because most of the pipe fittings are used for welding, in order to improve the welding quality, the end of the car groove, leave a certain Angle, with a certain edge, this requirement is also strict, the thickness of the edge,
Pipe reducer are steel hot pressed or forged joints. The connection form is to directly weld the joints to the steel pipes. Butt welding size head generally has concentric size head and eccentric size head, materials are carbon steel, alloy steel and stainless steel.
Pile spiral weld steel pipe is made of hot-rolled steel strip coil as pipe billet, often temperature spiral forming, and made of double-sided submerged arc welding or high-frequency welding. It is used for steel pipe used in civil building structure, wharf, bridge and other foundation piles.
Duplex stainless steel is a kind of steel with excellent corrosion resistance, high strength and easy manufacturing. Their physical properties are between austenitic stainless steel and ferritic stainless steel, but more similar to ferritic stainless steel and carbon steel.
