... 1/2 inch to 72nch5.Bend 3D, 4D, 5D etc.welding neck , slip on , socket weld , threaded, lap joint, blind, ... spectacle, orifice, ring and long welding neck flanges.SIZE: 1/2 inch-48 inch DN15-DN1200WALL ... WP11, WP15, WP22, WP1, WP5, WP9, WP91USE:Petroleum, chemical, power, gas, metallurgy, shipbuilding, construction, etc.Special design availableAll the production process ...