n\/\u0111\u1ecbnh h\u00ecnh.<br \/>\n  &#8211; B\u1ea3o qu\u1ea3n kh\u00f4, c\u00f3 m\u00e0ng PE; tr\u00e1nh x\u1ebfp ch\u1ed3ng l\u1eabn v\u1edbi th\u00e9p carbon g\u00e2y nhi\u1ec5m b\u1ea9n s\u1eaft t\u1ef1 do.<\/p>\n<h2 id=\"toc-8-case-study-rut-gon-voi-so-lieu-dinh-huong\">Case study r\u00fat g\u1ecdn v\u1edbi s\u1ed1 li\u1ec7u \u0111\u1ecbnh h\u01b0\u1edbng<\/h2>\n<h3>1) Lan can trong nh\u00e0 x\u01b0\u1edfng (kh\u00f4ng chloride)<\/h3>\n<p>&#8211; Ph\u01b0\u01a1ng \u00e1n A: 304 No.4, \u1ed1ng \u00d838 d\u00e0y 1,5 mm.<br \/>\n&#8211; Ph\u01b0\u01a1ng \u00e1n B: 430 No.4, \u1ed1ng \u00d838 d\u00e0y 1,5 mm; bulong 304.<br \/>\n&#8211; K\u1ebft qu\u1ea3: B gi\u1ea3m ~25\u201330% v\u1eadt li\u1ec7u, thi c\u00f4ng t\u01b0\u01a1ng \u0111\u01b0\u01a1ng; y\u00eau c\u1ea7u r\u1eeda lau \u0111\u1ecbnh k\u1ef3. \u0110\u1ed9 b\u1ec1n trong nh\u00e0 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng 304.<\/p>\n<h3>2) B\u00e0n b\u1ebfp c\u00f4ng nghi\u1ec7p<\/h3>\n<p>&#8211; Ph\u01b0\u01a1ng \u00e1n A: 304 t\u1ea5m 1,5 mm, No.4.<br \/>\n&#8211; Ph\u01b0\u01a1ng \u00e1n t\u1ed1i \u01b0u: 304 t\u1ea5m 1,2 mm + g\u00e2n t\u0103ng c\u1ee9ng + 2B m\u1eb7t d\u01b0\u1edbi, No.4 m\u1eb7t tr\u00ean.<br \/>\n&#8211; K\u1ebft qu\u1ea3: gi\u1ea3m ~12\u201318% kh\u1ed1i l\u01b0\u1ee3ng inox, \u0111\u1ed9 c\u1ee9ng t\u01b0\u01a1ng \u0111\u01b0\u01a1ng, \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u v\u1ec7 sinh.<\/p>\n<h3>3) H\u1ec7 khung bi\u1ec3n qu\u1ea3ng c\u00e1o ngo\u00e0i tr\u1eddi (\u0111\u00f4 th\u1ecb)<\/h3>\n<p>&#8211; Ph\u01b0\u01a1ng \u00e1n A: to\u00e0n b\u1ed9 304, bulong 304.<br \/>\n&#8211; Ph\u01b0\u01a1ng \u00e1n t\u1ed1i \u01b0u: th\u00e2n 304; bulong, ch\u00e2n \u0111\u1ebf, khu v\u1ef1c phun n\u01b0\u1edbc m\u01b0a d\u00f9ng 316; thi\u1ebft k\u1ebf tho\u00e1t n\u01b0\u1edbc \u1edf g\u00e2n.<br \/>\n&#8211; K\u1ebft qu\u1ea3: gi\u1ea3m ~10\u201315% chi ph\u00ed so v\u1edbi \u201call-316\u201d, h\u1ea1n ch\u1ebf han \u1ed1 \u1edf \u0111i\u1ec3m nh\u1ea1y c\u1ea3m.<\/p>\n<h2 id=\"toc-9-10-buoc-trien-khai-du-an-inox-ngan-sach-thap\">10 b\u01b0\u1edbc tri\u1ec3n khai d\u1ef1 \u00e1n inox ng\u00e2n s\u00e1ch th\u1ea5p<\/h2>\n<p>1) X\u00e1c \u0111\u1ecbnh m\u00f4i tr\u01b0\u1eddng v\u00e0 r\u1ee7i ro chloride th\u1ef1c t\u1ebf.<br \/>\n2) Ch\u1ecdn m\u00e1c t\u1ed1i thi\u1ec3u \u0111\u00e1p \u1ee9ng; ch\u1ec9 n\u00e2ng m\u00e1c \u1edf v\u1ecb tr\u00ed nh\u1ea1y c\u1ea3m.<br \/>\n3) T\u1ed1i \u01b0u \u0111\u1ed9 d\u00e0y b\u1eb1ng g\u00e2n\/s\u01b0\u1eddn, nh\u1ecbp \u0111\u1ee1.<br \/>\n4) Ch\u1ecdn b\u1ec1 m\u1eb7t theo nhu c\u1ea7u th\u1ef1c s\u1ef1 (2B\/No.4 thay v\u00ec BA\/Mirror).<br \/>\n5) Thi\u1ebft k\u1ebf ch\u1ed1ng k\u1ebd h\u1edf, tho\u00e1t n\u01b0\u1edbc, c\u00f4 l\u1eadp kim lo\u1ea1i kh\u00e1c nhau.<br \/>\n6) Chu\u1ea9n h\u00f3a chi ti\u1ebft theo kh\u1ed5 t\u1ea5m\/\u1ed1ng ti\u00eau chu\u1ea9n \u0111\u1ec3 gi\u1ea3m ph\u1ebf.<br \/>\n7) L\u1eadp quy tr\u00ecnh h\u00e0n ph\u00f9 h\u1ee3p m\u00e1c; \u01b0u ti\u00ean 304L khi h\u00e0n nhi\u1ec1u.<br \/>\n8) \u0110\u1eb7t c\u1eaft theo nesting; t\u1eadn d\u1ee5ng h\u00e0ng t\u1ed3n\/kh\u1ed5 l\u1ebb \u0111\u1ea1t chu\u1ea9n.<br \/>\n9) Y\u00eau c\u1ea7u MTC, ki\u1ec3m tra m\u00e1c ng\u1eabu nhi\u00ean b\u1eb1ng XRF cho h\u1ea1ng m\u1ee5c quan tr\u1ecdng.<br \/>\n10) L\u1eadp k\u1ebf ho\u1ea1ch r\u1eeda\/b\u1ea3o tr\u00ec t\u1ed1i thi\u1ec3u, \u0111\u1eb7c bi\u1ec7t ngo\u00e0i tr\u1eddi.<\/p>\n<h2 id=\"toc-10-loi-thuong-gap-khien-doi-du-an-dat-gap-doi\">L\u1ed7i th\u01b0\u1eddng g\u1eb7p khi\u1ebfn \u0111\u1ed9i d\u1ef1 \u00e1n \u201c\u0111\u1eaft g\u1ea5p \u0111\u00f4i\u201d<\/h2>\n<p>&#8211; D\u00f9ng 201 ngo\u00e0i tr\u1eddi ven bi\u1ec3n ho\u1eb7c g\u1ea7n b\u1ec3 clo.<br \/>\n&#8211; Pha tr\u1ed9n \u1ed1c th\u00e9p \u0111en v\u1edbi inox g\u00e2y g\u1ec9 lan.<br \/>\n&#8211; Kh\u00f4ng th\u1ee5 \u0111\u1ed9ng h\u00f3a sau h\u00e0n trong m\u00f4i tr\u01b0\u1eddng \u1ea9m\/\u0103n m\u00f2n.<br \/>\n&#8211; Over-spec g\u01b0\u01a1ng No.8 cho m\u1eb7t khu\u1ea5t; under-spec kh\u00f4ng g\u00e2n t\u0103ng c\u1ee9ng khi\u1ebfn ph\u1ea3i t\u0103ng d\u00e0y t\u1ea5m.<br \/>\n&#8211; Tin v\u00e0o \u201ckh\u00f4ng h\u00fat nam ch\u00e2m l\u00e0 304\u201d: d\u1eabn t\u1edbi mua nh\u1ea7m m\u00e1c.<\/p>\n<h2 id=\"toc-11-tinh-nhanh-chi-phi-vong-doi-uoc-luong-hien-truong\">T\u00ednh nhanh chi ph\u00ed v\u00f2ng \u0111\u1eddi (\u01b0\u1edbc l\u01b0\u1ee3ng hi\u1ec7n tr\u01b0\u1eddng)<\/h2>\n<p>&#8211; B\u01b0\u1edbc 1: T\u00ednh kg inox = di\u1ec7n t\u00edch x chi\u1ec1u d\u00e0y x kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang (\u22488,0 g\/cm\u00b3) x h\u1ec7 s\u1ed1 t\u1ed5n hao.<br \/>\n&#8211; B\u01b0\u1edbc 2: Gi\u00e1 v\u1eadt li\u1ec7u = kg x \u0111\u01a1n gi\u00e1 theo m\u00e1c (d\u00f9ng ch\u1ec9 s\u1ed1 so v\u1edbi 304).<br \/>\n&#8211; B\u01b0\u1edbc 3: Gia c\u00f4ng = gi\u1edd c\u00f4ng x \u0111\u01a1n gi\u00e1 theo quy tr\u00ecnh (laser\/h\u00e0n\/\u0111\u00e1nh b\u00f3ng).<br \/>\n&#8211; B\u01b0\u1edbc 4: B\u1ea3o tr\u00ec n\u0103m = t\u1ea7n su\u1ea5t r\u1eeda x nh\u00e2n c\u00f4ng + v\u1eadt t\u01b0.<br \/>\n&#8211; B\u01b0\u1edbc 5: So s\u00e1nh ph\u01b0\u01a1ng \u00e1n \u1edf 3\u20135 n\u0103m. Th\u01b0\u1eddng 316 c\u1ee5c b\u1ed9 + 304 th\u00e2n s\u1ebd r\u1ebb h\u01a1n 100% 316, v\u00e0 304 m\u1ecfng + g\u00e2n r\u1ebb h\u01a1n 201 d\u00e0y kh\u00f4ng g\u00e2n.<\/p>\n<h2 id=\"toc-12-khi-nao-nen-chiu-chi-mac-cao-hon\">Khi n\u00e0o n\u00ean \u201cch\u1ecbu chi\u201d m\u00e1c cao h\u01a1n?<\/h2>\n<p>&#8211; Ti\u1ebfp x\u00fac chloride li\u00ean t\u1ee5c, phun s\u01b0\u01a1ng mu\u1ed1i, h\u00f3a ch\u1ea5t t\u1ea9y r\u1eeda clo.<br \/>\n&#8211; H\u1ea1ng m\u1ee5c an to\u00e0n s\u1ed1ng c\u00f2n (lan can c\u00f4ng c\u1ed9ng ngo\u00e0i bi\u1ec3n, bu l\u00f4ng neo).<br \/>\n&#8211; Kh\u00f3 ti\u1ebfp c\u1eadn \u0111\u1ec3 b\u1ea3o tr\u00ec\/r\u1eeda \u0111\u1ecbnh k\u1ef3.<\/p>\n<h2 id=\"toc-13-ket-luan\">K\u1ebft lu\u1eadn<\/h2>\n<p>T\u1ed1i \u01b0u chi ph\u00ed inox cho d\u1ef1 \u00e1n ng\u00e2n s\u00e1ch th\u1ea5p kh\u00f4ng ph\u1ea3i l\u00e0 \u201ch\u1ea1 m\u00e1c b\u1eb1ng m\u1ecdi gi\u00e1\u201d, m\u00e0 l\u00e0 ph\u1ed1i h\u1ee3p b\u1ed1n \u0111\u00f2n b\u1ea9y: ch\u1ecdn \u0111\u00fang m\u00e1c theo m\u00f4i tr\u01b0\u1eddng, gi\u1ea3m \u0111\u1ed9 d\u00e0y b\u1eb1ng t\u0103ng c\u1ee9ng, ch\u1ec9 \u0111\u1ecbnh b\u1ec1 m\u1eb7t \u201c\u0111\u1ee7 d\u00f9ng\u201d, v\u00e0 thi\u1ebft k\u1ebf ch\u1ed1ng \u0103n m\u00f2n. V\u1edbi ma tr\u1eadn 201\/304\/430\/316 c\u00f9ng c\u00e1c m\u1eb9o gia c\u00f4ng \u2013 mua h\u00e0ng t\u1ea1i H\u00e0 N\u1ed9i, b\u1ea1n c\u00f3 th\u1ec3 c\u1eaft 15\u201330% CAPEX v\u00e0 10\u201320% OPEX m\u00e0 v\u1eabn \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 b\u1ec1n v\u00e0 an to\u00e0n. H\u00e3y b\u1eaft \u0111\u1ea7u b\u1eb1ng vi\u1ec7c x\u00e1c \u0111\u1ecbnh m\u00f4i tr\u01b0\u1eddng, chu\u1ea9n h\u00f3a quy c\u00e1ch theo kh\u1ed5 t\u1ea5m, t\u1ed1i \u01b0u g\u00e2n\/s\u01b0\u1eddn, v\u00e0 n\u00e2ng m\u00e1c c\u1ee5c b\u1ed9 \u1edf \u0111i\u1ec3m nh\u1ea1y c\u1ea3m \u2013 \u0111\u00f3 l\u00e0 con \u0111\u01b0\u1eddng ng\u1eafn nh\u1ea5t \u0111\u1ec3 \u0111\u1ea1t m\u1ee5c ti\u00eau chi ph\u00ed m\u00e0 kh\u00f4ng hy sinh ch\u1ea5t l\u01b0\u1ee3ng.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>H\u01b0\u1edbng d\u1eabn ch\u1ecdn m\u00e1c, \u0111\u1ed9 d\u00e0y, b\u1ec1 m\u1eb7t v\u00e0 gia c\u00f4ng \u0111\u1ec3 gi\u1ea3m 15\u201330% chi ph\u00ed inox cho d\u1ef1 \u00e1n ng\u00e2n s\u00e1ch th\u1ea5p, v\u1eabn \u0111\u1ea3m b\u1ea3o b\u1ec1n, an to\u00e0n v\u00e0 ti\u00eau chu\u1ea9n.<\/p>\n","protected":false},"author":7,"featured_media":1015,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-1153","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\/1153","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=1153"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/1153\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1015"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=1153"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=1153"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=1153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}