The production process of butt welding flange with neck mainly includes: casting flange mainly contains free forging, die forging, rolling flange, cutting flange.
The main application of butt-welding flange with neck: connection of pipeline. In the pipeline to be connected, a variety of flanges are installed. The low-pressure pipeline can use the wire-jointed flange, and the 4 kg butt-welding flange with neck with buoyancy. The two flanges can be sealed tightly and then fastened with screw. The whole forged flange should be inspected one by one for its hardness. It meets the standard requirements.
Check and test the other properties of flanges of high quality carbon steel, alloy steel and stainless steel forgings of grade II, III and IV, and check and test according to the regulations in the code. In order to prevent mixing, the forged flanges of alloy steel, cryogenic steel and stainless steel are analyzed quantitatively before leaving the factory. The implementation standards include national standards, Ministry of Chemical Industry standards, Ministry of Machinery