{"id":3690,"date":"2026-05-09T08:52:31","date_gmt":"2026-05-09T08:52:31","guid":{"rendered":"https:\/\/productionscrews.com\/threaded-bar\/"},"modified":"2026-05-09T08:53:14","modified_gmt":"2026-05-09T08:53:14","slug":"threaded-bar","status":"publish","type":"post","link":"https:\/\/productionscrews.com\/vi\/threaded-bar\/","title":{"rendered":"Thanh ren: H\u01b0\u1edbng d\u1eabn \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 c\u00e1c lo\u1ea1i, c\u1ea5p \u0111\u1ed9 v\u00e0 \u1ee9ng d\u1ee5ng (2026)"},"content":{"rendered":"

Thanh ren l\u00e0 m\u1ed9t thanh kim lo\u1ea1i c\u00f3 ren xo\u1eafn li\u00ean t\u1ee5c d\u1ecdc to\u00e0n b\u1ed9 chi\u1ec1u d\u00e0i, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 c\u1ed1 \u0111\u1ecbnh, neo gi\u1eef v\u00e0 ch\u1ecbu l\u1ef1c c\u0103ng trong c\u00e1c \u1ee9ng d\u1ee5ng x\u00e2y d\u1ef1ng, c\u01a1 kh\u00ed v\u00e0 c\u00f4ng nghi\u1ec7p. Kh\u00e1c v\u1edbi bu l\u00f4ng ti\u00eau chu\u1ea9n, n\u00f3 kh\u00f4ng c\u00f3 \u0111\u1ea7u \u2014 c\u1ea3 hai \u0111\u1ea7u \u0111\u1ec1u c\u00f3 th\u1ec3 l\u1eafp \u0111ai \u1ed1c, khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh lo\u1ea1i ch\u1ed1t linh ho\u1ea1t nh\u1ea5t cho c\u00e1c k\u1ebft n\u1ed1i c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh.<\/strong><\/p>\n

\u0110i qua b\u1ea5t k\u1ef3 c\u00f4ng tr\u01b0\u1eddng x\u00e2y d\u1ef1ng th\u01b0\u01a1ng m\u1ea1i n\u00e0o, b\u1ea1n s\u1ebd th\u1ea5y thanh ren \u0111ang l\u00e0m nh\u1eefng c\u00f4ng vi\u1ec7c th\u1ea7m l\u1eb7ng: treo h\u1ec7 th\u1ed1ng \u1ed1ng gi\u00f3 HVAC t\u1eeb tr\u1ea7n b\u00ea t\u00f4ng, neo gi\u1eef k\u1ebft c\u1ea5u th\u00e9p v\u00e0o m\u00f3ng v\u00e0 k\u1ebft n\u1ed1i gi\u00e1 treo \u1ed1ng tr\u00ean h\u00e0ng tr\u0103m m\u00e9t d\u00e0i. \u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng lo\u1ea1i ch\u1ed1t \u00edt n\u1ed5i b\u1eadt nh\u1ea5t trong m\u1ed9t t\u00f2a nh\u00e0, nh\u01b0ng l\u1ea1i l\u00e0 m\u1ed9t trong nh\u1eefng lo\u1ea1i ch\u1ecbu t\u1ea3i quan tr\u1ecdng nh\u1ea5t. Ch\u1ecdn sai c\u1ea5p ho\u1eb7c sai \u0111\u01b0\u1eddng k\u00ednh c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn h\u1eadu qu\u1ea3 t\u1eeb h\u1ec7 th\u1ed1ng tr\u1ea7n rung l\u1eafc \u0111\u1ebfn s\u1ef1 c\u1ed1 k\u1ebft c\u1ea5u nghi\u00eam tr\u1ecdng.<\/p>\n

H\u01b0\u1edbng d\u1eabn n\u00e0y bao g\u1ed3m t\u1ea5t c\u1ea3 nh\u1eefng g\u00ec k\u1ef9 s\u01b0, nh\u00e0 th\u1ea7u v\u00e0 \u0111\u1ed9i ng\u0169 mua h\u00e0ng c\u1ea7n \u0111\u1ec3 l\u1ef1a ch\u1ecdn \u0111\u00fang \u2014 c\u1ea5p \u0111\u1ed9, v\u1eadt li\u1ec7u, ti\u00eau chu\u1ea9n ren, d\u1eef li\u1ec7u t\u1ea3i tr\u1ecdng, c\u00e1c l\u1ef1a ch\u1ecdn ch\u1ed1ng \u0103n m\u00f2n v\u00e0 khuy\u1ebfn ngh\u1ecb \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3 m\u00e0 c\u00e1c trang danh m\u1ee5c b\u00e1n l\u1ebb kh\u00f4ng cung c\u1ea5p.<\/p>\n

\"Thanh<\/p>\n

\n

Thanh ren l\u00e0 g\u00ec?<\/h2>\n

Thanh ren \u2014 c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 thanh ren to\u00e0n b\u1ed9<\/strong>, thanh ren su\u1ed1t<\/strong>, ho\u1eb7c ren to\u00e0n b\u1ed9<\/strong> \u2014 l\u00e0 m\u1ed9t lo\u1ea1i ch\u1ed1t \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi m\u1ed9t \u0111\u1eb7c \u0111i\u1ec3m: ren li\u00ean t\u1ee5c t\u1eeb \u0111\u1ea7u n\u00e0y \u0111\u1ebfn \u0111\u1ea7u kia. Kh\u00f4ng c\u00f3 \u0111\u1ea7u, kh\u00f4ng c\u00f3 vai, kh\u00f4ng c\u00f3 \u0111o\u1ea1n tr\u01a1n kh\u00f4ng ren. To\u00e0n b\u1ed9 thanh \u0111\u1ec1u c\u00f3 ren.<\/p>\n

Ch\u1ec9 m\u1ed9t quy\u1ebft \u0111\u1ecbnh thi\u1ebft k\u1ebf n\u00e0y \u0111\u00e3 t\u1ea1o ra s\u1ef1 linh ho\u1ea1t to l\u1edbn. Thanh ren c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1eaft th\u00e0nh b\u1ea5t k\u1ef3 chi\u1ec1u d\u00e0i n\u00e0o t\u1ea1i c\u00f4ng tr\u01b0\u1eddng. N\u00f3 c\u00f3 th\u1ec3 l\u1eafp \u0111ai \u1ed1c l\u1ee5c gi\u00e1c, \u0111ai \u1ed1c n\u1ed1i ho\u1eb7c \u0111ai \u1ed1c b\u00edch \u1edf b\u1ea5t k\u1ef3 v\u1ecb tr\u00ed n\u00e0o d\u1ecdc theo chi\u1ec1u d\u00e0i. N\u00f3 c\u00f3 th\u1ec3 truy\u1ec1n l\u1ef1c c\u0103ng, n\u00e9n ho\u1eb7c c\u1eaft t\u00f9y theo c\u00e1ch l\u1eafp \u0111\u1eb7t. Kh\u00f4ng c\u00f3 lo\u1ea1i ch\u1ed1t th\u00f4ng d\u1ee5ng n\u00e0o kh\u00e1c cung c\u1ea5p ph\u1ea1m vi \u0111i\u1ec1u ch\u1ec9nh nh\u01b0 v\u1eady.<\/p>\n

Lo\u1ea1i g\u1ea7n gi\u1ed1ng nh\u1ea5t l\u00e0 bu l\u00f4ng hai \u0111\u1ea7u<\/strong>, ch\u1ec9 \u0111\u01b0\u1ee3c ti\u1ec7n ren \u1edf hai \u0111\u1ea7u v\u1edbi \u0111o\u1ea1n gi\u1eefa tr\u01a1n. Bu l\u00f4ng hai \u0111\u1ea7u \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho chi\u1ec1u d\u00e0i k\u1eb9p v\u00e0 gi\u00e1 tr\u1ecb m\u00f4-men xo\u1eafn c\u1ee5 th\u1ec3 \u2014 kh\u00f4ng th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh t\u1ea1i c\u00f4ng tr\u01b0\u1eddng. Ng\u01b0\u1ee3c l\u1ea1i, thanh ren \u0111\u01b0\u1ee3c c\u1eaft theo chi\u1ec1u d\u00e0i t\u1ea1i ch\u1ed7, v\u00ec v\u1eady n\u00f3 l\u00e0 l\u1ef1a ch\u1ecdn \u01b0u ti\u00ean cho c\u00e1c \u1ee9ng d\u1ee5ng m\u00e0 k\u00edch th\u01b0\u1edbc k\u1ebft n\u1ed1i ch\u00ednh x\u00e1c ch\u1ec9 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh v\u00e0o ng\u00e0y l\u1eafp \u0111\u1eb7t.<\/p>\n

H\u00ecnh d\u1ea1ng v\u00e0 b\u01b0\u1edbc ren<\/h3>\n

H\u1ea7u h\u1ebft c\u00e1c thanh ren t\u1ea1i Vi\u1ec7t Nam s\u1eed d\u1ee5ng ren h\u1ec7 m\u00e9t th\u00f4 (UNC)<\/strong> l\u00e0 ti\u00eau chu\u1ea9n m\u1eb7c \u0111\u1ecbnh tr\u1eeb khi c\u00f3 ch\u1ec9 \u0111\u1ecbnh kh\u00e1c. Ren UNC c\u00f3 b\u01b0\u1edbc ren l\u1edbn \u2014 \u00edt ren tr\u00ean m\u1ed7i inch \u2014 gi\u00fap l\u1eafp r\u00e1p nhanh h\u01a1n, d\u1ec5 l\u00e0m s\u1ea1ch khi c\u00f3 b\u1ee5i b\u1ea9n v\u00e0 d\u1ec5 c\u1eaft t\u1ea1i c\u00f4ng tr\u01b0\u1eddng.<\/p>\n

Ren h\u1ec7 m\u00e9t m\u1ecbn (UNF)<\/strong> c\u0169ng c\u00f3 nh\u01b0ng \u00edt ph\u1ed5 bi\u1ebfn trong c\u00e1c \u1ee9ng d\u1ee5ng k\u1ebft c\u1ea5u. Ren m\u1ecbn cho kh\u1ea3 n\u0103ng \u0103n kh\u1edbp ren cao h\u01a1n tr\u00ean m\u1ed7i \u0111\u01a1n v\u1ecb chi\u1ec1u d\u00e0i v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c k\u00e9o \u0111\u1ee9t cao h\u01a1n m\u1ed9t ch\u00fat, nh\u01b0ng d\u1ec5 b\u1ecb tu\u1ed9t ren khi si\u1ebft m\u00f4-men xo\u1eafn l\u1edbn v\u00e0 kh\u00f3 gi\u1eef s\u1ea1ch t\u1ea1i c\u00f4ng tr\u01b0\u1eddng.<\/p>\n

\u1ede c\u00e1c th\u1ecb tr\u01b0\u1eddng s\u1eed d\u1ee5ng h\u1ec7 m\u00e9t, ISO ren th\u00f4 m\u00e9t (MC)<\/strong> l\u00e0 ti\u00eau chu\u1ea9n, \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh l\u00e0 M10, M12, M16, M20, v.v. Thanh ren 1\/2\u2033-13 UNC v\u00e0 thanh M12 c\u00f3 \u0111\u01b0\u1eddng k\u00ednh g\u1ea7n gi\u1ed1ng nhau nh\u01b0ng kh\u00f4ng th\u1ec3 thay th\u1ebf cho nhau \u2014 h\u00ecnh d\u1ea1ng ren, b\u01b0\u1edbc ren v\u00e0 t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc kh\u00e1c nhau. Lu\u00f4n ki\u1ec3m tra ti\u00eau chu\u1ea9n ren tr\u01b0\u1edbc khi \u0111\u1eb7t mua v\u1eadt t\u01b0 t\u1eeb n\u01b0\u1edbc ngo\u00e0i.<\/p>\n

S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa thanh ren v\u00e0 th\u00e9p c\u00e2y<\/h3>\n

\u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng c\u00e2u h\u1ecfi ph\u1ed5 bi\u1ebfn nh\u1ea5t t\u1ea1i c\u00f4ng tr\u01b0\u1eddng, v\u00e0 c\u00e2u tr\u1ea3 l\u1eddi r\u1ea5t quan tr\u1ecdng. Theo B\u00e0i vi\u1ebft Wikipedia v\u1ec1 thanh ren<\/a>, thanh ren \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t theo ti\u00eau chu\u1ea9n bu l\u00f4ng (ASTM F1554, A307, A354, v.v.) v\u00e0 \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh theo \u0111\u01b0\u1eddng k\u00ednh ren, b\u01b0\u1edbc ren v\u00e0 c\u1ea5p v\u1eadt li\u1ec7u. Th\u00e9p c\u00e2y (th\u00e9p gia c\u01b0\u1eddng)<\/strong> \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t theo ti\u00eau chu\u1ea9n b\u00ea t\u00f4ng k\u1ebft c\u1ea5u (ASTM A615, A706) v\u00e0 \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh theo s\u1ed1 hi\u1ec7u thanh v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 ch\u1ecbu k\u00e9o.<\/p>\n

\u0110i\u1ec3m kh\u00e1c bi\u1ec7t quan tr\u1ecdng: th\u00e9p c\u00e2y c\u00f3 b\u1ec1 m\u1eb7t bi\u1ebfn d\u1ea1ng<\/strong> \u2014 c\u00e1c g\u00e2n v\u00e0 r\u00e3nh \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 li\u00ean k\u1ebft c\u01a1 h\u1ecdc v\u1edbi b\u00ea t\u00f4ng. N\u00f3 kh\u00f4ng c\u00f3 ren theo ngh\u0129a th\u00f4ng th\u01b0\u1eddng. Th\u00e9p c\u00e2y c\u00f3 ren (\u0111\u00f4i khi g\u1ecdi l\u00e0 h\u1ec7 th\u1ed1ng n\u1ed1i th\u00e9p c\u00e2y c\u00f3 ren<\/strong>) l\u00e0 s\u1ea3n ph\u1ea9m chuy\u00ean d\u1ee5ng, th\u00eam ren ti\u00eau chu\u1ea9n v\u00e0o \u0111\u1ea7u thanh th\u00e9p \u0111\u1ec3 n\u1ed1i c\u01a1 h\u1ecdc \u2014 \u0111\u00e2y l\u00e0 bi\u1ebfn th\u1ec3 c\u1ee7a th\u00e9p c\u00e2y, kh\u00f4ng ph\u1ea3i s\u1ea3n ph\u1ea9m thanh ren.<\/p>\n

C\u00f3 th\u1ec3 d\u00f9ng thanh ren thay cho th\u00e9p c\u00e2y \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh kh\u00f4ng? Kh\u00f4ng. Th\u00e9p c\u00e2y v\u00e0 thanh ren \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c c\u01a1 ch\u1ebf truy\u1ec1n l\u1ef1c kh\u00e1c nhau. Vi\u1ec7c thay th\u1ebf m\u00e0 kh\u00f4ng c\u00f3 s\u1ef1 ph\u00ea duy\u1ec7t k\u1ef9 thu\u1eadt l\u00e0 vi ph\u1ea1m quy chu\u1ea9n.<\/p>\n\n\n\n\n\n\n\n\n\n\n
Thu\u1ed9c t\u00ednh<\/th>\nThanh ren<\/th>\nTh\u00e9p c\u00e2y (A615 Gr.60)<\/th>\n<\/tr>\n<\/thead>\n
B\u1ec1 m\u1eb7t<\/td>\nRen xo\u1eafn li\u00ean t\u1ee5c<\/td>\nG\u00e2n bi\u1ebfn d\u1ea1ng \u0111\u1ec3 li\u00ean k\u1ebft v\u1edbi b\u00ea t\u00f4ng<\/td>\n<\/tr>\n
\u0110\u01b0\u1eddng truy\u1ec1n t\u1ea3i ch\u00ednh<\/td>\nK\u00e9o\/n\u00e9n d\u1ecdc tr\u1ee5c qua \u0111\u1ec7m \u0111ai \u1ed1c<\/td>\nLi\u00ean k\u1ebft b\u00ea t\u00f4ng \/ n\u1ed1i ch\u1ed3ng c\u1ed1t th\u00e9p<\/td>\n<\/tr>\n
Ti\u00eau chu\u1ea9n k\u1ef9 thu\u1eadt<\/td>\nASTM F1554, A307, A354, B7<\/td>\nASTM A615, A706<\/td>\n<\/tr>\n
C\u1eaft t\u1ea1i c\u00f4ng tr\u01b0\u1eddng<\/td>\nC\u00f3 (thanh ren to\u00e0n b\u1ed9 theo \u0111\u1ecbnh ngh\u0129a)<\/td>\nC\u00f3<\/td>\n<\/tr>\n
K\u1ebft n\u1ed1i \u0111i\u1ec1u ch\u1ec9nh \u0111\u01b0\u1ee3c<\/td>\nC\u00f3 (\u0111ai \u1ed1c t\u1ea1i b\u1ea5t k\u1ef3 v\u1ecb tr\u00ed n\u00e0o)<\/td>\nNo<\/td>\n<\/tr>\n
B\u1ea3o v\u1ec7 ch\u1ed1ng \u0103n m\u00f2n<\/td>\nM\u1ea1 k\u1ebdm nh\u00fang n\u00f3ng, th\u00e9p kh\u00f4ng g\u1ec9, ph\u1ee7 epoxy<\/td>\nPh\u1ee7 epoxy, m\u1ea1 k\u1ebdm (chuy\u00ean d\u1ee5ng)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n

C\u00e1c lo\u1ea1i thanh ren<\/h2>\n

Thanh ren \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i \u0111\u1ea7u ti\u00ean theo d\u1ea1ng ren<\/strong> (UNC, UNF, h\u1ec7 m\u00e9t), sau \u0111\u00f3 theo v\u1eadt li\u1ec7u v\u00e0 x\u1eed l\u00fd b\u1ec1 m\u1eb7t<\/strong>, v\u00e0 cu\u1ed1i c\u00f9ng theo k\u00fd hi\u1ec7u c\u1ea5p b\u1eadc<\/strong>Hi\u1ec3u \u0111\u1ea7y \u0111\u1ee7 c\u1ea3 ba chi\u1ec1u l\u00e0 c\u00e1ch duy nh\u1ea5t \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c.<\/p>\n

\"Thanh<\/p>\n

Theo v\u1eadt li\u1ec7u<\/h3>\n

Th\u00e9p cacbon (th\u00e9p th\u01b0\u1eddng\/\u0111en)<\/strong>
\nLo\u1ea1i ph\u1ed5 bi\u1ebfn nh\u1ea5t. Thanh ren th\u00e9p cacbon chi\u1ebfm ph\u1ea7n l\u1edbn c\u00e1c \u1ee9ng d\u1ee5ng li\u00ean k\u1ebft trong m\u00f4i tr\u01b0\u1eddng kh\u00f4, trong nh\u00e0. Gi\u00e1 th\u00e0nh th\u1ea5p, c\u00f3 s\u1eb5n \u1edf m\u1ecdi k\u00edch th\u01b0\u1edbc ti\u00eau chu\u1ea9n v\u00e0 d\u1ec5 c\u1eaft, t\u1ea1o ren. Nh\u01b0\u1ee3c \u0111i\u1ec3m: b\u1ecb g\u1ec9 nhanh khi ti\u1ebfp x\u00fac v\u1edbi \u0111\u1ed9 \u1ea9m. Ch\u1ec9 s\u1eed d\u1ee5ng khi c\u1ee5m l\u1eafp r\u00e1p \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 kh\u1ecfi th\u1eddi ti\u1ebft v\u00e0 ng\u01b0ng t\u1ee5.<\/p>\n

Phun m\u1ea1 k\u1ebdm nh\u00fang n\u00f3ng (HDG)<\/strong>
\nThanh ren m\u1ea1 k\u1ebdm nh\u00fang n\u00f3ng \u0111\u01b0\u1ee3c ph\u1ee7 k\u1ebdm v\u1edbi tr\u1ecdng l\u01b0\u1ee3ng l\u1edbp ph\u1ee7 t\u1ed1i thi\u1ec3u 1,7 oz\/ft\u00b2 (ASTM A153 Class C). K\u1ebdm cung c\u1ea5p b\u1ea3o v\u1ec7 \u0111i\u1ec7n h\u00f3a \u2014 n\u00f3 hy sinh b\u1ea3n th\u00e2n \u0111\u1ec3 b\u1ea3o v\u1ec7 n\u1ec1n th\u00e9p. HDG l\u00e0 l\u1ef1a ch\u1ecdn ti\u00eau chu\u1ea9n cho x\u00e2y d\u1ef1ng ngo\u00e0i tr\u1eddi, gi\u00e1 \u0111\u1ee1 c\u01a1 kh\u00ed tr\u00ean m\u00e1i v\u00e0 b\u1ea5t k\u1ef3 \u1ee9ng d\u1ee5ng n\u00e0o ti\u1ebfp x\u00fac v\u1edbi \u0111\u1ed9 \u1ea9m kh\u00f4ng li\u00ean t\u1ee5c. L\u01b0u \u00fd r\u1eb1ng ren HDG h\u01a1i l\u1edbn h\u01a1n do l\u1edbp ph\u1ee7; \u0111ai \u1ed1c gh\u00e9p ph\u1ea3i \u0111\u01b0\u1ee3c m\u1ea1 k\u1ebdm (ho\u1eb7c l\u1edbn h\u01a1n) \u0111\u1ec3 tr\u00e1nh b\u1ecb l\u1ec7ch ren.<\/p>\n

Th\u00e9p kh\u00f4ng g\u1ec9 (304, 316)<\/strong>
\nThanh ren inox lo\u1ea1i b\u1ecf lo ng\u1ea1i v\u1ec1 \u0103n m\u00f2n trong h\u1ea7u h\u1ebft c\u00e1c m\u00f4i tr\u01b0\u1eddng. M\u00e1c 304<\/strong> ph\u00f9 h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng kh\u00ed quy\u1ec3n th\u00f4ng th\u01b0\u1eddng v\u00e0 th\u1ef1c ph\u1ea9m. M\u00e1c 316<\/strong> b\u1ed5 sung molypden \u0111\u1ec3 ch\u1ed1ng \u0103n m\u00f2n do clo \u2014 l\u1ef1a ch\u1ecdn \u0111\u00fang cho m\u00f4i tr\u01b0\u1eddng ven bi\u1ec3n, nh\u00e0 m\u00e1y h\u00f3a ch\u1ea5t v\u00e0 k\u1ebft c\u1ea5u h\u1ed3 b\u01a1i. Inox c\u00f3 gi\u00e1 cao h\u01a1n th\u00e9p cacbon th\u01b0\u1eddng c\u00f9ng \u0111\u01b0\u1eddng k\u00ednh v\u00e0 chi\u1ec1u d\u00e0i t\u1eeb 4\u20136 l\u1ea7n, n\u00ean ch\u1ec9 \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh khi y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 ch\u1ed1ng \u0103n m\u00f2n l\u00e0 b\u1eaft bu\u1ed9c.<\/p>\n

\u0110\u1ed3ng thau v\u00e0 \u0111\u1ed3ng \u0111\u1ecf<\/strong>
\nV\u1eadt li\u1ec7u chuy\u00ean d\u1ee5ng cho n\u1ed1i \u0111\u1ea5t \u0111i\u1ec7n, thi\u1ebft b\u1ecb h\u00e0ng h\u1ea3i v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u t\u00ednh kh\u00f4ng t\u1eeb ho\u1eb7c kh\u00f4ng ph\u00e1t tia l\u1eeda. Thanh ren \u0111\u1ed3ng thau c\u00f3 \u0111\u1ed9 b\u1ec1n k\u00e9o kho\u1ea3ng m\u1ed9t n\u1eeda so v\u1edbi th\u00e9p cacbon, n\u00ean t\u1ea3i tr\u1ecdng k\u1ebft c\u1ea5u ph\u1ea3i \u0111\u01b0\u1ee3c gi\u1ea3m ph\u00f9 h\u1ee3p.<\/p>\n

Th\u00e9p h\u1ee3p kim B7 (ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao)<\/strong>
\nThanh ren B7 (ASTM A193 Grade B7) l\u00e0 th\u00e9p h\u1ee3p kim crom-molypden, \u0111\u01b0\u1ee3c t\u00f4i v\u00e0 ram. \u0110\u00e2y l\u00e0 ti\u00eau chu\u1ea9n cho c\u00e1c m\u1ed1i n\u1ed1i m\u1eb7t b\u00edch trong b\u00ecnh \u00e1p l\u1ef1c, \u0111\u01b0\u1eddng \u1ed1ng h\u01a1i v\u00e0 \u0111\u01b0\u1eddng \u1ed1ng c\u00f4ng nghi\u1ec7p ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao \u2014 nh\u1eefng \u1ee9ng d\u1ee5ng m\u00e0 th\u00e9p cacbon m\u1ea5t \u0111\u1ed9 b\u1ec1n \u1edf nhi\u1ec7t \u0111\u1ed9 cao. \u0110\u1ed9 b\u1ec1n ch\u1ea3y t\u1ed1i thi\u1ec3u: 105 ksi (so v\u1edbi 36 ksi cho th\u00e9p A36). Lu\u00f4n k\u1ebft h\u1ee3p thanh ren B7 v\u1edbi \u0111ai \u1ed1c l\u1ee5c gi\u00e1c n\u1eb7ng 2H theo ASTM A194.<\/p>\n

Theo k\u00fd hi\u1ec7u c\u1ea5p \u0111\u1ed9<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n
C\u1ea5p \u0111\u1ed9<\/th>\nTi\u00eau chu\u1ea9n<\/th>\n\u0110\u1ed9 b\u1ec1n ch\u1ea3y t\u1ed1i thi\u1ec3u<\/th>\nC\u00e1c \u1ee8ng D\u1ee5ng Ph\u1ed5 Bi\u1ebfn<\/th>\n<\/tr>\n<\/thead>\n
C\u1ea5p 2 \/ A307<\/td>\nASTM A307<\/td>\n36 ksi<\/td>\nGi\u00e1 treo nh\u1eb9, li\u00ean k\u1ebft kh\u00f4ng ch\u1ecbu l\u1ef1c<\/td>\n<\/tr>\n
C\u1ea5p 5 (SAE)<\/td>\nSAE J429<\/td>\n92 ksi<\/td>\nLi\u00ean k\u1ebft c\u01a1 kh\u00ed th\u00f4ng th\u01b0\u1eddng<\/td>\n<\/tr>\n
C\u1ea5p 8 (SAE)<\/td>\nSAE J429<\/td>\n130 ksi<\/td>\nL\u1eafp r\u00e1p c\u01a1 kh\u00ed c\u01b0\u1eddng \u0111\u1ed9 cao<\/td>\n<\/tr>\n
F1554 Gr.36<\/td>\nASTM F1554<\/td>\n36 ksi<\/td>\nBu l\u00f4ng neo, ch\u00f4n trong b\u00ea t\u00f4ng<\/td>\n<\/tr>\n
F1554 Gr.55<\/td>\nASTM F1554<\/td>\n55 ksi<\/td>\nBu l\u00f4ng neo, t\u1ea3i tr\u1ecdng trung b\u00ecnh<\/td>\n<\/tr>\n
F1554 Gr.105<\/td>\nASTM F1554<\/td>\n105 ksi<\/td>\nBu l\u00f4ng neo t\u1ea3i tr\u1ecdng l\u1edbn<\/td>\n<\/tr>\n
B7<\/td>\nASTM A193<\/td>\n105 ksi<\/td>\nM\u1ed1i n\u1ed1i m\u1eb7t b\u00edch ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao<\/td>\n<\/tr>\n
L7<\/td>\nASTM A320<\/td>\n105 ksi<\/td>\n\u1ee8ng d\u1ee5ng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p \/ l\u1ea1nh s\u00e2u<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

D\u00f2ng F1554 x\u1ee9ng \u0111\u00e1ng \u0111\u01b0\u1ee3c c\u00e1c chuy\u00ean gia x\u00e2y d\u1ef1ng ch\u00fa \u00fd \u0111\u1eb7c bi\u1ec7t. Ti\u00eau chu\u1ea9n n\u00e0y \u0111\u01b0\u1ee3c vi\u1ebft ri\u00eang cho thanh neo<\/strong> \u2014 c\u00e1c thanh ren \u0111\u01b0\u1ee3c ch\u00f4n trong b\u00ea t\u00f4ng \u0111\u1ec3 c\u1ed1 \u0111\u1ecbnh c\u1ed9t th\u00e9p k\u1ebft c\u1ea5u, b\u1ea3n \u0111\u1ebf v\u00e0 khung thi\u1ebft b\u1ecb. C\u1ea5p \u0111\u1ed9 (36\/55\/105) ph\u00f9 h\u1ee3p v\u1edbi t\u1ea3i ki\u1ec3m ch\u1ee9ng y\u00eau c\u1ea7u, \u0111\u1ed9 s\u00e2u ch\u00f4n v\u00e0 th\u00f4ng s\u1ed1 b\u1ea3n k\u1ebft n\u1ed1i th\u00e9p. Vi\u1ec7c s\u1eed d\u1ee5ng lo\u1ea1i A307 th\u00f4ng th\u01b0\u1eddng khi \u0111\u00e3 ch\u1ec9 \u0111\u1ecbnh F1554 Gr.105 l\u00e0 m\u1ed9t sai s\u00f3t m\u00e0 ki\u1ec3m tra vi\u00ean s\u1ebd ph\u00e1t hi\u1ec7n v\u00e0 k\u1ef9 s\u01b0 k\u1ebft c\u1ea5u s\u1ebd l\u01b0u \u00fd.<\/p>\n

Theo h\u01b0\u1edbng ren<\/h3>\n

Ph\u1ea7n l\u1edbn c\u00e1c thanh ren s\u1eed d\u1ee5ng ren ph\u1ea3i<\/strong> \u2014 si\u1ebft ch\u1eb7t theo chi\u1ec1u kim \u0111\u1ed3ng h\u1ed3, th\u00e1o l\u1ecfng ng\u01b0\u1ee3c chi\u1ec1u kim \u0111\u1ed3ng h\u1ed3. Thanh ren tr\u00e1i t\u1ed3n t\u1ea1i cho c\u00e1c \u1ee9ng d\u1ee5ng m\u00e0 rung \u0111\u1ed9ng c\u00f3 th\u1ec3 l\u00e0m l\u1ecfng \u0111ai \u1ed1c ren ph\u1ea3i (m\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb quay, linh ki\u1ec7n xe \u0111\u1ea1p, m\u1ed9t s\u1ed1 m\u00e1y m\u00f3c c\u00f4ng nghi\u1ec7p). Lu\u00f4n ch\u1ec9 r\u00f5 h\u01b0\u1edbng ren khi \u0111\u1eb7t h\u00e0ng b\u1ea5t c\u1ee9 th\u1ee9 g\u00ec kh\u00f4ng ph\u1ea3i ren ph\u1ea3i.<\/p>\n

\n

\u1ee8ng d\u1ee5ng c\u00f4ng nghi\u1ec7p c\u1ee7a thanh ren<\/h2>\n

X\u00e2y d\u1ef1ng v\u00e0 li\u00ean k\u1ebft k\u1ebft c\u1ea5u<\/h3>\n

Thanh ren l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a ph\u1ea7n c\u1ee9ng li\u00ean k\u1ebft k\u1ebft c\u1ea5u trong x\u00e2y d\u1ef1ng th\u01b0\u01a1ng m\u1ea1i. Neo t\u1ea5m \u0111\u1ebf c\u1ed9t<\/strong> s\u1eed d\u1ee5ng thanh ren F1554 \u0111\u01b0\u1ee3c \u0111\u00fac v\u00e0o c\u00e1c t\u1ea5m b\u00ea t\u00f4ng; \u0111\u1ea7u ren l\u1ed9 ra nh\u1eadn t\u1ea5m \u0111\u1ebf v\u00e0 \u0111ai \u1ed1c l\u1ee5c gi\u00e1c l\u1edbn ho\u00e0n thi\u1ec7n \u0111\u01b0\u1eddng truy\u1ec1n t\u1ea3i tr\u1ecdng t\u1eeb th\u00e9p k\u1ebft c\u1ea5u xu\u1ed1ng m\u00f3ng. Engineering Toolbox l\u01b0u \u00fd r\u1eb1ng thi\u1ebft k\u1ebf bu l\u00f4ng neo \u0111\u00fang ph\u1ea3i t\u00ednh \u0111\u1ebfn c\u1ea3 kh\u1ea3 n\u0103ng ch\u1ecbu k\u00e9o (h\u1ecfng b\u00ea t\u00f4ng) v\u00e0 l\u1ef1c c\u1eaft t\u1ea1i giao di\u1ec7n t\u1ea5m \u0111\u1ebf.<\/p>\n

H\u1ec7 th\u1ed1ng treo tr\u1ea7n v\u00e0 h\u1ed7 tr\u1ee3 c\u01a1 kh\u00ed<\/strong> l\u00e0 \u1ee9ng d\u1ee5ng c\u00f3 s\u1ed1 l\u01b0\u1ee3ng l\u1edbn nh\u1ea5t theo s\u1ed1 l\u01b0\u1ee3ng chi ti\u1ebft. \u1ed0ng d\u1eabn HVAC, \u0111\u01b0\u1eddng \u1ed1ng \u0111i\u1ec7n, gi\u00e1 treo \u1ed1ng v\u00e0 h\u1ec7 th\u1ed1ng phun n\u01b0\u1edbc \u0111\u1ec1u treo t\u1eeb thanh ren \u0111\u01b0\u1ee3c neo v\u00e0o b\u00ea t\u00f4ng ho\u1eb7c th\u00e9p k\u1ebft c\u1ea5u ph\u00eda tr\u00ean. Ng\u00e0nh C\u01a1 \u0111i\u1ec7n m\u1eb7c \u0111\u1ecbnh s\u1eed d\u1ee5ng 3\/8\u2033-16 UNC cho t\u1ea3i nh\u1eb9 (d\u01b0\u1edbi 200 lb) v\u00e0 1\/2\u2033-13 UNC cho t\u1ea3i trung b\u00ecnh (200\u2013600 lb). T\u1ea3i n\u1eb7ng h\u01a1n c\u1ea7n \u0111\u00e1nh gi\u00e1 k\u1ef9 thu\u1eadt v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh thanh, c\u1ea5p v\u1eadt li\u1ec7u v\u00e0 lo\u1ea1i neo.<\/p>\n

H\u1ec7 th\u1ed1ng c\u1ed1p pha v\u00e0 ch\u1ed1ng \u0111\u1ee1<\/strong> s\u1eed d\u1ee5ng thanh ren l\u00e0m thanh li\u00ean k\u1ebft c\u1ed1p pha \u2014 c\u00e1c thanh k\u00e9o c\u00e1c t\u1ea5m c\u1ed1p pha l\u1ea1i v\u1edbi nhau ch\u1ed1ng l\u1ea1i \u00e1p l\u1ef1c th\u1ee7y t\u0129nh c\u1ee7a b\u00ea t\u00f4ng t\u01b0\u01a1i. Th\u01b0\u1eddng \u0111\u01b0\u1ee3c ph\u1ee7 l\u1edbp ho\u1eb7c b\u1ecdc nh\u1ef1a (l\u1edbp nh\u1ef1a \u0111\u1ec3 l\u1ea1i l\u1ed7 c\u00f3 th\u1ec3 v\u00e1 sau khi th\u00e1o c\u1ed1p pha) v\u00e0 l\u00e0 lo\u1ea1i d\u00f9ng m\u1ed9t l\u1ea7n \u2014 ch\u00fang \u1edf l\u1ea1i trong b\u00ea t\u00f4ng sau khi th\u00e1o c\u1ed1p pha.<\/p>\n

C\u00f4ng nghi\u1ec7p v\u00e0 s\u1ea3n xu\u1ea5t<\/h3>\n

Trong h\u1ec7 th\u1ed1ng \u0111\u01b0\u1eddng \u1ed1ng c\u00f4ng nghi\u1ec7p, Thanh ren B7<\/strong> li\u00ean k\u1ebft c\u00e1c \u0111\u1ea7u m\u1eb7t b\u00edch trong c\u00e1c nh\u00e0 m\u00e1y h\u00f3a d\u1ea7u, c\u01a1 s\u1edf ph\u00e1t \u0111i\u1ec7n v\u00e0 nh\u00e0 m\u00e1y l\u1ecdc d\u1ea7u. M\u1ed9t m\u1ed1i n\u1ed1i m\u1eb7t b\u00edch 8\u2033 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng t\u00e1m bu l\u00f4ng B7, m\u1ed7i bu l\u00f4ng \u0111\u01b0\u1ee3c si\u1ebft \u0111\u00fang gi\u00e1 tr\u1ecb b\u1eb1ng thi\u1ebft b\u1ecb \u0111\u00e3 hi\u1ec7u chu\u1ea9n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u1ea3i tr\u1ecdng \u00e9p gio\u0103ng. Trong \u1ee9ng d\u1ee5ng n\u00e0y, s\u1eed d\u1ee5ng sai c\u1ea5p v\u1eadt li\u1ec7u \u2014 v\u00ed d\u1ee5, A307 khi c\u1ea7n B7 \u2014 c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn h\u1ecfng bu l\u00f4ng \u1edf nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh v\u1edbi h\u1eadu qu\u1ea3 nghi\u00eam tr\u1ecdng.<\/p>\n

\u0110\u1ebf m\u00e1y v\u00e0 h\u1ec7 th\u1ed1ng c\u00e2n b\u1eb1ng<\/strong> s\u1eed d\u1ee5ng thanh ren \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh chi\u1ec1u cao v\u00e0 c\u00e2n b\u1eb1ng thi\u1ebft b\u1ecb tr\u00ean s\u00e0n kh\u00f4ng b\u1eb1ng ph\u1eb3ng. Thanh ren \u0111i qua \u0111ai \u1ed1c h\u00e0n tr\u00ean khung \u0111\u1ebf; xoay thanh s\u1ebd n\u00e2ng ho\u1eb7c h\u1ea1 g\u00f3c \u0111\u00f3. Sau khi c\u00e2n b\u1eb1ng, \u0111ai \u1ed1c kh\u00f3a gi\u1eef v\u1ecb tr\u00ed. \u1ee8ng d\u1ee5ng n\u00e0y \u01b0u ti\u00ean ren m\u1ecbn (UNF) \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh ch\u00ednh x\u00e1c h\u01a1n.<\/p>\n

\u0110i\u1ec7n v\u00e0 vi\u1ec5n th\u00f4ng<\/h3>\n

Thanh ren h\u1ed7 tr\u1ee3 h\u1ec7 th\u1ed1ng m\u00e1ng c\u00e1p<\/strong>, mang c\u00e1c b\u00f3 c\u00e1p \u0111i\u1ec7n v\u00e0 \u0111i\u1ec1u khi\u1ec3n xuy\u00ean su\u1ed1t c\u00e1c t\u00f2a nh\u00e0 c\u00f4ng nghi\u1ec7p v\u00e0 th\u01b0\u01a1ng m\u1ea1i. Gi\u00e1 treo khay c\u00e1p b\u1eb1ng thanh ren h\u1ea7u nh\u01b0 \u0111\u1ec1u l\u00e0 3\/8\u2033-16 \u00d7 nhi\u1ec1u chi\u1ec1u d\u00e0i, m\u1ea1 k\u1ebdm nh\u00fang n\u00f3ng cho c\u00e1c kh\u00f4ng gian plenum n\u01a1i h\u01a1i \u1ea9m t\u1eeb \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n.<\/p>\n

Ph\u1ee5 ki\u1ec7n l\u1eafp \u0111\u1eb7t \u0103ng-ten v\u00e0 th\u00e1p<\/strong> t\u1ea1i c\u00e1c c\u01a1 s\u1edf vi\u1ec5n th\u00f4ng s\u1eed d\u1ee5ng thanh ren b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 cho t\u1ea5t c\u1ea3 c\u00e1c ch\u1ed1t l\u1ed9 ra ngo\u00e0i. S\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa ti\u1ebfp x\u00fac v\u1edbi tia UV, chu k\u1ef3 nhi\u1ec7t \u0111\u1ed9 v\u00e0 (\u1edf c\u00e1c khu v\u1ef1c ven bi\u1ec3n) kh\u00f4ng kh\u00ed mu\u1ed1i khi\u1ebfn th\u00e9p kh\u00f4ng g\u1ec9 tr\u1edf th\u00e0nh v\u1eadt li\u1ec7u duy nh\u1ea5t kh\u00f4ng b\u1ecb \u0103n m\u00f2n \u0111\u1ebfn m\u1ee9c kh\u00f4ng th\u1ec3 di chuy\u1ec3n gi\u1eefa c\u00e1c chu k\u1ef3 ki\u1ec3m tra.<\/p>\n

\n

C\u00e1ch ch\u1ecdn thanh ren ph\u00f9 h\u1ee3p<\/h2>\n

Quy tr\u00ecnh l\u1ef1a ch\u1ecdn c\u00f3 b\u1ed1n bi\u1ebfn s\u1ed1: \u0111\u01b0\u1eddng k\u00ednh<\/strong>, c\u1ea5p \u0111\u1ed9<\/strong>, v\u1eadt li\u1ec7u\/b\u1ec1 m\u1eb7t ho\u00e0n thi\u1ec7n<\/strong>, v\u00e0 d\u1ea1ng ren<\/strong>. T\u1ed1i \u01b0u h\u00f3a theo th\u1ee9 t\u1ef1 \u0111\u00f3.<\/p>\n

\"Thanh<\/p>\n

B\u01b0\u1edbc 1: X\u00e1c \u0111\u1ecbnh t\u1ea3i tr\u1ecdng k\u00e9o y\u00eau c\u1ea7u<\/h3>\n

B\u1eaft \u0111\u1ea7u v\u1edbi t\u1ea3i tr\u1ecdng th\u1ef1c t\u1ebf, sau \u0111\u00f3 \u00e1p d\u1ee5ng h\u1ec7 s\u1ed1 an to\u00e0n. H\u1ea7u h\u1ebft c\u00e1c \u1ee9ng d\u1ee5ng x\u00e2y d\u1ef1ng s\u1eed d\u1ee5ng h\u1ec7 s\u1ed1 an to\u00e0n 3:1 d\u1ef1a tr\u00ean s\u1ee9c k\u00e9o danh \u0111\u1ecbnh c\u1ee7a thanh ren. C\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p gi\u1eef \u00e1p su\u1ea5t (kh\u1edbp m\u1eb7t b\u00edch) tu\u00e2n theo ti\u00eau chu\u1ea9n ASME, \u0111\u1eb7t h\u1ec7 s\u1ed1 an to\u00e0n d\u1ef1a tr\u00ean nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh v\u00e0 ph\u00e2n lo\u1ea1i d\u1ecbch v\u1ee5.<\/p>\n

M\u1ed9t thanh ren 1\/2\u2033-13 UNC c\u1ea5p 5 c\u00f3 di\u1ec7n t\u00edch k\u00e9o l\u00e0 0.1419 in\u00b2 v\u00e0 s\u1ee9c k\u00e9o t\u1ed1i thi\u1ec3u l\u00e0 120 ksi, cho t\u1ea3i tr\u1ecdng k\u00e9o danh \u0111\u1ecbnh kho\u1ea3ng 17.000 lb<\/strong>. V\u1edbi h\u1ec7 s\u1ed1 an to\u00e0n 3:1, t\u1ea3i tr\u1ecdng cho ph\u00e9p x\u1ea5p x\u1ec9 5.700 lb<\/strong>. T\u0103ng l\u00ean m\u1ed9t \u0111\u01b0\u1eddng k\u00ednh n\u1ebfu t\u1ea3i tr\u1ecdng t\u00ednh to\u00e1n c\u1ed9ng v\u1edbi h\u1ec7 s\u1ed1 an to\u00e0n v\u01b0\u1ee3t qu\u00e1 gi\u00e1 tr\u1ecb n\u00e0y.<\/p>\n

B\u01b0\u1edbc 2: Ch\u1ecdn c\u1ea5p ph\u00f9 h\u1ee3p v\u1edbi \u1ee9ng d\u1ee5ng<\/h3>\n

\u0110\u1eebng m\u1eb7c \u0111\u1ecbnh ch\u1ecdn c\u1ea5p 8 v\u00ec \u201cc\u00e0ng m\u1ea1nh c\u00e0ng t\u1ed1t.\u201d C\u00e1c c\u1ea5p \u0111\u1ed9 cao h\u01a1n th\u01b0\u1eddng gi\u00f2n h\u01a1n v\u00e0 nh\u1ea1y c\u1ea3m v\u1edbi v\u1ebft kh\u00eda \u2014 m\u1ed9t v\u1ebft x\u01b0\u1edbc tr\u00ean ren do tr\u01b0\u1ee3t c\u1edd l\u00ea c\u00f3 th\u1ec3 g\u00e2y ra v\u1ebft n\u1ee9t m\u1ecfi \u1edf c\u1ea5p 8, trong khi ch\u1ec9 l\u00e0m l\u00f5m thanh c\u1ea5p 2. Ch\u1ecdn c\u1ea5p ph\u00f9 h\u1ee3p v\u1edbi t\u1ea3i tr\u1ecdng, kh\u00f4ng ph\u1ea3i c\u1ea5p cao nh\u1ea5t c\u00f3 s\u1eb5n.<\/p>\n

\u0110\u1ed1i v\u1edbi bu l\u00f4ng neo: s\u1eed d\u1ee5ng ASTM F1554 v\u00e0 ch\u1ec9 \u0111\u1ecbnh c\u1ea5p (36, 55 ho\u1eb7c 105) m\u00e0 k\u1ef9 s\u01b0 k\u1ebft c\u1ea5u y\u00eau c\u1ea7u \u2014 kh\u00f4ng th\u1ec3 thay th\u1ebf.<\/p>\n

\u0110\u1ed1i v\u1edbi treo tr\u1ea7n: 3\/8\u2033-16 c\u1ea5p 2 (A307) l\u00e0 ti\u00eau chu\u1ea9n v\u00e0 \u0111\u00e1p \u1ee9ng quy chu\u1ea9n cho t\u1ea3i tr\u1ecdng l\u00ean \u0111\u1ebfn kho\u1ea3ng 140 lb m\u1ed7i thanh v\u1edbi h\u1ec7 s\u1ed1 an to\u00e0n 3:1.<\/p>\n

\u0110\u1ed1i v\u1edbi kh\u1edbp m\u1eb7t b\u00edch ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao: B7 theo ASTM A193 \u2014 kh\u00f4ng thay th\u1ebf.<\/p>\n

B\u01b0\u1edbc 3: Ch\u1ecdn V\u1eadt li\u1ec7u v\u00e0 B\u1ec1 m\u1eb7t ho\u00e0n thi\u1ec7n ph\u00f9 h\u1ee3p v\u1edbi m\u00f4i tr\u01b0\u1eddng<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n
M\u00f4i tr\u01b0\u1eddng<\/th>\nHo\u00e0n thi\u1ec7n \u0111\u1ec1 xu\u1ea5t<\/th>\n<\/tr>\n<\/thead>\n
N\u1ed9i th\u1ea5t kh\u00f4 (h\u1ec7 th\u1ed1ng HVAC, trung t\u00e2m d\u1eef li\u1ec7u)<\/td>\nTh\u00e9p cacbon th\u01b0\u1eddng (A307, F1554)<\/td>\n<\/tr>\n
Ngo\u00e0i tr\u1eddi \/ \u1ea9m \u01b0\u1edbt gi\u00e1n \u0111o\u1ea1n<\/td>\nM\u1ea1 k\u1ebdm nh\u00fang n\u00f3ng (HDG)<\/td>\n<\/tr>\n
V\u00f9ng ven bi\u1ec3n \/ ti\u1ebfp x\u00fac v\u1edbi clorua<\/td>\nTh\u00e9p kh\u00f4ng g\u1ec9 316<\/td>\n<\/tr>\n
Ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m \/ d\u01b0\u1ee3c ph\u1ea9m<\/td>\nTh\u00e9p kh\u00f4ng g\u1ec9 304 ho\u1eb7c 316<\/td>\n<\/tr>\n
Nhi\u1ec7t \u0111\u1ed9 cao (>800\u00b0F)<\/td>\nTh\u00e9p h\u1ee3p kim B7 (kh\u00f4ng ph\u1ee7 l\u1edbp b\u1ea3o v\u1ec7)<\/td>\n<\/tr>\n
Nhi\u1ec7t \u0111\u1ed9 c\u1ef1c th\u1ea5p \/ l\u1ea1nh s\u00e2u<\/td>\nTh\u00e9p h\u1ee3p kim L7<\/td>\n<\/tr>\n
Ti\u1ebfp x\u00fac h\u00f3a ch\u1ea5t \/ axit<\/td>\nHastelloy ho\u1eb7c h\u1ee3p kim \u0111\u1eb7c bi\u1ec7t (li\u00ean h\u1ec7 nh\u00e0 cung c\u1ea5p)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

B\u01b0\u1edbc 4: Ki\u1ec3m tra kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch ren<\/h3>\n

Thanh ren ch\u1ec9 h\u1eefu \u00edch khi \u0111i k\u00e8m v\u1edbi \u0111ai \u1ed1c ph\u00f9 h\u1ee3p. X\u00e1c nh\u1eadn:
\n– Ki\u1ec3u ren ph\u00f9 h\u1ee3p<\/strong>: Thanh ren UNC v\u1edbi \u0111ai \u1ed1c UNC; thanh ren h\u1ec7 m\u00e9t v\u1edbi \u0111ai \u1ed1c h\u1ec7 m\u00e9t.
\n– Ph\u00f9 h\u1ee3p c\u1ea5p \u0111\u1ed9<\/strong>: C\u1ea5p \u0111\u1ed9 \u0111ai \u1ed1c ph\u1ea3i b\u1eb1ng ho\u1eb7c cao h\u01a1n c\u1ea5p \u0111\u1ed9 thanh ren. Thanh ren B7 k\u1ebft h\u1ee3p v\u1edbi \u0111ai \u1ed1c l\u1ee5c gi\u00e1c n\u1eb7ng 2H (ASTM A194). Thanh ren F1554 Gr.105 k\u1ebft h\u1ee3p v\u1edbi \u0111ai \u1ed1c l\u1ee5c gi\u00e1c n\u1eb7ng c\u1ea5p C ho\u1eb7c 2H.
\n– Ph\u00f9 h\u1ee3p l\u1edbp ph\u1ee7<\/strong>: Thanh ren m\u1ea1 k\u1ebdm nh\u00fang n\u00f3ng (HDG) y\u00eau c\u1ea7u s\u1eed d\u1ee5ng \u0111ai \u1ed1c m\u1ea1 k\u1ebdm nh\u00fang n\u00f3ng ho\u1eb7c \u0111ai \u1ed1c qu\u00e1 kh\u1ed5. Kh\u00f4ng n\u00ean c\u1ed1 v\u1eb7n \u0111ai \u1ed1c ti\u00eau chu\u1ea9n v\u00e0o thanh ren m\u1ea1 k\u1ebdm \u2014 l\u1edbp k\u1ebdm tr\u00ean ren s\u1ebd l\u00e0m k\u1eb9t ho\u1eb7c tu\u00f4n ren.<\/p>\n

Nh\u1eefng l\u1ed7i ph\u1ed5 bi\u1ebfn c\u1ea7n tr\u00e1nh<\/h3>\n

Ch\u1ec9 \u0111\u1ecbnh sai c\u1ea5p \u0111\u1ed9 bu l\u00f4ng neo<\/strong>: F1554 Gr.36 kh\u00f4ng th\u1ec3 thay th\u1ebf cho F1554 Gr.105. S\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 gi\u1edbi h\u1ea1n ch\u1ea3y g\u1ea7n nh\u01b0 3:1. S\u1eed d\u1ee5ng Gr.36 khi y\u00eau c\u1ea7u Gr.105 c\u00f3 th\u1ec3 khi\u1ebfn bu l\u00f4ng neo b\u1ecb ch\u1ea3y tr\u01b0\u1edbc khi \u0111\u1ea1t t\u1ea3i tr\u1ecdng thi\u1ebft k\u1ebf.<\/p>\n

Tr\u1ed9n l\u1eabn ti\u00eau chu\u1ea9n ren<\/strong>: \u0110ai \u1ed1c l\u1ee5c gi\u00e1c 1\/2\u2033-13 UNC tr\u00ean thanh ren M12 t\u01b0\u1edfng nh\u01b0 ph\u00f9 h\u1ee3p cho \u0111\u1ebfn khi b\u1ecb ch\u00e9o ren v\u00e0 l\u00e0m h\u1ecfng c\u1ea3 hai b\u1ed9 ph\u1eadn. Lu\u00f4n ki\u1ec3m tra th\u1ebb ren v\u1edbi th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a thanh ren.<\/p>\n

S\u1eed d\u1ee5ng th\u00e9p th\u01b0\u1eddng trong m\u00f4i tr\u01b0\u1eddng \u1ea9m \u01b0\u1edbt<\/strong>: G\u1ec9 s\u00e9t kh\u00f4ng ch\u1ec9 l\u00e0 v\u1ea5n \u0111\u1ec1 th\u1ea9m m\u1ef9. Trong c\u00e1c \u1ee9ng d\u1ee5ng tr\u1ea7n treo, v\u1ec7t g\u1ec9 cho th\u1ea5y s\u1ef1 \u0103n m\u00f2n \u0111ang di\u1ec5n ra, l\u00e0m gi\u1ea3m ti\u1ebft di\u1ec7n v\u00e0 tu\u1ed5i th\u1ecd m\u1ecfi. Khi g\u1ec9 \u0111\u00e3 xu\u1ea5t hi\u1ec7n tr\u00ean b\u1ec1 m\u1eb7t, kim lo\u1ea1i n\u1ec1n \u0111\u00e3 b\u1ecb suy gi\u1ea3m.<\/p>\n

C\u1eaft m\u00e0 kh\u00f4ng v\u00e1t m\u00e9p<\/strong>: Thanh ren c\u1eaft t\u1ea1i c\u00f4ng tr\u01b0\u1eddng c\u1ea7n \u0111\u01b0\u1ee3c v\u00e1t m\u00e9p (v\u00e1t c\u1ea1nh) \u0111\u1ea7u c\u1eaft tr\u01b0\u1edbc khi v\u1eb7n \u0111ai \u1ed1c. \u0110\u1ea7u c\u1eaft kh\u00f4ng v\u00e1t \u0111\u1ec3 l\u1ea1i ba via c\u00f3 th\u1ec3 l\u00e0m ch\u00e9o ren ho\u1eb7c khi\u1ebfn \u0111ai \u1ed1c b\u1ecb k\u1eb9t khi v\u1eb7n xu\u1ed1ng thanh ren.<\/p>\n

\n

Xu h\u01b0\u1edbng t\u01b0\u01a1ng lai trong c\u00f4ng ngh\u1ec7 thanh ren (2026+)<\/h2>\n

L\u1edbp ph\u1ee7 ch\u1ed1ng \u0103n m\u00f2n ti\u00ean ti\u1ebfn<\/h3>\n

Th\u1ecb tr\u01b0\u1eddng m\u1ea1 k\u1ebdm \u0111ang ph\u00e1t tri\u1ec3n. Trong khi m\u1ea1 k\u1ebdm nh\u00fang n\u00f3ng v\u1eabn l\u00e0 ti\u00eau chu\u1ea9n v\u1ec1 chi ph\u00ed-hi\u1ec7u su\u1ea5t, m\u1ea1 k\u1ebdm c\u01a1 h\u1ecdc<\/strong> (l\u1edbp ph\u1ee7 k\u1ebdm ngu\u1ed9i b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p quay) \u0111ang d\u1ea7n ph\u1ed5 bi\u1ebfn cho c\u00e1c thanh ren \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf, n\u01a1i quy tr\u00ecnh HDG g\u00e2y ra v\u1ea5n \u0111\u1ec1 v\u1ec1 k\u00edch th\u01b0\u1edbc. M\u1ea1 k\u1ebdm c\u01a1 h\u1ecdc t\u1ea1o ra l\u1edbp ph\u1ee7 \u0111\u1ed3ng \u0111\u1ec1u h\u01a1n \u2014 r\u1ea5t quan tr\u1ecdng cho c\u00e1c c\u1ee5m l\u1eafp r\u00e1p y\u00eau c\u1ea7u khe h\u1edf ch\u1eb7t gi\u1eefa \u0111ai \u1ed1c v\u00e0 thanh ren.<\/p>\n

L\u1edbp ph\u1ee7 Dacromet v\u00e0 geomet<\/strong> (h\u1ec7 th\u1ed1ng ph\u1ee7 v\u1ea3y k\u1ebdm) \u0111ang ph\u00e1t tri\u1ec3n trong c\u00e1c \u1ee9ng d\u1ee5ng \u00f4 t\u00f4 v\u00e0 h\u1ea1 t\u1ea7ng ngo\u00e0i tr\u1eddi, mang l\u1ea1i kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n t\u01b0\u01a1ng \u0111\u01b0\u01a1ng HDG nh\u01b0ng v\u1edbi \u0111\u1ed9 d\u00e0y l\u1edbp ph\u1ee7 nh\u1ecf h\u01a1n nhi\u1ec1u. C\u00e1c l\u1edbp ph\u1ee7 n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh s\u1eed d\u1ee5ng cho bu l\u00f4ng neo tr\u1ee5 \u0111i\u1ec7n gi\u00f3 v\u00e0 s\u1ebd m\u1edf r\u1ed9ng sang l\u0129nh v\u1ef1c x\u00e2y d\u1ef1ng khi c\u00e1c k\u1ef9 s\u01b0 k\u1ebft c\u1ea5u v\u00e0 ki\u1ec3m \u0111\u1ecbnh vi\u00ean quen thu\u1ed9c h\u01a1n v\u1edbi d\u1eef li\u1ec7u th\u1eed nghi\u1ec7m.<\/p>\n

C\u1ea5p \u0111\u1ed9 th\u00e9p h\u1ee3p kim th\u1ea5p c\u01b0\u1eddng \u0111\u1ed9 cao (HSLA)<\/h3>\n

Ng\u00e0nh c\u00f4ng nghi\u1ec7p th\u00e9p k\u1ebft c\u1ea5u \u0111ang th\u00fac \u0111\u1ea9y s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 cao h\u01a1n, t\u1ea1o ra nhu c\u1ea7u cho Thanh ren F1554 Gr.105 v\u00e0 B7 \u0111\u01b0\u1eddng k\u00ednh l\u1edbn<\/strong> \u2014 2\u2033 tr\u1edf l\u00ean \u2014 d\u00f9ng cho \u0111\u1ebf c\u1ed9t nh\u00e0 cao t\u1ea7ng v\u00e0 bu l\u00f4ng neo thi\u1ebft b\u1ecb n\u1eb7ng. Vi\u1ec7c s\u1ea3n xu\u1ea5t thanh B7 \u0111\u01b0\u1eddng k\u00ednh 4\u2033 v\u1edbi t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc \u0111\u1ed3ng \u0111\u1ec1u tr\u00ean to\u00e0n ti\u1ebft di\u1ec7n \u0111\u00f2i h\u1ecfi ki\u1ec3m so\u00e1t nhi\u1ec7t luy\u1ec7n ch\u1eb7t ch\u1ebd; c\u00e1c ti\u00eau chu\u1ea9n x\u00e2y d\u1ef1ng c\u1ee7a OSHA ng\u00e0y c\u00e0ng y\u00eau c\u1ea7u b\u00e1o c\u00e1o th\u1eed nghi\u1ec7m nh\u00e0 m\u00e1y (MTR) \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn cho t\u1ea5t c\u1ea3 c\u00e1c th\u00e0nh ph\u1ea7n bu l\u00f4ng neo quan tr\u1ecdng, \u0111i\u1ec1u n\u00e0y th\u00fac \u0111\u1ea9y \u0111\u1ea7u t\u01b0 v\u00e0o ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n xu\u1ea5t thanh ren.<\/p>\n

Kh\u1ea3 n\u0103ng truy xu\u1ea5t k\u1ef9 thu\u1eadt s\u1ed1<\/h3>\n

Bu l\u00f4ng neo \u0111\u01b0\u1ee3c ch\u00f4n trong b\u00ea t\u00f4ng s\u1ebd kh\u00f4ng th\u1ec3 ti\u1ebfp c\u1eadn sau khi x\u00e2y d\u1ef1ng \u2014 n\u1ebfu c\u00f3 nghi ng\u1edd v\u1ec1 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u1eadt li\u1ec7u sau nhi\u1ec1u n\u0103m, kh\u00f4ng c\u00f3 c\u00e1ch n\u00e0o l\u1ea5y m\u1eabu ho\u1eb7c ki\u1ec3m tra m\u00e0 kh\u00f4ng ph\u00e1 h\u1ee7y k\u1ebft c\u1ea5u. Ng\u00e0nh c\u00f4ng nghi\u1ec7p \u0111ang chuy\u1ec3n sang G\u00f3i bu l\u00f4ng neo g\u1eafn m\u00e3 QR<\/strong> li\u00ean k\u1ebft tr\u1edf l\u1ea1i v\u1edbi b\u00e1o c\u00e1o th\u1eed nghi\u1ec7m nh\u00e0 m\u00e1y k\u1ef9 thu\u1eadt s\u1ed1, s\u1ed1 nhi\u1ec7t luy\u1ec7n v\u00e0 h\u1ed3 s\u01a1 ki\u1ec3m tra. D\u1ef1 ki\u1ebfn \u0111i\u1ec1u n\u00e0y s\u1ebd tr\u1edf th\u00e0nh y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt cho c\u00e1c d\u1ef1 \u00e1n h\u1ea1 t\u1ea7ng c\u00f4ng c\u1ed9ng quan tr\u1ecdng trong v\u00f2ng 3\u20135 n\u0103m t\u1edbi.<\/p>\n

Nhu c\u1ea7u th\u00e9p kh\u00f4ng g\u1ec9 trong \u0111\u1ed5i m\u1edbi h\u1ea1 t\u1ea7ng<\/h3>\n

Khi c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng c\u0169 \u0111\u01b0\u1ee3c thay th\u1ebf \u2014 \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u1ea7u ven bi\u1ec3n, h\u1ec7 th\u1ed1ng neo t\u01b0\u1eddng ch\u1eafn s\u00f3ng v\u00e0 nh\u00e0 m\u00e1y x\u1eed l\u00fd n\u01b0\u1edbc \u2014 c\u00e1c k\u1ef9 s\u01b0 \u0111ang ch\u1ec9 \u0111\u1ecbnh s\u1eed d\u1ee5ng thanh ren th\u00e9p kh\u00f4ng g\u1ec9 316L thay cho th\u00e9p th\u01b0\u1eddng (hi\u1ec7n \u0111\u00e3 b\u1ecb \u0103n m\u00f2n kh\u00f4ng c\u00f2n s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c). Gi\u00e1 th\u00e0nh cao h\u01a1n \u0111\u00e1ng k\u1ec3, nh\u01b0ng ph\u00e2n t\u00edch chi ph\u00ed v\u00f2ng \u0111\u1eddi lu\u00f4n \u01b0u ti\u00ean th\u00e9p kh\u00f4ng g\u1ec9 trong m\u00f4i tr\u01b0\u1eddng c\u00f3 clo khi t\u00ednh c\u1ea3 chi ph\u00ed thay th\u1ebf nh\u00e2n c\u00f4ng cho c\u00e1c ch\u1ed1t kh\u00f4ng th\u1ec3 ti\u1ebfp c\u1eadn. Th\u1ecb tr\u01b0\u1eddng ch\u1ed1t th\u00e9p kh\u00f4ng g\u1ec9 to\u00e0n c\u1ea7u d\u1ef1 ki\u1ebfn s\u1ebd ti\u1ebfp t\u1ee5c t\u0103ng tr\u01b0\u1edfng \u1ed5n \u0111\u1ecbnh \u0111\u1ebfn n\u0103m 2030, ch\u1ee7 y\u1ebfu nh\u1edd \u0111\u1ed5i m\u1edbi h\u1ea1 t\u1ea7ng t\u1ea1i Vi\u1ec7t Nam v\u00e0 c\u00e1c n\u01b0\u1edbc kh\u00e1c.<\/p>\n

\n

C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n

Thanh ren d\u00f9ng \u0111\u1ec3 l\u00e0m g\u00ec?<\/strong>
\nThanh ren \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 m\u1ed9t ch\u1ed1t li\u00ean k\u1ebft, bu l\u00f4ng neo ho\u1eb7c thanh ch\u1ecbu l\u1ef1c k\u00e9o trong c\u00e1c k\u1ebft n\u1ed1i c\u1ea7n \u0111i\u1ec1u ch\u1ec9nh chi\u1ec1u d\u00e0i ho\u1eb7c ti\u1ebfp c\u1eadn hai \u0111\u1ea7u. \u1ee8ng d\u1ee5ng ph\u1ed5 bi\u1ebfn bao g\u1ed3m treo h\u1ec7 th\u1ed1ng tr\u1ea7n, neo c\u1ed9t th\u00e9p k\u1ebft c\u1ea5u v\u00e0o m\u00f3ng b\u00ea t\u00f4ng, n\u1ed1i \u1ed1ng m\u1eb7t b\u00edch, \u0111\u1ee1 m\u00e1ng c\u00e1p v\u00e0 c\u00e2n ch\u1ec9nh thi\u1ebft b\u1ecb c\u00f4ng nghi\u1ec7p.<\/p>\n

S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa thanh ren v\u00e0 thanh ren tr\u00f2n l\u00e0 g\u00ec?<\/strong>
\n\u0110\u00e2y l\u00e0 c\u00f9ng m\u1ed9t s\u1ea3n ph\u1ea9m \u2014 hai thu\u1eadt ng\u1eef n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng thay th\u1ebf cho nhau. \u201cThanh ren tr\u00f2n\u201d ph\u1ed5 bi\u1ebfn h\u01a1n t\u1ea1i Vi\u1ec7t Nam; \u201cthanh ren\u201d ph\u1ed5 bi\u1ebfn \u1edf c\u00e1c n\u01b0\u1edbc kh\u00e1c. C\u1ea3 hai \u0111\u1ec1u ch\u1ec9 lo\u1ea1i ch\u1ed1t ren to\u00e0n b\u1ed9, kh\u00f4ng c\u00f3 \u0111\u1ea7u ho\u1eb7c \u0111o\u1ea1n tr\u01a1n.<\/p>\n

Thanh ren c\u00f3 m\u1ea1nh nh\u01b0 th\u00e9p g\u00e2n kh\u00f4ng?<\/strong>
\nKh\u00f4ng th\u1ec3 so s\u00e1nh tr\u1ef1c ti\u1ebfp \u2014 ch\u00fang \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho m\u1ee5c \u0111\u00edch kh\u00e1c nhau. Thanh ren F1554 Gr.105 \u0111\u01b0\u1eddng k\u00ednh 1\/2\u2033 c\u00f3 gi\u1edbi h\u1ea1n b\u1ec1n k\u00e9o t\u1ed1i thi\u1ec3u kho\u1ea3ng 125 ksi, cao h\u01a1n th\u00e9p g\u00e2n A615 Gr.60 (t\u1ed1i thi\u1ec3u 90 ksi). Tuy nhi\u00ean, \u0111\u1ed9 b\u1ec1n c\u1ee7a th\u00e9p g\u00e2n trong b\u00ea t\u00f4ng \u0111\u1ebfn t\u1eeb di\u1ec7n t\u00edch b\u00e1m d\u00ednh, kh\u00f4ng ch\u1ec9 l\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu k\u00e9o, v\u00e0 thanh ren kh\u00f4ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 b\u00e1m d\u00ednh v\u1edbi b\u00ea t\u00f4ng. Vi\u1ec7c s\u1eed d\u1ee5ng thanh ren thay cho th\u00e9p g\u00e2n \u2014 ho\u1eb7c ng\u01b0\u1ee3c l\u1ea1i \u2014 c\u1ea7n c\u00f3 s\u1ef1 ph\u00ea duy\u1ec7t c\u1ee7a k\u1ef9 s\u01b0.<\/p>\n

Th\u00e9p g\u00e2n ren l\u00e0 g\u00ec?<\/strong>
\nTh\u00e9p g\u00e2n ren l\u00e0 lo\u1ea1i th\u00e9p c\u1ed1t b\u00ea t\u00f4ng \u0111\u01b0\u1ee3c ti\u1ec7n ho\u1eb7c c\u00e1n ren ti\u00eau chu\u1ea9n \u1edf hai \u0111\u1ea7u \u0111\u1ec3 s\u1eed d\u1ee5ng v\u1edbi h\u1ec7 th\u1ed1ng n\u1ed1i c\u01a1 kh\u00ed. \u0110\u00e2y l\u00e0 s\u1ea3n ph\u1ea9m th\u00e9p g\u00e2n, kh\u00f4ng ph\u1ea3i thanh ren. Ren cho ph\u00e9p n\u1ed1i c\u00e1c \u0111o\u1ea1n th\u00e9p g\u00e2n \u0111\u1ea7u-\u0111\u1ea7u b\u1eb1ng \u1ed1ng n\u1ed1i ren, lo\u1ea1i b\u1ecf nhu c\u1ea7u n\u1ed1i ch\u1ed3ng trong c\u00e1c khu v\u1ef1c c\u1ed1t th\u00e9p d\u00e0y \u0111\u1eb7c.<\/p>\n

B\u01b0\u1edbc ren ti\u00eau chu\u1ea9n c\u1ee7a thanh ren l\u00e0 g\u00ec?<\/strong>
\nT\u1ea1i Vi\u1ec7t Nam, UNC (Unified National Coarse) l\u00e0 ti\u00eau chu\u1ea9n m\u1eb7c \u0111\u1ecbnh. C\u00e1c k\u00edch th\u01b0\u1edbc v\u00e0 b\u01b0\u1edbc ren ph\u1ed5 bi\u1ebfn: 3\/8\u2033-16 (16 ren\/inch), 1\/2\u2033-13, 5\/8\u2033-11, 3\/4\u2033-10, 1\u2033-8. T\u01b0\u01a1ng \u0111\u01b0\u01a1ng h\u1ec7 m\u00e9t: M10\u00d71.5, M12\u00d71.75, M16\u00d72, M20\u00d72.5. Lu\u00f4n x\u00e1c nh\u1eadn th\u00f4ng s\u1ed1 b\u01b0\u1edbc ren tr\u01b0\u1edbc khi \u0111\u1eb7t h\u00e0ng, v\u00ec thanh ren UNF (ren m\u1ecbn) nh\u00ecn gi\u1ed1ng h\u1ec7t UNC.<\/p>\n

Thanh ren c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1eaft t\u1ea1i c\u00f4ng tr\u01b0\u1eddng d\u00e0i bao nhi\u00eau?<\/strong>
\nKh\u00f4ng c\u00f3 quy \u0111\u1ecbnh gi\u1edbi h\u1ea1n chi\u1ec1u d\u00e0i c\u1eaft t\u1ea1i c\u00f4ng tr\u01b0\u1eddng, nh\u01b0ng c\u00e1c y\u1ebfu t\u1ed1 k\u1ebft c\u1ea5u s\u1ebd gi\u1edbi h\u1ea1n chi\u1ec1u d\u00e0i s\u1eed d\u1ee5ng th\u1ef1c t\u1ebf. Thanh ren kh\u00f4ng \u0111\u01b0\u1ee3c gi\u1eb1ng ch\u1ecbu n\u00e9n s\u1ebd b\u1ecb u\u1ed1n cong \u1edf chi\u1ec1u d\u00e0i ng\u1eafn h\u01a1n nhi\u1ec1u so v\u1edbi kh\u1ea3 n\u0103ng ch\u1ecbu k\u00e9o. Thanh ren 1\/2\u2033 d\u00f9ng treo c\u00f3 chi\u1ec1u d\u00e0i t\u1ed1i \u0111a khuy\u1ebfn ngh\u1ecb kh\u00f4ng gi\u1eb1ng kho\u1ea3ng 1,8 m\u00e9t tr\u01b0\u1edbc khi v\u1ea5n \u0111\u1ec1 m\u1ea3nh d\u1ebb tr\u1edf n\u00ean \u0111\u00e1ng lo ng\u1ea1i. C\u00e1c nh\u1ecbp d\u00e0i h\u01a1n c\u1ea7n c\u00f3 gi\u1eb1ng ngang ho\u1eb7c s\u1eed d\u1ee5ng thanh \u0111\u01b0\u1eddng k\u00ednh l\u1edbn h\u01a1n.<\/p>\n

N\u00ean s\u1eed d\u1ee5ng lo\u1ea1i \u0111ai \u1ed1c n\u00e0o v\u1edbi thanh ren B7?<\/strong>
\n\u0110ai \u1ed1c l\u1ee5c gi\u00e1c n\u1eb7ng ASTM A194 Grade 2H l\u00e0 l\u1ef1a ch\u1ecdn ti\u00eau chu\u1ea9n cho thanh ren B7 trong c\u00e1c \u1ee9ng d\u1ee5ng gi\u1eef \u00e1p su\u1ea5t. K\u00fd hi\u1ec7u 2H \u0111\u1ea3m b\u1ea3o t\u1ea3i ch\u1ee9ng minh c\u1ee7a \u0111ai \u1ed1c v\u01b0\u1ee3t qu\u00e1 s\u1ee9c k\u00e9o c\u1ee7a thanh B7 \u2014 thanh s\u1ebd b\u1ecb ch\u1ea3y tr\u01b0\u1edbc khi \u0111ai \u1ed1c b\u1ecb tu\u1ed1t ren. Vi\u1ec7c s\u1eed d\u1ee5ng \u0111ai \u1ed1c ti\u00eau chu\u1ea9n A563 Grade A tr\u00ean thanh B7 l\u00e0 vi ph\u1ea1m quy chu\u1ea9n trong c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u01b0\u1eddng \u1ed1ng \u00e1p su\u1ea5t.<\/p>\n

\"Thanh<\/p>\n

\n

K\u1ebft lu\u1eadn<\/h2>\n

Thanh ren t\u01b0\u1edfng ch\u1eebng \u0111\u01a1n gi\u1ea3n \u2014 ch\u1ec9 l\u00e0 m\u1ed9t thanh c\u00f3 ren \u2014 nh\u01b0ng c\u00e1c bi\u1ebfn s\u1ed1 l\u1ef1a ch\u1ecdn quy\u1ebft \u0111\u1ecbnh t\u00ednh an to\u00e0n bao g\u1ed3m h\u00f3a h\u1ecdc v\u1eadt li\u1ec7u, k\u00fd hi\u1ec7u c\u1ea5p, h\u00ecnh h\u1ecdc ren v\u00e0 m\u00f4i tr\u01b0\u1eddng ti\u1ebfp x\u00fac. C\u00e1c trang b\u00e1n l\u1ebb chi\u1ebfm \u01b0u th\u1ebf tr\u00ean trang \u0111\u1ea7u Google cho t\u1eeb kh\u00f3a n\u00e0y s\u1ebd b\u00e1n cho b\u1ea1n b\u1ea5t k\u1ef3 thanh ren n\u00e0o b\u1ea1n nh\u1ea5p v\u00e0o; h\u1ecd s\u1ebd kh\u00f4ng n\u00f3i r\u1eb1ng B7 v\u00e0 A307 kh\u00f4ng th\u1ec3 thay th\u1ebf cho nhau, ho\u1eb7c r\u1eb1ng thanh HDG c\u1ea7n \u0111ai \u1ed1c HDG ph\u00f9 h\u1ee3p, ho\u1eb7c r\u1eb1ng F1554 Gr.36 v\u00e0 Gr.105 t\u1ed3n t\u1ea1i cho c\u00e1c y\u00eau c\u1ea7u k\u1ebft c\u1ea5u ho\u00e0n to\u00e0n kh\u00e1c nhau.<\/p>\n

B\u01b0\u1edbc th\u1ef1c t\u1ebf ti\u1ebfp theo: x\u00e1c \u0111\u1ecbnh m\u00f4i tr\u01b0\u1eddng \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n (trong nh\u00e0\/ngo\u00e0i tr\u1eddi\/h\u00f3a ch\u1ea5t\/nhi\u1ec7t \u0111\u1ed9 cao), x\u00e1c \u0111\u1ecbnh t\u1ea3i k\u00e9o y\u00eau c\u1ea7u v\u00e0 \u00e1p d\u1ee5ng h\u1ec7 s\u1ed1 an to\u00e0n ph\u00f9 h\u1ee3p v\u1edbi quy chu\u1ea9n, ch\u1ecdn c\u1ea5p ph\u00f9 h\u1ee3p v\u1edbi t\u1ea3i \u0111\u00f3, v\u00e0 x\u00e1c nh\u1eadn s\u1ef1 t\u01b0\u01a1ng th\u00edch c\u1ee7a ren v\u1edbi ph\u1ea7n c\u1ee9ng gh\u00e9p n\u1ed1i. \u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng bu l\u00f4ng neo k\u1ebft c\u1ea5u \u2014 ch\u00e2n c\u1ed9t, khung thi\u1ebft b\u1ecb, b\u1ea5t k\u1ef3 \u0111\u01b0\u1eddng truy\u1ec1n t\u1ea3i n\u00e0o t\u1eeb th\u00e9p sang b\u00ea t\u00f4ng \u2014 h\u00e3y l\u1ea5y th\u00f4ng s\u1ed1 tr\u1ef1c ti\u1ebfp t\u1eeb b\u1ea3n v\u1ebd c\u1ee7a k\u1ef9 s\u01b0 k\u1ebft c\u1ea5u. C\u00e1c y\u00eau c\u1ea7u v\u1ec1 c\u1ea5p F1554 v\u00e0 \u0111\u1ed9 s\u00e2u ch\u00f4n \u0111\u1ec1u kh\u00f4ng ph\u1ea3i l\u00e0 g\u1ee3i \u00fd.<\/p>\n

\u0110\u1ed1i v\u1edbi c\u00e1c c\u00e2u h\u1ecfi v\u1ec1 ngu\u1ed3n cung v\u00e0 k\u1ef9 thu\u1eadt li\u00ean quan \u0111\u1ebfn c\u1ea5p v\u00e0 k\u00edch th\u01b0\u1edbc c\u1ee5 th\u1ec3, productionscrews.com<\/a> cung c\u1ea5p thanh ren \u0111\u1ea7y \u0111\u1ee7 c\u00e1c c\u1ea5p v\u1edbi b\u00e1o c\u00e1o ki\u1ec3m tra nh\u00e0 m\u00e1y \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn theo y\u00eau c\u1ea7u.<\/p>\n

\n

Ngu\u1ed3n tham kh\u1ea3o trong b\u00e0i vi\u1ebft n\u00e0y:<\/em>
\n– Thanh ren \u2014 Wikipedia<\/a>
\n\u2013 ASTM Qu\u1ed1c t\u1ebf: ASTM F1554 (Bu l\u00f4ng neo), ASTM A193 (Bu l\u00f4ng h\u1ee3p kim B7), ASTM A307 (Bu l\u00f4ng th\u00e9p cacbon)
\n\u2013 ASME B1.1 \u2014 Ti\u00eau chu\u1ea9n ren v\u00edt inch th\u1ed1ng nh\u1ea5t<\/p>","protected":false},"excerpt":{"rendered":"

H\u01b0\u1edbng d\u1eabn \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 thanh ren \u2014 bao g\u1ed3m c\u00e1c lo\u1ea1i thanh ren to\u00e0n b\u1ed9, c\u00e1c c\u1ea5p ASTM (A307, F1554, B7), v\u1eadt li\u1ec7u (th\u00e9p kh\u00f4ng g\u1ec9, m\u1ea1 k\u1ebdm, th\u00e9p cacbon), kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i v\u00e0 l\u1ef1a ch\u1ecdn theo \u1ee9ng d\u1ee5ng cho x\u00e2y d\u1ef1ng, c\u00f4ng nghi\u1ec7p v\u00e0 li\u00ean k\u1ebft c\u01a1 kh\u00ed.<\/p>","protected":false},"author":1,"featured_media":3686,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3690","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-screws-flange-tutorial"],"_links":{"self":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts\/3690","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/comments?post=3690"}],"version-history":[{"count":1,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts\/3690\/revisions"}],"predecessor-version":[{"id":3691,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts\/3690\/revisions\/3691"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/media\/3686"}],"wp:attachment":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/media?parent=3690"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/categories?post=3690"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/tags?post=3690"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}