The development of steel pipe production technology began with the rise of the bicycle manufacturing industry, the development of petroleum in the early 19th century, the manufacture of ships, boilers, and aircraft during the two world wars, the manufacture of thermal power boilers after the two wor

Nowadays, the demand for spiral steel pipes is increasing. In order to win the initiative in the competition, many manufacturers produce and sell unqualified spiral steel pipes in quality. Here is how to distinguish spiral steel pipes,Prevent you from being deceived in the purchase.

Spiral pipe is also called spiral steel pipe or spiral welded pipe. It is made by rolling low-carbon structural steel or low-alloy structural steel strip according to a certain spiral angle (called forming angle) into a tube blank, and then welding the pipe seam together. It can produce large-diamet