... ",15mm - 1600mm3), Material: Carbon steel, Stainless steel and Alloy steel etc.4), Standard: ANSI, DIN, GOST, BS, ... special requirement;8), Pressure Ratings: Class 150, 300, 600, 900, 1500 and 2500 Pressure Ratings: PN 6, ... -on, welding neck, blind, threaded etc.Class150,300,600,900,150041/2”—64”BS4504, PN16, PN25, PN40, ... plate, slip-on, blind etc.Class150,300,600,900,1500 A182 F22 Alloy Steel WN Flange