• ASME B16.24-1991 铸铁管道法兰和带法兰管件 Cast Copper Alloy Pipe Flanges and Flanged Fittings Class 150 3004006009001500 and 2500..pdf
• BS EN 1092-1-2007 Flanges and their joints - Circular flanges for pipes valves fittings and accessories PN designated - Part 1 Steel flanges.pdf
• BS EN 1092-2-1997 Flanges and their joints. Circular flanges for pipes valves fittings and accessories PN designated. Cast iron flanges.pdf