... :2.5~60mm Standards:ASTM A53/ASTM A106/API 5L/API 5CT/JISG3452 /JISG3454/DIN1629 Gr,A,B,X42 ... , GB8162, GB8163, GB9711.1-1997, GB3087 Standards:ASTM, API, JIS,DIN, BS,GB, CNSSurface: Varnish coating or according ... seamless steel pipe, welded pipe, galvanized pipe, square tube, ERW pipe and fittings, please feel free to contact ... us. API 5L/5CT ASTM A106 GR.B/A53 GR. ...