| 摘要 |
The present invention relates to apparatus for use in venting pipelines that have a plastic lining such as these used for transporting hydrocarbon fluids. A pipeline assembly comprises a pipeline ( 2 ), a corrosion resistance liner ( 3 ), and a micro-annulus ( 4 ) located between said pipeline and liner. The pipeline assembly also comprises a venting means ( 5 ) adapted for fitment in or through the corrosion resistance liner ( 3 ), wherein the venting means ( 5 ) allows gas to flow from the micro-annulus into the center of the pipeline assembly but not in the opposing direction. |
