GRP LINER AND BENCHINGS are Corrosion resistant, lightweight and manufactured under stringent quality standards, GRP Manhole Liners are available from the diameters range of 600mm up to 3200mm and can be supplied with lengths up to 12 meters. The increasing knowledge of the operational cost savings and superior corrosion resistance offered by glass – fiber reinforced plastic pipe by AFG operations has resulted in its widespread application for storm water and sewerage Projects.
GRP Liners are basically used to protect the structure from corrosion due to the acid and gases formed during sewage metabolism. AFG manhole liners are flexible composites constructed of a thermosetting chemical resistant resin, glass fiber reinforcement and additives as required. The manhole is a cylinder that can be provided with benching unit, cover slabs with a round or square opening, and the lugs fixed as per the appropriate project drawings.
The GRP Liner shaft is produced on filament winding machine using the same basic process of IPF GRP pipe production. The Cover Slab, Benching, Chamber, Gully Port, Ladder, Safety Cages, Handrail, Bucket & Saddle units are manufactured by hand lay-up process utilizing chopped strand mat and vinylester or polyester resin. A non slippery surface is provided at the inner surface of the benching & Chamber units.