Both stainless steel seamless pipes and stainless steel welded pipes can be cold processed --- cold rolling and cold drawing to meet higher requirements for cold processed products.

The main production process layout and equipment composition of row-roll forming The row-roll forming machine is a major component of the welded pipe production line. It is the core of production and the key equipment on the production line, which is responsible for bending flat steel strips into round tube billets.

ASTM A519 Grade 4130 is a carbon and aluminum alloy steel seamless tube for mechanical engineering manufactured in accordance with American Society for Testing and Materials

The production process of galvanized straight seam welded pipe is relatively simple. The main production processes are electric resistance welded straight seam steel pipe (ERW pipe) and submerged arc welded straight seam steel pipe (LSAW pipe). Straight seam pipe has high production efficiency, low cost and rapid development.

The main equipment of ERW pipe mill line includes1. Uncoiler The hot-rolled steel coil is disassembled and sent to the leveling machine. It is divided into two unwinding methods: upper unwinding and lower unwinding.

The offset defect of ERW steel pipe, also called lap welding, refers to the misalignment of the two edges of the tube blank during welding. Even after the internal and external burrs are removed, traces of offset can still be seen on the inner and outer surfaces of the steel pipe.