1. MetallographyThe metallographic method is the main method to distinguish between welded steel pipe and seamless steel pipe. There is no welding material added to the high-frequency resistance welded steel pipe, so the welded seam in the welded steel pipe is very narrow. If the method of rough gri

Product: LSAW steel pipe.Specifications: 600*10*12000mm.Application: Industry construction.Arrival time: 06.28.2022.The pipes have arrived in Iran and were put into project use. Many cooperations have given the customer full confidence in THREEWAY STEEL.

1. The acceptance principle of spiral steel pipe.The quality inspection and acceptance of the spiral welded pipe shall be carried out by the technical quality supervision department of the supplier. The supplier must ensure that the delivered spiral welded pipe meets the requirements of the correspo

Spiral steel pipe maintenance medium transportation is an important part of it. Spiral steel pipe is the anti-corrosion of the outer wall of high-grade steel oil, gas, water, and heating pipelines, and the durability of spiral steel pipe has improved to a better level. The durability of the spiral s