The pressure reduction coefficient of PE gas pipeline is an important design parameter, and depends on the soil temperature around the buried pipeline.

The paper gives an analysis of the hydraulics properties,the method of connection and the feasibility of transporting artificial coal gas and the prospects of expansion application of PE gas line.

Introducesd the main revision content and the issues should be noted in the use of the new"polyethylene gas pipeline engineering Technical schedule".

The scope of application,superiority,safety measures and maintenance of buried PE gas pipe are discussed with an engineering practice in Jilin City.

Chip microcomputer-based design of electrofusion joining machine for polyethylene pipe system;

Analysis on temperature field in electrofusion joint for polyethylene pipes

Crystallinity,hardness,tensile strength and impact toughness of fusion welding joint of polyethylene pipes are tested and analyzed.