... . 4,API 5CT-1043, API 5L-0699 Linzhou Fengbao Pipe Co.,Ltd. as a seamless pipe manufacturer in the worldwide marketplace ... ,X42,x46,x52Weight calculation formula(OD-WT)*WT*0.02466 KG Per meterSpecificationDirectly we produce pipes by the specifications: OD: 2 ... -Layer Polypropylene coated seamless steel pipe manufacturer Linzhou Fengbao Pipe Co.,Ltd.