Hi,
for one of our projects we are using Ameron FRP piping, and all the valves are 150# FF. as you know FRP flanges thickness are more than 150# flanges. as long as two FRP flages or any wafer fitting connections, bolt lengths are coming correctly. but when ever 150# Flanges are connecting to FRP flages, the bolt lengths should come smaller than FRP-FRP flange. Please help me to solve the problem.We are using Old Bolting method.