... . 4,API 5CT-1043, API 5L-0699 Linzhou Fengbao Pipe Co.,Ltd. as a seamless pipe manufacturer in the worldwide marketplace specializes ... such as multi-inspection machine, eddy current inspection, ultrasonic flaw detection and also equipment for impact test, tensile test, and metallographic analysis ... -Layer Polypropylene coated seamless steel pipe manufacturer Linzhou Fengbao Pipe Co.,Ltd.