Bellows compensators are also customarily called expansion joints or expansion joints. A corrugated pipe (an elastic element) consisting of a main body of work, an end pipe, a bracket, a flange, a conduit, etc.. Mainly used in various pipelines, it can compensate for the thermal displacement of pipe, mechanical deformation and absorb all kinds of mechanical vibration, play a role in reducing the deformation stress and improving the service life of pipes. The connection mode of ripple compensator is divided into two kinds: flange connection and welding. The welded pipe of the buried pipeline is usually welded (except for trench installation)

Working principle

Ripple compensator is a compensation device for the size change of deformation of the elastic element by using effective telescopic compensator to absorb the causes of pipeline, pipe or vessel by thermal expansion and contraction resulting, belongs to a compensating element. Absorption of axial, transverse, and angular displacements.

Testing

Because of the different compensation forms of different types of ripple compensators, there are mainly axial, transverse, angular and combined compensation methods. For a kind of wave compensator with various displacements at the same time, the total equivalent axial displacement is obtained by synthesizing its various displacements, and the detection is equivalent to the total equivalent axial displacement. That is to say, the detection of nominal displacement of the ripple compensator is to detect the total equivalent axial displacement.

The nominal displacement of a general type bellows is in fact the capacity of the nominal displacement deformation given by the bellows. The tube made of corrugated expansion joint (compensator), compensator, commonly referred to as the amount of compensation, reflects the ability to absorb displacement of the corrugated pipe system, that under certain conditions, the maximum compensation capacity of products. When the bellows work normally, the displacement of the system must be absorbed to produce displacement and deformation. At the same time, a certain number of times of normal safety work and displacement cycles must be guaranteed. The corrugated pipe in the design, according to the displacement of each wave can withstand, there is a certain number of corrugated design, as each wave are uniformly under displacement load, no local overload, the bellows can work normally. When the design is reasonable, the design cycle displacement times can be guaranteed. In the JB/T 6169-92 metal bellows standard, the test of this performance is specified.