According to the welding method, it can be divided into arc welded pipes, high -frequency or low -frequency resistance welded pipes, gas welding pipes, furnace welding pipes, and Bondi pipes. According to the shape of the weld, it can be divided into straight welded pipes and spiral steel pipes. Welding steel pipes are used for oil drilling and machinery manufacturing.
Φ219-φ2032, wall thickness 5-18mm, material Q235, Q345, X42-70.
The spiral welding steel pipe refers to the steel pipe with a steel tube with a seam with a seam with a steel belt or a steel plate bent to a round, square.
Welding steel pipe classification
According to the welding method, it can be divided into arc welded pipes, high -frequency or low -frequency resistance welded pipes, gas welding pipes, furnace welding pipes, and Bondi pipes.
According to the shape of the weld, it can be divided into straight seam welded pipes and spiral welded pipes.
Welding steel pipes are used for oil drilling and machinery manufacturing.
The furnace welding pipe can be used as water gas pipes, etc., and large -diameter straight seam welded pipes are used for high -pressure oil and gas transportation; spiral welded pipes are used for oil and gas transportation, pipe piles, and bridge pier.
Welding steel pipes are lower than seamless steel pipes and high production efficiency.
The production process of straight sewing pipes is simple, high production efficiency, low cost, and rapid development.
The strength of the spiral tube is generally higher than that of the straight seam welded pipe. It can use a welded pipe with a larger diameter of the billet material, and can also use the same width to produce a tube with different welded pipes with different billet production pipes.
However, compared with the same length of the same length, the length of the weld is increased by 30 ~ 100%, and the production speed is lower.
Therefore, most of the small -caliber welded pipes are mostly stitched welded, and most of the large -caliber welded pipes are mostly used with spiral welding spiral seam buried arc welded steel pipes to form the hot rolled tape with spiral -shaped bending. Welded into a spiral seam steel pipe (also known as spiral welding pipe, spiral tube).
Due to the following reasons, the spiral steel pipe can be widely used in the production of large diameter steel pipes
1) As long as you change the forming angle, you can use the same width to produce steel pipes with various calibers with the same width;
2) Because it is continuous bending and forming, the length of the fixed ruler of the steel pipe is not limited;
3) The spiral shape of the weld is evenly distributed on the whole steel pipe circular, so the size of the steel pipe is high and the strength is high;
4) Easy to change the size, suitable for the production of small -scale, multi -variety steel pipes.
