Electric Fusion Welding (EFW) and Electric Resistance Welding (ERW) are two common metal welding methods.

ERW steel pipes include HFW steel pipes.

Steel sheet piles can continue to be used after certain repairs and can be reused many times.

This article will introduce the production process of black mild steel pipe, including raw material preparation, steel pipe rolling, welding and heat treatment.

This article mainly introduces the two major differences between manual arc welding and submerged arc automatic welding, as well as welding electricity protection measures.

This article will introduce in detail the function, material and selection method of oil steel casing.