Electrogalvanizing: also known as cold galvanizing in the industry, is the use of electrolysis, the formation of uniform, dense, well combined metal or alloy deposition layer on the surface of the parts.

Hot-rolled carbon steel pipes are divided into general steel pipes, low and medium pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, geological steel pipes and other steel pipes.

Carbon steel is a kind of steel with a carbon content between 0.02% and 2% (more than 2% is called cast iron, and less than 0.02% is called wrought iron), and very few other elements. It is also the metal material with the highest output, and the steel with relatively high other components (excluding impurities) is called alloy steel