Gongyi Hongxing Pipeline Equipment Factory specializes in producing corrugated compensators: Corrugated compensators, also known as expansion joints or telescopic joints. It consists of bellows (a kind of elastic element) that constitutes its working body, and accessories such as end pipes, brackets, flanges, and ducts.
Belongs to a compensating element. The effective expansion and contraction of the bellows of its working body is used to absorb dimensional changes caused by thermal expansion and contraction of pipelines, pipes, vessels, etc., or to compensate axial, lateral and angular displacements of pipelines, pipes, vessels, etc. Can also be used for noise reduction and vibration reduction. Widely used in modern industry.
Corrugated compensator classification:
Disposable bellows compensator, U-shaped metal expansion joint, bellows compensator, special corrugated compensator for three-dimensional coal powder, hinged bellows compensator (JJL type), balanced curved pipe pressure corrugated compensator, ball type QB stainless steel corrugated Compensator and so on.
Corrugated compensator Standard bellows compensator Standard number: GB/T
Corrugated compensator Standard name: General technical conditions for metal bellows expansion joints Date of implementation: 2000-3-1
Promulgation Department: State Bureau of Quality and Technical Supervision Content This standard specifies the definition, classification, requirements, test methods, inspection rules, signs, and packaging, transportation, and storage of metal ripple compensators. This standard is applicable to the design, manufacture and inspection of circular bellows compensators installed in the pipeline whose flexible parts are integrally formed without reinforcement U-shaped, reinforced U-shaped and ∩-shaped bellows. The design, manufacture and inspection of expansion joints for pressure vessels can also be referred to.
Corrugated compensator connection The corrugated compensator connection is divided into flange connection and welding. Directly buried pipe compensators are generally welded (except trench installation)
Thermal deformation calculation formula of pipe: X=a•L•△T
x The pipe expansion a is the linear expansion coefficient, which is 0.0133mm/m
L compensation pipeline (required to compensate for the distance between fixed pipe supports) length ΔT for temperature difference (medium temperature - ambient temperature during installation)
Compensator installation and use requirements 1, the compensator should be checked before installation, its model, specifications and pipeline configuration, must meet the design requirements.
2. For the compensator with inner sleeve, care should be taken to ensure that the direction of the inner sleeve is the same as the direction of flow of the medium. The hinge plane of the hinge-type compensator should be consistent with the displacement plane of rotation.
3, need to be "cold tight" compensator, auxiliary components used in pre-deformation should be removed after the installation of the pipeline.
4. It is strictly forbidden to use corrugated compensator deformation method to adjust the installation of pipelines to be out of tolerance so as not to affect the normal function of the compensator, reduce the service life, and increase the load of piping, equipment, and support components.
5. In the installation process, welding slag is not allowed to splash on the surface of the wave shell, and the wave shell is not allowed to be subjected to other mechanical damage.
6. After installing the piping system, remove the yellow auxiliary positioning components and fasteners used for installation and transportation on the corrugated compensator as soon as possible, and adjust the position limiting device to the specified position according to the design requirements so that the piping system has the environmental conditions. Full compensation ability.
7. All moving elements of the compensator shall not be jammed or restricted by the external components. The normal movement of the active parts shall be ensured.
8. In the hydrostatic test, the secondary fixed pipe frame equipped with the end of the compensator pipe should be reinforced so that the pipeline does not move or rotate. For the compensator used in gas media and its connecting pipe, pay attention to whether it is necessary to add a temporary support when filling water. The 96 chloride ion content of the hydrostatic test water washing solution does not exceed 25 PPM.
9. After the hydrostatic test is completed, the water in the shell should be drained as soon as possible and the inner surface of the shell should be blown dry quickly.
10. The insulation material in contact with the compensator bellows should not contain chlorine