行管specification: 10.3-2032×1.7-39.7mm Executive Standard: GB/T9711.1/API SPEC 5L Uses: Used for gas, water and oil transportation in oil and natural gas industry API SPEC 5L-2011 (Line Pipeline Specification), prepared and published by the American Petroleum Institute, is common across the world. Line pipe: It transports oil, gas or water pumped out of the ground to the oil and gas industry. The line pipe includes two kinds of seamless and welded pipe. The pipe end has a flat end, a threaded end and a socket end; the connection mode is a terminal welding, a coupling connection, a socket connection, and the […]