Size：NPS2～NPS72 / DN50～DN1800 Class：150PSI～232PSI / PN6～PN16 Design：API609 GB/T12238 Connection Ends：WAFER，LUG，RF Main Materials：Cast iron, nodular cast iron, carbon steel, stainless steel, dual phase steel, etc Medium：Water, gas, oil products, corrosive media, etc

Size：DN100~DN5000 Class：PN6~PN100 Design：JB/T 8692，GB/T 8527 Connection Ends：RF，BW Main Materials：Carbon steel, alloy steel, stainless steel, etc Medium：Water, steam, high temperature gas, etc

Size：NPS2～NPS72 Class：CL150～CL900 Design：API609 Connection Ends：WAFER，LUG，RF，RTJ，BW Main Materials：Carbon steel, alloy steel, stainless steel, dual phase steel, nickel base alloy, etc Medium：Water, steam, oil products, corrosive media, etc