ASTM A53 line pipe is a line pipe that belongs to the American Petroleum Standard.

Structural seamless steel pipe is used for manufacturing pipes, containers, equipment, pipe fittings and mechanical structure seamless steel pipe.

Thick-walled steel pipe, refers to steel pipe with a ratio of the outer diameter of the steel pipe to the wall thickness of less than 20.

American Standard Seamless Steel Pipe Executive Standard

Introduction of seamless steel tube quality inspection

Special-shaped seamless steel pipe is the general term with cross-sectional shapes other than round tubes,play a vital role in urban construction. Its quality directly affects the solidity and quality of living buildings.