Steel Tube Standard: GB/T3639,8162,3087,ASTM A106,A192,BS3059,3601,3602,6323, DIN1629,1630, ... extruded tube seamless by standard GB/T3639,8162,3087,ASTM A106,A192, BS3059,3601,3602,6323, DIN1629,1630, JIS ... G34541.Standard:GB/T3639,8162,3087,ASTM A106,A192,BS3059,3601,3602,6323,DIN1629,1630,JIS G34542 ... 40,47,50By JIS:SPHD,SPCC,SPCD,SPCE3.Size: O/D 6-400mm Wall thickness 0.5-40mm4.Packing ...