Performance of speciality HDPE resin for gas pipe;

Differential scanning calorimetry (DSC) tests were carried out on several main polyethylene gas pipes on domestic market by means of Isovelocity Temperature Drop Crystallization and Gradient Isothermal Crystallization.

Studies and analyzes mechanical property, creep crack propagation resistance and melt strength of Qilu PE100 gas pipe speciality resin DGDB2480HBK.

Through analysis on the process of unsteady leakage of gas pipeline,the calculating model of unsteady leakage rate has been established.

An integrity management system for Xining gas pipeline was introduced,which has been proved successful.

Inquiry into a few issues related to the gas-tight test of outdoor gas pipeline;

The waterpower calculation table exploitation and its application about low pressure branch gas pipelines;

Finite element analysis of residual stress of welding repair for gas pipeline;

The problems existing in concealed gas pipe and resolving measures

This article describes the basic principle of the calculation for gas pipe resistance.

The author intruduces the characteristics of city gas pipe installation, the points of supervision ?inspection and his suggestion.

Modified-genetic algorithm in optimal layout of gas network;

Method of numbering the nodes of gas network s waterpower calculation drawing automatically by computer;

Reason analysis on the leakage of gas network and prevention measures;