... , ASTM A106,,10#, 20#, 45#, 16Mn, A25,A25P,A,B,X42,X46, X52,X56,X60,X70 C20, C45, St52, GB8162, GB8163, GB9711 ... .1-1997, GB3087 Standards:ASTM, API, JIS,DIN, BS ... as 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 ...