HOW TO CHOOSE THE HIGH QUALITY OF STRAIGHT SEAM WELDED PIPE

Straight seam steel pipe is made by high frequency welding units or submerged arc welding machine, by welding. High frequency straight seam welding steel pipe domestic currently produce range: 3-25 mm diameter of 10-711 – mm thickness. Submerged arc welding can produce scope, straight seam steel pipe diameter: 325-1420 – mm thickness 8-25 mm.

Straight seam steel pipe process simple, production speed so it in the urban construction, steel structure engineering, gas engineering and water supply and drainage engineering construction plays an irreplaceable role. So choose good quality straight seam steel pipe is the necessary factor to ensure project to be carried out smoothly.

How to choose a good quality straight seam welded pipe? In choosing first pay attention to the material as a straight seam steel pipe, straight seam steel pipe made of Q235, 16 mn, and L245, etc., must first determine whether the material in the inspection qualified. The second to see straight seam steel pipe wall thickness, whether meet the requirements of wall thickness, tolerance is within the scope of national requirements. Third depends on steel pipe surface situation, whether to have rust, rust, generally yellow rust is no problem, usually yellow rust is a layer of floating rust, a little bit serious red rust, but after the annealing can also be used on some of the items is not very strict, but if it’s black rust, that the pipe can only sell the scrap metal.

And to see whether there is oil steel pipe surface, because straight seam steel pipe in the process of production is likely to be infected with oily be soiled on unit, finally, we want to see the end of the pipe cross section is round or extrusion is not neat. It remains to be seen whether the burr. Through above several strict detection means if steel pipe all through, so that the pipe is qualified.