Fourteen years of follow-upstudy had been carried out for the property change of a fiberglass reinforced pipeline (FRP) transporting feed gas containing H2S.This study focuses on the decaying degree and law of the property change, such as hardness, glass transition temperature, bending strength, bursting pressure, of this FRP with the service time under the this condition.The test results showed that the mechanical properties of base resin of the FRP decline mildly with the service time, but holding retention rate more than 80%.The strength of the FRP maintains good shown as the results of tensile strength and bursting pressure tests with the service time.Also, through the pressure calculation, this FRP pipeline can serve safely under the present transporting condition.This research provides valuable practical experience and technical support for the safe application of FRP pipeline in the gas gathering and transportation of middle and low pressure.