{"id":2110,"date":"2026-06-07T00:33:52","date_gmt":"2026-06-06T17:33:52","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/han-noi-ren-hay-noi-bich-cho-ong-inox-uu-nhuoc-diem-cach-chon\/"},"modified":"2026-06-07T00:33:52","modified_gmt":"2026-06-06T17:33:52","slug":"han-noi-ren-hay-noi-bich-cho-ong-inox-uu-nhuoc-diem-cach-chon","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/han-noi-ren-hay-noi-bich-cho-ong-inox-uu-nhuoc-diem-cach-chon\/","title":{"rendered":"H\u00e0n, n\u1ed1i ren hay n\u1ed1i b\u00edch cho \u1ed1ng Inox? \u01afu nh\u01b0\u1ee3c \u0111i\u1ec3m &#038; c\u00e1ch ch\u1ecdn"},"content":{"rendered":"<div class=\"custom-toc\">\n<h3>N\u1ed9i dung ch\u00ednh<\/h3>\n<ul>\n<li><a href=\"#toc-0-tong-quan-vat-tu-tieu-chuan-va-pham-vi-ap-dung\">T\u1ed5ng quan v\u1eadt t\u01b0, ti\u00eau chu\u1ea9n v\u00e0 ph\u1ea1m vi \u00e1p d\u1ee5ng<\/a><\/li>\n<li><a href=\"#toc-1-noi-han-ong-inox\">N\u1ed1i h\u00e0n \u1ed1ng Inox<\/a><\/li>\n<li><a href=\"#toc-2-noi-ren-bsptnpt\">N\u1ed1i ren (BSPT\/NPT)<\/a><\/li>\n<li><a href=\"#toc-3-noi-bich-flange\">N\u1ed1i b\u00edch (Flange)<\/a><\/li>\n<li><a href=\"#toc-4-so-sanh-nhanh-chon-phuong-phap-theo-tieu-chi-ky-th\">So s\u00e1nh nhanh: ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p theo ti\u00eau ch\u00ed k\u1ef9 thu\u1eadt<\/a><\/li>\n<li><a href=\"#toc-5-goi-y-lua-chon-theo-ung-dung-thuc-te\">G\u1ee3i \u00fd l\u1ef1a ch\u1ecdn theo \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf<\/a><\/li>\n<li><a href=\"#toc-6-loi-thuong-gap-va-cach-tranh\">L\u1ed7i th\u01b0\u1eddng g\u1eb7p v\u00e0 c\u00e1ch tr\u00e1nh<\/a><\/li>\n<li><a href=\"#toc-7-quy-trinh-kiem-soat-chat-luong-va-thu-nghiem\">Quy tr\u00ecnh ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 th\u1eed nghi\u1ec7m<\/a><\/li>\n<li><a href=\"#toc-8-cau-hoi-nhanh\">C\u00e2u h\u1ecfi nhanh<\/a><\/li>\n<li><a href=\"#toc-9-nguon-tham-khao\">Ngu\u1ed3n tham kh\u1ea3o<\/a><\/li>\n<li><a href=\"#toc-10-ket-luan\">K\u1ebft lu\u1eadn<\/a><\/li>\n<\/ul>\n<\/div>\n<p>\u1ed0ng Inox \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong n\u01b0\u1edbc s\u1ea1ch, HVAC, th\u1ef1c ph\u1ea9m, h\u00f3a ch\u1ea5t, h\u01a1i v\u00e0 c\u00f4ng nghi\u1ec7p n\u1eb7ng. C\u00e2u h\u1ecfi th\u1ef1c ti\u1ec5n nh\u1ea5t khi l\u1eafp \u0111\u1eb7t l\u00e0: ch\u1ecdn n\u1ed1i h\u00e0n, n\u1ed1i ren hay n\u1ed1i b\u00edch \u0111\u1ec3 \u0111\u1ea1t \u0111\u1ed9 k\u00edn, an to\u00e0n, v\u1ec7 sinh v\u00e0 t\u1ed1i \u01b0u chi ph\u00ed? B\u00e0i vi\u1ebft n\u00e0y ph\u00e2n t\u00edch chi ti\u1ebft ba ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn, ti\u00eau chu\u1ea9n \u00e1p d\u1ee5ng, quy tr\u00ecnh thi c\u00f4ng, ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng, v\u00e0 \u0111\u01b0a ra h\u01b0\u1edbng d\u1eabn ch\u1ecdn nhanh theo t\u1eebng b\u00e0i to\u00e1n. \u0110\u00e2y l\u00e0 m\u1ed9t th\u00e0nh t\u1ed1 quan tr\u1ecdng trong c\u1ea9m nang \u1ed1ng\/h\u1ed9p Inox, nh\u01b0ng n\u1ed9i dung d\u01b0\u1edbi \u0111\u00e2y ho\u00e0n to\u00e0n \u0111\u1ed9c l\u1eadp v\u00e0 c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng ngay t\u1ea1i c\u00f4ng tr\u01b0\u1eddng\/x\u01b0\u1edfng.<\/p>\n<h2 id=\"toc-0-tong-quan-vat-tu-tieu-chuan-va-pham-vi-ap-dung\">T\u1ed5ng quan v\u1eadt t\u01b0, ti\u00eau chu\u1ea9n v\u00e0 ph\u1ea1m vi \u00e1p d\u1ee5ng<\/h2>\n<p>&#8211; Ch\u1ee7ng lo\u1ea1i \u1ed1ng Inox th\u01b0\u1eddng g\u1eb7p:<br \/>\n  &#8211; \u1ed0ng c\u00f4ng nghi\u1ec7p h\u00e0n\/\u0111\u00fac: ASTM A312 (304\/304L, 316\/316L), Schedule 10\/40\/80.<br \/>\n  &#8211; \u1ed0ng c\u01a1 kh\u00ed trang tr\u00ed: ASTM A554 (201\/304\/316) \u2013 \u01b0u ti\u00ean k\u1ebft c\u1ea5u nh\u1eb9, kh\u00f4ng khuy\u1ebfn ngh\u1ecb cho m\u00f4i ch\u1ea5t, \u00e1p l\u1ef1c cao.<br \/>\n&#8211; Ph\u1ee5 ki\u1ec7n:<br \/>\n  &#8211; H\u00e0n: c\u00fat, t\u00ea, b\u00edch h\u00e0n theo ASME B16.9\/B16.5; EN 10253\/EN 1092-1; JIS.<br \/>\n  &#8211; Ren: ph\u1ee5 ki\u1ec7n ren ISO 7-1 (BSPT\/Rp) ph\u1ed5 bi\u1ebfn t\u1ea1i VN; ho\u1eb7c ASME B1.20.1 (NPT).<br \/>\n  &#8211; B\u00edch: ASME B16.5 (Class 150\/300&#8230;), EN 1092-1 (PN10\/16\/25&#8230;), JIS B2220 (5K\/10K\/16K).<br \/>\n&#8211; Quy ph\u1ea1m thi\u1ebft k\u1ebf thi c\u00f4ng th\u01b0\u1eddng tham chi\u1ebfu: ASME B31.3 (h\u00f3a ch\u1ea5t), B31.1 (h\u01a1i \u2013 \u0111i\u1ec7n), TCVN\/EN t\u01b0\u01a1ng \u1ee9ng cho n\u01b0\u1edbc, PCCC.<\/p>\n<h2 id=\"toc-1-noi-han-ong-inox\">N\u1ed1i h\u00e0n \u1ed1ng Inox<\/h2>\n<h3>Khi n\u00e0o ch\u1ecdn h\u00e0n<\/h3>\n<p>&#8211; Y\u00eau c\u1ea7u \u0111\u1ed9 k\u00edn cao, \u00e1p l\u1ef1c\/tr\u1ecb s\u1ed1 ch\u00e2n kh\u00f4ng \u0111\u00e1ng k\u1ec3.<br \/>\n&#8211; H\u1ec7 th\u1ed1ng v\u1ec7 sinh cao (th\u1ef1c ph\u1ea9m, d\u01b0\u1ee3c, vi sinh) \u2013 \u01b0u ti\u00ean h\u00e0n orbit kh\u00f4ng b\u00f9 que, m\u1ed1i h\u00e0n ph\u1eb3ng trong.<br \/>\n&#8211; Kh\u00f4ng c\u1ea7n th\u00e1o l\u1eafp th\u01b0\u1eddng xuy\u00ean.<br \/>\n&#8211; Nhi\u1ec7t \u0111\u1ed9\/\u0103n m\u00f2n cao (h\u00f3a ch\u1ea5t, h\u01a1i), gi\u1ea3m nguy c\u01a1 r\u00f2 t\u1ea1i m\u1ed1i n\u1ed1i.<\/p>\n<h3>C\u00f4ng ngh\u1ec7 h\u00e0n v\u00e0 v\u1eadt li\u1ec7u b\u00f9<\/h3>\n<p>&#8211; GTAW\/TIG: chu\u1ea9n cho Inox; cho ch\u1ea5t l\u01b0\u1ee3ng cao, ki\u1ec3m so\u00e1t h\u1ed3 quang t\u1ed1t. Sanitary d\u00f9ng h\u00e0n orbit t\u1ef1 \u0111\u1ed9ng.<br \/>\n&#8211; GMAW\/MIG: hi\u1ec7u su\u1ea5t cao cho \u1ed1ng d\u00e0y, k\u1ebft c\u1ea5u ngo\u00e0i.<br \/>\n&#8211; SMAW (que): d\u00f9ng cho s\u1eeda ch\u1eefa\/ngo\u00e0i c\u00f4ng tr\u01b0\u1eddng.<br \/>\n&#8211; Que\/d\u00e2y h\u00e0n th\u01b0\u1eddng d\u00f9ng:<br \/>\n  &#8211; 304\/304L: ER308L\/E308L.<br \/>\n  &#8211; 316\/316L: ER316L\/E316L.<br \/>\n&#8211; Khuy\u1ebfn ngh\u1ecb d\u00f9ng m\u00e1c \u201cL\u201d (h\u00e0m l\u01b0\u1ee3ng C th\u1ea5p) \u0111\u1ec3 h\u1ea1n ch\u1ebf \u0103n m\u00f2n li\u00ean tinh v\u00f9ng \u1ea3nh h\u01b0\u1edfng nhi\u1ec7t (HAZ).<\/p>\n<h3>Y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt quan tr\u1ecdng<\/h3>\n<p>&#8211; B\u1ea3o v\u1ec7 m\u1eb7t trong b\u1eb1ng kh\u00ed tr\u01a1 (back purging) v\u1edbi Argon \u0111\u1ec3 tr\u00e1nh x\u1ec9 \u00f4xit\/\u0111\u01b0\u1eddng \u201c\u0111\u01b0\u1eddng m\u00eda\u201d trong \u1ed1ng \u2013 b\u1eaft bu\u1ed9c cho m\u00f4i tr\u01b0\u1eddng v\u1ec7 sinh\/\u0103n m\u00f2n.<br \/>\n&#8211; Ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ea7u v\u00e0o \u0111\u1ec3 h\u1ea1n ch\u1ebf \u0111\u1ed5i m\u00e0u (heat tint). Sau h\u00e0n, t\u1ea9y g\u1ec9 \u2013 th\u1ee5 \u0111\u1ed9ng h\u00f3a theo ASTM A380\/A967 \u0111\u1ec3 t\u00e1i t\u1ea1o l\u1edbp th\u1ee5 \u0111\u1ed9ng Cr2O3.<br \/>\n&#8211; Quy tr\u00ecnh\/WPS-PQR v\u00e0 th\u1ee3 h\u00e0n ph\u1ea3i \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn (ASME IX\/ISO 9606-1) cho \u1ee9ng d\u1ee5ng \u00e1p l\u1ef1c.<\/p>\n<h3>Quy tr\u00ecnh thi c\u00f4ng t\u00f3m t\u1eaft<\/h3>\n<p>1) Gia c\u00f4ng v\u00e1t m\u00e9p \u0111\u00fang chu\u1ea9n (V, U) v\u00e0 l\u00e0m s\u1ea1ch d\u1ea7u m\u1ee1.<br \/>\n2) C\u0103n ch\u1ec9nh, \u0111i\u1ec3m gi\u1eef (tack weld) \u0111\u1ec1u chu vi.<br \/>\n3) Thi\u1ebft l\u1eadp kh\u00ed l\u00f3t trong \u1ed1ng (purge) \u0111\u1ea1t O2 d\u01b0 < 0,1% cho h\u00e0n v\u1ec7 sinh.  \n4) H\u00e0n li\u00ean t\u1ee5c theo quy tr\u00ecnh, tr\u00e1nh dao \u0111\u1ed9ng qu\u00e1 l\u1edbn.  \n5) L\u00e0m s\u1ea1ch m\u1ed1i h\u00e0n, t\u1ea9y g\u1ec9 \u2013 th\u1ee5 \u0111\u1ed9ng h\u00f3a.  \n6) Ki\u1ec3m tra: VT, PT; v\u1edbi \u0111\u01b0\u1eddng \u1ed1ng \u00e1p l\u1ef1c\/quan tr\u1ecdng c\u00f3 th\u1ec3 RT\/UT; th\u1ee7y l\u1ef1c\/kh\u00ed n\u00e9n theo m\u00e3.\n\n\n\n<h3>\u01afu\/nh\u01b0\u1ee3c \u0111i\u1ec3m<\/h3>\n<p>&#8211; \u01afu \u0111i\u1ec3m:<br \/>\n  &#8211; \u0110\u1ed9 k\u00edn cao nh\u1ea5t, ch\u1ecbu \u00e1p\/nhi\u1ec7t\/vibrations t\u1ed1t.<br \/>\n  &#8211; V\u1ec7 sinh t\u1ed1t (\u0111\u1eb7c bi\u1ec7t h\u00e0n orbit), gi\u1ea3m \u0111i\u1ec3m ch\u1ebft\/ke b\u1ea9n.<br \/>\n  &#8211; G\u1ecdn nh\u1eb9, kh\u00f4ng c\u1ea7n kh\u00f4ng gian cho b\u00edch\/ren.<br \/>\n&#8211; Nh\u01b0\u1ee3c \u0111i\u1ec3m:<br \/>\n  &#8211; Y\u00eau c\u1ea7u th\u1ee3 tay ngh\u1ec1, thi\u1ebft b\u1ecb, ki\u1ec3m so\u00e1t kh\u00ed l\u00f3t.<br \/>\n  &#8211; Kh\u00f3 th\u00e1o l\u1eafp; s\u1eeda \u0111\u1ed5i t\u1ed1n c\u00f4ng.<br \/>\n  &#8211; R\u1ee7i ro bi\u1ebfn m\u00e0u\/\u0103n m\u00f2n n\u1ebfu kh\u00f4ng t\u1ea9y \u2013 th\u1ee5 \u0111\u1ed9ng h\u00f3a sau h\u00e0n.<\/p>\n<h2 id=\"toc-2-noi-ren-bsptnpt\">N\u1ed1i ren (BSPT\/NPT)<\/h2>\n<h3>Khi n\u00e0o ch\u1ecdn ren<\/h3>\n<p>&#8211; \u0110\u01b0\u1eddng k\u00ednh nh\u1ecf (khuy\u1ebfn ngh\u1ecb \u2264 DN50\/2&#8243;).<br \/>\n&#8211; \u00c1p l\u1ef1c trung b\u00ecnh \u2013 th\u1ea5p, h\u1ec7 th\u1ed1ng ph\u1ee5 tr\u1ee3: kh\u00ed n\u00e9n, n\u01b0\u1edbc s\u1ea1ch c\u00f4ng nghi\u1ec7p, h\u1ec7 th\u1ed1ng t\u1ea1m.<br \/>\n&#8211; C\u1ea7n linh ho\u1ea1t, thi c\u00f4ng nhanh, kh\u00f4ng mang t\u00ednh v\u1ec7 sinh tuy\u1ec7t \u0111\u1ed1i.<\/p>\n<h3>Ti\u00eau chu\u1ea9n v\u00e0 v\u1eadt t\u01b0<\/h3>\n<p>&#8211; ISO 7-1 (BSPT\/Rp) v\u00e0 ISO 228-1 (ren \u1ed1ng tr\u1ee5 G) ph\u1ed5 bi\u1ebfn t\u1ea1i VN\/Ch\u00e2u \u00c2u.<br \/>\n&#8211; ASME B1.20.1 (NPT) ph\u1ed5 bi\u1ebfn theo ti\u00eau chu\u1ea9n M\u1ef9.<br \/>\n&#8211; Ph\u1ee5 ki\u1ec7n Inox \u0111\u00fac 304\/316; tr\u00e1nh l\u1eabn l\u1ed9n chu\u1ea9n ren.<br \/>\n&#8211; V\u1eadt li\u1ec7u l\u00e0m k\u00edn: b\u0103ng PTFE, keo k\u1ef5 kh\u00ed (anaerobic). L\u01b0u \u00fd ch\u1ed1ng \u201cgalling\u201d (k\u1eb9t ren) v\u1edbi Inox: d\u00f9ng m\u1ee1 ch\u1ed1ng k\u1eb9t ch\u1ee9a MoS2\/graphite, si\u1ebft v\u1eeba l\u1ef1c.<\/p>\n<h3>Gi\u1edbi h\u1ea1n k\u1ef9 thu\u1eadt v\u00e0 l\u01b0u \u00fd<\/h3>\n<p>&#8211; K\u00edch th\u01b0\u1edbc: th\u1ef1c h\u00e0nh t\u1ed1t gi\u1edbi h\u1ea1n \u0111\u1ebfn DN50; l\u1edbn h\u01a1n d\u1ec5 r\u00f2, kh\u00f3 si\u1ebft \u0111\u1ec1u.<br \/>\n&#8211; \u00c1p l\u1ef1c: t\u00f9y ph\u1ee5 ki\u1ec7n, th\u01b0\u1eddng \u0111\u1ebfn ~20\u201325 bar \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng; gi\u1ea3m theo nhi\u1ec7t \u0111\u1ed9. Ki\u1ec3m tra catalog nh\u00e0 s\u1ea3n xu\u1ea5t.<br \/>\n&#8211; Kh\u00f4ng khuy\u1ebfn ngh\u1ecb cho m\u00f4i tr\u01b0\u1eddng rung \u0111\u1ed9ng m\u1ea1nh, chu k\u1ef3 nhi\u1ec7t l\u1edbn, v\u1ec7 sinh CIP\/SIP.<br \/>\n&#8211; Tr\u00e1nh k\u1eb9p c\u1ee9ng qu\u00e1 m\u1ee9c; si\u1ebft theo s\u1ed1 v\u00f2ng khuy\u1ebfn c\u00e1o, th\u1eed k\u00edn sau l\u1eafp.<\/p>\n<h3>Quy tr\u00ecnh l\u1eafp \u0111\u1eb7t t\u00f3m t\u1eaft<\/h3>\n<p>1) L\u00e0m s\u1ea1ch ren trong\/ngo\u00e0i, ki\u1ec3m tra chu\u1ea9n ren t\u01b0\u01a1ng th\u00edch.<br \/>\n2) Qu\u1ea5n PTFE theo chi\u1ec1u si\u1ebft; ho\u1eb7c b\u00f4i keo k\u1ef5 kh\u00ed.<br \/>\n3) Si\u1ebft tay \u0111\u1ebfn ch\u1eb7t, sau \u0111\u00f3 d\u00f9ng kh\u00f3a si\u1ebft th\u00eam 1\u20132 v\u00f2ng t\u00f9y chu\u1ea9n.<br \/>\n4) \u0110\u1ecbnh h\u01b0\u1edbng ph\u1ee5 ki\u1ec7n \u0111\u00fang v\u1ecb tr\u00ed tr\u01b0\u1edbc khi \u0111\u1ea1t l\u1ef1c cu\u1ed1i.<br \/>\n5) Th\u1eed \u00e1p\/leak test; \u0111\u00e1nh d\u1ea5u ki\u1ec3m so\u00e1t.<\/p>\n<h3>\u01afu\/nh\u01b0\u1ee3c \u0111i\u1ec3m<\/h3>\n<p>&#8211; \u01afu \u0111i\u1ec3m:<br \/>\n  &#8211; Nhanh, kh\u00f4ng c\u1ea7n h\u00e0n\/kh\u00ed b\u1ea3o v\u1ec7.<br \/>\n  &#8211; D\u1ec5 th\u00e1o l\u1eafp, s\u1eeda ch\u1eefa.<br \/>\n  &#8211; Chi ph\u00ed ban \u0111\u1ea7u th\u1ea5p cho DN nh\u1ecf.<br \/>\n&#8211; Nh\u01b0\u1ee3c \u0111i\u1ec3m:<br \/>\n  &#8211; Nguy c\u01a1 r\u00f2 t\u1ea1i ren; k\u00e9m v\u1ec7 sinh (khe h\u1edf).<br \/>\n  &#8211; D\u1ec5 galling; gi\u1edbi h\u1ea1n k\u00edch th\u01b0\u1edbc\/\u00e1p l\u1ef1c.<br \/>\n  &#8211; Kh\u00f3 \u0111\u1ed3ng b\u1ed9 khi d\u00f9ng l\u1eabn BSPT\/NPT.<\/p>\n<h2 id=\"toc-3-noi-bich-flange\">N\u1ed1i b\u00edch (Flange)<\/h2>\n<h3>Khi n\u00e0o ch\u1ecdn b\u00edch<\/h3>\n<p>&#8211; C\u1ea7n th\u00e1o l\u1eafp \u0111\u1ecbnh k\u1ef3 (b\u01a1m, van, thi\u1ebft b\u1ecb \u0111o).<br \/>\n&#8211; \u0110\u01b0\u1eddng k\u00ednh trung b\u00ecnh \u2013 l\u1edbn (\u2265 DN50).<br \/>\n&#8211; \u00c1p l\u1ef1c cao h\u01a1n, c\u1ea7n ti\u00eau chu\u1ea9n h\u00f3a, ki\u1ec3m so\u00e1t l\u1ef1c bul\u00f4ng \u2013 \u0111\u1ed9 k\u00edn.<\/p>\n<h3>Ti\u00eau chu\u1ea9n, ch\u1ee7ng lo\u1ea1i b\u00edch v\u00e0 gio\u0103ng<\/h3>\n<p>&#8211; Ti\u00eau chu\u1ea9n th\u00f4ng d\u1ee5ng t\u1ea1i VN:<br \/>\n  &#8211; ASME B16.5: Class 150\/300\/600\u2026<br \/>\n  &#8211; EN 1092-1: PN10\/16\/25\u2026<br \/>\n  &#8211; JIS B2220: 5K\/10K\/16K (10K r\u1ea5t ph\u1ed5 bi\u1ebfn c\u1ea5p n\u01b0\u1edbc).<br \/>\n&#8211; Ki\u1ec3u b\u00edch: Weld Neck (WN), Slip-On (SO), Socket Weld (SW), Lap Joint (LJ).<br \/>\n&#8211; M\u1eb7t b\u00edch: Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ \u2013 \u00e1p\/nhi\u1ec7t cao).<br \/>\n&#8211; Gio\u0103ng:<br \/>\n  &#8211; Spiral wound SS316 + graphite (h\u01a1i\/nhi\u1ec7t cao) ho\u1eb7c + PTFE (h\u00f3a ch\u1ea5t).<br \/>\n  &#8211; CNAF\/EPDM\/PTFE cho n\u01b0\u1edbc\/h\u00f3a ch\u1ea5t nh\u1eb9; RTJ cho \u00e1p cao.<br \/>\n&#8211; Bul\u00f4ng\/\u0111ai \u1ed1c: ASTM A193 B8\/B8M (Inox), \u0111ai \u1ed1c ASTM A194 8\/8M; b\u00f4i tr\u01a1n ren \u2013 m\u1eb7t \u0111\u1ec7m \u0111\u1ec3 ki\u1ec3m so\u00e1t m\u00f4-men.<\/p>\n<h3>Y\u00eau c\u1ea7u b\u1ec1 m\u1eb7t v\u00e0 si\u1ebft l\u1ef1c<\/h3>\n<p>&#8211; \u0110\u1ed9 nh\u00e1m m\u1eb7t b\u00edch RF \u0111i\u1ec3n h\u00ecnh Ra 3,2\u20136,3 \u00b5m \u0111\u1ec3 \u201c\u0103n\u201d gio\u0103ng.<br \/>\n&#8211; C\u0103n \u0111\u1ed3ng tr\u1ee5c, khe h\u1edf \u0111\u1ec1u; kh\u00f4ng \u00e9p l\u1ec7ch.<br \/>\n&#8211; Si\u1ebft ch\u00e9o h\u00ecnh sao, l\u00ean l\u1ef1c theo 3\u20134 b\u01b0\u1edbc \u0111\u1ebfn m\u00f4-men khuy\u1ebfn c\u00e1o nh\u00e0 s\u1ea3n xu\u1ea5t gio\u0103ng\/bul\u00f4ng.<br \/>\n&#8211; Sau 24 gi\u1edd, retorque n\u1ebfu y\u00eau c\u1ea7u d\u1ecbch v\u1ee5 rung \u0111\u1ed9ng\/nhi\u1ec7t.<\/p>\n<h3>Quy tr\u00ecnh l\u1eafp \u0111\u1eb7t t\u00f3m t\u1eaft<\/h3>\n<p>1) Ki\u1ec3m tra chu\u1ea9n b\u00edch \u0111\u1ed3ng b\u1ed9 (ASME\/EN\/JIS, \u00e1p su\u1ea5t danh \u0111\u1ecbnh).<br \/>\n2) L\u00e0m s\u1ea1ch b\u1ec1 m\u1eb7t, \u0111\u1eb7t gio\u0103ng \u0111\u00fang t\u00e2m.<br \/>\n3) L\u1eafp bul\u00f4ng, si\u1ebft \u0111\u1ed1i x\u1ee9ng nhi\u1ec1u b\u01b0\u1edbc.<br \/>\n4) Th\u1eed k\u00edn th\u1ee7y l\u1ef1c\/kh\u00ed theo thi\u1ebft k\u1ebf.<br \/>\n5) \u0110\u00e1nh d\u1ea5u \u2013 l\u1eadp bi\u00ean b\u1ea3n l\u1ef1c si\u1ebft.<\/p>\n<h3>\u01afu\/nh\u01b0\u1ee3c \u0111i\u1ec3m<\/h3>\n<p>&#8211; \u01afu \u0111i\u1ec3m:<br \/>\n  &#8211; Th\u00e1o l\u1eafp, b\u1ea3o tr\u00ec thu\u1eadn ti\u1ec7n.<br \/>\n  &#8211; Chu\u1ea9n h\u00f3a, \u00e1p d\u1ee5ng \u0111\u01b0\u1ee3c \u00e1p l\u1ef1c\/nhi\u1ec7t \u0111\u1ed9 r\u1ed9ng.<br \/>\n  &#8211; D\u1ec5 l\u1eafp thi\u1ebft b\u1ecb, \u0111o l\u01b0\u1eddng, van.<br \/>\n&#8211; Nh\u01b0\u1ee3c \u0111i\u1ec3m:<br \/>\n  &#8211; C\u1ed3ng k\u1ec1nh, n\u1eb7ng; chi\u1ebfm kh\u00f4ng gian.<br \/>\n  &#8211; Chi ph\u00ed v\u1eadt t\u01b0\/gio\u0103ng\/bul\u00f4ng v\u00e0 nh\u00e2n c\u00f4ng cao h\u01a1n ren.<br \/>\n  &#8211; R\u00f2 r\u1ec9 n\u1ebfu c\u0103n ch\u1ec9nh\/si\u1ebft l\u1ef1c sai ho\u1eb7c ch\u1ecdn sai gio\u0103ng.<\/p>\n<h2 id=\"toc-4-so-sanh-nhanh-chon-phuong-phap-theo-tieu-chi-ky-th\">So s\u00e1nh nhanh: ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p theo ti\u00eau ch\u00ed k\u1ef9 thu\u1eadt<\/h2>\n<p>&#8211; \u0110\u1ed9 k\u00edn v\u00e0 \u00e1p l\u1ef1c:<br \/>\n  &#8211; H\u00e0n: cao nh\u1ea5t, ph\u00f9 h\u1ee3p \u00e1p l\u1ef1c\/nhi\u1ec7t \u0111\u1ed9 cao.<br \/>\n  &#8211; B\u00edch: cao, ph\u1ee5 thu\u1ed9c gio\u0103ng \u2013 l\u1edbp \u00e1p.<br \/>\n  &#8211; Ren: trung b\u00ecnh, t\u1ed1t nh\u1ea5t \u1edf DN nh\u1ecf \u2013 \u00e1p v\u1eeba.<br \/>\n&#8211; V\u1ec7 sinh\/CIP-SIP:<br \/>\n  &#8211; H\u00e0n orbit\/\u0111\u00fang quy tr\u00ecnh: t\u1ed1t nh\u1ea5t.<br \/>\n  &#8211; B\u00edch: trung b\u00ecnh; c\u00f3 khe gio\u0103ng.<br \/>\n  &#8211; Ren: k\u00e9m cho v\u1ec7 sinh cao.<br \/>\n&#8211; Th\u00e1o l\u1eafp \u2013 b\u1ea3o tr\u00ec:<br \/>\n  &#8211; B\u00edch: t\u1ed1t nh\u1ea5t.<br \/>\n  &#8211; Ren: t\u1ed1t cho DN nh\u1ecf.<br \/>\n  &#8211; H\u00e0n: kh\u00f3 nh\u1ea5t.<br \/>\n&#8211; T\u1ed1c \u0111\u1ed9 v\u00e0 chi ph\u00ed ban \u0111\u1ea7u:<br \/>\n  &#8211; Ren: th\u1ea5p nh\u1ea5t \u2013 nhanh.<br \/>\n  &#8211; H\u00e0n: trung b\u00ecnh \u0111\u1ebfn cao (t\u00f9y y\u00eau c\u1ea7u ch\u1ea5t l\u01b0\u1ee3ng).<br \/>\n  &#8211; B\u00edch: cao h\u01a1n do nhi\u1ec1u chi ti\u1ebft.<br \/>\n&#8211; Y\u00eau c\u1ea7u tay ngh\u1ec1\/thi\u1ebft b\u1ecb:<br \/>\n  &#8211; H\u00e0n: cao.<br \/>\n  &#8211; B\u00edch: trung b\u00ecnh (ki\u1ebfn th\u1ee9c torque\/gasket).<br \/>\n  &#8211; Ren: th\u1ea5p \u2013 trung b\u00ecnh.<\/p>\n<h2 id=\"toc-5-goi-y-lua-chon-theo-ung-dung-thuc-te\">G\u1ee3i \u00fd l\u1ef1a ch\u1ecdn theo \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf<\/h2>\n<p>&#8211; N\u01b0\u1edbc s\u1ea1ch, HVAC, PCCC:<br \/>\n  &#8211; DN \u2264 2&#8243;: \u01b0u ti\u00ean ren (nh\u00e1nh, ph\u1ee5 tr\u1ee3), h\u00e0n cho tuy\u1ebfn ch\u00ednh.<br \/>\n  &#8211; DN > 2&#8243;: tuy\u1ebfn ch\u00ednh h\u00e0n; l\u1eafp \u2013 th\u00e1o t\u1ea1i van\/b\u01a1m b\u1eb1ng b\u00edch JIS 10K\/EN PN16\/ASME 150.<br \/>\n&#8211; Th\u1ef1c ph\u1ea9m \u2013 \u0111\u1ed3 u\u1ed1ng \u2013 d\u01b0\u1ee3c (CIP\/SIP):<br \/>\n  &#8211; H\u00e0n orbit TIG (kh\u00f4ng b\u00f9 que), \u0111\u00e1nh b\u00f3ng trong, t\u1ea9y \u2013 th\u1ee5 \u0111\u1ed9ng h\u00f3a.<br \/>\n  &#8211; \u0110i\u1ec3m th\u00e1o l\u1eafp nhanh c\u00f3 th\u1ec3 d\u00f9ng clamp sanitary (tri-clamp) \u2013 ngo\u00e0i ph\u1ea1m vi ba ph\u01b0\u01a1ng ph\u00e1p ch\u00ednh nh\u01b0ng l\u00e0 chu\u1ea9n v\u1ec7 sinh.<br \/>\n&#8211; H\u00f3a ch\u1ea5t \u0103n m\u00f2n\/bi\u1ec3n:<br \/>\n  &#8211; \u01afu ti\u00ean 316\/316L; h\u00e0n + b\u00edch v\u1edbi gio\u0103ng PTFE\/graphite; tr\u00e1nh ren n\u1ebfu c\u00f3 th\u1ec3.<br \/>\n&#8211; H\u01a1i b\u00e3o h\u00f2a\/condensate:<br \/>\n  &#8211; H\u00e0n cho \u0111\u01b0\u1eddng \u1ed1ng ch\u00ednh; b\u00edch t\u1ea1i van\/thi\u1ebft b\u1ecb; gio\u0103ng graphite, b\u00edch ASME 150\/300 t\u00f9y \u00e1p.<br \/>\n&#8211; Kh\u00ed n\u00e9n:<br \/>\n  &#8211; DN nh\u1ecf: ren; DN l\u1edbn\/\u00e1p cao: b\u00edch\/h\u00e0n.<br \/>\n&#8211; H\u1ec7 th\u1ed1ng ch\u00e2n kh\u00f4ng:<br \/>\n  &#8211; H\u00e0n l\u00e0 l\u1ef1a ch\u1ecdn \u0111\u1ea7u tay; b\u00edch RTJ\/CF (\u0111\u1eb7c th\u00f9) n\u1ebfu c\u1ea7n th\u00e1o l\u1eafp.<\/p>\n<h2 id=\"toc-6-loi-thuong-gap-va-cach-tranh\">L\u1ed7i th\u01b0\u1eddng g\u1eb7p v\u00e0 c\u00e1ch tr\u00e1nh<\/h2>\n<p>&#8211; H\u00e0n:<br \/>\n  &#8211; Kh\u00f4ng d\u00f9ng kh\u00ed l\u00f3t \u2192 x\u1ec9 \u00f4xit, \u0103n m\u00f2n k\u1ebd.<br \/>\n  &#8211; Kh\u00f4ng t\u1ea9y \u2013 th\u1ee5 \u0111\u1ed9ng h\u00f3a \u2192 m\u1ed1i h\u00e0n \u0111\u1ed5i m\u00e0u, gi\u1ea3m ch\u1ed1ng \u0103n m\u00f2n.<br \/>\n  &#8211; Pha tr\u1ed9n 201 cho \u0111\u01b0\u1eddng \u1ed1ng m\u00f4i ch\u1ea5t \u2192 nhanh xu\u1ed1ng c\u1ea5p trong n\u01b0\u1edbc m\u1eb7n\/Cl\u2013.<br \/>\n&#8211; Ren:<br \/>\n  &#8211; L\u1eabn chu\u1ea9n BSPT v\u1edbi NPT \u2192 r\u00f2 r\u1ec9.<br \/>\n  &#8211; Si\u1ebft kh\u00f4 Inox \u2192 galling k\u1eb9t ren; kh\u00f4ng d\u00f9ng m\u1ee1 ch\u1ed1ng k\u1eb9t.<br \/>\n  &#8211; L\u1ea1m d\u1ee5ng PTFE d\u00e0y \u2192 n\u1ee9t ph\u1ee5 ki\u1ec7n m\u1ecfng.<br \/>\n&#8211; B\u00edch:<br \/>\n  &#8211; Ch\u1ecdn sai gio\u0103ng so v\u1edbi nhi\u1ec7t\/\u00e1p\/m\u00f4i ch\u1ea5t (EPDM cho h\u01a1i n\u00f3ng \u2192 l\u00e3o h\u00f3a nhanh).<br \/>\n  &#8211; Si\u1ebft l\u1ec7ch, kh\u00f4ng theo m\u00f4-men \u2192 r\u00f2 sau ch\u1ea1y th\u1eed.<br \/>\n  &#8211; Tr\u1ed9n ti\u00eau chu\u1ea9n b\u00edch (ASME \u2013 EN \u2013 JIS) \u2192 kh\u00f4ng l\u1eafp kh\u1edbp.<\/p>\n<h2 id=\"toc-7-quy-trinh-kiem-soat-chat-luong-va-thu-nghiem\">Quy tr\u00ecnh ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 th\u1eed nghi\u1ec7m<\/h2>\n<p>&#8211; T\u00e0i li\u1ec7u: WPS\/PQR, ch\u1ee9ng ch\u1ec9 v\u1eadt li\u1ec7u (MTC), ch\u1ee9ng nh\u1eadn th\u1ee3 h\u00e0n.<br \/>\n&#8211; NDT: VT\/PT cho t\u1ea5t c\u1ea3 m\u1ed1i h\u00e0n; RT\/UT cho tuy\u1ebfn \u00e1p l\u1ef1c ho\u1eb7c theo y\u00eau c\u1ea7u thi\u1ebft k\u1ebf.<br \/>\n&#8211; Th\u1eed k\u00edn: th\u1ee7y l\u1ef1c theo m\u00e3 (th\u01b0\u1eddng 1,3\u20131,5 l\u1ea7n \u00e1p v\u1eadn h\u00e0nh); ho\u1eb7c kh\u00ed n\u00e9n c\u00f3 gi\u00e1m s\u00e1t an to\u00e0n.<br \/>\n&#8211; L\u00e0m s\u1ea1ch \u2013 th\u1ee5 \u0111\u1ed9ng h\u00f3a: theo ASTM A380\/A967; s\u00fac r\u1eeda\/\u0111\u00e1nh pass t\u1ea1o l\u1edbp th\u1ee5 \u0111\u1ed9ng b\u1ec1n.<br \/>\n&#8211; Ghi nh\u1eadn torque bul\u00f4ng, s\u1ed1 l\u00f4 gio\u0103ng, b\u00e1o c\u00e1o leak test.<\/p>\n<h2 id=\"toc-8-cau-hoi-nhanh\">C\u00e2u h\u1ecfi nhanh<\/h2>\n<p>&#8211; C\u00f3 n\u00ean h\u00e0n \u1ed1ng Inox 201 cho h\u1ec7 n\u01b0\u1edbc?<br \/>\n  &#8211; Kh\u00f4ng khuy\u1ebfn kh\u00edch. 201 k\u00e9m b\u1ec1n \u0103n m\u00f2n Cl\u2013; 304\/316 an to\u00e0n h\u01a1n, 316\/316L cho n\u01b0\u1edbc m\u1eb7n\/h\u00f3a ch\u1ea5t.<br \/>\n&#8211; K\u1ebft n\u1ed1i Inox v\u1edbi th\u00e9p carbon th\u1ebf n\u00e0o \u0111\u1ec3 h\u1ea1n ch\u1ebf \u0103n m\u00f2n \u0111i\u1ec7n h\u00f3a?<br \/>\n  &#8211; \u01afu ti\u00ean b\u00edch trung gian, gio\u0103ng c\u00e1ch \u0111i\u1ec7n, ho\u1eb7c d\u00f9ng b\u1ed9 c\u00e1ch \u0111i\u1ec7n cho bul\u00f4ng; s\u01a1n\/b\u1ecdc c\u00e1ch ly ph\u1ea7n carbon.<br \/>\n&#8211; \u1ed0ng m\u1ecfng Schedule 10 c\u00f3 h\u00e0n \u0111\u01b0\u1ee3c kh\u00f4ng?<br \/>\n  &#8211; \u0110\u01b0\u1ee3c, nh\u01b0ng c\u1ea7n ki\u1ec3m so\u00e1t nhi\u1ec7t, kh\u00ed l\u00f3t t\u1ed1t; d\u00f9ng d\u00e2y\/que L, quy tr\u00ecnh TIG \u1ed5n \u0111\u1ecbnh.<\/p>\n<h2 id=\"toc-9-nguon-tham-khao\">Ngu\u1ed3n tham kh\u1ea3o<\/h2>\n<p>&#8211; ASTM A312, ASTM A554 \u2013 ti\u00eau chu\u1ea9n \u1ed1ng Inox.<br \/>\n&#8211; ASME B16.5 (b\u00edch), ASME B16.9 (ph\u1ee5 ki\u1ec7n h\u00e0n), ASME B1.20.1 (ren NPT).<br \/>\n&#8211; EN 1092-1 (b\u00edch PN), ISO 7-1 v\u00e0 ISO 228-1 (ren BSPT\/R\/G).<br \/>\n&#8211; ASME B31.3 \u2013 Quy ph\u1ea1m \u0111\u01b0\u1eddng \u1ed1ng c\u00f4ng ngh\u1ec7.<br \/>\n&#8211; ASTM A380\/A967 \u2013 L\u00e0m s\u1ea1ch v\u00e0 th\u1ee5 \u0111\u1ed9ng h\u00f3a Inox.<br \/>\n&#8211; H\u01b0\u1edbng d\u1eabn l\u1eafp \u0111\u1eb7t gio\u0103ng\/si\u1ebft l\u1ef1c t\u1eeb nh\u00e0 s\u1ea3n xu\u1ea5t gio\u0103ng xo\u1eafn (VD: Flexitallic, Klinger).<\/p>\n<h2 id=\"toc-10-ket-luan\">K\u1ebft lu\u1eadn<\/h2>\n<p>&#8211; H\u00e0n l\u00e0 l\u1ef1a ch\u1ecdn t\u1ed1i \u01b0u cho \u0111\u1ed9 k\u00edn, \u00e1p l\u1ef1c, nhi\u1ec7t \u0111\u1ed9 v\u00e0 v\u1ec7 sinh; y\u00eau c\u1ea7u tay ngh\u1ec1 v\u00e0 x\u1eed l\u00fd sau h\u00e0n nghi\u00eam ng\u1eb7t.<br \/>\n&#8211; N\u1ed1i ren ph\u00f9 h\u1ee3p DN nh\u1ecf, \u00e1p trung b\u00ecnh \u2013 th\u1ea5p, thi c\u00f4ng nhanh nh\u01b0ng h\u1ea1n ch\u1ebf v\u1ec1 v\u1ec7 sinh v\u00e0 nguy c\u01a1 r\u00f2.<br \/>\n&#8211; N\u1ed1i b\u00edch t\u1ed1i \u01b0u cho th\u00e1o l\u1eafp, \u0111\u1ecbnh chu\u1ea9n v\u00e0 \u00e1p l\u1ef1c r\u1ed9ng; ph\u1ee5 thu\u1ed9c ch\u1ecdn \u0111\u00fang ti\u00eau chu\u1ea9n b\u00edch\/gio\u0103ng v\u00e0 si\u1ebft l\u1ef1c.<br \/>\nG\u1ee3i \u00fd t\u1ed5ng qu\u00e1t: DN \u2264 2&#8243; v\u00e0 ph\u1ee5 tr\u1ee3 ch\u1ecdn ren; tuy\u1ebfn ch\u00ednh v\u00e0 h\u1ec7 quan tr\u1ecdng ch\u1ecdn h\u00e0n; c\u00e1c \u0111i\u1ec3m thi\u1ebft b\u1ecb\/van c\u1ea7n th\u00e1o l\u1eafp d\u00f9ng b\u00edch \u0111\u1ed3ng b\u1ed9 ti\u00eau chu\u1ea9n. Ch\u1ecdn m\u00e1c 304\/316L theo m\u00f4i ch\u1ea5t, tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n v\u00e0 ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng \u0111\u1ec3 h\u1ec7 th\u1ed1ng v\u1eadn h\u00e0nh b\u1ec1n b\u1ec9, an to\u00e0n.<\/p>\n<p>C\u1ea7n t\u01b0 v\u1ea5n k\u1ef9 thu\u1eadt, b\u00e1o gi\u00e1 \u1ed1ng\/ph\u1ee5 ki\u1ec7n Inox 201\/304\/316, b\u00edch JIS\/EN\/ASME v\u00e0 d\u1ecbch v\u1ee5 gia c\u00f4ng h\u00e0n \u0111\u1ea1t chu\u1ea9n? Li\u00ean h\u1ec7 Inox C\u01b0\u1eddng Th\u1ecbnh \u2013 Hotline: 0343.417.281. Email: inoxcongnghiep.cuongthinh@gmail.com<\/p>\n","protected":false},"excerpt":{"rendered":"<p>So s\u00e1nh h\u00e0n, n\u1ed1i ren, n\u1ed1i b\u00edch cho \u1ed1ng inox: ph\u1ea1m vi d\u00f9ng, \u00e1p l\u1ef1c, \u0111\u1ed9 k\u00edn, v\u1ec7 sinh, chi ph\u00ed, quy tr\u00ecnh thi c\u00f4ng v\u00e0 ti\u00eau chu\u1ea9n li\u00ean quan.<\/p>\n","protected":false},"author":7,"featured_media":1022,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-2110","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\/2110","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=2110"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/2110\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1022"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=2110"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=2110"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=2110"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}