Outer diameter-406.4~1422.4mm(16-56in) Pipe Length-3~12.5m Wall Thickness-6~50mm Standard-API 5L,API spec 2B,GB/T9711,ISO3183 Hebei Haiqianwei Steel Pipe Co.,Ltd Outer diameter-406.4~1422.4mm(16-56in)Pipe Length-3~12.5mWall Thickness-6~50mmStandard-API 5L,API spec 2B,GB/T9711,ISO3183,etc Hebei Haiqianwei Steel Pipe Co.,Ltd, uses the most advanced technology of JCOE LSAW steel pipe manufacture in ...