1.flange Material:Rst37.2,S235 JRG2,C22.8,SS400,SF440A,A105

2.flange Size:1/2"-40" 

3.Flange varieties : plate. slip-on, welding neck, threaded, socket weld, lap-joint flange, reducing flange, blind flange,

4.Flange surface treatment: transparent /black / yellow anti-rust paint ,transparent oil ,hot galvanized