What type of flange does it fit with the gate valve?
This depends on the type of gate valve, valve standards are marked with matching flange standards. Different types of flanges for different gate valves are also different.The flange of General GB gate valve is GB/T9113 series.
According to the welding plate flange, flange material selection of piping material.
According to the welding plate flange, flange material selection of piping material.