The classification,main modes,scope of application,advantages and defects of city natural gas transmission and distribution network are compared,the principle for selecting gas transmission and distribution network is put forward,and the application of regulator box and PE pipe in a medium-pressure single stage system is discussed.

The requirements for valves in urban natural gas transmission and distribution system and the selection of materials for valve body are introduced,and the scope of application for different natural gas valves and the matters needing attention in the selection are analyzed.

The composition of monitoring system for scheduling automation of natural gas transmission and distribution network composed of three subsystems including SCADA,GIS and emulation subsystem is introduced with an engineering example.

It introduces characteristic and kinds of line pipe for petroleum and natural gas transmission.

The pressure ranges from several to tens of MPa in gas transmission, so the natural gas can not be handled as ideal gas in the property calculation.

Application of microwave heating technique in natural gas transportation;

Taking the natural gas transportation from Taiyuan to Jinzhong as the example, this paper explains in detail the technical characteristics of the route survey, crossing-over engineering survey and station site survey in the natural gas pipeline survey.