welded carbon steel tubes
1.ASTM ERW : ASTM A106 , A53 ,   SPECIFICATION : 1/2″-24″,21.3-609.6mm
2.EN ERW BS1387 ,   SPECIFICATION : 1/2″-12″,21.3-323.8mm
3. GB9947-88 YB/T5209-2000 Specification:   
Φ10×0.5~1.0   Φ43×1.0~2.0 welded steel tubes/pipes     
Φ12×0.5~1.0  Φ44×1.0~2.0 welded steel tubes/pipes     
Φ13×0.5~1.0  Φ45×1.0~2.5 welded steel tubes/pipes    
Φ14×0.5~1.0 Φ48×1.0~2.5 welded steel tubes/pipes     
Φ16×0.5~1.5 Φ50×1.0~2.5 welded steel tubes/pipes     
Φ17×0.5~1.7 Φ51×1.0~2.5 welded steel tubes/pipes     
Φ18×0.5~1.0 Φ53×1.0~2.5 welded steel tubes/pipes     
Φ19×0.8~2.0 Φ55×1.0~2.5 welded steel tubes/pipes     
Φ20×0.8~2.0 Φ56×1.0~2.5 welded steel tubes/pipes     
Φ22×0.8~2.0 Φ57×1.0~2.5 welded steel tubes/pipes     
Φ24×0.8~2.0 Φ58×1.0~2.5 welded steel tubes/pipes     
Φ25×0.8~2.0 Φ60×1.0~2.5 welded steel tubes/pipes     
Φ27×0.8~2.0 Φ63×1.0~2.5 welded steel tubes/pipes     
Φ28×1.0~2.0 Φ65×1.0~2.5 welded steel tubes/pipes     
Φ29×1.0~2.0 Φ68×1.0~2.5 welded steel tubes/pipes     
Φ30×1.0~2.0 Φ70×1.0~2.5 welded steel tubes/pipes     
Φ32×1.0~2.0 Φ76×1.0~5.0 welded steel tubes/pipes     
Φ33×1.0~2.0 Φ89×1.0~5.0 welded steel tubes/pipes     
Φ34×1.0~2.0 Φ90×1.0~5.0 welded steel tubes/pipes     
Φ35×1.0~2.0 Φ102×2.0~5.0 welded steel tubes/pipes     
Φ36×1.0~2.0 Φ110×2.0~5.0 welded steel tubes/pipes     
Φ38×1.0~2.0 Φ114×2.0~5.0 welded steel tubes/pipes     
Φ40×1.0~2.0 Φ133×2.0~5.0 welded steel tubes/pipes     
Φ42×1.0~2.0 Φ140×2.0~5.0 welded steel tubes/pipes

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