In construction of burying high and medium pressure piping in the same ditch, there are not only the techniques of installation and anticorrosion, but also the problems of setting the accessories, like valve well, and the problems of meeting the construction requirements.

This paper probes into the functions and effects of the pumped-storage hydroelectric station,introduces the geographic environment and engineering construction situation of Hohhot Pumped-storage Hydroelectric Station,and expounds the design of the high-pressure pipeline and the selection of the lining forms in the waterway system in its feasibility study stage.

Outer coating of pipeline is the basic part of natural gas high-pressure pipeline engineering,it hasdirect relation with the safety and stability of HP pipeline.

The numerical simulations of release and dispersion for natural gas from high-pressure pipeline were performed by using CFD modeling.

Discussion is made on the technological problems in CNG fueling station, including metering, compression and dehydration, gas storage and high pressure pipeline.

According to examples of engineering, the economy of gas storage between high pressure pipeline and spherical gasholder is compared, and the utilization condition of gas storage with high pressure pipeline in gas transmission and distribution system is discussed.

5 MPa),such as standards,connection,storage/transportation and instal- lation of HP-piping-systems,HP-valve,fittings and HP-supports,according to our experiences in design and construction and the BASELL standard.