carbon steel high-neck Flange 1, ASTM A 234 WPB 2 , 90% PRODUCTS ARE EXPORTED OVERSEAS 1, ASTM A 234 WPB 2 , 90% PRODUCTS ARE EXPORTED ... 150 to 2,500Materials: A105, A182 F5,F11,F12,F22, F304, F304L, F316, F316L, A234 WPB,WPC,WP5,WP11,WP22,WP91 carbon steel high-neck Flange ...