{"id":1981,"date":"2026-05-05T00:34:31","date_gmt":"2026-05-04T17:34:31","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/inox-trong-xu-ly-va-cap-nuoc-sach-giam-ro-ri-that-thoat-hieu-qua\/"},"modified":"2026-05-05T00:34:31","modified_gmt":"2026-05-04T17:34:31","slug":"inox-trong-xu-ly-va-cap-nuoc-sach-giam-ro-ri-that-thoat-hieu-qua","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/inox-trong-xu-ly-va-cap-nuoc-sach-giam-ro-ri-that-thoat-hieu-qua\/","title":{"rendered":"Inox trong x\u1eed l\u00fd v\u00e0 c\u1ea5p n\u01b0\u1edbc s\u1ea1ch: gi\u1ea3m r\u00f2 r\u1ec9, th\u1ea5t tho\u00e1t hi\u1ec7u qu\u1ea3"},"content":{"rendered":"<div class=\"custom-toc\">\n<h3>N\u1ed9i dung ch\u00ednh<\/h3>\n<ul>\n<li><a href=\"#toc-0-vi-sao-inox-giup-giam-that-thoat-nuoc\">V\u00ec sao inox gi\u00fap gi\u1ea3m th\u1ea5t tho\u00e1t n\u01b0\u1edbc?<\/a><\/li>\n<li><a href=\"#toc-1-ung-dung-inox-theo-tung-khau-he-thong-nuoc-sach\">\u1ee8ng d\u1ee5ng inox theo t\u1eebng kh\u00e2u h\u1ec7 th\u1ed1ng n\u01b0\u1edbc s\u1ea1ch<\/a><\/li>\n<li><a href=\"#toc-2-lua-chon-mac-inox-va-gioi-han-nuoc-phu-hop\">L\u1ef1a ch\u1ecdn m\u00e1c inox v\u00e0 gi\u1edbi h\u1ea1n n\u01b0\u1edbc ph\u00f9 h\u1ee3p<\/a><\/li>\n<li><a href=\"#toc-3-thiet-ke-va-thi-cong-de-toi-uu-kin-nuoc\">Thi\u1ebft k\u1ebf v\u00e0 thi c\u00f4ng \u0111\u1ec3 t\u1ed1i \u01b0u k\u00edn n\u01b0\u1edbc<\/a><\/li>\n<li><a href=\"#toc-4-so-sanh-nhanh-inox-voi-cac-vat-lieu-pho-bien\">So s\u00e1nh nhanh inox v\u1edbi c\u00e1c v\u1eadt li\u1ec7u ph\u1ed5 bi\u1ebfn<\/a><\/li>\n<li><a href=\"#toc-5-loi-ich-dinh-luong-ton-that-ma-sat-va-hoan-von\">L\u1ee3i \u00edch \u0111\u1ecbnh l\u01b0\u1ee3ng: t\u1ed5n th\u1ea5t ma s\u00e1t v\u00e0 ho\u00e0n v\u1ed1n<\/a><\/li>\n<li><a href=\"#toc-6-case-study-quoc-te-tieu-bieu\">Case study qu\u1ed1c t\u1ebf ti\u00eau bi\u1ec3u<\/a><\/li>\n<li><a href=\"#toc-7-checklist-lua-chon-va-dat-mua-inox-cho-du-an-cap-n\">Checklist l\u1ef1a ch\u1ecdn v\u00e0 \u0111\u1eb7t mua inox cho d\u1ef1 \u00e1n c\u1ea5p n\u01b0\u1edbc<\/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-tai-lieu-tham-khao-chon-loc\">T\u00e0i li\u1ec7u tham kh\u1ea3o ch\u1ecdn l\u1ecdc<\/a><\/li>\n<li><a href=\"#toc-10-ket-luan\">K\u1ebft lu\u1eadn<\/a><\/li>\n<\/ul>\n<\/div>\n<p>C\u00e1c h\u1ec7 th\u1ed1ng x\u1eed l\u00fd v\u00e0 c\u1ea5p n\u01b0\u1edbc s\u1ea1ch \u0111ang ch\u1ecbu \u00e1p l\u1ef1c ph\u1ea3i gi\u1ea3m th\u1ea5t tho\u00e1t th\u1ea5t thu (NRW) v\u00e0 v\u1eadn h\u00e0nh b\u1ec1n v\u1eefng. Inox (th\u00e9p kh\u00f4ng g\u1ec9) l\u00e0 v\u1eadt li\u1ec7u then ch\u1ed1t gi\u00fap gi\u1ea3m r\u00f2 r\u1ec9, \u1ed5n \u0111\u1ecbnh ch\u1ea5t l\u01b0\u1ee3ng n\u01b0\u1edbc v\u00e0 t\u1ed1i \u01b0u chi ph\u00ed v\u00f2ng \u0111\u1eddi. B\u00e0i vi\u1ebft n\u00e0y t\u1ed5ng h\u1ee3p kinh nghi\u1ec7m th\u1ef1c t\u1ebf, ti\u00eau chu\u1ea9n k\u1ef9 thu\u1eadt v\u00e0 c\u00e1ch l\u1ef1a ch\u1ecdn-\u1ee9ng d\u1ee5ng inox t\u1eeb nh\u00e0 m\u00e1y x\u1eed l\u00fd t\u1edbi m\u1ea1ng l\u01b0\u1edbi ph\u00e2n ph\u1ed1i, nh\u1eb1m \u0111em l\u1ea1i m\u1ed9t h\u01b0\u1edbng d\u1eabn \u0111\u1ea7y \u0111\u1ee7 v\u00e0 c\u00f3 th\u1ec3 tri\u1ec3n khai ngay. \u0110\u00e2y c\u0169ng l\u00e0 m\u1ed9t v\u00ed d\u1ee5 ti\u00eau bi\u1ec3u v\u1ec1 v\u1eadt li\u1ec7u b\u1ec1n v\u1eefng trong b\u1ee9c tranh c\u00f4ng tr\u00ecnh xanh v\u00e0 kinh t\u1ebf tu\u1ea7n ho\u00e0n.<\/p>\n<h2 id=\"toc-0-vi-sao-inox-giup-giam-that-thoat-nuoc\">V\u00ec sao inox gi\u00fap gi\u1ea3m th\u1ea5t tho\u00e1t n\u01b0\u1edbc?<\/h2>\n<h3>1) Ch\u1ed1ng \u0103n m\u00f2n v\u00e0 th\u1ee7ng l\u1ed7 (pitting\/crevice)<\/h3>\n<p>&#8211; Inox c\u00f3 l\u1edbp th\u1ee5 \u0111\u1ed9ng Cr2O3 t\u1ef1 ph\u1ee5c h\u1ed3i, b\u1ec1n v\u1edbi h\u1ea7u h\u1ebft m\u00f4i tr\u01b0\u1eddng n\u01b0\u1edbc sinh ho\u1ea1t v\u00e0 nhi\u1ec1u h\u00f3a ch\u1ea5t x\u1eed l\u00fd (cloramin, ozone).<br \/>\n&#8211; So v\u1edbi th\u00e9p m\u1ea1 k\u1ebdm\/\u1ed1ng gang, inox kh\u00f4ng b\u1ecb \u201cth\u1ee7ng kim\u201d do pitting trong n\u01b0\u1edbc ch\u1ee9a chloride \u1edf m\u1ee9c ph\u00f9 h\u1ee3p v\u1edbi m\u00e1c th\u00e9p, gi\u1ea3m r\u00f2 r\u1ec9 v\u00f4 h\u00ecnh qua th\u00e0nh \u1ed1ng v\u00e0 ph\u1ee5 ki\u1ec7n.<\/p>\n<h3>2) \u0110\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc v\u00e0 dai va \u0111\u1eadp cao<\/h3>\n<p>&#8211; Gi\u1edbi h\u1ea1n ch\u1ea3y\/\u0111\u1ed9 b\u1ec1n k\u00e9o v\u00e0 \u0111\u1ed9 dai v\u01b0\u1ee3t tr\u1ed9i gi\u00fap \u1ed1ng ch\u1ecbu t\u1ed1t qu\u00e1 \u00e1p, b\u00faa n\u01b0\u1edbc, l\u00fan n\u1ec1n v\u00e0 rung \u0111\u1ed9ng.<br \/>\n&#8211; \u00cdt n\u1ee9t g\u00e3y do t\u1ea3i tr\u1ecdng l\u1eb7p, gi\u1ea3m s\u1ef1 c\u1ed1 v\u1ee1 \u1ed1ng g\u00e2y th\u1ea5t tho\u00e1t l\u1edbn.<\/p>\n<h3>3) M\u1ed1i n\u1ed1i k\u00edn tin c\u1eady, \u00edt \u0111i\u1ec3m r\u1ee7i ro<\/h3>\n<p>&#8211; H\u1ec7 th\u1ed1ng n\u1ed1i h\u00e0n (TIG\/orbital), press-fit inox (O-ring EPDM \u0111\u1ea1t NSF\/WRAS), ho\u1eb7c r\u00e3nh (grooved) ch\u1ea5t l\u01b0\u1ee3ng cao cho \u0111\u1ed9 k\u00edn l\u00e2u d\u00e0i.<br \/>\n&#8211; B\u1ec1 m\u1eb7t \u1ed1ng inox cho ph\u00e9p ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng h\u00e0n v\u00e0 th\u1ea9m tra NDT d\u1ec5 d\u00e0ng, gi\u1ea3m l\u1ed7i l\u1eafp \u0111\u1eb7t \u2014 nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn c\u1ee7a r\u00f2 r\u1ec9.<\/p>\n<h3>4) B\u1ec1 m\u1eb7t nh\u1eb5n, \u00edt b\u00e1m c\u1eb7n\/biofilm<\/h3>\n<p>&#8211; \u0110\u1ed9 nh\u00e1m th\u00e0nh \u1ed1ng r\u1ea5t th\u1ea5p v\u00e0 \u1ed5n \u0111\u1ecbnh theo th\u1eddi gian, h\u1ea1n ch\u1ebf \u0111\u00f3ng c\u1eb7n, gi\u1ea3m ch\u00eanh \u00e1p v\u00e0 hi\u1ec7n t\u01b0\u1ee3ng \u0103n m\u00f2n vi sinh (MIC).<br \/>\n&#8211; \u00cdt b\u00e1m b\u1ea9n gi\u00fap duy tr\u00ec t\u00ecnh tr\u1ea1ng th\u1ee7y l\u1ef1c, gi\u1ea3m nhu c\u1ea7u x\u1ea3 c\u1eb7n, h\u1ea1n ch\u1ebf h\u01b0 h\u1ea1i m\u1ed1i n\u1ed1i do rung\/\u00e1p l\u1ef1c b\u1ea5t th\u01b0\u1eddng.<\/p>\n<h3>5) Tu\u1ed5i th\u1ecd d\u00e0i v\u00e0 chi ph\u00ed v\u00f2ng \u0111\u1eddi th\u1ea5p<\/h3>\n<p>&#8211; D\u00f9 CAPEX cao h\u01a1n m\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u, inox cho OPEX th\u1ea5p: \u00edt s\u1eeda ch\u1eefa, \u00edt thay th\u1ebf, ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng b\u01a1m nh\u1edd t\u1ed5n th\u1ea5t ma s\u00e1t th\u1ea5p, gi\u1ea3m n\u01b0\u1edbc th\u1ea5t tho\u00e1t.<br \/>\n&#8211; T\u00e1i ch\u1ebf 100% cu\u1ed1i v\u00f2ng \u0111\u1eddi, ph\u00f9 h\u1ee3p m\u1ee5c ti\u00eau c\u00f4ng tr\u00ecnh xanh.<\/p>\n<h2 id=\"toc-1-ung-dung-inox-theo-tung-khau-he-thong-nuoc-sach\">\u1ee8ng d\u1ee5ng inox theo t\u1eebng kh\u00e2u h\u1ec7 th\u1ed1ng n\u01b0\u1edbc s\u1ea1ch<\/h2>\n<h3>1) C\u00f4ng tr\u00ecnh thu v\u00e0 tuy\u1ebfn \u1ed1ng d\u1eabn th\u00f4<\/h3>\n<p>&#8211; \u1ed0ng v\u00e0 ph\u1ee5 ki\u1ec7n inox 316L\/duplex 2205 \u1edf m\u00f4i tr\u01b0\u1eddng nhi\u1ec5m m\u1eb7n\/c\u1eadn bi\u1ec3n, khu v\u1ef1c \u0111\u1ea5t \u1ea9m, x\u00e2m th\u1ef1c.<br \/>\n&#8211; Van, r\u1ecd b\u01a1m, song ch\u1eafn, k\u1ebft c\u1ea5u ti\u1ebfp x\u00fac n\u01b0\u1edbc l\u1ee3\/gi\u00e0u chloride: \u01b0u ti\u00ean m\u00e1c c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng r\u1ed7 t\u1ed1t (PREN cao h\u01a1n).<\/p>\n<h3>2) Nh\u00e0 m\u00e1y x\u1eed l\u00fd n\u01b0\u1edbc<\/h3>\n<p>&#8211; B\u1ec3 keo t\u1ee5-t\u1ea1o b\u00f4ng, \u1ed1ng h\u00f3a ch\u1ea5t (PAC, NaOCl), thang m\u00e1ng, lan can: 304L cho khu v\u1ef1c chloride th\u1ea5p; 316L cho clo\/th\u1ee7y tri\u1ec1u chloride cao.<br \/>\n&#8211; C\u00f4ng \u0111o\u1ea1n kh\u1eed tr\u00f9ng UV\/ozone, RO\/UF: 316L\/duplex cho skid \u00e1p l\u1ef1c, \u1ed1ng CIP. L\u01b0u \u00fd h\u1ea1n ch\u1ebf nhi\u1ec7t \u0111\u1ed9\/clo t\u1ef1 do cao \u0111\u1ec3 tr\u00e1nh SCC v\u1edbi austenitic.<br \/>\n&#8211; B\u1ed3n ch\u1ee9a, \u0111\u01b0\u1eddng \u1ed1ng c\u00f4ng ngh\u1ec7 theo ASTM A312\/A778; ph\u1ee5 ki\u1ec7n ASTM A403; x\u1eed l\u00fd b\u1ec1 m\u1eb7t pickling\u2013passivation \u0111\u1ea3m b\u1ea3o l\u1edbp th\u1ee5 \u0111\u1ed9ng to\u00e0n v\u1eb9n (ASTM A380\/A967).<\/p>\n<h3>3) Truy\u1ec1n t\u1ea3i v\u00e0 ph\u00e2n ph\u1ed1i<\/h3>\n<p>&#8211; \u1ed0ng truy\u1ec1n t\u1ea3i: AWWA C220 (stainless-steel pipe for water transmission and distribution) ho\u1eb7c ASTM A312, m\u1ed1i n\u1ed1i h\u00e0n\/grooved\/flange cho DN l\u1edbn.<br \/>\n&#8211; \u1ed0ng ph\u00e2n ph\u1ed1i v\u00e0 d\u1ecbch v\u1ee5 (service line): \u1ed0ng m\u1ecfng EN 10312 v\u00e0 \u1ed1ng inox g\u00e2n (corrugated) cho nh\u00e1nh h\u1ed9 gia \u0111\u00ecnh\/chung c\u01b0, gi\u1ea3m s\u1ed1 m\u1ed1i n\u1ed1i v\u00e0 ch\u1ecbu bi\u1ebfn d\u1ea1ng n\u1ec1n t\u1ed1t.<br \/>\n&#8211; Tr\u1ea1m b\u01a1m, \u0111\u1ed3ng h\u1ed3, DMA: ph\u1ee5 ki\u1ec7n inox h\u1ea1n ch\u1ebf r\u00f2 r\u1ec9 c\u1ee5c b\u1ed9 v\u00e0 \u0103n m\u00f2n galvanic.<\/p>\n<h2 id=\"toc-2-lua-chon-mac-inox-va-gioi-han-nuoc-phu-hop\">L\u1ef1a ch\u1ecdn m\u00e1c inox v\u00e0 gi\u1edbi h\u1ea1n n\u01b0\u1edbc ph\u00f9 h\u1ee3p<\/h2>\n<p>&#8211; 304\/304L: N\u01b0\u1edbc s\u1ea1ch \u0111\u00f4 th\u1ecb, chloride th\u1ea5p\u2013trung b\u00ecnh. Th\u1ef1c h\u00e0nh qu\u1ed1c t\u1ebf th\u01b0\u1eddng khuy\u1ebfn ngh\u1ecb Cl\u2212 kho\u1ea3ng \u2264200 mg\/L \u1edf nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng khi thi\u1ebft k\u1ebf tr\u00e1nh khe h\u1edf\/m\u00f4i tr\u01b0\u1eddng \u0111\u1ecdng.<br \/>\n&#8211; 316\/316L (Mo ~2%): Ch\u1ed1ng r\u1ed7\/\u0103n m\u00f2n khe t\u1ed1t h\u01a1n, ph\u00f9 h\u1ee3p n\u01b0\u1edbc c\u00f3 chloride cao h\u01a1n (nhi\u1ec1u nh\u00e0 m\u00e1y ven bi\u1ec3n l\u1ef1a ch\u1ecdn m\u1eb7c \u0111\u1ecbnh).<br \/>\n&#8211; Duplex 2205: PREN r\u1ea5t cao, cho m\u00f4i tr\u01b0\u1eddng chloride kh\u1eafc nghi\u1ec7t, n\u01b0\u1edbc l\u1ee3\/ti\u1ec1n kh\u1eed m\u1eb7n, h\u1ec7 RO cao \u00e1p.<br \/>\n&#8211; Ferritic 444: Gi\u1ea3i ph\u00e1p ti\u1ebft ki\u1ec7m cho m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng b\u1ed3n\/thi\u1ebft b\u1ecb ph\u1ee5, c\u1ea7n \u0111\u00e1nh gi\u00e1 chi ti\u1ebft n\u01b0\u1edbc v\u00e0 m\u1ed1i n\u1ed1i.<\/p>\n<p>G\u1ee3i \u00fd th\u1ef1c h\u00e0nh an to\u00e0n: \u01b0u ti\u00ean 316L cho khu v\u1ef1c c\u00f3 nguy c\u01a1 chloride\/\u0111i\u1ec3m \u0111\u1ecdng; tr\u00e1nh \u201ckhe h\u1edf\u201d (crevice) \u1edf gi\u00e1 \u0111\u1ee1 v\u00e0 l\u1eafp \u0111\u1eb7t; ki\u1ec3m so\u00e1t clo t\u1ef1 do, nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh.<\/p>\n<h3>Ti\u00eau chu\u1ea9n v\u00e0 ch\u1ee9ng nh\u1eadn li\u00ean quan<\/h3>\n<p>&#8211; \u1ed0ng inox: AWWA C220; ASTM A312\/A778; EN 10312 (\u1ed1ng m\u1ecfng d\u00f9ng cho n\u01b0\u1edbc).<br \/>\n&#8211; Ph\u1ee5 ki\u1ec7n: ASTM A403; m\u1eb7t b\u00edch: ASTM A182; bul\u00f4ng: ASTM A193\/A194.<br \/>\n&#8211; V\u1eadt li\u1ec7u ti\u1ebfp x\u00fac n\u01b0\u1edbc u\u1ed1ng: NSF\/ANSI\/CAN 61 (B\u1eafc M\u1ef9), WRAS\/4MS (EU), DVGW W270 (kh\u1ea3 n\u0103ng h\u1ea1n ch\u1ebf ph\u00e1t tri\u1ec3n vi sinh).<br \/>\n&#8211; Ch\u1ea5t l\u01b0\u1ee3ng n\u01b0\u1edbc sinh ho\u1ea1t t\u1ea1i Vi\u1ec7t Nam: QCVN 01-1:2018\/BYT.<\/p>\n<h2 id=\"toc-3-thiet-ke-va-thi-cong-de-toi-uu-kin-nuoc\">Thi\u1ebft k\u1ebf v\u00e0 thi c\u00f4ng \u0111\u1ec3 t\u1ed1i \u01b0u k\u00edn n\u01b0\u1edbc<\/h2>\n<h3>1) Kh\u1ea3o s\u00e1t v\u00e0 ti\u1ec1n thi\u1ebft k\u1ebf<\/h3>\n<p>&#8211; Ph\u00e2n t\u00edch n\u01b0\u1edbc: Cl\u2212, SO4 2\u2212, pH, \u0111\u1ed9 ki\u1ec1m, TDS, clo d\u01b0, nhi\u1ec7t \u0111\u1ed9.<br \/>\n&#8211; Ph\u00e2n t\u00edch \u0111\u1ea5t\/\u0111i\u1ec7n h\u00f3a: \u0111i\u1ec7n tr\u1edf su\u1ea5t, \u0111\u1ed9 \u1ea9m, r\u1ee7i ro nhi\u1ec5m m\u1eb7n.<br \/>\n&#8211; L\u1ef1a ch\u1ecdn m\u00e1c v\u00e0 b\u1ec1 d\u00e0y \u1ed1ng theo \u00e1p l\u1ef1c thi\u1ebft k\u1ebf, h\u1ec7 s\u1ed1 an to\u00e0n v\u00e0 \u0111i\u1ec1u ki\u1ec7n ngo\u1ea1i l\u1ef1c.<\/p>\n<h3>2) Gi\u1ea3i ph\u00e1p m\u1ed1i n\u1ed1i<\/h3>\n<p>&#8211; H\u00e0n TIG\/orbital: ch\u1ea5t l\u01b0\u1ee3ng \u1ed5n \u0111\u1ecbnh, ph\u00f9 h\u1ee3p DN v\u1eeba\u2013l\u1edbn; ki\u1ec3m tra th\u1ea9m th\u1ea5u\/si\u00eau \u00e2m t\u1ea1i m\u1ed1i h\u00e0n quan tr\u1ecdng.<br \/>\n&#8211; Press-fit inox (DN15\u2013DN108): thi c\u00f4ng nhanh, \u00edt ch\u00e1y n\u1ed5, v\u00f2ng \u0111\u1ec7m \u0111\u1ea1t ch\u1ee9ng nh\u1eadn n\u01b0\u1edbc u\u1ed1ng; gi\u1ea3m l\u1ed7i th\u1ee7 c\u00f4ng.<br \/>\n&#8211; Grooved\/flange: linh ho\u1ea1t cho l\u1eafp \u0111\u1eb7t, b\u1ea3o tr\u00ec; d\u00f9ng gio\u0103ng EPDM\/FFKM \u0111\u1ea1t ch\u1ee9ng nh\u1eadn.<br \/>\n&#8211; Ng\u0103n \u0103n m\u00f2n \u0111i\u1ec7n h\u00f3a: t\u00e1ch \u0111i\u1ec7n khi n\u1ed1i v\u1edbi \u0111\u1ed3ng\/th\u00e9p carbon; ch\u1ecdn ph\u1ee5 ki\u1ec7n \u0111\u1ed3ng v\u1eadt li\u1ec7u.<\/p>\n<h3>3) X\u1eed l\u00fd b\u1ec1 m\u1eb7t v\u00e0 nghi\u1ec7m thu<\/h3>\n<p>&#8211; Pickling\u2013passivation theo ASTM A380\/A967 sau h\u00e0n\/c\u1eaft \u0111\u1ec3 ph\u1ee5c h\u1ed3i l\u1edbp th\u1ee5 \u0111\u1ed9ng.<br \/>\n&#8211; Th\u1eed \u00e1p l\u1ef1c, ki\u1ec3m tra k\u00edn, soi boroscope m\u1ed1i h\u00e0n; v\u1ec7 sinh\u2013kh\u1eed tr\u00f9ng \u0111\u01b0\u1eddng \u1ed1ng tr\u01b0\u1edbc \u0111\u01b0a v\u00e0o s\u1eed d\u1ee5ng theo AWWA C651.<br \/>\n&#8211; Qu\u1ea3n l\u00fd \u00e1p l\u1ef1c (PM) v\u00e0 chia DMA \u0111\u1ec3 gi\u00e1m s\u00e1t r\u00f2 r\u1ec9 \u2014 inox gi\u00fap m\u1ea1ng \u1ed5n \u0111\u1ecbnh, PM hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p>\n<h2 id=\"toc-4-so-sanh-nhanh-inox-voi-cac-vat-lieu-pho-bien\">So s\u00e1nh nhanh inox v\u1edbi c\u00e1c v\u1eadt li\u1ec7u ph\u1ed5 bi\u1ebfn<\/h2>\n<p>&#8211; Gang c\u1ea7u (DI) l\u00f3t v\u1eefa: B\u1ec1n c\u01a1 h\u1ecdc, nh\u01b0ng d\u1ec5 \u0103n m\u00f2n b\u00ean ngo\u00e0i \u1edf \u0111\u1ea5t \u1ea9m\/x\u00e2m th\u1ef1c; c\u1ea7n s\u01a1n\/bao b\u1ecdc, r\u1ee7i ro r\u00f2 r\u1ec9 t\u1ea1i m\u1ed1i n\u1ed1i v\u00e0 ch\u1ed7 khuy\u1ebft l\u1edbp l\u00f3t.<br \/>\n&#8211; HDPE\/PVC-U: Ch\u1ed1ng \u0103n m\u00f2n, thi c\u00f4ng nhanh; tuy nhi\u00ean nh\u1ea1y v\u1edbi bi\u1ebfn d\u1ea1ng\/\u0111\u00e0o l\u1ea5p, m\u1ed1i h\u00e0n nhi\u1ec7t\/\u0111\u1ea7u n\u1ed1i l\u00e0 \u0111i\u1ec3m y\u1ebfu; bi\u1ebfn thi\u00ean h\u1ec7 s\u1ed1 gi\u00e3n n\u1edf l\u1edbn; c\u1ea7n ki\u1ec3m so\u00e1t th\u1ea5m th\u1ea5u\/clo v\u00e0 \u1ee9ng x\u1eed v\u1edbi b\u00faa n\u01b0\u1edbc.<br \/>\n&#8211; Th\u00e9p m\u1ea1 k\u1ebdm\/\u1ed1ng \u0111en: Nhanh xu\u1ed1ng c\u1ea5p trong n\u01b0\u1edbc clo h\u00f3a; r\u1ee7i ro th\u1ee7ng l\u1ed7\/r\u00f2 r\u1ec9 s\u1edbm; kh\u00f4ng khuy\u1ebfn ngh\u1ecb cho n\u01b0\u1edbc u\u1ed1ng l\u00e2u d\u00e0i.<br \/>\n&#8211; Inox: Kh\u00e1ng \u0103n m\u00f2n, k\u00edn n\u01b0\u1edbc b\u1ec1n, th\u1ee7y l\u1ef1c \u1ed5n \u0111\u1ecbnh, v\u00f2ng \u0111\u1eddi d\u00e0i v\u00e0 t\u00e1i ch\u1ebf d\u1ec5 \u2014 ph\u00f9 h\u1ee3p m\u1ee5c ti\u00eau gi\u1ea3m NRW v\u00e0 b\u1ec1n v\u1eefng.<\/p>\n<h2 id=\"toc-5-loi-ich-dinh-luong-ton-that-ma-sat-va-hoan-von\">L\u1ee3i \u00edch \u0111\u1ecbnh l\u01b0\u1ee3ng: t\u1ed5n th\u1ea5t ma s\u00e1t v\u00e0 ho\u00e0n v\u1ed1n<\/h2>\n<p>&#8211; T\u1ed5n th\u1ea5t ma s\u00e1t: Inox duy tr\u00ec \u0111\u1ed9 nh\u00e1m th\u1ea5p (k \u2248 0,015 mm), h\u1ec7 s\u1ed1 Hazen\u2013Williams C ~ 150; so v\u1edbi \u1ed1ng gang c\u0169 C ~ 100\u2013120. V\u1edbi tuy\u1ebfn DN200 d\u00e0i 10 km, l\u01b0u l\u01b0\u1ee3ng 150 m\u00b3\/h, ti\u1ebft ki\u1ec7m c\u00f4ng su\u1ea5t b\u01a1m c\u00f3 th\u1ec3 \u0111\u1ea1t v\u00e0i kW li\u00ean t\u1ee5c, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng h\u00e0ng ch\u1ee5c MWh\/n\u0103m \u2014 gi\u1ea3m chi ph\u00ed \u0111i\u1ec7n v\u00e0 ph\u00e1t th\u1ea3i.<br \/>\n&#8211; Gi\u1ea3m r\u00f2 r\u1ec9 s\u1ef1 c\u1ed1: Thay m\u1edbi tuy\u1ebfn d\u1ecbch v\u1ee5 sang \u1ed1ng inox g\u00e2n\/EN 10312, c\u1ed9ng v\u1edbi m\u1ed1i n\u1ed1i press-fit\/h\u00e0n ch\u1ea5t l\u01b0\u1ee3ng, th\u01b0\u1eddng c\u1eaft gi\u1ea3m s\u1ed1 \u0111i\u1ec3m v\u1ee1\/n\u0103m \u0111\u00e1ng k\u1ec3; \u1edf quy m\u00f4 \u0111\u00f4 th\u1ecb, \u0111\u00f3ng g\u00f3p h\u1eefu hi\u1ec7u v\u00e0o m\u1ee5c ti\u00eau NRW m\u1ed9t ch\u1eef s\u1ed1.<br \/>\n&#8211; V\u00f2ng \u0111\u1eddi: Chi ph\u00ed \u0111\u1ea7u t\u01b0 cao h\u01a1n c\u00f3 th\u1ec3 ho\u00e0n v\u1ed1n trong 5\u201310 n\u0103m t\u00f9y m\u1ee9c gi\u00e1 n\u01b0\u1edbc, chi ph\u00ed s\u1eeda ch\u1eefa hi\u1ec7n t\u1ea1i v\u00e0 gi\u00e1 \u0111i\u1ec7n \u2014 \u0111\u1eb7c bi\u1ec7t trong khu v\u1ef1c \u0111\u1ea5t x\u00e2m th\u1ef1c, g\u1ea7n bi\u1ec3n ho\u1eb7c m\u1ea1ng l\u01b0\u1edbi \u00e1p l\u1ef1c cao.<\/p>\n<h2 id=\"toc-6-case-study-quoc-te-tieu-bieu\">Case study qu\u1ed1c t\u1ebf ti\u00eau bi\u1ec3u<\/h2>\n<p>&#8211; Tokyo (Nh\u1eadt B\u1ea3n): \u1ee8ng d\u1ee5ng r\u1ed9ng r\u00e3i \u1ed1ng inox g\u00e2n cho tuy\u1ebfn d\u1ecbch v\u1ee5 v\u00e0 c\u00e1c \u0111o\u1ea1n tr\u1ecdng y\u1ebfu gi\u00fap gi\u1ea3m r\u00f2 r\u1ec9 d\u00e0i h\u1ea1n; t\u1ef7 l\u1ec7 r\u00f2 r\u1ec9 \u0111\u01b0\u1ee3c b\u00e1o c\u00e1o gi\u1ea3m xu\u1ed1ng m\u1ee9c r\u1ea5t th\u1ea5p sau nhi\u1ec1u th\u1eadp k\u1ef7 tri\u1ec3n khai \u0111\u1ed3ng b\u1ed9 (tham kh\u1ea3o Nickel Institute\/ISSF).<br \/>\n&#8211; Ch\u00e2u \u00c2u\/B\u1eafc M\u1ef9: AWWA C220 v\u00e0 EN 10312 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho \u1ed1ng truy\u1ec1n t\u1ea3i v\u00e0 ph\u00e2n ph\u1ed1i, nh\u1ea5n m\u1ea1nh \u0111\u1ed9 tin c\u1eady m\u1ed1i n\u1ed1i v\u00e0 an to\u00e0n n\u01b0\u1edbc u\u1ed1ng (NSF\/ANSI\/CAN 61, WRAS).<\/p>\n<h2 id=\"toc-7-checklist-lua-chon-va-dat-mua-inox-cho-du-an-cap-n\">Checklist l\u1ef1a ch\u1ecdn v\u00e0 \u0111\u1eb7t mua inox cho d\u1ef1 \u00e1n c\u1ea5p n\u01b0\u1edbc<\/h2>\n<p>&#8211; H\u1ed3 s\u01a1 n\u01b0\u1edbc: Cl\u2212, pH, clo d\u01b0, nhi\u1ec7t \u0111\u1ed9, \u0111\u1ea5t n\u1ec1n.<br \/>\n&#8211; H\u1ec7 th\u1ed1ng: \u00c1p l\u1ef1c thi\u1ebft k\u1ebf, b\u00faa n\u01b0\u1edbc, \u0111i\u1ec1u ki\u1ec7n l\u00fan\/rung.<br \/>\n&#8211; M\u00e1c v\u00e0 ti\u00eau chu\u1ea9n: 304L\/316L\/2205; ASTM A312\/A778\/A403; AWWA C220; EN 10312.<br \/>\n&#8211; Ch\u1ee9ng nh\u1eadn an to\u00e0n n\u01b0\u1edbc: NSF\/ANSI\/CAN 61 ho\u1eb7c WRAS\/4MS; tu\u00e2n th\u1ee7 QCVN 01-1:2018\/BYT.<br \/>\n&#8211; M\u1ed1i n\u1ed1i v\u00e0 b\u1ec1 m\u1eb7t: H\u00e0n\/orbital ho\u1eb7c press-fit \u0111\u1ea1t chu\u1ea9n; pickling\u2013passivation.<br \/>\n&#8211; Ki\u1ec3m tra &#038; b\u00e0n giao: Th\u1eed \u00e1p, NDT (khi c\u1ea7n), kh\u1eed tr\u00f9ng AWWA C651.<br \/>\n&#8211; B\u1ea3o tr\u00ec: Gi\u00e1m s\u00e1t \u00e1p l\u1ef1c\/DMA, ch\u01b0\u01a1ng tr\u00ecnh r\u00f2 r\u1ec9 ch\u1ee7 \u0111\u1ed9ng; k\u1ebf ho\u1ea1ch thay th\u1ebf \u01b0u ti\u00ean c\u00e1c \u0111o\u1ea1n v\u1eadt li\u1ec7u c\u0169 b\u1eb1ng inox.<\/p>\n<h2 id=\"toc-8-cau-hoi-thuong-gap\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<p>&#8211; Inox c\u00f3 b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi clo d\u01b0? \u1ede nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc sinh ho\u1ea1t, austenitic (304L\/316L) ho\u1ea1t \u0111\u1ed9ng t\u1ed1t v\u1edbi clo d\u01b0 ki\u1ec3m so\u00e1t; tr\u00e1nh \u0111i\u1ec3m \u0111\u1ecdng\/khe h\u1edf v\u00e0 nhi\u1ec7t \u0111\u1ed9 cao \u0111\u1ec3 ph\u00f2ng SCC.<br \/>\n&#8211; C\u00f3 lo ng\u1ea1i v\u1ec1 kim lo\u1ea1i n\u1eb7ng? Inox \u0111\u1ea1t ch\u1ee9ng nh\u1eadn nh\u01b0 NSF\/ANSI\/CAN 61\/WRAS \u0111\u1ea3m b\u1ea3o an to\u00e0n ti\u1ebfp x\u00fac n\u01b0\u1edbc u\u1ed1ng.<br \/>\n&#8211; Inox c\u00f3 ph\u00f9 h\u1ee3p m\u1ecdi tuy\u1ebfn? Kinh t\u1ebf nh\u1ea5t \u1edf \u0111o\u1ea1n r\u1ee7i ro cao (\u0111\u1ea5t x\u00e2m th\u1ef1c, ven bi\u1ec3n), tuy\u1ebfn d\u1ecbch v\u1ee5, tr\u1ea1m b\u01a1m, nh\u00e0 m\u00e1y x\u1eed l\u00fd; c\u00f3 th\u1ec3 k\u1ebft h\u1ee3p v\u1eadt li\u1ec7u kh\u00e1c theo ph\u00e2n \u0111o\u1ea1n r\u1ee7i ro.<\/p>\n<h2 id=\"toc-9-tai-lieu-tham-khao-chon-loc\">T\u00e0i li\u1ec7u tham kh\u1ea3o ch\u1ecdn l\u1ecdc<\/h2>\n<p>&#8211; AWWA C220 \u2013 Stainless-Steel Pipe, 1\/2 in. and Larger, for Water Transmission and Distribution (American Water Works Association).<br \/>\n&#8211; EN 10312 \u2013 Welded stainless steel tubes for the conveyance of aqueous liquids including water for human consumption.<br \/>\n&#8211; Nickel Institute: Stainless Steels in Water; and case studies on municipal water (nickelinstitute.org).<br \/>\n&#8211; International Stainless Steel Forum (ISSF): Stainless steel in potable water applications\/case studies (issf.org).<br \/>\n&#8211; WHO Guidelines for Drinking-water Quality, 4th ed.<br \/>\n&#8211; DVGW W270 (Assessment of materials in contact with drinking water for microbial growth).<br \/>\n&#8211; QCVN 01-1:2018\/BYT \u2013 Quy chu\u1ea9n k\u1ef9 thu\u1eadt qu\u1ed1c gia v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng n\u01b0\u1edbc s\u1ea1ch s\u1eed d\u1ee5ng cho m\u1ee5c \u0111\u00edch sinh ho\u1ea1t.<\/p>\n<h2 id=\"toc-10-ket-luan\">K\u1ebft lu\u1eadn<\/h2>\n<p>\u00c1p d\u1ee5ng inox \u0111\u00fang c\u00e1ch trong h\u1ec7 x\u1eed l\u00fd v\u00e0 c\u1ea5p n\u01b0\u1edbc s\u1ea1ch l\u00e0 gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt hi\u1ec7u qu\u1ea3 \u0111\u1ec3 gi\u1ea3m r\u00f2 r\u1ec9 v\u00e0 th\u1ea5t tho\u00e1t: v\u1eadt li\u1ec7u kh\u00e1ng \u0103n m\u00f2n, m\u1ed1i n\u1ed1i k\u00edn b\u1ec1n, b\u1ec1 m\u1eb7t nh\u1eb5n \u1ed5n \u0111\u1ecbnh th\u1ee7y l\u1ef1c v\u00e0 chi ph\u00ed v\u00f2ng \u0111\u1eddi th\u1ea5p. L\u1ef1a ch\u1ecdn m\u00e1c ph\u00f9 h\u1ee3p (304L\/316L\/2205), tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n (AWWA C220, ASTM\/EN), x\u1eed l\u00fd b\u1ec1 m\u1eb7t v\u00e0 thi c\u00f4ng chu\u1ea9n l\u00e0 c\u00e1c y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh. Khi k\u1ebft h\u1ee3p v\u1edbi qu\u1ea3n l\u00fd \u00e1p l\u1ef1c v\u00e0 DMA, inox gi\u00fap \u0111\u01b0a NRW v\u1ec1 m\u1ee9c m\u1ee5c ti\u00eau m\u1ed9t c\u00e1ch b\u1ec1n v\u1eefng, \u0111\u1ed3ng th\u1eddi \u0111\u00f3ng g\u00f3p v\u00e0o m\u1ee5c ti\u00eau c\u00f4ng tr\u00ecnh xanh v\u00e0 kinh t\u1ebf tu\u1ea7n ho\u00e0n.<\/p>\n<p>C\u1ea7n t\u01b0 v\u1ea5n ch\u1ecdn m\u00e1c, ti\u00eau chu\u1ea9n, c\u1ea5u h\u00ecnh m\u1ed1i n\u1ed1i v\u00e0 b\u00e1o gi\u00e1 t\u1ed1t nh\u1ea5t cho d\u1ef1 \u00e1n 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<\/p>\n","protected":false},"excerpt":{"rendered":"<p>H\u01b0\u1edbng d\u1eabn ch\u1ecdn m\u00e1c, ti\u00eau chu\u1ea9n v\u00e0 thi c\u00f4ng inox cho h\u1ec7 x\u1eed l\u00fd-c\u1ea5p n\u01b0\u1edbc, ch\u1ed1ng \u0103n m\u00f2n, gi\u1ea3m r\u00f2 r\u1ec9 v\u00e0 chi ph\u00ed v\u00f2ng \u0111\u1eddi. C\u00f3 case study v\u00e0 ti\u00eau chu\u1ea9n.<\/p>\n","protected":false},"author":7,"featured_media":1011,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-1981","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\/1981","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=1981"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/1981\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1011"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=1981"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=1981"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=1981"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}