The introduction of trade standard of HR angle for iron tower;

Study on tunnel fire-proofing board and compilation of the trade standard

The main technology indexes of revised SINOPEC trade standard of ethylene propylene copolymer viscosity index improver are explained.

To draft national standards and industry standards must be in according to the procedure to ensure the quality of standards and also have them effective.

This paper introduces mainly industry standards of tungsten-rhenium thermocouple wires.

Because of the contradiction among national codes,industry standards and local regulation,and the limited detail design,some typical problems were often met in the construction of EPS external thermal insulation,which include whether use the bolt to fix,the problems of the layer for protecting and of the design of separating chink.