Plate flat welding flange (chemical standard HG20592, national standard GB/T9119/mechanical JB/T81): convenient to take materials, simple to manufacture, low cost, widely used; However, the rigidity is poor, so it should not be used in chemical process piping systems and highly hazardous occasions where supply and demand, flammable, explosive and higher vacuum requirements are required. The sealing surface type has flat and protruding surfaces.
Welding form: plate flat welding flange is to insert the pipe into the flange to weld.
