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焊管
ASTM A53/ ASTM A500/ JIS G3444
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otc asthma inhaler avonotakaronetwork.co.nz焊接钢管也称焊管，是用钢板或带钢经过卷曲成型后焊接制成的钢管。焊接钢管生产工艺简单，生产效率高，品种规格多，设备资少，但一般强度低于无缝钢管。
(1) 规格
| 外径r (mm) | 壁厚(mm) | 长度(mm) |
| 15-406mm | 1.4-16mm | 5800-13000 |
(2) 牌号
| 执行标准 | 标准号 | 牌号 |
| ASTM | ASTM A53 | Gr. A, B |
| ASTM A500 | Gr A, B, C | |
| JIS | JIS G3444 | STK 290, STK 400, STK 490 |