Flange , Stainless Steel, Carbon Steel, Duplex Stainless Steel, Alloy Steel , Monel, Ductile Iron Applications, Flanges , Including, Piping Systems For Oil And Gas, Chemical, Water Treatment And Power Generation Industries , Pressure Vessel And Heat Exchanger Connections , Valves And Pump Connections , Structural And Mechanical , Engineering, Process And Plant Piping , Fire Protection Systems , Mining And Minerals Processing , Marine And Offshore Applications And Hvac Systems .