1. material: steel/stainless steel 2. process: forge,cast 3.size:1/2''-100' 4.standard: DIN, BS, USS, ... , EN, BS, and customers' drawings for special use;Material Carbon steel, alloy steel, stainless steelPressure RatingsClass 150, 300, 600, 900, 1500 and 2500PN ...