... DN40-200mm) are mainly used for water injection and oil pipeline in the oil field, gas pipeline and etc. High pressure FRP ... high endurance, light weight and high strength are among its special properties. It is widely used in:1. Crude oil or natural gas ... injection (polymer,CO2,NaOH, etc.)lines6. Oil tank inlet and outlet lines, oil station used lines7.Oil production wells, treatment wells (brine, ...