GB/T1591 Q345B LSAW Pipe

GB/T 1591 Q345B straight seam submerged arc welded pipe is a straight seam submerged arc welded steel pipe produced in accordance with Chinese national standard GB/T 1591, where Q345B indicates the material and mechanical performance grade of the steel pipe. Q345B welded steel pipe is a low-alloy high-strength structural steel with higher yield strength and better mechanical properties than Q345A welded pipe.
Generally, welded pipes are used to transport low-pressure fluids. Made of Q345B steel. It can also be made of other mild steels that are easily weldable. Steel pipes are subject to hydraulic pressure, bending, flattening and other experiments, and have certain requirements for surface quality. The delivery length is usually 4-10m, and delivery of fixed length (or multiple lengths) is often required. The specifications of welded pipes are expressed in nominal diameter (millimeters or inches). The nominal diameter is different from the actual. According to the specified wall thickness, there are two kinds of welded pipes: ordinary steel pipes and thickened steel pipes.

GB/T1591 Q345B LSAW pipe Chemical Composition and Mechanical Property

Straight seam resistance welded pipe

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