... 0.25Mpa-10Mpa 3.temperature :0-550Stainless steel welding neck flange 1.Type:Pipe fitting2.nominal pressure:0.25Mpa- ... Certificate: ISO9002 and American API Quality System Certification. Pipes with flanges can be assembled and disassembled easily.Flange Type: ... the U.S. standard welded flange, welded flange, convex flange, with neck flange, flange cover. GB, general flange, galvanized threaded flange, ...