... pass ISO9001 and SGS manufacturer selling A, Features of frp manhole cover:a) Corrosion Resistantb) Fire Retardantc) Impact Resistantd) High Strengthe ... Easy to Maintain B, Application of frp grating cover.Frp grating cover are often used in the fields of Petrochemical ... Equipment Aisle, Trench Cover, Boat Deck, Ventilation Grid, Fence and so on. C,We can made frp manhole cover into many shapes. ...