Pipe and Fitting Grade Vinyl Ester

Pipe and Fitting Grade Vinyl Ester is a bisphenol A-based vinyl ester resin qualified for FRP pressure pipe and fitting manufacture per ASTM D2996, ASTM D2997, ISO 14692, and AWWA C950 standards. The resin is formulated with a viscosity of 200-400 mPa·s at 25°C for efficient wet winding in filament winding processes and hand lay-up of pipe fittings.

The chemical resistance of this grade covers the full spectrum of water treatment chemicals, dilute process acids and alkalis, and hydrocarbon services at ambient to moderate temperature. HDT after post-cure at 80°C/2h is 110-125°C. Long-term hydrostatic strength (Hydrostatic Design Basis, HDB) testing per ASTM D2992 regression methods demonstrates excellent long-term structural integrity under cyclic and sustained pressure.

Applications include corrosion-resistant chemical plant piping, oil refinery demineralization water pipe, desalination plant FRP pipe headers, and chemical injection pipe. The resin is compatible with all glass fiber systems used in pipe winding (polyester and vinyl ester-compatible sizing) and with standard jointing methods including adhesive bonding, butt-strap joints, and flanged connections.