{"id":1713,"date":"2026-02-24T12:35:14","date_gmt":"2026-02-24T05:35:14","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/mang-xoi-inox-304-chong-ri-set-vinh-vien-ben-30-nam-cho-mai-nha\/"},"modified":"2026-02-24T12:35:14","modified_gmt":"2026-02-24T05:35:14","slug":"mang-xoi-inox-304-chong-ri-set-vinh-vien-ben-30-nam-cho-mai-nha","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/mang-xoi-inox-304-chong-ri-set-vinh-vien-ben-30-nam-cho-mai-nha\/","title":{"rendered":"M\u00e1ng x\u1ed1i Inox 304: ch\u1ed1ng r\u1ec9 s\u00e9t v\u0129nh vi\u1ec5n, b\u1ec1n 30+ n\u0103m cho m\u00e1i nh\u00e0"},"content":{"rendered":"<div class=\"custom-toc\">\n<h3>N\u1ed9i dung ch\u00ednh<\/h3>\n<ul>\n<li><a href=\"#toc-0-inox-304-la-gi-va-vi-sao-chong-ri-set-vinh-vien\">Inox 304 l\u00e0 g\u00ec v\u00e0 v\u00ec sao \u201cch\u1ed1ng r\u1ec9 s\u00e9t v\u0129nh vi\u1ec5n\u201d?<\/a><\/li>\n<li><a href=\"#toc-1-thong-so-ky-thuat-khuyen-nghi-cho-mang-xoi-inox-30\">Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt khuy\u1ebfn ngh\u1ecb cho m\u00e1ng x\u1ed1i inox 304<\/a><\/li>\n<li><a href=\"#toc-2-so-sanh-nhanh-304-vs-201-ma-kem-nhom-pvc\">So s\u00e1nh nhanh: 304 vs 201, m\u1ea1 k\u1ebdm, nh\u00f4m, PVC<\/a><\/li>\n<li><a href=\"#toc-3-tinh-toan-kich-thuoc-mang-xoi-va-ong-thoat\">T\u00ednh to\u00e1n k\u00edch th\u01b0\u1edbc m\u00e1ng x\u1ed1i v\u00e0 \u1ed1ng tho\u00e1t<\/a><\/li>\n<li><a href=\"#toc-4-chi-tiet-thiet-ke-quan-trong-de-khong-bao-gio-ri\">Chi ti\u1ebft thi\u1ebft k\u1ebf quan tr\u1ecdng \u0111\u1ec3 \u201ckh\u00f4ng bao gi\u1edd r\u1ec9\u201d<\/a><\/li>\n<li><a href=\"#toc-5-quy-trinh-lap-dat-chuan-ben-30-nam\">Quy tr\u00ecnh l\u1eafp \u0111\u1eb7t chu\u1ea9n \u2013 b\u1ec1n 30+ n\u0103m<\/a><\/li>\n<li><a href=\"#toc-6-bao-tri-toi-thieu-nhung-can-dung-cach\">B\u1ea3o tr\u00ec t\u1ed1i thi\u1ec3u nh\u01b0ng c\u1ea7n \u0111\u00fang c\u00e1ch<\/a><\/li>\n<li><a href=\"#toc-7-chi-phi-va-loi-ich-vong-doi\">Chi ph\u00ed v\u00e0 l\u1ee3i \u00edch v\u00f2ng \u0111\u1eddi<\/a><\/li>\n<li><a href=\"#toc-8-cau-hoi-thuong-gap\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/a><\/li>\n<li><a href=\"#toc-9-khi-nao-nen-chon-inox-316-thay-cho-304\">Khi n\u00e0o n\u00ean ch\u1ecdn inox 316 thay cho 304?<\/a><\/li>\n<li><a href=\"#toc-10-ket-luan\">K\u1ebft lu\u1eadn<\/a><\/li>\n<\/ul>\n<\/div>\n<p>M\u00e1ng x\u1ed1i inox 304 l\u00e0 l\u1ef1a ch\u1ecdn \u01b0u vi\u1ec7t \u0111\u1ec3 x\u1eed l\u00fd tho\u00e1t n\u01b0\u1edbc m\u00e1i trong x\u00e2y d\u1ef1ng d\u00e2n d\u1ee5ng v\u00e0 k\u1ebft c\u1ea5u c\u00f4ng tr\u00ecnh nh\u1edd \u0111\u1ed9 b\u1ec1n cao v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng r\u1ec9 s\u00e9t g\u1ea7n nh\u01b0 v\u0129nh vi\u1ec5n. B\u00e0i vi\u1ebft n\u00e0y cung c\u1ea5p th\u00f4ng s\u1ed1 v\u1eadt li\u1ec7u, so s\u00e1nh v\u1edbi c\u00e1c ph\u01b0\u01a1ng \u00e1n kh\u00e1c, h\u01b0\u1edbng d\u1eabn t\u00ednh to\u00e1n \u2013 thi\u1ebft k\u1ebf \u2013 l\u1eafp \u0111\u1eb7t \u2013 b\u1ea3o tr\u00ec, c\u00f9ng ph\u00e2n t\u00edch chi ph\u00ed v\u00f2ng \u0111\u1eddi \u0111\u1ec3 b\u1ea1n ra quy\u1ebft \u0111\u1ecbnh nhanh v\u00e0 ch\u00ednh x\u00e1c.<\/p>\n<h2 id=\"toc-0-inox-304-la-gi-va-vi-sao-chong-ri-set-vinh-vien\">Inox 304 l\u00e0 g\u00ec v\u00e0 v\u00ec sao \u201cch\u1ed1ng r\u1ec9 s\u00e9t v\u0129nh vi\u1ec5n\u201d?<\/h2>\n<p>&#8211; Th\u00e0nh ph\u1ea7n: Inox 304 (AISI 304\/UNS S30400, EN 1.4301) ch\u1ee9a kho\u1ea3ng 18% Cr v\u00e0 8% Ni. L\u1edbp m\u00e0ng th\u1ee5 \u0111\u1ed9ng Cr2O3 t\u1ef1 t\u00e1i t\u1ea1o gi\u00fap ch\u1ed1ng \u0103n m\u00f2n kh\u00f4ng kh\u00ed, m\u01b0a axit nh\u1eb9, \u00f4 nhi\u1ec5m \u0111\u00f4 th\u1ecb hi\u1ec7u qu\u1ea3. 304L (UNS S30403, EN 1.4307) l\u00e0 bi\u1ebfn th\u1ec3 carbon th\u1ea5p, h\u00e0n t\u1ed1t h\u01a1n, ch\u1ed1ng \u0103n m\u00f2n v\u00f9ng \u1ea3nh h\u01b0\u1edfng nhi\u1ec7t t\u1ed1t h\u01a1n.<br \/>\n&#8211; Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n: Ph\u00f9 h\u1ee3p h\u1ea7u h\u1ebft m\u00f4i tr\u01b0\u1eddng n\u00f4ng th\u00f4n\/\u0111\u00f4 th\u1ecb (ISO 9223 m\u1ee9c C1\u2013C3). V\u1edbi m\u00f4i tr\u01b0\u1eddng bi\u1ec3n x\u1ecbt mu\u1ed1i, b\u1ec3 b\u01a1i clorua ho\u1eb7c c\u00f4ng nghi\u1ec7p n\u1eb7ng, \u01b0u ti\u00ean 316 \u0111\u1ec3 tr\u00e1nh \u201ctea staining\u201d (\u1ed1 v\u00e0ng b\u1ec1 m\u1eb7t) v\u00e0 pitting.<br \/>\n&#8211; V\u00ec sao b\u1ec1n h\u01a1n t\u00f4n m\u1ea1 k\u1ebdm\/PVC: Kh\u00f4ng ph\u1ee5 thu\u1ed9c l\u1edbp ph\u1ee7 s\u01a1n m\u1ea1; kh\u00f4ng l\u00e3o h\u00f3a gi\u00f2n nh\u01b0 PVC d\u01b0\u1edbi UV; l\u1edbp th\u1ee5 \u0111\u1ed9ng t\u1ef1 l\u00e0nh khi tr\u1ea7y x\u01b0\u1edbc nh\u1eb9.<\/p>\n<p>Ngu\u1ed3n tham kh\u1ea3o: ASTM A240\/A240M (\u0111\u1eb7c t\u1ea3 t\u1ea5m\/coil inox 304); Nickel Institute \u2013 Stainless steels in ABC v\u00e0 t\u00e0i li\u1ec7u Tea Staining; ISO 9223 ph\u00e2n lo\u1ea1i m\u1ee9c \u0103n m\u00f2n kh\u00ed quy\u1ec3n.<br \/>\n&#8211; ASTM A240: https:\/\/www.astm.org\/a0240_a0240m-20.html<br \/>\n&#8211; Nickel Institute (ABC): https:\/\/www.nickelinstitute.org\/media\/1632\/stainless-steels-in-architecture-building-and-construction.pdf<br \/>\n&#8211; Tea Staining: https:\/\/www.nickelinstitute.org\/media\/1681\/teastainingofstainlesssteel.pdf<br \/>\n&#8211; ISO 9223: https:\/\/www.iso.org\/standard\/88373.html<\/p>\n<h2 id=\"toc-1-thong-so-ky-thuat-khuyen-nghi-cho-mang-xoi-inox-30\">Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt khuy\u1ebfn ngh\u1ecb cho m\u00e1ng x\u1ed1i inox 304<\/h2>\n<h3>Ti\u00eau chu\u1ea9n v\u1eadt li\u1ec7u<\/h3>\n<p>&#8211; M\u00e1c: AISI 304\/304L (UNS S30400\/S30403; EN 1.4301\/1.4307)<br \/>\n&#8211; D\u1ea1ng: T\u1ea5m\/coil c\u00e1n ngu\u1ed9i theo ASTM A240\/A480<br \/>\n&#8211; B\u1ec1 m\u1eb7t: 2B (kinh t\u1ebf, d\u1ec5 gia c\u00f4ng) ho\u1eb7c No.4 hairline (th\u1ea9m m\u1ef9). G\u1ea7n bi\u1ec3n: \u01b0u ti\u00ean b\u1ec1 m\u1eb7t m\u1ecbn, electropolish n\u1ebfu c\u1ea7n.<\/p>\n<h3>T\u00ednh ch\u1ea5t c\u01a1 \u2013 l\u00fd ch\u00ednh<\/h3>\n<p>&#8211; Gi\u1edbi h\u1ea1n ch\u1ea3y Rp0.2: ~215 MPa; \u0110\u1ed9 b\u1ec1n k\u00e9o: ~520\u2013720 MPa; \u0110\u1ed9 gi\u00e3n d\u00e0i: ~45%<br \/>\n&#8211; M\u00f4 \u0111un \u0111\u00e0n h\u1ed3i: ~193 GPa; T\u1ec9 tr\u1ecdng: 8.0 g\/cm\u00b3<br \/>\n&#8211; H\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t: ~17.3 \u00b5m\/m.K (20\u2013100\u00b0C)<br \/>\n&#8211; D\u1eabn nhi\u1ec7t: ~16 W\/m.K<br \/>\nNgu\u1ed3n: Atlas\/Outokumpu datasheet 304; EngineeringToolBox.<br \/>\n&#8211; Outokumpu 304\/304L: https:\/\/www.outokumpu.com\/grades\/304-304l<br \/>\n&#8211; EngineeringToolBox (AISI 304): https:\/\/www.engineeringtoolbox.com\/stainless-steel-aisi-304-d_734.html<\/p>\n<h3>\u0110\u1ed9 d\u00e0y (khuy\u1ebfn ngh\u1ecb) theo \u1ee9ng d\u1ee5ng<\/h3>\n<p>&#8211; Nh\u00e0 \u1edf, kh\u1ea9u \u0111\u1ed9 \u0111\u1ee1 600\u2013800 mm: 0.5\u20130.6 mm<br \/>\n&#8211; Bi\u1ec7t th\u1ef1\/nh\u00e0 x\u01b0\u1edfng nh\u1eb9, kh\u1ea9u \u0111\u1ed9 800\u2013900 mm: 0.7\u20130.8 mm<br \/>\n&#8211; Nh\u00e0 c\u00f4ng nghi\u1ec7p, kh\u1ea9u \u0111\u1ed9 \u22651000 mm ho\u1eb7c v\u00f9ng b\u00e3o m\u1ea1nh: 0.9\u20131.2 mm<br \/>\nL\u01b0u \u00fd: T\u0103ng \u0111\u1ed9 d\u00e0y khi d\u00f9ng m\u00e1ng ch\u1eef nh\u1eadt th\u00e0nh cao, h\u1ea1n ch\u1ebf v\u00f5ng v\u00e0 ti\u1ebfng \u1ed3n m\u01b0a.<\/p>\n<h3>Ph\u1ee5 ki\u1ec7n \u0111\u1ed3ng b\u1ed9<\/h3>\n<p>&#8211; \u1ed0c v\u00edt\/\u0111ai treo: inox 304\/316; tr\u00e1nh th\u00e9p carbon m\u1ea1 k\u1ebdm \u0111\u1ec3 kh\u00f4ng g\u00e2y \u0103n m\u00f2n \u0111i\u1ec7n h\u00f3a.<br \/>\n&#8211; Gio\u0103ng\/\u0111\u1ec7m: EPDM ho\u1eb7c silicone ch\u1ecbu th\u1eddi ti\u1ebft.<br \/>\n&#8211; Keo tr\u00e1m: silicone trung t\u00ednh (neutral-cure), ch\u1ed1ng UV; tr\u00e1nh lo\u1ea1i ch\u1ee9a axit acetic (\u0103n m\u00f2n m\u1ed1i h\u00e0n).<\/p>\n<h2 id=\"toc-2-so-sanh-nhanh-304-vs-201-ma-kem-nhom-pvc\">So s\u00e1nh nhanh: 304 vs 201, m\u1ea1 k\u1ebdm, nh\u00f4m, PVC<\/h2>\n<p>&#8211; Inox 304: Ch\u1ed1ng r\u1ec9 s\u00e9t r\u1ea5t cao; ch\u1ecbu nhi\u1ec7t\/UV; h\u00e0n\/gia c\u00f4ng t\u1ed1t; chi ph\u00ed \u0111\u1ea7u t\u01b0 cao h\u01a1n nh\u01b0ng tu\u1ed5i th\u1ecd 30+ n\u0103m, b\u1ea3o tr\u00ec th\u1ea5p.<br \/>\n&#8211; Inox 201: H\u00e0m l\u01b0\u1ee3ng Ni th\u1ea5p; ch\u1ed1ng \u0103n m\u00f2n k\u00e9m h\u01a1n trong m\u00f4i tr\u01b0\u1eddng \u1ea9m\/\u00f4 nhi\u1ec5m; r\u1ee7i ro \u1ed1 b\u1ec1 m\u1eb7t nhanh. Kh\u00f4ng khuy\u1ebfn ngh\u1ecb cho m\u00e1i l\u00e2u d\u00e0i.<br \/>\n&#8211; T\u00f4n m\u1ea1 k\u1ebdm\/nh\u00fang n\u00f3ng: Gi\u00e1 r\u1ebb; c\u1ea7n s\u01a1n\/ph\u1ee7 b\u1ea3o tr\u00ec \u0111\u1ecbnh k\u1ef3; tu\u1ed5i th\u1ecd 8\u201315 n\u0103m \u1edf \u0111\u00f4 th\u1ecb, th\u1ea5p \u1edf bi\u1ec3n\/axit.<br \/>\n&#8211; Nh\u00f4m: Nh\u1eb9, ch\u1ed1ng \u0103n m\u00f2n t\u1ed1t; d\u1ec5 bi\u1ebfn d\u1ea1ng, gi\u00e3n n\u1edf cao, m\u00f3p do m\u01b0a \u0111\u00e1; c\u1ea7n x\u1eed l\u00fd c\u00e1ch \u0111i\u1ec7n khi l\u1eafp v\u1edbi th\u00e9p.<br \/>\n&#8211; PVC: R\u1ebb, d\u1ec5 l\u1eafp; l\u00e3o h\u00f3a d\u01b0\u1edbi UV\/nhi\u1ec7t; d\u1ec5 cong v\u00eanh, gi\u00f2n n\u1ee9t; kh\u00f4ng ph\u00f9 h\u1ee3p c\u00f4ng tr\u00ecnh cao c\u1ea5p\/d\u00e0i h\u1ea1n.<\/p>\n<h2 id=\"toc-3-tinh-toan-kich-thuoc-mang-xoi-va-ong-thoat\">T\u00ednh to\u00e1n k\u00edch th\u01b0\u1edbc m\u00e1ng x\u1ed1i v\u00e0 \u1ed1ng tho\u00e1t<\/h2>\n<p>Thi\u1ebft k\u1ebf \u0111\u00fang k\u00edch th\u01b0\u1edbc l\u00e0 y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh \u0111\u1ec3 tho\u00e1t n\u01b0\u1edbc an to\u00e0n, tr\u00e1nh tr\u00e0n m\u00e1i.<\/p>\n<h3>Nguy\u00ean t\u1eafc l\u01b0u l\u01b0\u1ee3ng<\/h3>\n<p>&#8211; C\u00f4ng th\u1ee9c c\u01a1 b\u1ea3n: Q = i \u00d7 A \u00d7 C<br \/>\n  &#8211; i: c\u01b0\u1eddng \u0111\u1ed9 m\u01b0a thi\u1ebft k\u1ebf (mm\/h)<br \/>\n  &#8211; A: di\u1ec7n t\u00edch m\u00e1i h\u1eefu hi\u1ec7u (m\u00b2)<br \/>\n  &#8211; C: h\u1ec7 s\u1ed1 d\u00f2ng ch\u1ea3y (kim lo\u1ea1i\/t\u00f4n: 0.9\u20131.0; ng\u00f3i: 0.7\u20130.85)<br \/>\n&#8211; Chu\u1ea9n tham chi\u1ebfu: TCVN 5576:2012 (h\u1ec7 th\u1ed1ng c\u1ea5p tho\u00e1t n\u01b0\u1edbc trong nh\u00e0), TCVN 4474:2012 (tho\u00e1t n\u01b0\u1edbc b\u00ean trong). C\u00f3 th\u1ec3 \u00e1p d\u1ee5ng EN 12056-3 cho ph\u01b0\u01a1ng ph\u00e1p t\u00ednh m\u00e1ng\/\u1ed1ng thu n\u01b0\u1edbc m\u00e1i.<br \/>\n  &#8211; EN 12056-3: https:\/\/standards.iteh.ai\/catalog\/standards\/cen\/ff6ac1f2-3d4f-4a12-9d1c-6e7a6e2fa0f1\/en-12056-3-2000<\/p>\n<p>G\u1ee3i \u00fd th\u1ef1c h\u00e0nh:<br \/>\n&#8211; Nh\u00e0 \u1edf \u0111\u00f4 th\u1ecb mi\u1ec1n B\u1eafc: i thi\u1ebft k\u1ebf th\u01b0\u1eddng 120\u2013180 mm\/h. H\u00e3y d\u00f9ng s\u1ed1 li\u1ec7u kh\u00ed t\u01b0\u1ee3ng \u0111\u1ecba ph\u01b0\u01a1ng ho\u1eb7c y\u00eau c\u1ea7u c\u1ee7a ch\u1ee7 \u0111\u1ea7u t\u01b0\/\u0111\u01a1n v\u1ecb thi\u1ebft k\u1ebf \u0111\u1ec3 x\u00e1c nh\u1eadn.<\/p>\n<h3>Ch\u1ecdn ti\u1ebft di\u1ec7n m\u00e1ng (quy \u0111\u1ed5i th\u1ef1c t\u1ebf)<\/h3>\n<p>&#8211; N\u0103ng l\u1ef1c tho\u00e1t n\u01b0\u1edbc t\u0103ng theo di\u1ec7n t\u00edch ti\u1ebft di\u1ec7n \u01b0\u1edbt v\u00e0 \u0111\u1ed9 d\u1ed1c m\u00e1ng (d\u1ed1c 0.5% th\u01b0\u1eddng l\u00e0 \u0111\u1ee7).<br \/>\n&#8211; Kinh nghi\u1ec7m th\u1ef1c h\u00e0nh tham chi\u1ebfu:<br \/>\n  &#8211; M\u00e1ng b\u00e1n nguy\u1ec7t 125 mm v\u1edbi d\u1ed1c 0.5% v\u00e0 1 \u1ed1ng D90 mm x\u1eed l\u00fd ~70\u201390 m\u00b2 m\u00e1i\/t\u1ed5 h\u1ee3p m\u01b0a \u0111\u00f4 th\u1ecb.<br \/>\n  &#8211; M\u00e1ng h\u1ed9p 150\u00d7100 mm v\u1edbi 1\u20132 \u1ed1ng D90\u2013110 mm x\u1eed l\u00fd ~120\u2013160 m\u00b2.<br \/>\n  &#8211; M\u00e1ng h\u1ed9p 200\u00d7125 mm v\u1edbi 2 \u1ed1ng D110 mm x\u1eed l\u00fd ~200\u2013260 m\u00b2.<br \/>\nL\u01b0u \u00fd: Gi\u00e1 tr\u1ecb ph\u1ee5 thu\u1ed9c v\u1ecb tr\u00ed \u1ed1ng x\u1ea3 (\u0111\u1ea7u\/mid), chi\u1ec1u d\u00e0i m\u00e1ng, t\u1ed5n th\u1ea5t c\u1ee5c b\u1ed9. Khi m\u00e1i l\u1edbn\/ph\u1ee9c t\u1ea1p, d\u00f9ng c\u00f4ng th\u1ee9c Manning ho\u1eb7c ph\u1ea7n m\u1ec1m th\u1ee7y l\u1ef1c \u0111\u1ec3 ki\u1ec3m tra.<\/p>\n<h3>V\u00ed d\u1ee5 t\u00ednh nhanh<\/h3>\n<p>&#8211; Gi\u1ea3 thi\u1ebft: M\u00e1i t\u00f4n 120 m\u00b2, i = 150 mm\/h, C = 0.95 \u2192 Q = 0.15 m\/h \u00d7 120 \u00d7 0.95 = 17.1 m\u00b3\/h \u2248 4.75 L\/s<br \/>\n&#8211; Gi\u1ea3i ph\u00e1p: M\u00e1ng h\u1ed9p 150\u00d7100 mm, d\u1ed1c 0.5%, 2 \u1ed1ng tho\u00e1t D90 mm \u0111\u1eb7t g\u1ea7n 2\/3 chi\u1ec1u d\u00e0i m\u00e1ng ho\u1eb7c 1 \u1ed1ng D110 mm \u1edf gi\u1eefa m\u00e1ng (b\u1ed1 tr\u00ed mi\u1ec7ng tr\u00e0n kh\u1ea9n c\u1ea5p).<\/p>\n<h2 id=\"toc-4-chi-tiet-thiet-ke-quan-trong-de-khong-bao-gio-ri\">Chi ti\u1ebft thi\u1ebft k\u1ebf quan tr\u1ecdng \u0111\u1ec3 \u201ckh\u00f4ng bao gi\u1edd r\u1ec9\u201d<\/h2>\n<p>&#8211; \u0110\u1ed9 d\u1ed1c m\u00e1ng: 0.3\u20130.7% (3\u20137 mm\/m). Chi\u1ec1u d\u00e0i >12 m n\u00ean chia nh\u1ecbp v\u00e0 b\u1ed1 tr\u00ed x\u1ea3 hai \u0111\u1ea7u.<br \/>\n&#8211; Gi\u00e3n n\u1edf nhi\u1ec7t: Inox 304 ~17.3 \u00b5m\/m.K. V\u1edbi \u2206T 40\u00b0C, \u0111o\u1ea1n 12 m gi\u00e3n n\u1edf \u2248 8.3 mm. B\u1ed1 tr\u00ed joint tr\u01b0\u1ee3t\/\u1ed1ng n\u1ed1i c\u00f3 khe gi\u00e3n n\u1edf, keo \u0111\u00e0n h\u1ed3i trung t\u00ednh; kh\u00f4ng kh\u00f3a c\u1ee9ng c\u1ea3 hai \u0111\u1ea7u.<br \/>\n&#8211; Kho\u1ea3ng c\u00e1ch gi\u00e1 \u0111\u1ee1: 600\u2013900 mm (m\u00e1i tuy\u1ebft\/gi\u00f3 l\u1edbn: 400\u2013600 mm). T\u0103ng \u0111\u1ee1 t\u1ea1i v\u1ecb tr\u00ed \u1ed1ng x\u1ea3\/g\u00f3c chuy\u1ec3n h\u01b0\u1edbng.<br \/>\n&#8211; Ch\u1ed1ng tr\u00e0n: Mi\u1ec7ng tr\u00e0n kh\u1ea9n c\u1ea5p (overflow) cao h\u01a1n \u0111\u00e1y m\u00e1ng \u226525\u201340 mm, h\u01b0\u1edbng xa t\u01b0\u1eddng. \u0110\u1eb7c bi\u1ec7t quan tr\u1ecdng v\u1edbi m\u00e1ng \u00e2m.<br \/>\n&#8211; Ch\u1ed1ng \u0103n m\u00f2n \u0111i\u1ec7n h\u00f3a: T\u00e1ch inox v\u1edbi kim lo\u1ea1i kh\u00f4ng t\u01b0\u01a1ng th\u00edch b\u1eb1ng \u0111\u1ec7m nh\u1ef1a\/EPDM; kh\u00f4ng d\u00f9ng v\u00edt th\u00e9p carbon m\u1ea1 k\u1ebdm xuy\u00ean tr\u1ef1c ti\u1ebfp th\u00e2n m\u00e1ng.<br \/>\n&#8211; Gio\u0103ng v\u00e0 keo: EPDM + silicone trung t\u00ednh. Tr\u00e1nh PU ch\u1ee9a dung m\u00f4i m\u1ea1nh, tr\u00e1nh keo axit tr\u00ean m\u1ed1i h\u00e0n.<br \/>\n&#8211; L\u01b0\u1edbi ch\u1eafn r\u00e1c: L\u1eafp l\u00e1 ch\u1eafn\/l\u01b0\u1edbi inox \u0111\u1ec3 gi\u1ea3m t\u1eafc ngh\u1ebdn, nh\u1ea5t l\u00e0 m\u00e1i nhi\u1ec1u c\u00e2y.<\/p>\n<h2 id=\"toc-5-quy-trinh-lap-dat-chuan-ben-30-nam\">Quy tr\u00ecnh l\u1eafp \u0111\u1eb7t chu\u1ea9n \u2013 b\u1ec1n 30+ n\u0103m<\/h2>\n<p>1) Kh\u1ea3o s\u00e1t v\u00e0 \u0111o \u0111\u1ea1c<br \/>\n&#8211; X\u00e1c \u0111\u1ecbnh di\u1ec7n t\u00edch m\u00e1i h\u1eefu hi\u1ec7u, \u0111i\u1ec3m x\u1ea3 \u01b0u ti\u00ean, cao \u0111\u1ed9 ho\u00e0n thi\u1ec7n v\u00e0 \u0111\u01b0\u1eddng d\u1ed1c.<br \/>\n2) Gia c\u00f4ng<br \/>\n&#8211; C\u1eaft b\u1eb1ng dao\/c\u1eaft \u0111\u0129a m\u1ea3nh chuy\u00ean d\u1ee5ng \u0111\u1ec3 h\u1ea1n ch\u1ebf bi\u1ebfn m\u00e0u c\u1ea1nh c\u1eaft.<br \/>\n&#8211; U\u1ed1n m\u00e9p hem 10\u201315 mm t\u0103ng c\u1ee9ng. B\u00e1n k\u00ednh u\u1ed1n t\u1ed1i thi\u1ec3u \u22651\u00d7 chi\u1ec1u d\u00e0y t\u1ea5m \u0111\u1ec3 tr\u00e1nh r\u1ea1n.<br \/>\n3) Li\u00ean k\u1ebft<br \/>\n&#8211; H\u00e0n TIG (GTAW) v\u1edbi d\u00e2y ER308L cho m\u1ed1i k\u00edn; ho\u1eb7c \u0111inh t\u00e1n inox + gio\u0103ng EPDM + keo silicone trung t\u00ednh.<br \/>\n&#8211; Sau h\u00e0n: t\u1ea9y g\u1ec9 \u2013 th\u1ee5 \u0111\u1ed9ng (pickling\/passivation) v\u00f9ng \u1ea3nh h\u01b0\u1edfng nhi\u1ec7t \u0111\u1ec3 kh\u00f4i ph\u1ee5c m\u00e0ng th\u1ee5 \u0111\u1ed9ng (theo khuy\u1ebfn ngh\u1ecb Nickel Institute).<br \/>\n4) L\u1eafp \u0111\u1eb7t<br \/>\n&#8211; G\u1eafn gi\u00e1 \u0111\u1ee1 theo d\u00e2y c\u1eef t\u1ea1o d\u1ed1c; si\u1ebft l\u1ef1c v\u1eeba \u0111\u1ee7, tr\u00e1nh b\u00f3p m\u00e9o.<br \/>\n&#8211; \u0110\u1ee5c\/c\u1eaft l\u1ed7 x\u1ea3, loe m\u00e9p ch\u1ed1ng xo\u00e1y; l\u1eafp ph\u1ec5u x\u1ea3\/\u1ed1ng \u0111\u1ee9ng v\u1edbi c\u1ed5 d\u00ea inox v\u00e0 \u0111\u1ec7m EPDM.<br \/>\n5) Ki\u1ec3m tra \u2013 nghi\u1ec7m thu<br \/>\n&#8211; Th\u1eed n\u01b0\u1edbc li\u00ean t\u1ee5c \u226515 ph\u00fat \u1edf c\u01b0\u1eddng \u0111\u1ed9 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng m\u01b0a l\u1edbn; ki\u1ec3m tra r\u00f2 r\u1ec9, \u0111\u1ecdng n\u01b0\u1edbc, \u0111\u1ed9 \u1ed3n b\u1ea5t th\u01b0\u1eddng.<\/p>\n<p>Ngu\u1ed3n th\u1ef1c h\u00e0nh: Nickel Institute (fabrication\/welding best practice): https:\/\/www.nickelinstitute.org<\/p>\n<h2 id=\"toc-6-bao-tri-toi-thieu-nhung-can-dung-cach\">B\u1ea3o tr\u00ec t\u1ed1i thi\u1ec3u nh\u01b0ng c\u1ea7n \u0111\u00fang c\u00e1ch<\/h2>\n<p>&#8211; V\u1ec7 sinh: 3\u20136 th\u00e1ng\/l\u1ea7n (th\u01b0\u1eddng xuy\u00ean h\u01a1n \u1edf \u0111\u00f4 th\u1ecb \u00f4 nhi\u1ec5m\/ven bi\u1ec3n). R\u1eeda n\u01b0\u1edbc s\u1ea1ch, b\u00e0n ch\u1ea3i m\u1ec1m, x\u00e0 ph\u00f2ng trung t\u00ednh. Tr\u00e1nh ch\u1ea5t t\u1ea9y Clo\/axit m\u1ea1nh.<br \/>\n&#8211; Ki\u1ec3m tra: M\u1ed1i n\u1ed1i, gio\u0103ng, gi\u00e1 \u0111\u1ee1, l\u01b0\u1edbi ch\u1eafn r\u00e1c. Thay keo khi chai n\u1ee9t. D\u1ecdn l\u00e1\/t\u1ed5n th\u01b0\u01a1ng sau b\u00e3o.<br \/>\n&#8211; Ng\u0103n \u1ed1 b\u1ec1 m\u1eb7t (tea staining): Ch\u1ecdn b\u1ec1 m\u1eb7t m\u1ecbn; r\u1eeda \u0111\u1ecbnh k\u1ef3; tr\u00e1nh t\u00edch t\u1ee5 mu\u1ed1i\/b\u1ee5i. Ven bi\u1ec3n \u01b0u ti\u00ean 316 ho\u1eb7c x\u1eed l\u00fd b\u1ec1 m\u1eb7t cao h\u01a1n.<br \/>\n&#8211; Kh\u00f4ng c\u1ea7n s\u01a1n ph\u1ee7 b\u1ea3o v\u1ec7; n\u1ebfu s\u01a1n trang tr\u00ed, d\u00f9ng h\u1ec7 s\u01a1n t\u01b0\u01a1ng th\u00edch inox v\u00e0 theo d\u00f5i bong tr\u00f3c.<\/p>\n<h2 id=\"toc-7-chi-phi-va-loi-ich-vong-doi\">Chi ph\u00ed v\u00e0 l\u1ee3i \u00edch v\u00f2ng \u0111\u1eddi<\/h2>\n<p>&#8211; \u0110\u1ea7u t\u01b0 ban \u0111\u1ea7u: Inox 304 cao h\u01a1n ~20\u201360% so v\u1edbi t\u00f4n m\u1ea1 k\u1ebdm\/PVC t\u00f9y \u0111\u1ed9 d\u00e0y v\u00e0 ho\u00e0n thi\u1ec7n.<br \/>\n&#8211; V\u00f2ng \u0111\u1eddi 30+ n\u0103m: Kh\u00f4ng s\u01a1n l\u1ea1i, kh\u00f4ng thay \u0111\u1ecbnh k\u1ef3, gi\u1ea3m r\u1ee7i ro th\u1ea5m d\u1ed9t\/t\u1ed5n th\u1ea5t n\u1ed9i th\u1ea5t.<br \/>\n&#8211; V\u00ed d\u1ee5 LCC (gi\u1ea3 \u0111\u1ecbnh 20 n\u0103m, 120 m\u00b2 m\u00e1i):<br \/>\n  &#8211; PA (t\u00f4n m\u1ea1 k\u1ebdm): Chi ph\u00ed \u0111\u1ea7u 100%, s\u01a1n\/b\u1ea3o tr\u00ec 5 n\u0103m\/l\u1ea7n \u00d73, thay c\u1ee5c b\u1ed9: t\u1ed5ng ~170\u2013190%.<br \/>\n  &#8211; PB (inox 304): Chi ph\u00ed \u0111\u1ea7u 150%, b\u1ea3o tr\u00ec v\u1ec7 sinh \u0111\u1ecbnh k\u1ef3: t\u1ed5ng ~155\u2013160%.<br \/>\nK\u1ebft lu\u1eadn: Inox 304 c\u00f3 t\u1ed5ng chi ph\u00ed s\u1edf h\u1eefu th\u1ea5p h\u01a1n, \u0111\u1eb7c bi\u1ec7t khi t\u00ednh r\u1ee7i ro h\u01b0 h\u1ea1i do r\u00f2 r\u1ec9.<\/p>\n<h2 id=\"toc-8-cau-hoi-thuong-gap\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<p>&#8211; 304 hay 304L? C\u1ea3 hai \u0111\u1ec1u ph\u00f9 h\u1ee3p; 304L t\u1ed1i \u01b0u khi h\u00e0n nhi\u1ec1u, gi\u1ea3m nguy c\u01a1 \u0103n m\u00f2n v\u00f9ng \u1ea3nh h\u01b0\u1edfng nhi\u1ec7t.<br \/>\n&#8211; C\u00f3 c\u1ea7n s\u01a1n kh\u00f4ng? Kh\u00f4ng. Ch\u1ec9 v\u1ec7 sinh \u0111\u1ecbnh k\u1ef3 \u0111\u1ec3 gi\u1eef th\u1ea9m m\u1ef9.<br \/>\n&#8211; G\u1ea7n bi\u1ec3n d\u00f9ng 304 \u0111\u01b0\u1ee3c kh\u00f4ng? \u22645 km ven bi\u1ec3n n\u00ean d\u00f9ng 316 ho\u1eb7c ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t cao + r\u1eeda th\u01b0\u1eddng xuy\u00ean \u0111\u1ec3 tr\u00e1nh tea staining (Nickel Institute).<br \/>\n&#8211; Ti\u1ebfng \u1ed3n m\u01b0a? D\u00f9ng \u0111\u1ed9 d\u00e0y \u22650.6\u20130.7 mm, t\u0103ng \u0111\u1ee1, l\u00f3t EPDM t\u1ea1i gi\u00e1 \u0111\u1ee1 gi\u00fap gi\u1ea3m \u1ed3n.<br \/>\n&#8211; Keo n\u00e0o ph\u00f9 h\u1ee3p? Silicone trung t\u00ednh (neutral-cure), EPDM; tuy\u1ec7t \u0111\u1ed1i tr\u00e1nh keo axit l\u00ean inox.<\/p>\n<h2 id=\"toc-9-khi-nao-nen-chon-inox-316-thay-cho-304\">Khi n\u00e0o n\u00ean ch\u1ecdn inox 316 thay cho 304?<\/h2>\n<p>&#8211; C\u00f4ng tr\u00ecnh \u22645 km t\u00ednh t\u1eeb bi\u1ec3n\/x\u01b0\u1edfng h\u00f3a ch\u1ea5t\/b\u1ec3 b\u01a1i; khu c\u00f4ng nghi\u1ec7p ph\u00e1t th\u1ea3i clorua; m\u1eb7t ti\u1ec1n k\u00edn gi\u00f3 d\u1ec5 t\u00edch mu\u1ed1i. 316 (2\u20132.5% Mo) t\u0103ng m\u1ea1nh kh\u1ea3 n\u0103ng ch\u1ed1ng pitting\/crevice trong m\u00f4i tr\u01b0\u1eddng clorua.<\/p>\n<h2 id=\"toc-10-ket-luan\">K\u1ebft lu\u1eadn<\/h2>\n<p>M\u00e1ng x\u1ed1i inox 304 l\u00e0 \u201cgi\u1ea3i ph\u00e1p d\u1ee9t \u0111i\u1ec3m\u201d cho b\u00e0i to\u00e1n r\u1ec9 s\u00e9t m\u00e1i: v\u1eadt li\u1ec7u \u0111\u00fang chu\u1ea9n (ASTM A240), thi\u1ebft k\u1ebf chu\u1ea9n th\u1ee7y l\u1ef1c (Q = i\u00d7A\u00d7C, d\u1ed1c 0.3\u20130.7%), l\u1eafp \u0111\u1eb7t theo th\u1ef1c h\u00e0nh t\u1ed1t (h\u00e0n TIG\/\u0111inh t\u00e1n inox, keo trung t\u00ednh, m\u1ed1i n\u1ed1i gi\u00e3n n\u1edf), v\u00e0 b\u1ea3o tr\u00ec t\u1ed1i thi\u1ec3u. So v\u1edbi m\u1ea1 k\u1ebdm\/PVC, 304 c\u00f3 chi ph\u00ed v\u00f2ng \u0111\u1eddi th\u1ea5p h\u01a1n, \u0111\u1ed9 tin c\u1eady cao, th\u1ea9m m\u1ef9 b\u1ec1n b\u1ec9 30+ n\u0103m. V\u1edbi c\u00f4ng tr\u00ecnh ven bi\u1ec3n\/clorua cao, c\u00e2n nh\u1eafc 316 \u0111\u1ec3 duy tr\u00ec b\u1ec1 m\u1eb7t kh\u00f4ng \u1ed1.<\/p>\n<p>C\u1ea7n b\u1ea3ng ch\u1ecdn k\u00edch th\u01b0\u1edbc theo m\u00e1i th\u1ef1c t\u1ebf, t\u1ed1i \u01b0u \u0111\u1ed9 d\u00e0y v\u00e0 gi\u1ea3i ph\u00e1p li\u00ean k\u1ebft? Li\u00ean h\u1ec7 Inox Cuong Thinh \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n k\u1ef9 thu\u1eadt v\u00e0 b\u00e1o gi\u00e1 t\u1ed1t nh\u1ea5t.<br \/>\n&#8211; Hotline: 0343.417.281<br \/>\n&#8211; Email: inoxcongnghiep.cuongthinh@gmail.com<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Gi\u1ea3i ph\u00e1p m\u00e1ng x\u1ed1i inox 304 ch\u1ed1ng r\u1ec9 s\u00e9t v\u0129nh vi\u1ec5n: ti\u00eau chu\u1ea9n v\u1eadt li\u1ec7u, t\u00ednh to\u00e1n k\u00edch th\u01b0\u1edbc, l\u1eafp \u0111\u1eb7t \u0111\u00fang k\u1ef9 thu\u1eadt, b\u1ea3o tr\u00ec t\u1ed1i thi\u1ec3u, chi ph\u00ed v\u00f2ng \u0111\u1eddi t\u1ed1i \u01b0u.<\/p>\n","protected":false},"author":7,"featured_media":1066,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-1713","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\/1713","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=1713"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/1713\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1066"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=1713"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=1713"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=1713"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}