{"id":3718,"date":"2018-06-13T13:35:04","date_gmt":"2018-06-13T05:35:04","guid":{"rendered":"http:\/\/www.bundytubes.com\/?p=3718"},"modified":"2026-04-17T22:23:12","modified_gmt":"2026-04-17T14:23:12","slug":"gm-material-specification-ems-99-steel-tubing-copper-brazed","status":"publish","type":"post","link":"https:\/\/www.bundytubes.com\/vi\/gm-material-specification-ems-99-steel-tubing-copper-brazed\/","title":{"rendered":"Th\u00f4ng s\u1ed1 v\u1eadt li\u1ec7u GM: EMS-99 \u1ed0ng th\u00e9p \u2013 H\u00e0n \u0111\u1ed3ng"},"content":{"rendered":"\n

1. Th\u1ef1c h\u00e0nh ti\u00eau chu\u1ea9n &: Tu\u00e2n th\u1ee7 \u0111\u1ea7y \u0111\u1ee7 m\u1ecdi y\u00eau c\u1ea7u c\u1ee7a ASTM A254<\/p>\n\n\n\n

2. \u0110\u1ed9 c\u1ee9ng: (T\u1ea1i m\u1eb7t trong, vu\u00f4ng g\u00f3c 90 \u0111\u1ed9 v\u1edbi \u0111\u01b0\u1eddng h\u00e0n) Rockwell 30T t\u1ed1i \u0111a 55.<\/p>\n\n\n\n

3. Th\u1eed nghi\u1ec7m u\u1ed1n d\u1eb9t &: M\u1ed9t \u0111o\u1ea1n \u1ed1ng d\u00e0i t\u1ed1i thi\u1ec3u 2-1\/2″ ph\u1ea3i ch\u1ecbu \u0111\u01b0\u1ee3c vi\u1ec7c \u00e9p d\u1eb9t gi\u1eefa hai t\u1ea5m ph\u1eb3ng song song cho \u0111\u1ebfn khi hai th\u00e0nh trong c\u1ee7a \u1ed1ng ti\u1ebfp x\u00fac nhau. \u0110o\u1ea1n \u0111\u00e3 \u00e9p d\u1eb9t sau \u0111\u00f3 \u0111\u01b0\u1ee3c u\u1ed1n m\u1ed9t l\u1ea7n qua g\u00f3c 90 \u0111\u1ed9 quanh ch\u1ed1t c\u00f3 \u0111\u01b0\u1eddng k\u00ednh b\u1eb1ng ba l\u1ea7n chi\u1ec1u d\u00e0y th\u00e0nh \u1ed1ng, r\u1ed3i \u0111\u01b0\u1ee3c du\u1ed7i th\u1eb3ng m\u1ed9t l\u1ea7n m\u00e0 kh\u00f4ng n\u1ee9t ho\u1eb7c xu\u1ea5t hi\u1ec7n khuy\u1ebft t\u1eadt.<\/p>\n\n\n\n

4. \u0110\u1ed9 sai l\u1ec7ch cho ph\u00e9p:<\/p>\n\n\n\n

 OD<\/strong><\/td>Bi\u1ebfn thi\u00ean cho ph\u00e9p<\/strong><\/td><\/tr>
C\u1ed9ng<\/td>\u00c2m<\/td><\/tr>
3\/16″<\/td>.002″<\/td>.002″<\/td><\/tr>
1\/4″ & Tr\u1edf l\u00ean<\/td>.002″<\/td>.003″<\/td><\/tr>
\u0110\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng1<\/sup><\/td>.002″<\/td>.003″<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

1<\/sup>D\u00e0nh cho \u1ed1ng c\u00f3 \u0111\u1ed9 d\u00e0y th\u00e0nh t\u1eeb 0,020″ \u0111\u1ebfn 0,049″.<\/p>\n\n\n\n

5. Th\u1eed nghi\u1ec7m \u00e1p l\u1ef1c th\u1ee7y t\u0129nh: Ph\u1ea3i ch\u1ecbu \u0111\u01b0\u1ee3c, kh\u00f4ng r\u00f2 r\u1ec9, \u00e1p l\u1ef1c th\u1ee7y t\u0129nh b\u00ean trong \u0111\u1ee7 \u0111\u1ec3 t\u1ea1o ra \u1ee9ng su\u1ea5t k\u00e9o t\u1ed1i thi\u1ec3u tr\u00ean v\u1eadt li\u1ec7u l\u00e0 16000 psi. \u00c1p l\u1ef1c th\u1ee7y t\u0129nh \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh theo ph\u01b0\u01a1ng tr\u00ecnh sau:<\/p>\n\n\n\n

P = 2St\/D<\/p>\n\n\n\n

\u1ede \u0111\u00e2u<\/p>\n\n\n\n

P = \u00e1p su\u1ea5t th\u1ee7y t\u0129nh t\u00ednh b\u1eb1ng psi
S = \u1ee9ng su\u1ea5t k\u00e9o cho ph\u00e9p, 16000 psi
t =  \u0111\u1ed9 d\u00e0y th\u00e0nh \u1ed1ng t\u00ednh b\u1eb1ng inch
D = \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i c\u1ee7a \u1ed1ng t\u00ednh b\u1eb1ng inch.<\/p>\n