{"id":2158,"date":"2026-06-19T00:34:09","date_gmt":"2026-06-18T17:34:09","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/khi-nao-inox-la-lua-chon-can-thiet-cho-ket-cau-chiu-luc\/"},"modified":"2026-06-19T00:34:09","modified_gmt":"2026-06-18T17:34:09","slug":"khi-nao-inox-la-lua-chon-can-thiet-cho-ket-cau-chiu-luc","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/khi-nao-inox-la-lua-chon-can-thiet-cho-ket-cau-chiu-luc\/","title":{"rendered":"Khi n\u00e0o inox l\u00e0 l\u1ef1a ch\u1ecdn c\u1ea7n thi\u1ebft cho k\u1ebft c\u1ea5u ch\u1ecbu l\u1ef1c?"},"content":{"rendered":"<div class=\"custom-toc\">\n<h3>N\u1ed9i dung ch\u00ednh<\/h3>\n<ul>\n<li><a href=\"#toc-0-khi-nao-inox-la-lua-chon-can-thiet-cho-ket-cau-chi\">Khi n\u00e0o inox l\u00e0 l\u1ef1a ch\u1ecdn c\u1ea7n thi\u1ebft cho k\u1ebft c\u1ea5u ch\u1ecbu l\u1ef1c?<\/a><\/li>\n<li><a href=\"#toc-1-chon-mac-inox-theo-muc-do-an-mon-va-tai-trong\">Ch\u1ecdn m\u00e1c inox theo m\u1ee9c \u0111\u1ed9 \u0103n m\u00f2n v\u00e0 t\u1ea3i tr\u1ecdng<\/a><\/li>\n<li><a href=\"#toc-2-dang-san-pham-va-tieu-chuan-nguon-cung-tai-viet-na\">D\u1ea1ng s\u1ea3n ph\u1ea9m v\u00e0 ti\u00eau chu\u1ea9n \u2013 ngu\u1ed3n cung t\u1ea1i Vi\u1ec7t Nam<\/a><\/li>\n<li><a href=\"#toc-3-thiet-ke-ket-cau-inox-khac-gi-so-voi-thep-carbon\">Thi\u1ebft k\u1ebf k\u1ebft c\u1ea5u inox: kh\u00e1c g\u00ec so v\u1edbi th\u00e9p carbon?<\/a><\/li>\n<li><a href=\"#toc-4-chi-phi-vong-doi-vi-du-tinh-nhanh-tham-khao\">Chi ph\u00ed v\u00f2ng \u0111\u1eddi: v\u00ed d\u1ee5 t\u00ednh nhanh (tham kh\u1ea3o)<\/a><\/li>\n<li><a href=\"#toc-5-checklist-ra-quyet-dinh-nhanh\">Checklist ra quy\u1ebft \u0111\u1ecbnh nhanh<\/a><\/li>\n<li><a href=\"#toc-6-luu-y-thi-cong-de-dat-tuoi-tho-thiet-ke\">L\u01b0u \u00fd thi c\u00f4ng \u0111\u1ec3 \u0111\u1ea1t tu\u1ed5i th\u1ecd thi\u1ebft k\u1ebf<\/a><\/li>\n<li><a href=\"#toc-7-vi-du-ung-dung-dien-hinh\">V\u00ed d\u1ee5 \u1ee9ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh<\/a><\/li>\n<li><a href=\"#toc-8-nguon-tham-khao\">Ngu\u1ed3n tham kh\u1ea3o<\/a><\/li>\n<li><a href=\"#toc-9-ket-luan\">K\u1ebft lu\u1eadn<\/a><\/li>\n<\/ul>\n<\/div>\n<p>Inox c\u00f3 ph\u1ea3i l\u00fac n\u00e0o c\u0169ng \u0111\u1eaft v\u00e0 \u201cxa x\u1ec9\u201d cho k\u1ebft c\u1ea5u ch\u1ecbu l\u1ef1c? Kh\u00f4ng. Trong nhi\u1ec1u b\u1ed1i c\u1ea3nh, inox kh\u00f4ng ch\u1ec9 b\u1eaft bu\u1ed9c v\u1ec1 k\u1ef9 thu\u1eadt m\u00e0 c\u00f2n t\u1ed1i \u01b0u v\u1ec1 chi ph\u00ed v\u00f2ng \u0111\u1eddi. B\u00e0i vi\u1ebft n\u00e0y cung c\u1ea5p ti\u00eau ch\u00ed nh\u1eadn di\u1ec7n, ch\u1ecdn m\u00e1c th\u00e9p kh\u00f4ng g\u1ec9 ph\u00f9 h\u1ee3p, l\u01b0u \u00fd thi\u1ebft k\u1ebf\/thi c\u00f4ng v\u00e0 m\u1ed9t v\u00ed d\u1ee5 chi ph\u00ed c\u1ee5 th\u1ec3 \u0111\u1ec3 b\u1ea1n ra quy\u1ebft \u0111\u1ecbnh d\u1ee9t kho\u00e1t.<\/p>\n<h2 id=\"toc-0-khi-nao-inox-la-lua-chon-can-thiet-cho-ket-cau-chi\">Khi n\u00e0o inox l\u00e0 l\u1ef1a ch\u1ecdn c\u1ea7n thi\u1ebft cho k\u1ebft c\u1ea5u ch\u1ecbu l\u1ef1c?<\/h2>\n<h3>M\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n cao (C4\u2013C5\/CX theo ISO 9223)<\/h3>\n<p>&#8211; G\u1ea7n bi\u1ec3n, h\u1ea3i \u0111\u1ea3o, c\u1ea3ng c\u00e1, c\u00f4ng tr\u00ecnh ven bi\u1ec3n (<5 km b\u1edd bi\u1ec3n) ho\u1eb7c v\u00f9ng s\u01b0\u01a1ng mu\u1ed1i, phun s\u00f3ng, n\u01b0\u1edbc l\u1ee3: nguy c\u01a1 \u0103n m\u00f2n r\u1ed7\/k\u1ebd h\u1edf do ion Cl- t\u0103ng v\u1ecdt. S\u01a1n m\u1ea1 tr\u00ean th\u00e9p carbon kh\u00f3 duy tr\u00ec b\u1ec1n v\u1eefng. Inox 316L ho\u1eb7c duplex 2205 th\u01b0\u1eddng l\u00e0 gi\u1ea3i ph\u00e1p b\u1ec1n v\u1eefng h\u01a1n.  \n- Khu v\u1ef1c d\u00f9ng mu\u1ed1i kh\u1eed b\u0103ng, b\u1ec3 b\u01a1i n\u01b0\u1edbc m\u1eb7n, \u0111\u01b0\u1eddng h\u1ea7m th\u00f4ng gi\u00f3 \u1ea9m m\u1eb7n, m\u00e1i che\/lan can ngo\u00e0i tr\u1eddi h\u1ee9ng s\u01b0\u01a1ng bi\u1ec3n.  \n- Nh\u00e0 m\u00e1y x\u1eed l\u00fd n\u01b0\u1edbc th\u1ea3i, h\u00f3a ch\u1ea5t nh\u1eb9\u2013trung b\u00ecnh, b\u1ed3n\/b\u1ec7 \u0111\u1ee1 quanh b\u1ec3 clo, NaClO, H2S, NH3: 316L l\u00e0 m\u1ee9c kh\u1edfi \u0111\u1ea7u, duplex cho v\u00f9ng ng\u1eadp\u2013t\u00e1p n\u01b0\u1edbc.\n\n\n\n<h3>Tu\u1ed5i th\u1ecd thi\u1ebft k\u1ebf \u2265 50 n\u0103m, chi ph\u00ed d\u1eebng m\u00e1y cao ho\u1eb7c kh\u00f3 b\u1ea3o tr\u00ec<\/h3>\n<p>&#8211; K\u1ebft c\u1ea5u \u1edf v\u1ecb tr\u00ed cao, ch\u1eadt h\u1eb9p, tr\u00ean m\u1eb7t n\u01b0\u1edbc ho\u1eb7c trong khu s\u1ea3n xu\u1ea5t 24\/7, n\u01a1i m\u1ed7i l\u1ea7n s\u01a1n s\u1eeda c\u1ea7n gi\u00e0n gi\u00e1o, phong t\u1ecfa khu v\u1ef1c: chi ph\u00ed gi\u00e1n \u0111o\u1ea1n v\u01b0\u1ee3t xa ti\u1ec1n v\u1eadt t\u01b0. Inox gi\u00fap \u201cl\u1eafp l\u00e0 qu\u00ean\u201d, gi\u1ea3m chu k\u1ef3 b\u1ea3o tr\u00ec.<br \/>\n&#8211; C\u00f4ng tr\u00ecnh c\u00f4ng c\u1ed9ng\/bi\u1ec3u t\u01b0\u1ee3ng c\u1ea7n \u0111\u1ed9 s\u1eb5n s\u00e0ng v\u00e0 th\u1ea9m m\u1ef9 b\u1ec1n theo th\u1eddi gian (c\u1ea7u \u0111i b\u1ed9, nh\u00e0 ga, s\u00e2n v\u1eadn \u0111\u1ed9ng).<\/p>\n<h3>Y\u00eau c\u1ea7u v\u1ec7 sinh, an to\u00e0n th\u1ef1c ph\u1ea9m \u2013 d\u01b0\u1ee3c ph\u1ea9m<\/h3>\n<p>&#8211; Khung \u0111\u1ee1, b\u1ec7 m\u00e1y, s\u00e0n thao t\u00e1c trong x\u01b0\u1edfng th\u1ef1c ph\u1ea9m, \u0111\u1ed3 u\u1ed1ng, d\u01b0\u1ee3c: b\u1ec1 m\u1eb7t inox s\u00e1ng, d\u1ec5 l\u00e0m s\u1ea1ch, kh\u00f4ng c\u1ea7n s\u01a1n (ngu\u1ed3n ph\u00e1t sinh m\u1ea1t s\u01a1n) v\u00e0 ch\u1ed1ng \u0103n m\u00f2n t\u1eeb ch\u1ea5t t\u1ea9y r\u1eeda clo. Th\u00f4ng th\u01b0\u1eddng d\u00f9ng 304\/316L t\u00f9y h\u00f3a ch\u1ea5t.<\/p>\n<h3>Th\u1ea9m m\u1ef9 ki\u1ebfn tr\u00fac v\u00e0 b\u1ec1 m\u1eb7t l\u1ed9 thi\u00ean<\/h3>\n<p>&#8211; Lan can, v\u00ec k\u00e8o, d\u1ea7m l\u1ed9 thi\u00ean trong c\u00f4ng tr\u00ecnh cao c\u1ea5p. Inox gi\u1eef m\u00e0u, \u00edt loang \u1ed1 n\u1ebfu ch\u1ecdn b\u1ec1 m\u1eb7t ph\u00f9 h\u1ee3p v\u00e0 x\u1eed l\u00fd chu\u1ea9n sau h\u00e0n. Chi ph\u00ed v\u00f2ng \u0111\u1eddi v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng th\u1ea9m m\u1ef9 v\u01b0\u1ee3t tr\u1ed9i so v\u1edbi s\u01a1n\/m\u1ea1 sau v\u00e0i chu k\u1ef3 b\u1ea3o tr\u00ec.<\/p>\n<h3>Nhi\u1ec7t \u0111\u1ed9 \u0111\u1eb7c bi\u1ec7t, \u0111\u1ed9 dai va \u0111\u1eadp v\u00e0 y\u00eau c\u1ea7u phi t\u1eeb<\/h3>\n<p>&#8211; Nhi\u1ec7t \u0111\u1ed9 r\u1ea5t th\u1ea5p (cryogenic) v\u00e0 y\u00eau c\u1ea7u \u0111\u1ed9 dai va \u0111\u1eadp: austenitic (304\/316L) gi\u1eef \u0111\u1ed9 dai t\u1ed1t \u1edf nhi\u1ec7t \u0111\u1ed9 \u00e2m s\u00e2u.<br \/>\n&#8211; Y\u00eau c\u1ea7u phi t\u1eeb ho\u1eb7c t\u1eeb t\u00ednh th\u1ea5p (ph\u00f2ng MRI, thi\u1ebft b\u1ecb \u0111o l\u01b0\u1eddng): austenitic \u0111\u00e1p \u1ee9ng.<br \/>\n&#8211; \u1ede h\u1ecfa ho\u1ea1n, inox d\u1eabn nhi\u1ec7t th\u1ea5p h\u01a1n th\u00e9p carbon v\u00e0 c\u00f3 hi\u1ec7u n\u0103ng ch\u1ecbu l\u1eeda thu\u1eadn l\u1ee3i \u1edf m\u1ed9t s\u1ed1 c\u1ea5u h\u00ecnh; c\u1ea7n t\u00ednh theo ti\u00eau chu\u1ea9n chuy\u00ean bi\u1ec7t.<\/p>\n<h2 id=\"toc-1-chon-mac-inox-theo-muc-do-an-mon-va-tai-trong\">Ch\u1ecdn m\u00e1c inox theo m\u1ee9c \u0111\u1ed9 \u0103n m\u00f2n v\u00e0 t\u1ea3i tr\u1ecdng<\/h2>\n<p>&#8211; 304\/304L: d\u00f9ng cho m\u00f4i tr\u01b0\u1eddng trong nh\u00e0 kh\u00f4 r\u00e1o ho\u1eb7c ngo\u00e0i tr\u1eddi s\u1ea1ch, \u00edt Cl-. \u0110\u1ed9 b\u1ec1n 0,2% proof stress typ. ~170\u2013220 MPa.<br \/>\n&#8211; 316\/316L (Mo ~2%): ch\u1ed1ng r\u1ed7\/k\u1ebd h\u1edf t\u1ed1t h\u01a1n 304; ph\u00f9 h\u1ee3p m\u00f4i tr\u01b0\u1eddng ven bi\u1ec3n nh\u1eb9, n\u01b0\u1edbc th\u1ea3i, h\u00f3a ch\u1ea5t nh\u1eb9. 0,2% proof stress ~170\u2013240 MPa.<br \/>\n&#8211; Duplex 2205 (EN 1.4462): ch\u1ed1ng \u0103n m\u00f2n clorua v\u01b0\u1ee3t tr\u1ed9i v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 cao (0,2% proof stress ~450\u2013550 MPa), th\u00edch h\u1ee3p v\u00f9ng phun s\u00f3ng, b\u1ec7 c\u1ea7u c\u1ea3ng, k\u1ebft c\u1ea5u m\u1ea3nh c\u1ea7n ch\u1ecbu l\u1ef1c l\u1edbn.<br \/>\n&#8211; 904L\/super austenitic ho\u1eb7c super duplex (2507) cho m\u00f4i tr\u01b0\u1eddng c\u1ef1c kh\u1eafc nghi\u1ec7t (n\u01b0\u1edbc bi\u1ec3n n\u00f3ng, axit + clorua).<br \/>\n&#8211; Ch\u1ec9 s\u1ed1 PREN (Pitting Resistance Equivalent Number) gi\u00fap so s\u00e1nh kh\u1ea3 n\u0103ng ch\u1ed1ng r\u1ed7: PREN \u2248 %Cr + 3.3\u00d7%Mo + 16\u00d7%N. 304 \u2248 18\u201319; 316L \u2248 24\u201326; 2205 \u2248 34\u201336. PREN c\u00e0ng cao, ch\u1ed1ng r\u1ed7 c\u00e0ng t\u1ed1t (tham kh\u1ea3o Euro Inox).<\/p>\n<p>Th\u00f4ng s\u1ed1 v\u1eadt li\u1ec7u quan tr\u1ecdng khi thi\u1ebft k\u1ebf:<br \/>\n&#8211; M\u00f4-\u0111un \u0111\u00e0n h\u1ed3i E \u2248 200 GPa (t\u01b0\u01a1ng \u0111\u01b0\u01a1ng th\u00e9p carbon).<br \/>\n&#8211; H\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t: austenitic ~16\u201317 \u00b5m\/m\u00b7K (cao h\u01a1n th\u00e9p carbon ~12); duplex ~13 \u00b5m\/m\u00b7K.<br \/>\n&#8211; \u0110\u01b0\u1eddng cong \u1ee9ng su\u1ea5t\u2013bi\u1ebfn d\u1ea1ng kh\u00f4ng c\u00f3 th\u1ec1m ch\u1ea3y; d\u00f9ng gi\u1edbi h\u1ea1n ch\u1ea3y quy \u01b0\u1edbc 0,2% khi t\u00ednh to\u00e1n.<\/p>\n<h2 id=\"toc-2-dang-san-pham-va-tieu-chuan-nguon-cung-tai-viet-na\">D\u1ea1ng s\u1ea3n ph\u1ea9m v\u00e0 ti\u00eau chu\u1ea9n \u2013 ngu\u1ed3n cung t\u1ea1i Vi\u1ec7t Nam<\/h2>\n<p>&#8211; T\u1ea5m\/plate: ASTM A240\/EN 10088-2, d\u00e0y ph\u1ed5 bi\u1ebfn 3\u201350 mm (304\/304L\/316L); d\u00e0y l\u1edbn h\u01a1n c\u1ea7n \u0111\u1eb7t h\u00e0ng.<br \/>\n&#8211; \u1ed0ng c\u00f4ng nghi\u1ec7p: ASTM A312 (h\u00e0n\/\u0111\u00fac, SCH10\/40\/80), 304\/316L; \u1ed0ng h\u1ed9p k\u1ebft c\u1ea5u: ASTM A554 (trang tr\u00ed) \u2013 khi d\u00f9ng k\u1ebft c\u1ea5u n\u00ean ch\u1ecdn th\u00e0nh d\u00e0y \u0111\u1ee7 v\u00e0 ki\u1ec3m tra c\u01a1 t\u00ednh.<br \/>\n&#8211; Thanh, ty ren: ASTM A276\/A479; bu l\u00f4ng A2-70 (304), A4-70\/80 (316).<br \/>\n&#8211; Ti\u1ebft di\u1ec7n ch\u1eef I\/H inox th\u00e0nh ph\u1ea9m \u00edt ph\u1ed5 bi\u1ebfn; gi\u1ea3i ph\u00e1p th\u00f4ng d\u1ee5ng l\u00e0 d\u1ea7m t\u1ed5 h\u1ee3p h\u00e0n t\u1eeb t\u1ea5m inox.<br \/>\n&#8211; Duplex\/904L: th\u01b0\u1eddng theo \u0111\u01a1n h\u00e0ng nh\u1eadp, c\u1ea7n lead time 6\u201310 tu\u1ea7n.<\/p>\n<p>Li\u00ean h\u1ec7 nh\u00e0 cung c\u1ea5p uy t\u00edn \u0111\u1ec3 x\u00e1c nh\u1eadn t\u1ed3n kho, ch\u1ee9ng ch\u1ec9 (MTC), b\u1ec1 m\u1eb7t (2B, No.4, bead blasted), v\u00e0 xu\u1ea5t x\u1ee9.<\/p>\n<h2 id=\"toc-3-thiet-ke-ket-cau-inox-khac-gi-so-voi-thep-carbon\">Thi\u1ebft k\u1ebf k\u1ebft c\u1ea5u inox: kh\u00e1c g\u00ec so v\u1edbi th\u00e9p carbon?<\/h2>\n<p>&#8211; Quy ph\u1ea1m:<br \/>\n  &#8211; EN 1993-1-4 (Eurocode 3 \u2013 Ph\u1ea7n 1-4) v\u00e0 \u201cDesign Manual for Structural Stainless Steel\u201d (SCI P413) l\u00e0 t\u00e0i li\u1ec7u tham kh\u1ea3o ch\u00ednh \u1edf ch\u00e2u \u00c2u.<br \/>\n  &#8211; AISC Design Guide 27 (Structural Stainless Steel) h\u1eefu \u00edch cho h\u1ec7 M\u1ef9.<br \/>\n  &#8211; C\u00e1c ti\u00eau chu\u1ea9n n\u00e0y x\u00e9t \u0111\u1ebfn \u1ee9ng x\u1eed phi tuy\u1ebfn, \u1ed5n \u0111\u1ecbnh t\u1ea5m\/thanh kh\u00e1c bi\u1ec7t c\u1ee7a inox (\u0111\u1ed9 h\u00f3a b\u1ec1n bi\u1ebfn d\u1ea1ng cao, kh\u00f4ng c\u00f3 th\u1ec1m ch\u1ea3y).<br \/>\n&#8211; T\u00ednh to\u00e1n: d\u00f9ng c\u01b0\u1eddng \u0111\u1ed9 0,2% proof stress theo m\u00e1c v\u00e0 chi\u1ec1u d\u00e0y; ch\u00fa \u00fd gi\u1ea3m b\u1ec1 r\u1ed9ng h\u1eefu hi\u1ec7u cho t\u1ea5m m\u1ea3nh theo quy ph\u1ea1m inox (kh\u00e1c h\u1ec7 s\u1ed1 so v\u1edbi th\u00e9p carbon).<br \/>\n&#8211; Li\u00ean k\u1ebft:<br \/>\n  &#8211; Bu l\u00f4ng A4-70\/80 cho m\u00f4i tr\u01b0\u1eddng bi\u1ec3n; xem x\u00e9t li\u00ean k\u1ebft ma s\u00e1t\/slip-critical n\u1ebfu c\u1ea7n h\u1ea1n ch\u1ebf chuy\u1ec3n v\u1ecb.<br \/>\n  &#8211; H\u00e0n: d\u00f9ng que\/ d\u00e2y h\u00e0n t\u01b0\u01a1ng h\u1ee3p (ER308L\/ER316L cho 304\/316L; ER2209 cho 2205), ki\u1ec3m so\u00e1t nhi\u1ec7t v\u00e0o; sau h\u00e0n ph\u1ea3i t\u1ea9y m\u1ed1i m\u00e0u (heat tint) v\u00e0 th\u1ee5 \u0111\u1ed9ng h\u00f3a (pickling-passivation) \u0111\u1ec3 ph\u1ee5c h\u1ed3i l\u1edbp th\u1ee5 \u0111\u1ed9ng.<br \/>\n  &#8211; Tr\u00e1nh b\u1eaby k\u1ebd h\u1edf, khe h\u1edf kh\u00f3 r\u1eeda; bo g\u00f3c, tho\u00e1t n\u01b0\u1edbc t\u1ed1t \u0111\u1ec3 gi\u1ea3m \u0103n m\u00f2n k\u1ebd h\u1edf.<br \/>\n&#8211; \u0102n m\u00f2n \u0111i\u1ec7n h\u00f3a: tr\u00e1nh ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp inox\u2013th\u00e9p carbon\/nh\u00f4m trong m\u00f4i tr\u01b0\u1eddng \u1ea9m m\u1eb7n; d\u00f9ng \u0111\u1ec7m c\u00e1ch \u0111i\u1ec7n, s\u01a1n c\u00e1ch ly, long \u0111en phi kim.<br \/>\n&#8211; B\u1ec1 m\u1eb7t: b\u1ec1 m\u1eb7t c\u00e0ng m\u1ecbn c\u00e0ng ch\u1ed1ng \u0103n m\u00f2n t\u1ed1t; \u01b0u ti\u00ean 2B\/No.4 \u0111\u00e1nh b\u00f3ng chu\u1ea9n, l\u00e0m s\u1ea1ch to\u00e0n b\u1ed9 sau gia c\u00f4ng.<\/p>\n<h2 id=\"toc-4-chi-phi-vong-doi-vi-du-tinh-nhanh-tham-khao\">Chi ph\u00ed v\u00f2ng \u0111\u1eddi: v\u00ed d\u1ee5 t\u00ednh nhanh (tham kh\u1ea3o)<\/h2>\n<p>Gi\u1ea3 thi\u1ebft c\u00f4ng tr\u00ecnh lan can c\u1ea7u ven bi\u1ec3n (C5-M, b\u1ea3o tr\u00ec kh\u00f3). So s\u00e1nh hai ph\u01b0\u01a1ng \u00e1n, quy \u0111\u1ed5i v\u1ec1 gi\u00e1 tr\u1ecb hi\u1ec7n t\u1ea1i r = 6%\/n\u0103m.<\/p>\n<p>&#8211; Ph\u01b0\u01a1ng \u00e1n A \u2013 Th\u00e9p carbon + s\u01a1n h\u1ec7 C5-M (theo ISO 12944-1, tu\u1ed5i th\u1ecd l\u1edbp s\u01a1n th\u1ef1c t\u1ebf 7\u201315 n\u0103m):<br \/>\n  &#8211; Chi ph\u00ed \u0111\u1ea7u t\u01b0 ban \u0111\u1ea7u (v\u1eadt t\u01b0 + gia c\u00f4ng + s\u01a1n + l\u1eafp): 1,00 (chu\u1ea9n h\u00f3a).<br \/>\n  &#8211; B\u1ea3o tr\u00ec \u0111\u1ecbnh k\u1ef3 (7, 14, 21, 28 n\u0103m): m\u1ed7i l\u1ea7n 0,45 (0,30 s\u01a1n + 0,15 d\u00e0n gi\u00e1o\/gi\u00e1n \u0111o\u1ea1n).<br \/>\n  &#8211; NPV b\u1ea3o tr\u00ec: 0,45\/1,50 + 0,45\/2,21 + 0,45\/3,25 + 0,45\/4,78 \u2248 0,734.<br \/>\n  &#8211; T\u1ed5ng NPV ~ 1,734.<\/p>\n<p>&#8211; Ph\u01b0\u01a1ng \u00e1n B \u2013 Inox 316L kh\u00f4ng s\u01a1n:<br \/>\n  &#8211; Chi ph\u00ed \u0111\u1ea7u t\u01b0 ban \u0111\u1ea7u: 1,60 (cao h\u01a1n do v\u1eadt li\u1ec7u v\u00e0 h\u00e0n).<br \/>\n  &#8211; B\u1ea3o tr\u00ec: v\u1ec7 sinh nh\u1eb9 n\u0103m 10, 20 (m\u1ed7i l\u1ea7n 0,02).<br \/>\n  &#8211; NPV b\u1ea3o tr\u00ec: 0,02\/1,79 + 0,02\/3,21 \u2248 0,017.<br \/>\n  &#8211; T\u1ed5ng NPV ~ 1,617.<\/p>\n<p>K\u1ebft lu\u1eadn v\u00ed d\u1ee5: Trong m\u00f4i tr\u01b0\u1eddng C5-M v\u1edbi b\u1ea3o tr\u00ec kh\u00f3\/\u0111\u1eaft \u0111\u1ecf, inox 316L r\u1ebb h\u01a1n v\u1ec1 chi ph\u00ed v\u00f2ng \u0111\u1eddi 30 n\u0103m. V\u1edbi t\u1ea3i tr\u1ecdng l\u1edbn ho\u1eb7c v\u00f9ng phun s\u00f3ng, duplex 2205 (d\u00f9 chi ph\u00ed \u0111\u1ea7u cao h\u01a1n 316L) c\u00f3 th\u1ec3 ti\u1ebfp t\u1ee5c t\u1ed1i \u01b0u nh\u1edd gi\u1ea3m kh\u1ed1i l\u01b0\u1ee3ng th\u00e9p v\u00e0 b\u1ea3o tr\u00ec.<\/p>\n<p>L\u01b0u \u00fd: s\u1ed1 li\u1ec7u ch\u1ec9 minh h\u1ecda; th\u1ef1c t\u1ebf c\u1ea7n b\u00f3c t\u00e1ch kh\u1ed1i l\u01b0\u1ee3ng, \u0111\u01a1n gi\u00e1 \u0111\u1ecba ph\u01b0\u01a1ng, chu k\u1ef3 v\u1eadn h\u00e0nh v\u00e0 r\u1ee7i ro \u0103n m\u00f2n c\u1ee5 th\u1ec3.<\/p>\n<h2 id=\"toc-5-checklist-ra-quyet-dinh-nhanh\">Checklist ra quy\u1ebft \u0111\u1ecbnh nhanh<\/h2>\n<p>Tr\u1ea3 l\u1eddi \u201cC\u00f3\u201d cho \u2265 3 m\u1ee5c d\u01b0\u1edbi \u0111\u00e2y th\u00ec n\u00ean \u01b0u ti\u00ean inox:<br \/>\n&#8211; C\u00f4ng tr\u00ecnh trong v\u00f9ng C4\u2013C5\/CX ho\u1eb7c c\u00f3 chloride (bi\u1ec3n, mu\u1ed1i, n\u01b0\u1edbc th\u1ea3i).<br \/>\n&#8211; Tu\u1ed5i th\u1ecd y\u00eau c\u1ea7u \u2265 50 n\u0103m, ho\u1eb7c chi ph\u00ed d\u1eebng m\u00e1y\/gi\u00e0n gi\u00e1o cao.<br \/>\n&#8211; K\u1ebft c\u1ea5u l\u1ed9 thi\u00ean y\u00eau c\u1ea7u th\u1ea9m m\u1ef9 b\u1ec1n v\u1eefng, \u00edt \u1ed1 b\u1ea9n.<br \/>\n&#8211; M\u00f4i tr\u01b0\u1eddng c\u1ea7n v\u1ec7 sinh cao, tr\u00e1nh l\u1edbp ph\u1ee7 s\u01a1n.<br \/>\n&#8211; C\u00f3 ti\u1ebfp x\u00fac n\u01b0\u1edbc m\u1eb7n\/s\u01b0\u01a1ng mu\u1ed1i\/t\u00e1p n\u01b0\u1edbc li\u00ean t\u1ee5c.<br \/>\n&#8211; G\u1ea7n ngu\u1ed3n h\u00f3a ch\u1ea5t oxy h\u00f3a y\u1ebfu\u2013trung b\u00ecnh (NaClO, H2S).<br \/>\n&#8211; Y\u00eau c\u1ea7u phi t\u1eeb ho\u1eb7c dai va \u0111\u1eadp \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p.<br \/>\n&#8211; Kh\u00f3 ki\u1ec3m so\u00e1t\/duy tr\u00ec ch\u1ea5t l\u01b0\u1ee3ng s\u01a1n m\u1ea1 trong su\u1ed1t v\u00f2ng \u0111\u1eddi.<\/p>\n<h2 id=\"toc-6-luu-y-thi-cong-de-dat-tuoi-tho-thiet-ke\">L\u01b0u \u00fd thi c\u00f4ng \u0111\u1ec3 \u0111\u1ea1t tu\u1ed5i th\u1ecd thi\u1ebft k\u1ebf<\/h2>\n<p>&#8211; D\u1ee5ng c\u1ee5 ri\u00eang cho inox, kh\u00f4ng d\u00f9ng chung v\u1edbi th\u00e9p carbon \u0111\u1ec3 tr\u00e1nh nhi\u1ec5m s\u1eaft.<br \/>\n&#8211; H\u00e0n xong ph\u1ea3i t\u1ea9y m\u1ed1i m\u00e0u, r\u1eeda axit\/th\u1ee5 \u0111\u1ed9ng h\u00f3a to\u00e0n b\u1ed9 v\u00f9ng \u1ea3nh h\u01b0\u1edfng nhi\u1ec7t.<br \/>\n&#8211; Che ch\u1eafn trong thi c\u00f4ng \u0111\u1ec3 tr\u00e1nh b\u1ee5i s\u1eaft, v\u00f4i v\u1eefa b\u00e1m; v\u1ec7 sinh sau ho\u00e0n thi\u1ec7n.<br \/>\n&#8211; Thi\u1ebft k\u1ebf tr\u00e1nh k\u1ebd h\u1edf, \u0111\u1ecdng n\u01b0\u1edbc; b\u1ea3o \u0111\u1ea3m tho\u00e1t n\u01b0\u1edbc v\u00e0 d\u1ec5 v\u1ec7 sinh.<br \/>\n&#8211; C\u00e1ch \u0111i\u1ec7n khi l\u1eafp v\u1edbi kim lo\u1ea1i kh\u00e1c; d\u00f9ng bu l\u00f4ng A4-70\/80 cho v\u00f9ng bi\u1ec3n.<br \/>\n&#8211; Ch\u1ecdn b\u1ec1 m\u1eb7t m\u1ecbn (2B\/No.4) v\u00e0 \u0111\u00e1nh b\u00f3ng ho\u00e0n thi\u1ec7n \u1edf v\u00f9ng phun s\u00f3ng.<\/p>\n<h2 id=\"toc-7-vi-du-ung-dung-dien-hinh\">V\u00ed d\u1ee5 \u1ee9ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh<\/h2>\n<p>&#8211; C\u1ea7u \u0111i b\u1ed9\/lan can ven bi\u1ec3n: 316L cho n\u1ec1n kh\u00ed bi\u1ec3n; duplex 2205 cho khu v\u1ef1c t\u00e1p s\u00f3ng.<br \/>\n&#8211; Nh\u00e0 m\u00e1y n\u01b0\u1edbc th\u1ea3i: d\u1ea7m \u0111\u1ee1 song ch\u1eafn r\u00e1c, s\u00e0n thao t\u00e1c, tay v\u1ecbn d\u00f9ng 316L; bu l\u00f4ng A4.<br \/>\n&#8211; X\u01b0\u1edfng ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m\/\u0111\u1ed3 u\u1ed1ng: khung b\u1ec7 m\u00e1y 304\/316L, m\u1ed1i h\u00e0n x\u1eed l\u00fd passivation \u0111\u1ea1t v\u1ec7 sinh.<br \/>\n&#8211; B\u1ebfn du thuy\u1ec1n\/c\u1ea7u c\u1ea3ng: k\u1ebft c\u1ea5u ph\u1ee5, gi\u00e1 \u0111\u1ee1, li\u00ean k\u1ebft neo 2205 \u0111\u1ec3 b\u1ea3o to\u00e0n c\u01b0\u1eddng \u0111\u1ed9 v\u00e0 ch\u1ed1ng r\u1ed7.<\/p>\n<h2 id=\"toc-8-nguon-tham-khao\">Ngu\u1ed3n tham kh\u1ea3o<\/h2>\n<p>&#8211; EN 1993-1-4: Eurocode 3 \u2013 Design of steel structures \u2013 Part 1-4: General rules \u2013 Stainless steels.<br \/>\n&#8211; SCI P413: The Design Manual for Structural Stainless Steel, 4th Edition, 2021 (Steel Construction Institute\/Euro Inox).<br \/>\n&#8211; AISC Design Guide 27: Structural Stainless Steel, American Institute of Steel Construction.<br \/>\n&#8211; ISO 9223: Corrosion of metals and alloys \u2013 Corrosivity of atmospheres.<br \/>\n&#8211; ISO 12944: Paints and varnishes \u2013 Corrosion protection of steel structures by protective paint systems.<br \/>\n&#8211; Euro Inox\/Nickel Institute: Selection and Use of Stainless Steel in Atmospheric, Marine and Wastewater Environments (euro-inox.org; nickelinstitute.org).<br \/>\n&#8211; ASTM A240, A312, A276, A554 \u2013 c\u00e1c ti\u00eau chu\u1ea9n s\u1ea3n ph\u1ea9m inox th\u00f4ng d\u1ee5ng.<\/p>\n<h2 id=\"toc-9-ket-luan\">K\u1ebft lu\u1eadn<\/h2>\n<p>B\u1ea1n c\u1ea7n d\u00f9ng inox cho k\u1ebft c\u1ea5u ch\u1ecbu l\u1ef1c khi: m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n cao ho\u1eb7c nhi\u1ec1u chloride; c\u00f4ng tr\u00ecnh y\u00eau c\u1ea7u tu\u1ed5i th\u1ecd d\u00e0i v\u1edbi chi ph\u00ed d\u1eebng m\u00e1y l\u1edbn; c\u1ea7n v\u1ec7 sinh\/th\u1ea9m m\u1ef9 b\u1ec1n; ho\u1eb7c c\u00f3 y\u00eau c\u1ea7u \u0111\u1eb7c bi\u1ec7t v\u1ec1 c\u01a1 l\u00fd (phi t\u1eeb, nhi\u1ec7t \u0111\u1ed9 th\u1ea5p). H\u00e3y ch\u1ecdn m\u00e1c ph\u00f9 h\u1ee3p (316L cho bi\u1ec3n nh\u1eb9, 2205 cho phun s\u00f3ng), thi\u1ebft k\u1ebf theo EN 1993-1-4\/AISC DG27, v\u00e0 thi c\u00f4ng \u0111\u00fang quy tr\u00ecnh t\u1ea9y\u2013th\u1ee5 \u0111\u1ed9ng h\u00f3a. L\u00e0m t\u1ed1t c\u00e1c b\u01b0\u1edbc n\u00e0y, inox kh\u00f4ng ch\u1ec9 \u201cc\u1ea7n thi\u1ebft\u201d m\u00e0 c\u00f2n \u201ckinh t\u1ebf\u201d tr\u00ean to\u00e0n v\u00f2ng \u0111\u1eddi.<\/p>\n<p>C\u1ea7n t\u01b0 v\u1ea5n m\u00e1c v\u1eadt li\u1ec7u, t\u1ed3n kho v\u00e0 gi\u1ea3i ph\u00e1p t\u1ed1i \u01b0u cho c\u00f4ng tr\u00ecnh c\u1ee7a b\u1ea1n? Li\u00ean h\u1ec7 Inox C\u01b0\u1eddng Th\u1ecbnh \u2013 Hotline: 0343.417.281 \u2013 Email: inoxcongnghiep.cuongthinh@gmail.com \u0111\u1ec3 nh\u1eadn b\u00e1o gi\u00e1 t\u1ed1t nh\u1ea5t v\u00e0 h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt chi ti\u1ebft.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>X\u00e1c \u0111\u1ecbnh \u0111i\u1ec1u ki\u1ec7n bu\u1ed9c d\u00f9ng inox cho k\u1ebft c\u1ea5u: m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n, b\u1ea3o tr\u00ec kh\u00f3, v\u1ec7 sinh cao; ch\u1ecdn m\u00e1c 304\/316\/duplex, thi\u1ebft k\u1ebf theo Eurocode\/AISC, t\u1ed1i \u01b0u chi ph\u00ed v\u00f2ng \u0111\u1eddi.<\/p>\n","protected":false},"author":7,"featured_media":1012,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-2158","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\/2158","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=2158"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/2158\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1012"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=2158"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=2158"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=2158"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}