... /4"~48" WT:2.5~60mm Standards:ASTM A53/ASTM A106/API 5L/API 5CT/JISG3452 /JISG3454/DIN1629 ... 48"WT:Various from 2.5mm to 60mmMaterial: ASTM A53, ASTM A106,,10#, 20#, 45#, 16Mn, A25,A25P ... St52, GB8162, GB8163, GB9711.1-1997, GB3087 Standards:ASTM, API, JIS,DIN, BS,GB, CNSSurface: Varnish coating ... seamless steel pipe, welded pipe, galvanized pipe, square tube, ERW pipe and fittings, please feel free to ...