FRP flange joints require careful design, proper gasket selection, and controlled bolt torque procedures to achieve a reliable leak-free seal without damaging composite sealing faces.
Unlike steel flanges that can withstand high bolt loads, FRP flanges have lower allowable seating stresses and are susceptible to cracking or bowing if over-torqued or unevenly tightened.
Utilizing full-face elastomeric gaskets, torque-limiting wrenches, and star-pattern tightening sequences ensures even gasket compression while preserving structural flange integrity.