{"id":1155,"date":"2025-10-07T12:34:27","date_gmt":"2025-10-07T05:34:27","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/phan-tich-chi-phi-ban-dau-vs-chi-phi-vong-doi-inox-dai-han\/"},"modified":"2025-10-07T12:34:27","modified_gmt":"2025-10-07T05:34:27","slug":"phan-tich-chi-phi-ban-dau-vs-chi-phi-vong-doi-inox-dai-han","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/phan-tich-chi-phi-ban-dau-vs-chi-phi-vong-doi-inox-dai-han\/","title":{"rendered":"Ph\u00e2n t\u00edch chi ph\u00ed ban \u0111\u1ea7u vs chi ph\u00ed v\u00f2ng \u0111\u1eddi Inox d\u00e0i h\u1ea1n"},"content":{"rendered":"<div class=\"custom-toc\">\n<h3>N\u1ed9i dung ch\u00ednh<\/h3>\n<ul>\n<li><a href=\"#toc-0-vi-sao-phai-phan-tich-chi-phi-vong-doi-lcc-thay-vi\">V\u00ec sao ph\u1ea3i ph\u00e2n t\u00edch chi ph\u00ed v\u00f2ng \u0111\u1eddi (LCC) thay v\u00ec ch\u1ec9 nh\u00ecn CapEx?<\/a><\/li>\n<li><a href=\"#toc-1-mo-hinh-tinh-lcc-don-gian-va-thuc-dung\">M\u00f4 h\u00ecnh t\u00ednh LCC \u0111\u01a1n gi\u1ea3n v\u00e0 th\u1ef1c d\u1ee5ng<\/a><\/li>\n<li><a href=\"#toc-2-nhung-yeu-to-chi-phoi-lcc-cua-inox\">Nh\u1eefng y\u1ebfu t\u1ed1 chi ph\u1ed1i LCC c\u1ee7a inox<\/a><\/li>\n<li><a href=\"#toc-3-gia-thi-truong-inox-tai-viet-nam-tham-khao\">Gi\u00e1 th\u1ecb tr\u01b0\u1eddng inox t\u1ea1i Vi\u1ec7t Nam (tham kh\u1ea3o)<\/a><\/li>\n<li><a href=\"#toc-4-vi-du-thuc-te-so-sanh-lcc-co-so-lieu\">V\u00ed d\u1ee5 th\u1ef1c t\u1ebf: So s\u00e1nh LCC c\u00f3 s\u1ed1 li\u1ec7u<\/a><\/li>\n<li><a href=\"#toc-5-do-nhay-va-nguong-quyet-dinh-theo-moi-truong-viet-\">\u0110\u1ed9 nh\u1ea1y v\u00e0 ng\u01b0\u1ee1ng quy\u1ebft \u0111\u1ecbnh theo m\u00f4i tr\u01b0\u1eddng Vi\u1ec7t Nam<\/a><\/li>\n<li><a href=\"#toc-6-checklist-du-lieu-can-thu-thap-truoc-khi-tinh-lcc\">Checklist d\u1eef li\u1ec7u c\u1ea7n thu th\u1eadp tr\u01b0\u1edbc khi t\u00ednh LCC<\/a><\/li>\n<li><a href=\"#toc-7-meo-giam-lcc-ma-khong-nhat-thiet-phai-nang-mac\">M\u1eb9o gi\u1ea3m LCC m\u00e0 kh\u00f4ng nh\u1ea5t thi\u1ebft ph\u1ea3i n\u00e2ng m\u00e1c<\/a><\/li>\n<li><a href=\"#toc-8-sai-lam-pho-bien-lam-doi-chi-phi-vong-doi\">Sai l\u1ea7m ph\u1ed5 bi\u1ebfn l\u00e0m \u0111\u1ed9i chi ph\u00ed v\u00f2ng \u0111\u1eddi<\/a><\/li>\n<li><a href=\"#toc-9-quy-trinh-5-buoc-ra-quyet-dinh-dau-tu-inox-dai-han\">Quy tr\u00ecnh 5 b\u01b0\u1edbc ra quy\u1ebft \u0111\u1ecbnh \u0111\u1ea7u t\u01b0 inox d\u00e0i h\u1ea1n<\/a><\/li>\n<li><a href=\"#toc-10-khuyen-nghi-nhanh-theo-ung-dung-pho-bien\">Khuy\u1ebfn ngh\u1ecb nhanh theo \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn<\/a><\/li>\n<li><a href=\"#toc-11-goi-y-khi-mua-hang-de-bao-ve-lcc\">G\u1ee3i \u00fd khi mua h\u00e0ng \u0111\u1ec3 b\u1ea3o v\u1ec7 LCC<\/a><\/li>\n<li><a href=\"#toc-12-ket-luan\">K\u1ebft lu\u1eadn<\/a><\/li>\n<\/ul>\n<\/div>\n<p>\u0110\u1ea7u t\u01b0 inox kh\u00f4ng ch\u1ec9 l\u00e0 c\u00e2u chuy\u1ec7n gi\u00e1 mua ban \u0111\u1ea7u. V\u1edbi h\u1ea7u h\u1ebft \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p v\u00e0 x\u00e2y l\u1eafp t\u1ea1i Vi\u1ec7t Nam, chi ph\u00ed v\u00f2ng \u0111\u1eddi (Life-Cycle Cost \u2013 LCC) m\u1edbi quy\u1ebft \u0111\u1ecbnh hi\u1ec7u qu\u1ea3 d\u00e0i h\u1ea1n: b\u1ea3o tr\u00ec, thay th\u1ebf, d\u1eebng m\u00e1y, r\u1ee7i ro \u0103n m\u00f2n v\u00e0 gi\u00e1 tr\u1ecb thu h\u1ed3i. B\u00e0i vi\u1ebft n\u00e0y l\u00e0 h\u01b0\u1edbng d\u1eabn \u0111\u1ea7y \u0111\u1ee7 \u0111\u1ec3 b\u1ea1n t\u00ednh v\u00e0 t\u1ed1i \u01b0u LCC cho inox theo m\u00f4i tr\u01b0\u1eddng, m\u1ee5c \u0111\u00edch v\u00e0 ng\u00e2n s\u00e1ch.<\/p>\n<h2 id=\"toc-0-vi-sao-phai-phan-tich-chi-phi-vong-doi-lcc-thay-vi\">V\u00ec sao ph\u1ea3i ph\u00e2n t\u00edch chi ph\u00ed v\u00f2ng \u0111\u1eddi (LCC) thay v\u00ec ch\u1ec9 nh\u00ecn CapEx?<\/h2>\n<p>&#8211; CapEx (chi ph\u00ed ban \u0111\u1ea7u): v\u1eadt t\u01b0, gia c\u00f4ng, l\u1eafp \u0111\u1eb7t, ki\u1ec3m \u0111\u1ecbnh.<br \/>\n&#8211; OpEx (chi ph\u00ed v\u1eadn h\u00e0nh\/b\u1ea3o tr\u00ec): v\u1ec7 sinh, passivation \u0111\u1ecbnh k\u1ef3, s\u1eeda ch\u1eefa, ti\u00eau hao h\u00f3a ch\u1ea5t.<br \/>\n&#8211; Chi ph\u00ed r\u1ee7i ro: d\u1eebng m\u00e1y, ph\u1ebf ph\u1ea9m, vi ph\u1ea1m an to\u00e0n\/hygiene.<br \/>\n&#8211; Chi ph\u00ed thay th\u1ebf\/\u0111\u1ea1i tu: thay h\u1ea1ng m\u1ee5c h\u01b0 h\u1ecfng do \u0103n m\u00f2n\/k\u1ebd h\u1edf.<br \/>\n&#8211; Gi\u00e1 tr\u1ecb thu h\u1ed3i: inox c\u00f3 th\u1ec3 thu h\u1ed3i 55\u201370% gi\u00e1 tr\u1ecb v\u1eadt li\u1ec7u khi th\u1ea3i b\u1ecf.<\/p>\n<p>Kh\u00e1c bi\u1ec7t v\u00e0i ch\u1ee5c ph\u1ea7n tr\u0103m \u1edf CapEx th\u01b0\u1eddng b\u1ecb \u201cnu\u1ed1t ch\u1eedng\u201d b\u1edfi chi ph\u00ed \u0103n m\u00f2n, d\u1eebng m\u00e1y v\u00e0 thay th\u1ebf sau 5\u201310 n\u0103m, \u0111\u1eb7c bi\u1ec7t \u1edf m\u00f4i tr\u01b0\u1eddng ven bi\u1ec3n, h\u00f3a ch\u1ea5t ho\u1eb7c nhi\u1ec7t \u0111\u1ed9 cao.<\/p>\n<h2 id=\"toc-1-mo-hinh-tinh-lcc-don-gian-va-thuc-dung\">M\u00f4 h\u00ecnh t\u00ednh LCC \u0111\u01a1n gi\u1ea3n v\u00e0 th\u1ef1c d\u1ee5ng<\/h2>\n<p>&#8211; LCC (gi\u00e1 tr\u1ecb hi\u1ec7n t\u1ea1i) = CapEx + t\u1ed5ng chi ph\u00ed b\u1ea3o tr\u00ec h\u00e0ng n\u0103m (chi\u1ebft kh\u1ea5u) + chi ph\u00ed thay th\u1ebf (chi\u1ebft kh\u1ea5u) + chi ph\u00ed d\u1eebng m\u00e1y (chi\u1ebft kh\u1ea5u) \u2013 gi\u00e1 tr\u1ecb thu h\u1ed3i (chi\u1ebft kh\u1ea5u).<br \/>\n&#8211; D\u00f9ng su\u1ea5t chi\u1ebft kh\u1ea5u 8\u201312%\/n\u0103m (ph\u1ed5 bi\u1ebfn v\u1edbi d\u1ef1 \u00e1n c\u00f4ng nghi\u1ec7p Vi\u1ec7t Nam).<br \/>\n&#8211; Chu k\u1ef3 \u0111\u00e1nh gi\u00e1 10\u201320 n\u0103m t\u00f9y tu\u1ed5i th\u1ecd y\u00eau c\u1ea7u.<\/p>\n<p>G\u1ee3i \u00fd: t\u00ednh 2 k\u1ecbch b\u1ea3n \u201cb\u1ea3o th\u1ee7\u201d v\u00e0 \u201ckh\u1eafc nghi\u1ec7t\u201d \u0111\u1ec3 th\u1ea5y \u0111\u1ed9 nh\u1ea1y v\u1edbi m\u00f4i tr\u01b0\u1eddng.<\/p>\n<h2 id=\"toc-2-nhung-yeu-to-chi-phoi-lcc-cua-inox\">Nh\u1eefng y\u1ebfu t\u1ed1 chi ph\u1ed1i LCC c\u1ee7a inox<\/h2>\n<h3>1) M\u00f4i tr\u01b0\u1eddng<\/h3>\n<p>&#8211; Ven bi\u1ec3n \u22645 km (H\u1ea3i Ph\u00f2ng, \u0110\u00e0 N\u1eb5ng, Nha Trang): clorua cao, s\u01b0\u01a1ng mu\u1ed1i; 304 d\u1ec5 b\u1ecb r\u1ed7 (pitting), 316L\/duplex hi\u1ec7u qu\u1ea3 h\u01a1n.<br \/>\n&#8211; \u0110\u00f4 th\u1ecb \u00f4 nhi\u1ec5m (H\u00e0 N\u1ed9i, TP.HCM): m\u01b0a axit, SO2\/NOx; khe h\u1edf, b\u1ec1 m\u1eb7t nh\u00e1m d\u1ec5 \u1ed1.<br \/>\n&#8211; Th\u1ef1c ph\u1ea9m\/\u0111\u1ed3 u\u1ed1ng: v\u1ec7 sinh CIP, clo\/halogen, nhi\u1ec7t; y\u00eau c\u1ea7u v\u1ec7 sinh v\u00e0 th\u1eddi gian d\u1eebng m\u00e1y nghi\u00eam ng\u1eb7t.<br \/>\n&#8211; H\u00f3a ch\u1ea5t\/\u0111\u1ed9 pH\/ nhi\u1ec7t \u0111\u1ed9: clorua + nhi\u1ec7t \u0111\u1ed9 cao l\u00e0m pitting t\u0103ng m\u1ea1nh.<\/p>\n<h3>2) L\u1ef1a ch\u1ecdn m\u00e1c &#038; b\u1ec1 m\u1eb7t<\/h3>\n<p>&#8211; 201\/430: r\u1ebb, ch\u1ed1ng \u0103n m\u00f2n h\u1ea1n ch\u1ebf; ph\u00f9 h\u1ee3p n\u1ed9i th\u1ea5t kh\u00f4.<br \/>\n&#8211; 304 (EN 1.4301): ph\u1ed5 bi\u1ebfn, \u0111a d\u1ee5ng; PREN ~18\u201319.<br \/>\n&#8211; 316\/316L (EN 1.4401\/1.4404): c\u00f3 Mo, ch\u1ed1ng pitting t\u1ed1t h\u01a1n; PREN ~24\u201326.<br \/>\n&#8211; Duplex 2205 (EN 1.4462): PREN ~35; v\u01b0\u1ee3t tr\u1ed9i trong clorua cao.<br \/>\n&#8211; B\u1ec1 m\u1eb7t 2B\/BA \u00edt b\u00e1m b\u1ea9n h\u01a1n No.4\/HL; \u0111\u00e1nh b\u00f3ng t\u1ed1t gi\u1ea3m t\u00edch mu\u1ed1i.<br \/>\n&#8211; PREN tham kh\u1ea3o nhanh: PREN = Cr% + 3.3\u00d7Mo% + 16\u00d7N%.<\/p>\n<h3>3) Thi\u1ebft k\u1ebf &#038; ch\u1ebf t\u1ea1o<\/h3>\n<p>&#8211; Tr\u00e1nh b\u1eaby n\u01b0\u1edbc\/khe h\u1edf; \u0111\u1ea3m b\u1ea3o tho\u00e1t n\u01b0\u1edbc.<br \/>\n&#8211; H\u00e0n \u0111\u00fang v\u1eadt li\u1ec7u b\u1ed5 sung (308L cho 304; 316L cho 316L; 2209 cho 2205).<br \/>\n&#8211; T\u1ea9y g\u1ec9 \u2013 th\u1ee5 \u0111\u1ed9ng h\u00f3a theo ASTM A380\/A967 sau h\u00e0n.<br \/>\n&#8211; C\u00e1ch ly \u0111i\u1ec7n gi\u1eefa inox v\u00e0 th\u00e9p carbon \u0111\u1ec3 tr\u00e1nh \u0103n m\u00f2n \u0111i\u1ec7n h\u00f3a.<br \/>\n&#8211; Ch\u1ecdn \u0111\u1ed9 d\u00e0y \u0111\u1ee7 d\u1ef1 ph\u00f2ng \u0103n m\u00f2n\/va \u0111\u1eadp.<\/p>\n<h3>4) Duy tu &#038; v\u1eadn h\u00e0nh<\/h3>\n<p>&#8211; L\u1ecbch v\u1ec7 sinh ph\u00f9 h\u1ee3p m\u00f4i tr\u01b0\u1eddng; h\u00f3a ch\u1ea5t kh\u00f4ng ch\u1ee9a clorua v\u1edbi 316L tr\u1edf xu\u1ed1ng.<br \/>\n&#8211; Ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3 \u0111i\u1ec3m r\u1ed7, v\u1ebft n\u1ee9t \u1ee9ng su\u1ea5t.<br \/>\n&#8211; Qu\u1ea3n tr\u1ecb t\u1ed3n kho v\u1eadt t\u01b0 thay th\u1ebf \u0111\u1ec3 r\u00fat ng\u1eafn d\u1eebng m\u00e1y.<\/p>\n<h2 id=\"toc-3-gia-thi-truong-inox-tai-viet-nam-tham-khao\">Gi\u00e1 th\u1ecb tr\u01b0\u1eddng inox t\u1ea1i Vi\u1ec7t Nam (tham kh\u1ea3o)<\/h2>\n<p>Gi\u00e1 bi\u1ebfn \u0111\u1ed9ng theo niken, t\u1ec9 gi\u00e1, ngu\u1ed3n g\u1ed1c; ph\u1ea1m vi \u0111i\u1ec3n h\u00ecnh Q4\/2024\u2013Q3\/2025:<br \/>\n&#8211; SUS 201: 35.000\u201345.000 VND\/kg<br \/>\n&#8211; SUS 430: 45.000\u201355.000 VND\/kg<br \/>\n&#8211; SUS 304\/304L: 55.000\u201375.000 VND\/kg<br \/>\n&#8211; SUS 316\/316L: 80.000\u2013110.000 VND\/kg<br \/>\n&#8211; Duplex 2205: 120.000\u2013160.000 VND\/kg<br \/>\nL\u01b0u \u00fd c\u1ed9ng th\u00eam chi ph\u00ed gia c\u00f4ng, l\u1eafp \u0111\u1eb7t, v\u1eadn chuy\u1ec3n, VAT.<\/p>\n<h2 id=\"toc-4-vi-du-thuc-te-so-sanh-lcc-co-so-lieu\">V\u00ed d\u1ee5 th\u1ef1c t\u1ebf: So s\u00e1nh LCC c\u00f3 s\u1ed1 li\u1ec7u<\/h2>\n<p>C\u00e1c gi\u1ea3 \u0111\u1ecbnh ch\u1ec9 nh\u1eb1m minh h\u1ecda ph\u01b0\u01a1ng ph\u00e1p; h\u00e3y thay b\u1eb1ng s\u1ed1 li\u1ec7u c\u00f4ng tr\u01b0\u1eddng c\u1ee7a b\u1ea1n.<\/p>\n<h3>Case A: Lan can ngo\u00e0i tr\u1eddi t\u1ea1i khu ven bi\u1ec3n (100 m, \u01b0\u1edbc 500 kg)<\/h3>\n<p>Gi\u1ea3 \u0111\u1ecbnh:<br \/>\n&#8211; \u0110\u01a1n gi\u00e1 v\u1eadt li\u1ec7u: 201=40k; 304=65k; 316L=95k (VND\/kg).<br \/>\n&#8211; Gia c\u00f4ng: 50.000 VND\/kg; l\u1eafp \u0111\u1eb7t: 150.000 VND\/m.<br \/>\n&#8211; V\u1ec7 sinh: 1,2 tri\u1ec7u\/l\u1ea7n; 201=3 l\u1ea7n\/n\u0103m; 304=2; 316L=1.<br \/>\n&#8211; Thay th\u1ebf: 201 thay m\u1edbi sau 8 n\u0103m; 304 thay 30% sau 10 n\u0103m; 316L kh\u00f4ng thay trong 15 n\u0103m.<br \/>\n&#8211; T\u1ef7 l\u1ec7 thu h\u1ed3i ph\u1ebf li\u1ec7u: 60% gi\u00e1 tr\u1ecb v\u1eadt li\u1ec7u.<br \/>\n&#8211; Su\u1ea5t chi\u1ebft kh\u1ea5u: 10%; chu k\u1ef3 15 n\u0103m.<\/p>\n<p>T\u00ednh nhanh:<br \/>\n&#8211; CapEx ban \u0111\u1ea7u (tri\u1ec7u VND):<br \/>\n  &#8211; 201 \u2248 60; 304 \u2248 72,5; 316L \u2248 87,5<br \/>\n&#8211; PV b\u1ea3o tr\u00ec 15 n\u0103m:<br \/>\n  &#8211; 201 \u2248 27,4; 304 \u2248 18,3; 316L \u2248 9,1<br \/>\n&#8211; PV thay th\u1ebf:<br \/>\n  &#8211; 201 \u2248 14,0 (thay n\u0103m 8, \u0111\u00e3 tr\u1eeb thu h\u1ed3i);<br \/>\n  &#8211; 304 \u2248 6,1 (30% thay n\u0103m 10);<br \/>\n  &#8211; 316L = 0<br \/>\n&#8211; LCC (NPV, tri\u1ec7u VND):<br \/>\n  &#8211; 201 \u2248 101,4<br \/>\n  &#8211; 304 \u2248 96,9<br \/>\n  &#8211; 316L \u2248 96,6<\/p>\n<p>K\u1ebft lu\u1eadn Case A: 316L cho LCC th\u1ea5p nh\u1ea5t, 304 b\u00e1m s\u00e1t; 201 r\u1ebb l\u00fac \u0111\u1ea7u nh\u01b0ng \u0111\u1eaft v\u1ec1 l\u00e2u d\u00e0i. N\u1ebfu m\u00f4i tr\u01b0\u1eddng m\u1eb7n kh\u1eafc nghi\u1ec7t h\u01a1n (phun s\u01b0\u01a1ng bi\u1ec3n tr\u1ef1c ti\u1ebfp), 304 s\u1ebd ph\u1ea3i thay s\u1edbm h\u01a1n v\u00e0 316L v\u01b0\u1ee3t tr\u1ed9i r\u00f5 r\u1ec7t.<\/p>\n<h3>Case B: B\u1ed3n tr\u1ed9n th\u1ef1c ph\u1ea9m 5 m\u00b3 g\u1ea7n bi\u1ec3n (\u01b0\u1edbc 1.200 kg)<\/h3>\n<p>Gi\u1ea3 \u0111\u1ecbnh:<br \/>\n&#8211; CapEx (tri\u1ec7u VND):<br \/>\n  &#8211; 304 \u2248 178; 316L \u2248 224; 2205 \u2248 298<br \/>\n&#8211; D\u1eebng m\u00e1y do pitting\/vi sinh (\u01b0\u1edbc t\u00ednh kinh t\u1ebf trung b\u00ecnh):<br \/>\n  &#8211; 304: 2 ng\u00e0y\/n\u0103m \u00d7 10 tri\u1ec7u = 20 tri\u1ec7u\/n\u0103m<br \/>\n  &#8211; 316L: 0,5 ng\u00e0y\/n\u0103m = 5 tri\u1ec7u\/n\u0103m<br \/>\n  &#8211; 2205: 0,2 ng\u00e0y\/n\u0103m = 2 tri\u1ec7u\/n\u0103m<br \/>\n&#8211; 304 c\u1ea7n thay sau 10 n\u0103m; 316L\/2205 kh\u00f4ng thay trong 15 n\u0103m.<br \/>\n&#8211; Thu h\u1ed3i ph\u1ebf li\u1ec7u 60% ph\u1ea7n v\u1eadt li\u1ec7u 304 khi thay; su\u1ea5t chi\u1ebft kh\u1ea5u 10%; chu k\u1ef3 15 n\u0103m.<\/p>\n<p>T\u00ednh nhanh:<br \/>\n&#8211; PV b\u1ea3o tr\u00ec\/d\u1eebng m\u00e1y:<br \/>\n  &#8211; 304 \u2248 152; 316L \u2248 38; 2205 \u2248 15<br \/>\n&#8211; PV thay th\u1ebf 304 n\u0103m 10: \u2248 30<br \/>\n&#8211; LCC (NPV, tri\u1ec7u VND):<br \/>\n  &#8211; 304 \u2248 360<br \/>\n  &#8211; 316L \u2248 262<br \/>\n  &#8211; 2205 \u2248 313<\/p>\n<p>K\u1ebft lu\u1eadn Case B: Gi\u00e1 mua 316L cao h\u01a1n 304 kho\u1ea3ng 26% nh\u01b0ng LCC th\u1ea5p h\u01a1n r\u1ea5t nhi\u1ec1u khi chi ph\u00ed d\u1eebng m\u00e1y \u0111\u00e1ng k\u1ec3. N\u1ebfu nh\u00e0 x\u01b0\u1edfng nh\u1ecf, chi ph\u00ed d\u1eebng m\u00e1y th\u1ea5p, h\u00e3y ch\u1ea1y l\u1ea1i m\u00f4 h\u00ecnh \u2013 c\u00f3 th\u1ec3 304 kinh t\u1ebf h\u01a1n. 2205 ph\u00f9 h\u1ee3p quy tr\u00ecnh clorua cao\/nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n n\u1eefa ho\u1eb7c y\u00eau c\u1ea7u tu\u1ed5i th\u1ecd >20 n\u0103m.<\/p>\n<h2 id=\"toc-5-do-nhay-va-nguong-quyet-dinh-theo-moi-truong-viet-\">\u0110\u1ed9 nh\u1ea1y v\u00e0 ng\u01b0\u1ee1ng quy\u1ebft \u0111\u1ecbnh theo m\u00f4i tr\u01b0\u1eddng Vi\u1ec7t Nam<\/h2>\n<p>&#8211; Ngo\u00e0i tr\u1eddi n\u1ed9i \u0111\u1ecba, xa bi\u1ec3n >20 km: 304 th\u01b0\u1eddng c\u00f3 LCC th\u1ea5p nh\u1ea5t; 201\/430 d\u00f9ng cho h\u1ea1ng m\u1ee5c th\u1ea9m m\u1ef9 trong nh\u00e0 kh\u00f4.<br \/>\n&#8211; Ven bi\u1ec3n 5\u201320 km: 316L th\u01b0\u1eddng th\u1eafng 304 v\u1ec1 LCC n\u1ebfu y\u00eau c\u1ea7u tu\u1ed5i th\u1ecd \u226515 n\u0103m v\u00e0 b\u1ea3o tr\u00ec h\u1ea1n ch\u1ebf.<br \/>\n&#8211; Ven bi\u1ec3n <5 km ho\u1eb7c phun s\u01b0\u01a1ng m\u1eb7n tr\u1ef1c ti\u1ebfp: 316L t\u1ed1i thi\u1ec3u; Duplex 2205 \u0111\u00e1ng c\u00e2n nh\u1eafc cho k\u1ebft c\u1ea5u quan tr\u1ecdng, h\u1ea1 t\u1ea7ng bi\u1ec3n.\n- Quy tr\u00ecnh c\u00f3 clorua >200 ppm v\u00e0 T >50\u00b0C: 316L\/2205; tr\u00e1nh 304.<br \/>\n&#8211; Nhi\u1ec7t \u0111\u1ed9 >700\u00b0C: xem x\u00e9t m\u00e1c ch\u1ecbu nhi\u1ec7t nh\u01b0 310S; b\u00e0i to\u00e1n LCC xoay quanh chu k\u1ef3 oxy h\u00f3a v\u00e0 thay th\u1ebf.<\/p>\n<h2 id=\"toc-6-checklist-du-lieu-can-thu-thap-truoc-khi-tinh-lcc\">Checklist d\u1eef li\u1ec7u c\u1ea7n thu th\u1eadp tr\u01b0\u1edbc khi t\u00ednh LCC<\/h2>\n<p>&#8211; Kho\u1ea3ng c\u00e1ch t\u1edbi bi\u1ec3n, n\u1ed3ng \u0111\u1ed9 clorua \u01b0\u1edbc t\u00ednh, t\u1ed1c \u0111\u1ed9 gi\u00f3\/s\u01b0\u01a1ng mu\u1ed1i.<br \/>\n&#8211; Nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh, pH, h\u00f3a ch\u1ea5t (CIP\/kh\u1eed tr\u00f9ng), th\u1eddi gian \u01b0\u1edbt\/kh\u00f4.<br \/>\n&#8211; Y\u00eau c\u1ea7u v\u1ec7 sinh, chi ph\u00ed d\u1eebng m\u00e1y\/ng\u00e0y, chi ph\u00ed ph\u1ebf ph\u1ea9m.<br \/>\n&#8211; Tu\u1ed5i th\u1ecd m\u1ee5c ti\u00eau, m\u1ee9c ch\u1ea5p nh\u1eadn b\u1ea3o tr\u00ec h\u00e0ng n\u0103m.<br \/>\n&#8211; T\u00f9y ch\u1ecdn b\u1ec1 m\u1eb7t (2B\/BA\/No.4\/HL\/8K), \u0111\u1ed9 d\u00e0y, chi ti\u1ebft thi\u1ebft k\u1ebf ch\u1ed1ng \u0111\u1ecdng n\u01b0\u1edbc.<br \/>\n&#8211; Su\u1ea5t chi\u1ebft kh\u1ea5u, l\u1ea1m ph\u00e1t d\u1ef1 t\u00ednh, gi\u00e1 thu h\u1ed3i ph\u1ebf li\u1ec7u.<br \/>\n&#8211; Ti\u00eau chu\u1ea9n v\u1eadt li\u1ec7u &#038; ch\u1ee9ng ch\u1ec9: ASTM A240 (t\u1ea5m), A312 (\u1ed1ng), A554 (\u1ed1ng trang tr\u00ed), MTC 3.1.<\/p>\n<h2 id=\"toc-7-meo-giam-lcc-ma-khong-nhat-thiet-phai-nang-mac\">M\u1eb9o gi\u1ea3m LCC m\u00e0 kh\u00f4ng nh\u1ea5t thi\u1ebft ph\u1ea3i n\u00e2ng m\u00e1c<\/h2>\n<p>&#8211; Thi\u1ebft k\u1ebf tho\u00e1t n\u01b0\u1edbc ho\u00e0n to\u00e0n; b\u1ecbt k\u00edn khe h\u1edf, tr\u00e1nh gh\u00e9p ch\u1ed3ng t\u1ea1o k\u1ebd.<br \/>\n&#8211; Ch\u1ecdn b\u1ec1 m\u1eb7t BA\/2B \u0111\u00e1nh b\u00f3ng nh\u1eb9 \u1edf v\u00f9ng m\u1eb7n gi\u00f3; gi\u1ea3m b\u00e1m mu\u1ed1i.<br \/>\n&#8211; T\u1ea9y g\u1ec9 \u2013 th\u1ee5 \u0111\u1ed9ng h\u00f3a sau h\u00e0n; r\u1eeda s\u1ea1ch clo sau v\u1ec7 sinh.<br \/>\n&#8211; C\u00e1ch \u0111i\u1ec7n bulong\/thanh c\u00e1i gi\u1eefa inox v\u00e0 th\u00e9p carbon; d\u00f9ng bulong 316 trong m\u00f4i tr\u01b0\u1eddng m\u1eb7n.<br \/>\n&#8211; L\u1eadp l\u1ecbch v\u1ec7 sinh \u0111\u1ecbnh k\u1ef3 theo m\u00f9a bi\u1ec3n; t\u0103ng t\u1ea7n su\u1ea5t ng\u1eafn h\u1ea1n r\u1ebb h\u01a1n thay th\u1ebf d\u00e0i h\u1ea1n.<\/p>\n<h2 id=\"toc-8-sai-lam-pho-bien-lam-doi-chi-phi-vong-doi\">Sai l\u1ea7m ph\u1ed5 bi\u1ebfn l\u00e0m \u0111\u1ed9i chi ph\u00ed v\u00f2ng \u0111\u1eddi<\/h2>\n<p>&#8211; Ch\u1ecdn 201\/430 cho ngo\u00e0i tr\u1eddi ven bi\u1ec3n v\u00ec \u201cr\u1ebb tr\u01b0\u1edbc m\u1eaft\u201d.<br \/>\n&#8211; Kh\u00f4ng passivation sau h\u00e0n; \u0111\u1ec3 x\u1ec9, nhi\u1ec7t m\u00e0u t\u1ed3n d\u01b0.<br \/>\n&#8211; D\u00f9ng v\u1eadt li\u1ec7u b\u1ed5 sung h\u00e0n sai m\u00e1c; m\u1ed1i h\u00e0n tr\u1edf th\u00e0nh \u201c\u0111i\u1ec3m y\u1ebfu\u201d.<br \/>\n&#8211; Thi\u1ebft k\u1ebf c\u00f3 b\u1eaby n\u01b0\u1edbc; b\u1ec1 m\u1eb7t No.4 th\u00f4 \u1edf v\u00f9ng mu\u1ed1i.<br \/>\n&#8211; H\u1ed7n h\u1ee3p v\u1eadt li\u1ec7u kh\u00f4ng c\u00e1ch \u0111i\u1ec7n (galvanic) v\u1edbi n\u01b0\u1edbc m\u01b0a l\u00e0m \u0111i\u1ec7n ly.<\/p>\n<h2 id=\"toc-9-quy-trinh-5-buoc-ra-quyet-dinh-dau-tu-inox-dai-han\">Quy tr\u00ecnh 5 b\u01b0\u1edbc ra quy\u1ebft \u0111\u1ecbnh \u0111\u1ea7u t\u01b0 inox d\u00e0i h\u1ea1n<\/h2>\n<p>1) X\u00e1c \u0111\u1ecbnh m\u00f4i tr\u01b0\u1eddng v\u00e0 r\u1ee7i ro \u0103n m\u00f2n \u0111\u1ecbnh l\u01b0\u1ee3ng.<br \/>\n2) R\u00fat g\u1ecdn danh s\u00e1ch m\u00e1c theo PREN, nhi\u1ec7t \u0111\u1ed9, v\u1ec7 sinh.<br \/>\n3) L\u1eadp d\u1ef1 to\u00e1n CapEx chi ti\u1ebft (v\u1eadt li\u1ec7u, gia c\u00f4ng, l\u1eafp \u0111\u1eb7t, ki\u1ec3m \u0111\u1ecbnh).<br \/>\n4) M\u00f4 h\u00ecnh LCC 10\u201320 n\u0103m v\u1edbi 2\u20133 k\u1ecbch b\u1ea3n, c\u1ed9ng chi ph\u00ed d\u1eebng m\u00e1y v\u00e0 thay th\u1ebf; chi\u1ebft kh\u1ea5u 8\u201312%.<br \/>\n5) Ch\u1ea1y ph\u00e2n t\u00edch nh\u1ea1y c\u1ea3m; ch\u1ecdn PA t\u1ed1i \u01b0u LCC, kh\u00f4ng ph\u1ea3i r\u1ebb nh\u1ea5t CapEx.<\/p>\n<h2 id=\"toc-10-khuyen-nghi-nhanh-theo-ung-dung-pho-bien\">Khuy\u1ebfn ngh\u1ecb nhanh theo \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn<\/h2>\n<p>&#8211; Lan can, m\u00e1i che, \u1ed1p ngo\u00e0i tr\u1eddi n\u1ed9i \u0111\u1ecba: 304; ven bi\u1ec3n: 316L.<br \/>\n&#8211; B\u1ed3n\/b\u1ec3, \u1ed1ng th\u1ef1c ph\u1ea9m \u2013 \u0111\u1ed3 u\u1ed1ng: 316L; duplex khi clorua cao ho\u1eb7c y\u00eau c\u1ea7u c\u1ef1c s\u1ea1ch\/tu\u1ed5i th\u1ecd d\u00e0i.<br \/>\n&#8211; Thi\u1ebft b\u1ecb h\u00f3a ch\u1ea5t ch\u1ee9a clorua\/nhi\u1ec7t: 316L\/2205\/904L t\u00f9y n\u1ed3ng \u0111\u1ed9 v\u00e0 T.<br \/>\n&#8211; \u1ed0ng trang tr\u00ed trong nh\u00e0: 201\/430 \u0111\u01b0\u1ee3c, tr\u00e1nh khu \u1ea9m\/m\u1eb7n.<\/p>\n<h2 id=\"toc-11-goi-y-khi-mua-hang-de-bao-ve-lcc\">G\u1ee3i \u00fd khi mua h\u00e0ng \u0111\u1ec3 b\u1ea3o v\u1ec7 LCC<\/h2>\n<p>&#8211; Y\u00eau c\u1ea7u MTC 3.1, m\u00e1c\/ngu\u1ed3n g\u1ed1c r\u00f5 r\u00e0ng, ki\u1ec3m PMI khi c\u1ea7n.<br \/>\n&#8211; Ki\u1ec3m so\u00e1t b\u1ec1 m\u1eb7t v\u00e0 \u0111\u1ed9 d\u00e0y theo ASTM\/EN; th\u1eed mu\u1ed1i s\u01b0\u01a1ng m\u00f9 khi d\u1ef1 \u00e1n ven bi\u1ec3n.<br \/>\n&#8211; Th\u1ecfa thu\u1eadn quy tr\u00ecnh passivation\/\u0111\u00e1nh b\u00f3ng, ti\u00eau chu\u1ea9n v\u1ec7 sinh.<br \/>\n&#8211; B\u1ea3o h\u00e0nh \u0103n m\u00f2n theo m\u00f4i tr\u01b0\u1eddng s\u1eed d\u1ee5ng, k\u00e8m quy tr\u00ecnh b\u1ea3o tr\u00ec.<\/p>\n<h2 id=\"toc-12-ket-luan\">K\u1ebft lu\u1eadn<\/h2>\n<p>&#8211; L\u1ef1a ch\u1ecdn inox theo LCC, kh\u00f4ng ch\u1ec9 CapEx: \u1edf v\u00f9ng m\u1eb7n\/h\u00f3a ch\u1ea5t, 316L v\u00e0 duplex th\u01b0\u1eddng r\u1ebb h\u01a1n v\u1ec1 l\u00e2u d\u00e0i.<br \/>\n&#8211; M\u00f4i tr\u01b0\u1eddng, thi\u1ebft k\u1ebf, ch\u1ebf t\u1ea1o v\u00e0 b\u1ea3o tr\u00ec quy\u1ebft \u0111\u1ecbnh tu\u1ed5i th\u1ecd; sai m\u1ed9t kh\u00e2u, LCC \u0111\u1ed9i l\u00ean nhanh.<br \/>\n&#8211; H\u00e3y m\u00f4 h\u00ecnh h\u00f3a LCC 10\u201320 n\u0103m v\u1edbi chi ph\u00ed d\u1eebng m\u00e1y, thay th\u1ebf v\u00e0 thu h\u1ed3i ph\u1ebf li\u1ec7u. Trong \u0111a s\u1ed1 ca ven bi\u1ec3n, 316L cho LCC th\u1ea5p nh\u1ea5t; trong nh\u00e0 kh\u00f4, 304\/201 c\u00f3 th\u1ec3 \u0111\u1ee7.<br \/>\n&#8211; Chu\u1ea9n h\u00f3a v\u1eadt li\u1ec7u \u2013 quy tr\u00ecnh \u2013 b\u1ea3o tr\u00ec l\u00e0 c\u00e1ch ch\u1eafc ch\u1eafn nh\u1ea5t \u0111\u1ec3 kh\u00f3a chi ph\u00ed v\u00f2ng \u0111\u1eddi v\u00e0 b\u1ea3o v\u1ec7 ROI c\u1ee7a d\u1ef1 \u00e1n inox.<\/p>\n<p>N\u1ebfu c\u1ea7n b\u1ed9 th\u00f4ng s\u1ed1 m\u1eabu \u0111\u1ec3 ch\u1ea1y m\u00f4 h\u00ecnh LCC cho d\u1ef1 \u00e1n t\u1ea1i H\u00e0 N\u1ed9i v\u00e0 c\u00e1c t\u1ec9nh ven bi\u1ec3n, h\u00e3y chu\u1ea9n b\u1ecb d\u1eef li\u1ec7u theo checklist \u1edf tr\u00ean; t\u1eeb \u0111\u00f3 b\u1ea1n s\u1ebd c\u00f3 m\u1ed9t quy\u1ebft \u0111\u1ecbnh \u0111\u1ea7u t\u01b0 inox d\u00e0i h\u1ea1n, t\u1ed1i \u01b0u chi ph\u00ed v\u00e0 r\u1ee7i ro.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hi\u1ec3u r\u00f5 ch\u00eanh l\u1ec7ch CapEx\u2013LCC c\u1ee7a inox theo m\u00f4i tr\u01b0\u1eddng. H\u01b0\u1edbng d\u1eabn t\u00ednh TCO, so s\u00e1nh 201\/304\/316\/2205 v\u00e0 ROI 10\u201320 n\u0103m \u0111\u1ec3 ch\u1ecdn m\u00e1c t\u1ed1i \u01b0u.<\/p>\n","protected":false},"author":7,"featured_media":1070,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-1155","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\/1155","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=1155"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/1155\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1070"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=1155"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=1155"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=1155"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}