5 Heat Treatment Processes for Seamless Steel Pipes
The heat treatment process of seamless steel pipe mainly includes the following 5 categories:
1. Quenching + high temperature tempering
The steel pipe is heated to the quenching temperature to trans...
How to Solve these Problems Encountered in Welding?
1. Cracks
Hot cracking, in the process of welding seam cooling, due to the sulfur and phosphorus impurities in the steel or welding material and the steel to form a variety of brittle and hard low-me...
Elimination of Scratches on the Surface of Welded Pipes
Causes of scratches on the surface of welded pipes (LSAW/SSAW/ERW Pipe):
The welded pipe using roll forming requires the strip to be bent into a circle transversely. This is achieved by deforming the...
Welding Process Parameters Affect the Shape of Submerged Arc Welding Seam
Submerged arc welding (SAW) is mainly suitable for welding at the flat welding position. If certain tooling aids are used, welding at fillet welding and horizontal welding positions can be realized. T...
China Removes VAT Rebate on Steel Exports, Cuts Tax on Raw Material Imports to Zero
China removes VAT rebate on steel exports, cuts tax on raw material imports to zero
1. Removes rebate on export of 146 steel products from May 1
2. Cuts import duty on pig iron, crude steel, recycl...
Production Process of Straight Seam Welded Pipe
Straight seam welded pipes, steel pipes made of hot-rolled or cold-rolled steel plates or steel strip coils welded on welding equipment, are all called straight seam welded pipes. (The name is given b...
