Strailed steel pipes are widely used in various industries, such as oil, metallurgy, construction, coal mines, ports, machinery and other industries. During the installation and use of straight seam steel pipes, it has strict technical requirements. It is necessary to carry out the safety and quality of straight steel pipes in accordance with the actual situation and operating specifications. So what should be paid attention to when installing and using straight steel pipes?
1. Construction preparation before the installation of straight steel pipes
The pipe ditch should be dug according to the requirements of the drawings. The pipeline well brick is completed. The various types of straight sewing steel pipes needed for the goods have been arrived. The quality is intact and inspection. The preparation of electric hammer and polishing machines can be installed only by doing a series of preparations.
2. Installation process of straight seam steel pipes
Pipeline positioning according to the design of the drawing, the prefabricated pipeline bracket according to the on -site situation, then the feeding according to the design and site, and then use the polishing machine to grind the slopes, and then welded. During the welding, bring the steel to the welded pipe unit, rolling through multiple rolls, and gradually rolled up with steel to form a circular tube blank with open space. 3mm, and the ends of the welding port are flat. If the gap is too large, the adjacent effect will be reduced, the hearing heat is insufficient, and the welded seam crystals are indirectly combined with the molten or cracking. If the gap is too small, the neighborhood effect is increased, the welding heat is too large, causing welding seams to be damaged; or the weld is squeezed and rolled after rolling, which forms a deep pit, which affects the surface quality of the weld.
3. Installation quality inspection of straight seam steel pipes
① The welding seam is not allowed to weld the support, and the bend is avoided with welding seams.
② The vertical vertical deviation of the vertical installation should be less than 3 mm, and the deviation of the horizontal installation should be less than 1 mm.
③ The surface quality of the straight seam welded pipe should be smooth, and defects such as folding, cracks, layers, and welding are not allowed. Mild defects such as trails, scratches, weld dislocation, burn, and scars on the surface of the straight seam tube shall not exceed the thick negative deviation of the wall.
