... 900psi (15.0Mpa), 1500psi(25.0Mpa), 2500psi (42.0Mpa), b, The public diameter: 6 ~ 4000mm c, Flange structure type: welding, socket welding ... The flange structure: Integral flange Unit flange a, threaded flange b, welding flange, welding neck flange, welding neck flange, socket ... \WN\BL\TH) Ministry of Chemical Industry standard:HG5010-52~HG5028-58\HGJ44-91~HGJ65-91\HG20592-97series\HG20615-97series ...