... . 4,API 5CT-1043, API 5L-0699 Linzhou Fengbao Pipe Co.,Ltd. as a seamless pipe manufacturer in the worldwide marketplace specializes ... production of casing and tubing, line pipe and various other mechanical and structural steel pipes for different applications.(OD: 2.1 ... -Layer Polypropylene coated seamless steel pipe manufacturer Linzhou Fengbao Pipe Co.,Ltd.