As a large pipe, the spiral steel pipe should pay attention to avoid collision friction during the transportation and loading process, because the surface of the steel pipe is usua
The spiral steel pipe is sent to the welded pipe unit with steel, rolling through multiple rolling rolls, and gradually rolling up with steel, forming a circular tube blank with a
Production method The steel pipe can be divided into two categories according to the production method: seamless steel pipes and sewing steel pipes, and sewing steel pipes are refe
Features of welding pipes The production process of straight sewing pipes is simple, high production efficiency, low cost, and rapid development. The strength of the spiral tube is
During the work of the welding pipe, its production process is simple and high in production. The cost is low and develops rapidly during use. The welded pipe can also be welded pi
The main objects of X -ray detection and ultrasonic detection are the docking joints of straight welded steel pipe connections and welded pipes. There is a tendency to crack after
Selection principles of non -destructive detection methods on the surface of straight seam steel pipes: Magnetic powder detection is selected, and non -iron magnetic steel pipes ar
Before the straight seam steel pipe is not tested, the appearance inspection of the weld should meet the requirements. The welding joint for tube joints generally requires the appe
The welding tumor refers to welding metal with extra welded seams. The actual size of the welding tumor causes deviations of the weld, and a stress concentration area is formed at
During the welding process, the spiral tube manufacturer overflows it to the lack of heated mother material or welded seams, and coagulates into metal tumors. This metal tumor that
In terms of welding process, the welding method of the spiral steel pipe and the straight seam steel pipe is consistent, but the straight seam steel pipes inevitably have a lot of
The process of hot -dip galvanized processing process is relatively complicated, and the time used in processing is relatively long. Generally, the quality of the processing proces