Galvanized steel pipe is a section steel with a square cross-section shape and size made of Q235 hot-rolled or cold-rolled strip or coil as the base material, which is formed by cold bending and then high-frequency welding. Hot-rolled extra-thick-wall galvanized steel pipes, except for the increase in wall thickness, the corner size and edge flatness reach or exceed the level of resistance welded cold-formed galvanized steel pipes. Main welding process for welding galvanized steel pipe.
Welding the narrower blanks of galvanized steel pipes produces welded pipes with larger pipe diameters, and can also produce welded pipes with different pipe diameters from the same width blanks. However, compared with the straight seam galvanized steel pipe of the same length, the weld length is increased by 30-100%, and the production speed is lower.
Large diameter or thick welded galvanized steel pipes are generally made directly from steel blanks, while small welded pipes and thin-wall welded pipes only need to be directly welded through steel strips. Then after a simple polishing, drawing is fine. Therefore, most of the smaller diameter welded pipes adopt straight seam welding, and the large diameter welded pipes mostly adopt spiral welding. Good comprehensive mechanical properties, good weldability, cold and hot workability and corrosion resistance, and good low temperature toughness.
Points to note when cutting galvanized steel pipes:
(1) At the place to be cut, please use a rag or soft cloth to completely wipe the oil, debris or soil on the surface of the galvanized steel pipe.
(2) Be sure to choose special stainless steel cutting.
(3) The cutting position should be matched with the construction drawing and the conditions of the site. Use a meter ruler or other measuring tools to draw the determined position and mark the cutting line.
(4) When cutting, use a vise or other galvanized steel pipe to fix the appliance, and then cut it after it is firmly fixed.
(5) The cut surface of the galvanized steel pipe should be perfectly round, and the cut line should be at right angles to the axis of the galvanized steel pipe.
The aesthetic process of welding galvanized steel pipes and rectangular pipes will continue to advance with the development of science and technology, so that the welding process of galvanized steel pipes will be more perfect, and the production will be better and more beautiful.
