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Now, our country produces the type of flange more, commonly used types have, carbon steel, slip on, welding carbon steel, Japanese standard flange, loose sleeve, such as flange products, because of exquisite workmanship, production excellent, by the user’s favorite and trust. These types of flange i
Welding technology:1. Tack weldingTack welding must be carried out by welders with corresponding qualification certificates. The surface and both sides of the base metal near the weld shall be uniform and smooth without burr, crack, oxide scale, rust, grease, water and other impurities.The thickness