{"id":1668,"date":"2026-02-13T00:35:53","date_gmt":"2026-02-12T17:35:53","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/huong-dan-chon-quy-cach-inox-hop-vuong-chu-nhat-cho-khung-ket-cau\/"},"modified":"2026-02-13T00:35:53","modified_gmt":"2026-02-12T17:35:53","slug":"huong-dan-chon-quy-cach-inox-hop-vuong-chu-nhat-cho-khung-ket-cau","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/huong-dan-chon-quy-cach-inox-hop-vuong-chu-nhat-cho-khung-ket-cau\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn ch\u1ecdn quy c\u00e1ch inox h\u1ed9p vu\u00f4ng, ch\u1eef nh\u1eadt cho khung k\u1ebft c\u1ea5u"},"content":{"rendered":"<div class=\"custom-toc\">\n<h3>N\u1ed9i dung ch\u00ednh<\/h3>\n<ul>\n<li><a href=\"#toc-0-1-inox-hop-vuongchu-nhat-khai-niem-tieu-chuan-va-q\">1) Inox h\u1ed9p vu\u00f4ng\/ch\u1eef nh\u1eadt: Kh\u00e1i ni\u1ec7m, ti\u00eau chu\u1ea9n v\u00e0 quy c\u00e1ch th\u1ecb tr\u01b0\u1eddng<\/a><\/li>\n<li><a href=\"#toc-1-2-chon-mac-inox-theo-moi-truong-an-mon\">2) Ch\u1ecdn m\u00e1c inox theo m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n<\/a><\/li>\n<li><a href=\"#toc-2-3-xac-dinh-kich-thuoc-va-do-day-nguyen-tac-co-hoc-\">3) X\u00e1c \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc v\u00e0 \u0111\u1ed9 d\u00e0y: nguy\u00ean t\u1eafc c\u01a1 h\u1ecdc th\u1ef1c d\u1ee5ng<\/a><\/li>\n<li><a href=\"#toc-3-4-vi-du-tinh-nhanh-khung-dam-mai-che-nhip-25-m\">4) V\u00ed d\u1ee5 t\u00ednh nhanh: khung d\u1ea7m m\u00e1i che nh\u1ecbp 2.5 m<\/a><\/li>\n<li><a href=\"#toc-4-5-goi-y-quy-cach-theo-ung-dung-thuc-te\">5) G\u1ee3i \u00fd quy c\u00e1ch theo \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf<\/a><\/li>\n<li><a href=\"#toc-5-6-toi-uu-do-day-va-khoi-luong-cong-thuc-nhanh\">6) T\u1ed1i \u01b0u \u0111\u1ed9 d\u00e0y v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng: c\u00f4ng th\u1ee9c nhanh<\/a><\/li>\n<li><a href=\"#toc-6-7-hoan-thien-be-mat-va-thi-cong\">7) Ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t v\u00e0 thi c\u00f4ng<\/a><\/li>\n<li><a href=\"#toc-7-8-kiem-tra-chat-luong-va-dung-sai\">8) Ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 dung sai<\/a><\/li>\n<li><a href=\"#toc-8-9-quy-trinh-chon-quy-cach-5-buoc\">9) Quy tr\u00ecnh ch\u1ecdn quy c\u00e1ch 5 b\u01b0\u1edbc<\/a><\/li>\n<li><a href=\"#toc-9-10-loi-ich-vong-doi-va-chi-phi\">10) L\u1ee3i \u00edch v\u00f2ng \u0111\u1eddi v\u00e0 chi ph\u00ed<\/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>Inox h\u1ed9p vu\u00f4ng\/ch\u1eef nh\u1eadt l\u00e0 v\u1eadt li\u1ec7u \u201cx\u01b0\u01a1ng s\u1ed1ng\u201d cho nhi\u1ec1u h\u1ea1ng m\u1ee5c khung s\u01b0\u1eddn v\u00e0 k\u1ebft c\u1ea5u: m\u00e1i che, gi\u00e0n bi\u1ec3n b\u1ea3ng, lan can, k\u1ec7 kho, khung m\u00e1y\u2026 B\u00e0i vi\u1ebft n\u00e0y cung c\u1ea5p h\u01b0\u1edbng d\u1eabn ch\u1ecdn quy c\u00e1ch t\u1ed1i \u01b0u (m\u00e1c th\u00e9p, k\u00edch th\u01b0\u1edbc, \u0111\u1ed9 d\u00e0y, ho\u00e0n thi\u1ec7n, ti\u00eau chu\u1ea9n) k\u00e8m ph\u01b0\u01a1ng ph\u00e1p t\u00ednh nhanh \u0111\u1ed9 b\u1ec1n\/\u0111\u1ed9 v\u00f5ng \u0111\u1ec3 b\u1ea1n ra quy\u1ebft \u0111\u1ecbnh ch\u00ednh x\u00e1c, ti\u1ebft ki\u1ec7m v\u00e0 an to\u00e0n. Ch\u1ee7 \u0111\u1ec1 n\u00e0y l\u00e0 m\u1ed9t m\u1ea3nh gh\u00e9p quan tr\u1ecdng trong b\u1ee9c tranh t\u1ed5ng th\u1ec3 v\u1ec1 \u1ed1ng v\u00e0 h\u1ed9p inox trong c\u00f4ng nghi\u1ec7p.<\/p>\n<h2 id=\"toc-0-1-inox-hop-vuongchu-nhat-khai-niem-tieu-chuan-va-q\">1) Inox h\u1ed9p vu\u00f4ng\/ch\u1eef nh\u1eadt: Kh\u00e1i ni\u1ec7m, ti\u00eau chu\u1ea9n v\u00e0 quy c\u00e1ch th\u1ecb tr\u01b0\u1eddng<\/h2>\n<p>&#8211; \u0110\u1ecbnh ngh\u0129a v\u00e0 s\u1ea3n xu\u1ea5t: H\u1ed9p inox (square\/rectangular hollow sections) th\u01b0\u1eddng l\u00e0 \u1ed1ng h\u00e0n d\u1ecdc (ERW\/TIG) t\u1eeb d\u1ea3i inox cu\u1ed9n, hi\u1ec7u ch\u1ec9nh v\u00e0 n\u1eafn th\u1eb3ng; m\u1ed1i h\u00e0n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c x\u1eed l\u00fd (bead rolled, pickling &#038; passivation) t\u00f9y c\u1ea5p ch\u1ea5t l\u01b0\u1ee3ng.<br \/>\n&#8211; Ti\u00eau chu\u1ea9n tham chi\u1ebfu:<br \/>\n  &#8211; ASTM A554: \u1ed0ng inox h\u00e0n cho m\u1ee5c \u0111\u00edch c\u01a1 kh\u00ed\/trang tr\u00ed, \u00e1p d\u1ee5ng ph\u1ed5 bi\u1ebfn cho h\u1ed9p vu\u00f4ng\/ch\u1eef nh\u1eadt d\u00f9ng khung s\u01b0\u1eddn, lan can, m\u00e1i che (non\u2011pressure) t\u1ea1i VN.<br \/>\n  &#8211; GB\/T 12770 (Trung Qu\u1ed1c): \u1ed0ng inox h\u00e0n cho k\u1ebft c\u1ea5u c\u01a1 kh\u00ed, c\u00f3 h\u1ea1ng m\u1ee5c h\u1ed9p vu\u00f4ng\/ch\u1eef nh\u1eadt, d\u00f9ng r\u1ed9ng r\u00e3i \u1edf ngu\u1ed3n cung Ch\u00e2u \u00c1.<br \/>\n  &#8211; Th\u00e0nh ph\u1ea7n m\u00e1c th\u00e9p theo ASTM A240\/EN 10088 (304\/304L, 316\/316L, 201, 430\u2026).<br \/>\n&#8211; Quy c\u00e1ch ph\u1ed5 bi\u1ebfn t\u1ea1i VN:<br \/>\n  &#8211; K\u00edch th\u01b0\u1edbc m\u1eb7t c\u1eaft: 20\u00d720, 25\u00d725, 30\u00d730, 40\u00d740, 50\u00d750, 60\u00d760, 80\u00d780; rectangular: 20\u00d740, 30\u00d760, 40\u00d780, 50\u00d7100 (mm).<br \/>\n  &#8211; \u0110\u1ed9 d\u00e0y: 0.6\u20133.0 mm cho h\u1ea1ng m\u1ee5c ki\u1ebfn tr\u00fac\/trang tr\u00ed; 3.0\u20136.0 mm cho k\u1ebft c\u1ea5u n\u1eb7ng, \u0111\u1eb7c bi\u1ec7t ho\u1eb7c theo \u0111\u1eb7t h\u00e0ng.<br \/>\n  &#8211; Chi\u1ec1u d\u00e0i: 6 m\/thanh (chu\u1ea9n th\u1ecb tr\u01b0\u1eddng).<br \/>\n  &#8211; Ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t: 2B, No.4\/HL (hairline), BA (g\u01b0\u01a1ng), k\u00e8m m\u00e0ng PE b\u1ea3o v\u1ec7.<\/p>\n<h2 id=\"toc-1-2-chon-mac-inox-theo-moi-truong-an-mon\">2) Ch\u1ecdn m\u00e1c inox theo m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n<\/h2>\n<p>&#8211; Trong nh\u00e0 kh\u00f4 r\u00e1o: 201\/430 c\u00f3 th\u1ec3 \u0111\u1ee7 (kinh t\u1ebf), 304 b\u1ec1n h\u01a1n v\u1edbi v\u1ec7 sinh\/\u1ea9m nh\u1eb9.<br \/>\n&#8211; Ngo\u00e0i tr\u1eddi n\u1ed9i \u0111\u00f4 (xa bi\u1ec3n >10\u201320 km): 304\/304L l\u00e0 l\u1ef1a ch\u1ecdn c\u00e2n b\u1eb1ng. 201 ch\u1ec9 n\u00ean d\u00f9ng cho h\u1ea1ng m\u1ee5c th\u1ee9 y\u1ebfu, \u00edt \u1ee9 \u0111\u1ecdng n\u01b0\u1edbc; c\u1ea7n b\u1ea3o tr\u00ec.<br \/>\n&#8211; Ven bi\u1ec3n\/c\u00f4ng nghi\u1ec7p h\u00f3a ch\u1ea5t (\u1ea9m m\u1eb7n, SOx\/NOx): 316\/316L kh\u00e1ng pitting\/crevice t\u1ed1t h\u01a1n nh\u1edd Mo; b\u1eaft bu\u1ed9c \u1edf s\u01a1n h\u1ea3i, c\u1ea7u c\u1ea3ng, khu m\u1ea1n gi\u00f3 bi\u1ec3n.<br \/>\n&#8211; M\u00f4i tr\u01b0\u1eddng r\u1ea5t kh\u1eafc nghi\u1ec7t (C5\/Marine, b\u1ec3 \u0111i\u1ec7n ph\u00e2n, chlorine): c\u00e2n nh\u1eafc 316L b\u1ec1 m\u1eb7t t\u1ed1t, ho\u1eb7c duplex 2205 n\u1ebfu v\u1eeba c\u1ea7n kh\u00e1ng \u0103n m\u00f2n v\u1eeba ch\u1ecbu l\u1ef1c cao.<br \/>\nGhi ch\u00fa: 201 (Mn-Ni th\u1ea5p) r\u1ebb nh\u01b0ng k\u00e9m b\u1ec1n m\u1eb7n; 430 l\u00e0 ferritic (h\u00fat nam ch\u00e2m), kh\u00e1ng g\u1ec9 trung b\u00ecnh, h\u00e0n\/k\u00e9o u\u1ed1n h\u1ea1n ch\u1ebf h\u01a1n austenitic (304\/316).<\/p>\n<h2 id=\"toc-2-3-xac-dinh-kich-thuoc-va-do-day-nguyen-tac-co-hoc-\">3) X\u00e1c \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc v\u00e0 \u0111\u1ed9 d\u00e0y: nguy\u00ean t\u1eafc c\u01a1 h\u1ecdc th\u1ef1c d\u1ee5ng<\/h2>\n<h3>3.1 C\u00e1c tham s\u1ed1 thi\u1ebft k\u1ebf nhanh<\/h3>\n<p>&#8211; Nh\u1ecbp L (m) v\u00e0 t\u1ea3i tr\u1ecdng t\u00e1c d\u1ee5ng w (kN\/m) ho\u1eb7c t\u1ea3i t\u1eadp trung P (kN).<br \/>\n&#8211; M\u00f4 \u0111un \u0111\u00e0n h\u1ed3i E \u2248 193 GPa (austenitic), gi\u1edbi h\u1ea1n ch\u1ea3y Fy \u0111i\u1ec3n h\u00ecnh: 304\/316 \u2248 205 MPa; 201 \u2248 275 MPa (thay \u0111\u1ed5i theo nh\u00e0 s\u1ea3n xu\u1ea5t, \u0111\u1ed9 c\u1ee9ng sau c\u00e1n).<br \/>\n&#8211; Y\u00eau c\u1ea7u \u0111\u1ed9 v\u00f5ng: k\u1ebft c\u1ea5u nh\u1eb9 ngo\u00e0i tr\u1eddi th\u01b0\u1eddng l\u1ea5y L\/200 \u0111\u1ebfn L\/300 (nghi\u00eam ng\u1eb7t h\u01a1n cho m\u1eb7t k\u00ednh\/\u1ed1p: L\/300\u2013L\/360).<\/p>\n<h3>3.2 C\u00f4ng th\u1ee9c c\u01a1 b\u1ea3n (d\u1ea7m gi\u1ea3n \u0111\u01a1n)<\/h3>\n<p>&#8211; M\u00f4 men qu\u00e1n t\u00ednh c\u1ee7a h\u1ed9p ch\u1eef nh\u1eadt (b\u00d7h, d\u00e0y t; b\u1ec1 d\u00e0y \u0111\u1ec1u, \u0111\u01a1n v\u1ecb m):<br \/>\n  I = [b\u00b7h^3 \u2212 (b\u22122t)\u00b7(h\u22122t)^3] \/ 12<br \/>\n&#8211; M\u00f4 \u0111un ch\u1ed1ng u\u1ed1n theo tr\u1ee5c m\u1ea1nh: W = I \/ (h\/2)<br \/>\n&#8211; \u1ee8ng su\u1ea5t u\u1ed1n: \u03c3 = M \/ W \u2264 \u03c3_allow (th\u1ef1c h\u00e0nh c\u00f3 th\u1ec3 l\u1ea5y \u03c3_allow \u2248 0.6\u00b7Fy)<br \/>\n&#8211; V\u1edbi t\u1ea3i \u0111\u1ec1u: M_max = w\u00b7L^2 \/ 8; \u0110\u1ed9 v\u00f5ng max: \u03b4 = 5\u00b7w\u00b7L^4 \/ (384\u00b7E\u00b7I)<br \/>\n&#8211; C\u1ed9t ch\u1ecbu n\u00e9n (x\u1ea5p x\u1ec9): P_cr = \u03c0^2\u00b7E\u00b7I \/ (K\u00b7L)^2 (Euler), c\u1ea7n x\u00e9t \u1ed5n \u0111\u1ecbnh t\u1ed5ng th\u1ec3 v\u00e0 d\u1eb9t c\u1ee5c b\u1ed9.<\/p>\n<h3>3.3 T\u1ef7 s\u1ed1 m\u1ea3nh b\/t \u0111\u1ec3 tr\u00e1nh d\u1eb9t c\u1ee5c b\u1ed9<\/h3>\n<p>&#8211; Quy t\u1eafc th\u1ef1c d\u1ee5ng cho h\u1ed9p inox l\u1ea1nh m\u1ecfng:<br \/>\n  &#8211; Bending ch\u1ee7 \u0111\u1ea1o: h\/t v\u00e0 b\/t \u2264 60.<br \/>\n  &#8211; N\u00e9n\/\u00e9p k\u1ebft h\u1ee3p: h\/t v\u00e0 b\/t \u2264 40\u201350.<br \/>\nCh\u1ecdn t \u0111\u1ee7 d\u00e0y gi\u00fap m\u1ed1i h\u00e0n ch\u1eafc, h\u1ea1n ch\u1ebf bi\u1ebfn d\u1ea1ng khi gia c\u00f4ng\/thi c\u00f4ng.<\/p>\n<h2 id=\"toc-3-4-vi-du-tinh-nhanh-khung-dam-mai-che-nhip-25-m\">4) V\u00ed d\u1ee5 t\u00ednh nhanh: khung d\u1ea7m m\u00e1i che nh\u1ecbp 2.5 m<\/h2>\n<p>B\u00e0i to\u00e1n: D\u1ea7m th\u00e9p h\u1ed9p ch\u1eef nh\u1eadt 40\u00d780\u00d72.0 (mm), inox 304, nh\u1ecbp L = 2.5 m, t\u1ea3i \u0111\u1ec1u w (k\u1ec3 c\u1ea3 t\u1ef1 tr\u1ecdng). Ki\u1ec3m tra s\u1ee9c kh\u00e1ng v\u00e0 v\u00f5ng.<br \/>\n&#8211; Tham s\u1ed1 h\u00ecnh h\u1ecdc (m): b=0.04; h=0.08; t=0.002<br \/>\n&#8211; I \u2248 3.90\u00d710^\u22127 m^4; W \u2248 9.74\u00d710^\u22126 m^3<br \/>\n&#8211; L\u1ea5y \u03c3_allow \u2248 0.6\u00b7Fy \u2248 0.6\u00b7205 \u2248 123 MPa<br \/>\n&#8211; M_max_allow = \u03c3_allow\u00b7W \u2248 1.17 kN\u00b7m<br \/>\n&#8211; w_allow = 8\u00b7M \/ L^2 \u2248 1.5 kN\/m \u2192 t\u1ed5ng t\u1ea3i cho 1 d\u1ea7m \u2248 3.75 kN (\u2248 375 kgf) tr\u00ean nh\u1ecbp 2.5 m<br \/>\n&#8211; Ki\u1ec3m tra v\u00f5ng v\u1edbi w = 1.5 kN\/m: \u03b4 \u2248 10 mm \u2192 L\/\u03b4 \u2248 250 (\u0111\u1ea1t L\/200, ti\u1ec7m c\u1eadn L\/240)<br \/>\nK\u1ebft lu\u1eadn: 40\u00d780\u00d72.0 (304) ph\u00f9 h\u1ee3p cho m\u00e1i che nh\u1eb9 nh\u1ecbp 2.5 m \u1edf m\u1ee9c \u0111\u1ed9 v\u00f5ng L\/200\u2013L\/240. N\u1ebfu y\u00eau c\u1ea7u L\/300 ho\u1eb7c t\u1ea3i n\u1eb7ng h\u01a1n, t\u0103ng b\u1ec1 d\u00e0y l\u00ean 2.5\u20133.0 mm, ho\u1eb7c t\u0103ng chi\u1ec1u cao ti\u1ebft di\u1ec7n (v\u00ed d\u1ee5 50\u00d7100).<\/p>\n<p>L\u01b0u \u00fd: \u0110\u00e2y l\u00e0 t\u00ednh nhanh b\u1ea3o th\u1ee7 cho d\u1ea7m \u0111\u01a1n gi\u1ea3n; c\u00e1c h\u1ec7 khung ph\u1ee9c t\u1ea1p, li\u00ean k\u1ebft th\u1ef1c t\u1ebf, t\u1ea3i gi\u00f3\/\u0111\u1ed9ng, t\u00e1c \u0111\u1ed9ng \u0111i\u1ec3m neo\u2026 c\u1ea7n k\u1ef9 s\u01b0 k\u1ebft c\u1ea5u th\u1ea9m tra theo ti\u00eau chu\u1ea9n thi\u1ebft k\u1ebf (v\u00ed d\u1ee5 EN 1993\u20111\u20114 cho inox).<\/p>\n<h2 id=\"toc-4-5-goi-y-quy-cach-theo-ung-dung-thuc-te\">5) G\u1ee3i \u00fd quy c\u00e1ch theo \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf<\/h2>\n<p>&#8211; Lan can, tay v\u1ecbn, khung c\u1eeda nh\u1eb9 (trong nh\u00e0):<br \/>\n  &#8211; 201\/430 ho\u1eb7c 304; h\u1ed9p 20\u00d720\u201340\u00d740; t = 0.8\u20131.2 mm; ho\u00e0n thi\u1ec7n HL\/BA t\u00f9y th\u1ea9m m\u1ef9.<br \/>\n&#8211; M\u00e1i che, gi\u00e0n bi\u1ec3n b\u1ea3ng ngo\u00e0i tr\u1eddi n\u1ed9i \u0111\u00f4:<br \/>\n  &#8211; 304 (\u01b0u ti\u00ean); d\u1ea7m ch\u00ednh 40\u00d780, 50\u00d7100; t = 1.5\u20133.0 mm; gi\u1eb1ng 30\u00d760; li\u00ean k\u1ebft h\u00e0n + bul\u00f4ng inox A2.<br \/>\n&#8211; C\u1ed5ng, h\u00e0ng r\u00e0o, kiosk:<br \/>\n  &#8211; 304; khung 40\u00d740\u201360\u00d760; t = 1.2\u20132.0 mm; b\u1ea3n l\u1ec1 v\u00e0 \u1ed1c inox \u0111\u1ed3ng b\u1ed9 \u0111\u1ec3 tr\u00e1nh \u0103n m\u00f2n \u0111i\u1ec7n h\u00f3a.<br \/>\n&#8211; K\u1ec7\/khu\u00f4n, b\u1ec7 m\u00e1y trong x\u01b0\u1edfng th\u1ef1c ph\u1ea9m\/d\u01b0\u1ee3c:<br \/>\n  &#8211; 304\/316; 30\u00d760\u201350\u00d7100; t = 1.5\u20133.0 mm; b\u1ec1 m\u1eb7t No.4\/2B d\u1ec5 v\u1ec7 sinh.<br \/>\n&#8211; Ven bi\u1ec3n, c\u00f4ng tr\u00ecnh ti\u1ebfp x\u00fac s\u01b0\u01a1ng mu\u1ed1i:<br \/>\n  &#8211; 316\/316L b\u1eaft bu\u1ed9c; h\u1ea1n ch\u1ebf ti\u1ebft di\u1ec7n qu\u00e1 m\u1ea3nh (b\/t \u2264 50); \u01b0u ti\u00ean b\u1ec1 m\u1eb7t m\u1ecbn, v\u1ec7 sinh \u0111\u1ecbnh k\u1ef3.<br \/>\n&#8211; K\u1ebft c\u1ea5u\/m\u00f4i tr\u01b0\u1eddng r\u1ea5t n\u1eb7ng, c\u1ea7n \u0111\u1ed9 c\u1ee9ng cao v\u00e0 ch\u1ed1ng g\u1ec9:<br \/>\n  &#8211; Duplex 2205 (theo \u0111\u1eb7t h\u00e0ng): ti\u1ebft di\u1ec7n c\u00f3 th\u1ec3 nh\u1ecf h\u01a1n nh\u1edd c\u01b0\u1eddng \u0111\u1ed9 cao, nh\u01b0ng c\u1ea7n th\u1ee3 h\u00e0n chuy\u00ean inox duplex.<\/p>\n<h2 id=\"toc-5-6-toi-uu-do-day-va-khoi-luong-cong-thuc-nhanh\">6) T\u1ed1i \u01b0u \u0111\u1ed9 d\u00e0y v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng: c\u00f4ng th\u1ee9c nhanh<\/h2>\n<p>&#8211; Di\u1ec7n t\u00edch ti\u1ebft di\u1ec7n x\u1ea5p x\u1ec9 (mm\u00b2): A \u2248 2\u00b7t\u00b7(b + h \u2212 2t)<br \/>\n&#8211; Kh\u1ed1i l\u01b0\u1ee3ng l\u00fd thuy\u1ebft (kg\/m): m \u2248 0.008 \u00d7 A = 0.016\u00b7t\u00b7(b + h \u2212 2t)<br \/>\nV\u00ed d\u1ee5: H\u1ed9p 40\u00d780\u00d72.0 \u2192 A \u2248 2\u00d72\u00d7(40+80\u22124)= 4\u00d7116 = 464 mm\u00b2 \u2192 m \u2248 0.008\u00d7464 \u2248 3.71 kg\/m.<br \/>\nG\u1ee3i \u00fd: T\u0103ng chi\u1ec1u cao h hi\u1ec7u qu\u1ea3 h\u01a1n t\u0103ng \u0111\u1ed9 d\u00e0y t khi c\u1ea7n gi\u1ea3m v\u00f5ng, gi\u00fap ti\u1ebft ki\u1ec7m tr\u1ecdng l\u01b0\u1ee3ng v\u00e0 chi ph\u00ed.<\/p>\n<h2 id=\"toc-6-7-hoan-thien-be-mat-va-thi-cong\">7) Ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t v\u00e0 thi c\u00f4ng<\/h2>\n<p>&#8211; L\u1ef1a ch\u1ecdn b\u1ec1 m\u1eb7t:<br \/>\n  &#8211; 2B: kinh t\u1ebf, trong nh\u00e0\/khu\u1ea5t; No.4\/HL: th\u1ea9m m\u1ef9, che x\u01b0\u1edbc t\u1ed1t; BA: s\u00e1ng g\u01b0\u01a1ng, y\u00eau c\u1ea7u b\u1ea3o v\u1ec7\/bao b\u1ecdc k\u1ef9 khi thi c\u00f4ng.<br \/>\n&#8211; H\u00e0n: TIG\/MIG v\u1edbi d\u00e2y t\u01b0\u01a1ng th\u00edch (308L cho 304; 316L cho 316). Tr\u00e1nh \u0111\u1ec3 x\u1ec9\/oxy h\u00f3a; pickling &#038; passivation sau h\u00e0n \u0111\u1ec3 ph\u1ee5c h\u1ed3i m\u00e0ng th\u1ee5 \u0111\u1ed9ng ch\u1ed1ng g\u1ec9.<br \/>\n&#8211; C\u1eaft khoan: d\u00f9ng l\u01b0\u1ee1i c\u1eaft h\u1ee3p kim\/CBN, t\u1ed1c \u0111\u1ed9 v\u00e0 l\u00e0m m\u00e1t ph\u00f9 h\u1ee3p \u0111\u1ec3 tr\u00e1nh ch\u00e1y xanh m\u00e9p c\u1eaft (t\u1ea1o \u0111i\u1ec3m \u0103n m\u00f2n).<br \/>\n&#8211; L\u1eafp d\u1ef1ng: t\u00e1ch ly inox v\u1edbi th\u00e9p cacbon\/\u0111\u1ed3ng b\u1eb1ng \u0111\u1ec7m nh\u1ef1a\/EPDM \u0111\u1ec3 gi\u1ea3m \u0103n m\u00f2n \u0111i\u1ec7n h\u00f3a; tr\u00e1m k\u00edn khe h\u1edf \u0111\u1ecdng mu\u1ed1i.<br \/>\n&#8211; B\u1ea3o v\u1ec7: m\u00e0ng PE trong v\u1eadn chuy\u1ec3n; l\u01b0u kho kh\u00f4 r\u00e1o; tr\u00e1nh ti\u1ebfp x\u00fac v\u1eefa xi m\u0103ng\/axit r\u1eeda kh\u00f4ng trung h\u00f2a.<\/p>\n<h2 id=\"toc-7-8-kiem-tra-chat-luong-va-dung-sai\">8) Ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 dung sai<\/h2>\n<p>&#8211; Tham chi\u1ebfu dung sai ASTM A554\/GB\u2011T 12770: k\u00edch th\u01b0\u1edbc ngo\u00e0i, \u0111\u1ed9 d\u00e0y, \u0111\u1ed9 vu\u00f4ng g\u00f3c, \u0111\u1ed9 th\u1eb3ng, nh\u00e1m b\u1ec1 m\u1eb7t, \u0111i\u1ec1u ki\u1ec7n m\u1ed1i h\u00e0n. Th\u1ecb tr\u01b0\u1eddng VN th\u01b0\u1eddng: chi\u1ec1u d\u00e0i 6 m, dung sai chi\u1ec1u d\u00e0i kho\u1ea3ng \u00b110 mm; dung sai \u0111\u1ed9 d\u00e0y v\u00e0 k\u00edch th\u01b0\u1edbc ngo\u00e0i theo c\u1ea5p nh\u00e0 m\u00e1y (y\u00eau c\u1ea7u CO\/CQ r\u00f5 r\u00e0ng).<br \/>\n&#8211; H\u1ea1ng m\u1ee5c c\u1ea7n ki\u1ec3m:<br \/>\n  &#8211; Ph\u00e2n t\u00edch m\u00e1c (PMI) ho\u1eb7c test Ni\/Cr \u0111\u1ecbnh t\u00ednh khi c\u1ea7n.<br \/>\n  &#8211; \u0110o \u0111\u1ed9 d\u00e0y th\u1ef1c t\u1ebf; ki\u1ec3m m\u1ed1i h\u00e0n (\u0111\u1ed9 \u0111\u1ec1u, kh\u00f4ng r\u1ed7\/ch\u00e1y); ki\u1ec3m \u0111\u1ed9 th\u1eb3ng\/vu\u00f4ng.<br \/>\n  &#8211; V\u1edbi h\u1ea1ng m\u1ee5c ngo\u00e0i tr\u1eddi: y\u00eau c\u1ea7u passivation sau h\u00e0n; th\u1eed phun mu\u1ed1i (ISO 9227) khi c\u1ea7n ch\u1ee9ng minh kh\u1ea3 n\u0103ng kh\u00e1ng g\u1ec9 b\u1ec1 m\u1eb7t.<\/p>\n<h2 id=\"toc-8-9-quy-trinh-chon-quy-cach-5-buoc\">9) Quy tr\u00ecnh ch\u1ecdn quy c\u00e1ch 5 b\u01b0\u1edbc<\/h2>\n<p>1) X\u00e1c \u0111\u1ecbnh c\u00f4ng n\u0103ng, nh\u1ecbp, t\u1ea3i, m\u1ee9c v\u00f5ng y\u00eau c\u1ea7u v\u00e0 m\u00f4i tr\u01b0\u1eddng (n\u1ed9i \u0111\u00f4, ven bi\u1ec3n, h\u00f3a ch\u1ea5t).<br \/>\n2) Ch\u1ecdn m\u00e1c: 201\/430 (trong nh\u00e0 kinh t\u1ebf), 304 (\u0111a d\u1ee5ng), 316 (bi\u1ec3n\/h\u00f3a ch\u1ea5t), 2205 (\u0111\u1eb7c bi\u1ec7t).<br \/>\n3) Ch\u1ecdn s\u01a1 b\u1ed9 ti\u1ebft di\u1ec7n: \u01b0u ti\u00ean t\u0103ng h (chi\u1ec1u cao) tr\u01b0\u1edbc khi t\u0103ng t n\u1ebfu c\u1ea7n ch\u1ed1ng v\u00f5ng; ki\u1ec3m tra t\u1ef7 s\u1ed1 b\/t.<br \/>\n4) T\u00ednh nhanh s\u1ee9c kh\u00e1ng\/\u0111\u1ed9 v\u00f5ng theo c\u00f4ng th\u1ee9c \u1edf m\u1ee5c 3; v\u1edbi h\u1ea1ng m\u1ee5c quan tr\u1ecdng, nh\u1edd k\u1ef9 s\u01b0 k\u1ebft c\u1ea5u th\u1ea9m tra theo ti\u00eau chu\u1ea9n inox.<br \/>\n5) X\u00e1c nh\u1eadn ti\u00eau chu\u1ea9n, dung sai, b\u1ec1 m\u1eb7t, y\u00eau c\u1ea7u passivation; l\u1ea5y m\u1eabu\/CO\u2011CQ; ch\u1ed1t ti\u1ebfn \u0111\u1ed9 v\u00e0 gi\u00e1.<\/p>\n<h2 id=\"toc-9-10-loi-ich-vong-doi-va-chi-phi\">10) L\u1ee3i \u00edch v\u00f2ng \u0111\u1eddi v\u00e0 chi ph\u00ed<\/h2>\n<p>&#8211; 201 r\u1ebb h\u01a1n 304 kho\u1ea3ng 20\u201340% nh\u01b0ng r\u1ee7i ro g\u1ec9 ngo\u1ea1i th\u1ea5t cao \u2192 chi ph\u00ed b\u1ea3o tr\u00ec\/\u0111\u1ed5i m\u1edbi l\u1edbn.<br \/>\n&#8211; 316 cao h\u01a1n 304 kho\u1ea3ng 30\u201360% nh\u01b0ng b\u1ec1n m\u1eb7n v\u01b0\u1ee3t tr\u1ed9i \u2192 ti\u1ebft ki\u1ec7m v\u00f2ng \u0111\u1eddi \u1edf ven bi\u1ec3n.<br \/>\n&#8211; T\u1ed1i \u01b0u thi\u1ebft k\u1ebf (t\u0103ng h, ki\u1ec3m so\u00e1t b\/t, ch\u1ecdn b\u1ec1 m\u1eb7t \u0111\u00fang) gi\u00fap gi\u1ea3m 5\u201315% v\u1eadt li\u1ec7u m\u00e0 v\u1eabn \u0111\u1ea1t \u0111\u1ed9 c\u1ee9ng.<\/p>\n<h2 id=\"toc-10-nguon-tham-khao\">Ngu\u1ed3n tham kh\u1ea3o<\/h2>\n<p>&#8211; ASTM A554 \u2013 Standard Specification for Welded Stainless Steel Mechanical Tubing: https:\/\/www.astm.org\/a0554-21.html<br \/>\n&#8211; GB\/T 12770 \u2013 Welded Stainless Steel Tubes for Mechanical Structures (CN)<br \/>\n&#8211; Euro Inox \u2013 The Selection of Stainless Steels for Building Exterior Applications: https:\/\/www.euro-inox.org<br \/>\n&#8211; IMOA \u2013 Stainless Steel Selection for Coastal and Marine Environments: https:\/\/www.imoa.info<br \/>\n&#8211; Outokumpu Corrosion Handbook (t\u01b0 li\u1ec7u ch\u1ecdn m\u00e1c theo m\u00f4i tr\u01b0\u1eddng)<\/p>\n<h2 id=\"toc-11-ket-luan\">K\u1ebft lu\u1eadn<\/h2>\n<p>&#8211; Ch\u1ecdn \u0111\u00fang m\u00e1c inox theo m\u00f4i tr\u01b0\u1eddng (304 cho n\u1ed9i \u0111\u00f4, 316 cho ven bi\u1ec3n) quy\u1ebft \u0111\u1ecbnh \u0111\u1ed9 b\u1ec1n g\u1ec9.<br \/>\n&#8211; V\u1ec1 c\u01a1 h\u1ecdc, \u01b0u ti\u00ean t\u0103ng chi\u1ec1u cao ti\u1ebft di\u1ec7n, ki\u1ec3m so\u00e1t b\/t, v\u00e0 ch\u1ecdn \u0111\u1ed9 d\u00e0y \u0111\u1ee7 cho h\u00e0n\/\u1ed5n \u0111\u1ecbnh; ki\u1ec3m tra s\u1ee9c kh\u00e1ng v\u00e0 v\u00f5ng b\u1eb1ng c\u00f4ng th\u1ee9c \u0111\u01a1n gi\u1ea3n tr\u01b0\u1edbc khi ch\u1ed1t quy c\u00e1ch.<br \/>\n&#8211; X\u00e1c nh\u1eadn ti\u00eau chu\u1ea9n (ASTM A554\/GB\u2011T 12770), dung sai, b\u1ec1 m\u1eb7t v\u00e0 x\u1eed l\u00fd passivation \u0111\u1ec3 b\u1ea3o \u0111\u1ea3m tu\u1ed5i th\u1ecd.<br \/>\n&#8211; V\u1edbi c\u00e1ch ti\u1ebfp c\u1eadn tr\u00ean, inox h\u1ed9p vu\u00f4ng\/ch\u1eef nh\u1eadt s\u1ebd cho khung s\u01b0\u1eddn, k\u1ebft c\u1ea5u v\u1eeba ch\u1eafc, v\u1eeba \u0111\u1eb9p, t\u1ed1i \u01b0u chi ph\u00ed v\u00f2ng \u0111\u1eddi.<\/p>\n<p>C\u1ea7n t\u01b0 v\u1ea5n chi ti\u1ebft b\u1ea3n v\u1ebd v\u00e0 t\u1ed1i \u01b0u chi ph\u00ed v\u1eadt li\u1ec7u? Li\u00ean h\u1ec7 Inox Cuong Thinh \u0111\u1ec3 \u0111\u01b0\u1ee3c k\u1ef9 s\u01b0 h\u1ed7 tr\u1ee3 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>Ch\u1ecdn m\u00e1c, k\u00edch th\u01b0\u1edbc, \u0111\u1ed9 d\u00e0y v\u00e0 ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t inox h\u1ed9p vu\u00f4ng\/ch\u1eef nh\u1eadt t\u1ed1i \u01b0u cho khung s\u01b0\u1eddn, k\u1ebft c\u1ea5u. C\u00f3 c\u00f4ng th\u1ee9c t\u00ednh nhanh t\u1ea3i, v\u00f5ng, v\u00e0 v\u00ed d\u1ee5 th\u1ef1c t\u1ebf.<\/p>\n","protected":false},"author":7,"featured_media":1072,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-1668","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\/1668","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=1668"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/1668\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1072"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=1668"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=1668"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=1668"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}