很遗憾,因您的浏览器版本过低导致无法获得最佳浏览体验,推荐下载安装谷歌浏览器!
对焊管件热处理的目的是什么?
对焊管件热处理目的消除成形过程产生的加工硬化、残余应力、金属变形缺陷等,使成
形后管件的金属组织、性能发生变化,恢复到变形加工前的状态或使其性能得到改善和
提高。
对焊管件尺寸公差 ( Tolerances For Butt-welding Fittings )
公称直径 Nominal Diameter | 坡口处外径 O.D.For Bevel End | 端部内径 I.D.For End | 壁厚 Wall Thickness | 90o、45o弯头 Elbow | 三通 Tee | 异径管 Reducer | 管帽 Cap | 180o弯头 Elbow | |||||
DN | NPS | A | B | C | M | H | E | O | K | 不平度 | |||
15-65 | 1/2-2.1/2 | +1.6 -0.8 | ±0.8 | -12.5% | ±1.6 | ±1.6 | ±1.6 | ±1.6 | ±1.6 | ±3.2 | ±6.4 | ±6.4 | ±0.8 |
80-100 | 3-4 | ±1.6 | ±1.6 | ||||||||||
125-200 | 5-8 | +2.4 -1.6 | ±6.4 | ||||||||||
250-450 | 10-18 | +4.0 -3.2 | ±3.2 | ±2.4 | ±2.4 | ±2.4 | ±2.4 | ±2.4 | ±9.6 | ||||
500-600 | 20-24 | +6.4 -4.8 | ±4.8 | ±3.2 | ±3.2 | ±3.2 | ±3.2 | ±4.8 | ±9.6 | ||||
650-750 | 26-30 | ||||||||||||
800-1200 | 32-48 | ±4.8 | ±4.8 | ±4.8 | ±4.8 | ||||||||
1250-1500 | 50-60 | +9.6 -6.4 | ±6.4 | ±9.6 | ±9.6 | ±9.6 | ±9.6 | ±9.6 | |||||
1550-1750 | 62-70 | +12.7 -9.6 | ±9.6 | ±12.7 | ±12.7 | ||||||||
1800-2000 | 72-80 | +16 -12 | ±12 | ±16 | ±16 |