Mark & model : diameter: 168mm~1422mm; wt: 6mm~50mm; material:l245-l415; it is mainly used in petroleum and natural gas projects. High frequency longitudinal welding steel pipe of the same standard is adopted commonly in domestic key projects including west-east natural gas transmission project and qinshui project of cnpc. Origin : asia and pacific area china Quality standard : international H.S.Classification : metal articles articles of iron or steel 7305 tubes & pipes nesoi, external diameter > 406.4mm, of iron or steel
