Press LSAW steel pipe and spiral welded pipe is divided into Longitudinal. Longitudinal simple consumer technology, consumption and high efficiency, low interest rates, to carry out fast. The strength of spiral steel pipe common than straight seam high, can narrow the larger diameter structural steel pipe billet consumption, but also the width of the blank with the same consumption of different diameter pipe. But with the same length of straight seam pipe compared to the weld length of 30 to 100% and the consumption rate is low. Thus, the smaller diameter pipe actually use straight seam steel pipe, large diameter spiral welded pipe is mostly used.

Welded steel pipe issteel or steel plate with a bending round, square and other shape and then welded into the surface of the pipe joints. Welded steel consumption process is simple. Types of specifications, equipment, less capital, but the average strength of less than seamless. Since the 1930s, with the consumption of high-quality steel strip rolling and moving rapidly to carry out welding and inspection technology, advances from time to time weld quality, welded steel pipe increasing the types of specifications, and replace more and more areas seamless steel pipe.

LSAW steel pipe capital than low consumption and high efficiency. Straight seam steel consumption process is simple. Interest rates low, to carry out fast. Spiral welded pipe Longitudinal strength than ordinary high, can narrow the larger diameter pipe billet consumption, but also the width of the blank with the same consumption of different diameter pipe. But with the same length of straight seam pipe compared to the weld length of 30 to 100% and the consumption rate is low. Thus, the smaller diameter pipe actually use straight seam welded, large diameter spiral welded pipe is mostly used.

Because welding is divided into different furnace pipe, welding (ERW) pipe and automatic arc welded pipes. Because of the different welding seam is divided into straight and spiral welded steel pipe two. End of its round shape is divided into welded and shaped (square, flat, etc.) pipe. Pipe material and its usefulness as a number is divided into different categories: welded steel pipe used is steel billets or strips.

GB/T14291-1992 mainly for mine air pressure, drainage, gas discharge axis with straight seam steel pipe. The representative material Q235A B grade steel.

GB/T14980-1994 primarily for bona fide water, sewage, gas, air, steam heating and other uses such as low-pressure fluid. The representative material Q235A grade steel.

GB/T3091-1993 primarily for bona fide water, gas, air, oil and heating hot water or low pressure steam and other fluids, and other common use tube. The representative material Q235A grade steel.