Structure and characteristics of thermal insulation large-diameter spiral welded pipe1. Features of heat preservation large-diameter spiral welded pipe:Polyurethane foam has good mechanical properties and thermal insulation properties. Under normal circumstances, it can withstand a temperature of 12

What are the factors that cause horizontal lines in spiral seam submerged arc welded steel pipes?First of all, it may be due to the stress of the spiral seam submerged arc welded steel pipe. That is, the residual stress and welding stress after the steel pipe is formed.Secondly, due to the presence

Steel pipe piles are widely used in various situations such as supporting piles and friction piles. Especially when it is used as a supporting pile, it can be fully driven into a relatively hard supporting layer, so it can exert the bearing effect of the strength of the entire section of the steel.

The difference between straight seam welded pipe and spiral welded pipeThere have always been many customers asking about the difference between straight seam welded pipe and spiral welded pipe, just because of the difference in the shape of the weld, is there a difference in use and various process