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How to treat internal pressure and external pressure bellows compensator differently

Time: 04-13 󰃯 Reading times: 188 󰃳 Editor in charge: The sea 󰃗 Column: product focus

Introduction: Corrugated compensator is a kind of compensation equipment which uses the expansion deformation of elastic element metal bellows to absorb the specification changes caused by thermal expansion and cold contraction of pipes, pipes or containers. It can absorb radial, transverse and angular offsets, which can be used in pipes, equipment and containers

ripple Compensator It is a kind of compensation equipment that uses the expansion deformation of elastic element metal bellows to absorb the specification changes caused by thermal expansion and cold contraction of pipes, pipes or containers. It can absorb radial, transverse and angular offsets, so as to absorb vibration and reduce noise in heating position and mechanical offset of pipes, equipment and systems.
Bellows compensator In order to compensate for the additional in-situ stress caused by temperature difference and mechanical vibration, a flexible structure set on the vessel shell or pipe. It has been widely used in chemical industry, metallurgy, nuclear energy and other sectors because of its advantages of reliability, good performance and compact structure.
Application of heating pipe Corrugated compensator Generally, there are two types: internal pressure type, with flange on both sides and part of wave body in the middle. The design feature is that the medium flows in the internal of the compensator, while the pressure type has both sides of the flange, and the internal part is a part of the wave body. The specification of the bellows of the external pressure compensator will be one size larger than that of the pipe. For example, the nominal pressure diameter of the pipe is DN300 The specification of bellows is DN350. The characteristic of the design is that the medium flows outside the bellows of the compensator. The internal pressure type bellows compensator absorbs the thermal expansion of the pipe according to the reduction of the corrugated, while the external pressure type bellows compensator absorbs the thermal expansion joint of the pipeline according to the rash ripple.
According to the standard, the internal pressure type needs to be pre stretched according to the ambient temperature before installation, and the external pressure type needs to be pre shrunk according to the working temperature before installation. Nowadays, many manufacturers are afraid of making mistakes or inconvenient on-the-spot service items. They have already carried out pre stretching or reducing before the original factory of the compensator, or have vacated a large capacity, so the construction unit is not required to operate on the spot. The actual requirements of the manufacturer can be referred to. Before application, make sure whether it is gas pressure or external pressure type. There are essential differences between the two, and the application is not the same. The internal pressure type can immediately check the ripple condition; the external pressure type can not be cut. Therefore, opening the seamless steel pipe in operation will lead to medium leakage. Performance characteristics of axial external pressure bellows expansion joint of radial external pressure type bellows expansion joint: the external pressure type bellows expansion joint is composed of inner cylinder, bellows, outer cylinder and attached components. Under pressure, the bellows has good sealing and bending resistance, can absorb large displacement, and can be made into single injection, double direction, and other forms. The axial external pressure type corrugated compensator mainly absorbs radial offset and has the advantages of large compensation, good heat preservation performance and removal of residual medium.