What is the plate flat welding flange?

HG20593 plate flat welding flange (chemical industry standard, national standard GB/T9119, machinery JB/T81) : conveniently, manufacture simple, low cost and widely used; But poor rigidity, therefore shall not be used for a supply and demand, inflammable, explosive and high vacuum degree requirements of the chemical process piping systems and height, extremely dangerous situation. Sealing surface type plane and surface.

Plate flat welding flange, flange is the most common pressure PN0.25, PN0.6, PN1.0, PN1.6, PN2.5.

The pipe welding form: plate flat welding flange is inserted into the flange welding.

The material of flat welding flange: 201304316. 316 l. 0 cr18ni9. 321.202, carbon steel, 20 #, 20 g, and alloy steel, etc.