Design and applicaluin of automatic pressure test equipment of the blowout preventer;

Several noticeable problems of pressure test of DN1000 prestressed concrete pipe;

Large-diameter Pipe Cleaning and Pressure Test Techniques;

This paper introduced the technology of pigging,diameter measuring & pressure testing for Guangdong LNG trunk-line.

The pressure testing and washing scheme of circular water tube of BF body is worked out in detail.

It has certain difficulties to perform pipeline pressure testing and drying because of com-plicated and variable topography and landform,long distance,big pipe diameter and high pressure.

In particular, this code does not contain specific provisions for applicative conditions of air test in Class One region or Class Two region.

An ideal floating-head exchanger pressure test positioner,general purpose O-type ring seal pressure test positioner was introduced,and a comparison between packing seal pressure test positioner and C-type ring seal pressure test positioner was also made both in theory and application effect.

This paper is a discussion of the design of the sealed pressure test positioner utilizing heat exchanging pipe ends.