For oil, gas or water transportation . Line pipe convey the oil, gas or water to petroleum and gas industrial enterprise.
There are two kinds of line pipe, which is seamless line pipe and welded line pipe. There is plain, threaded and socket ends, accordingly they connect with each other via welding, thread and socket connection.
Standard and grades:
API Spec 5L—pipeline standard GB/T9711 —oil and gas transportation standard
Grade: API Spec 5L, GB/T 9711
Production Size Range: OD 21.3mm to 508mm x WT 3mm to 40mm