Expansion joints are also called expansion joints, or bellows compensators habitually. They are used to use the effective expansion and contraction of the elastic elements of the bellows compensator to absorb the dimensional changes of pipelines, ducts or containers due to thermal expansion and contraction. A compensation device belongs to a compensation element. It can absorb axial, lateral, and angular displacement, and is used to absorb vibration and reduce noise in heating displacement and mechanical displacement of pipelines, equipment and systems.
Expansion joint standard:
1. Standard number: GB/T 12777-2008
Expansion joint standard name: general technical conditions for metal bellows expansion joints
Standard implementation date: 2009-02-01
Issuing department: National Bureau of Quality and Technical Supervision
Introduction: This standard specifies the definition, classification, requirements, test methods, inspection rules, marking and packaging, transportation and storage of metal bellows expansion joints. This standard applies to the design, manufacture and inspection of circular expansion joints installed in pipelines whose flexible parts are integrally formed unreinforced U-shaped, reinforced U-shaped and ∩-shaped corrugated pipes. The design, manufacture and inspection of expansion joints for pressure vessels can also be used as reference.
2. Standard number: GB16749-1997
Expansion joint standard name: pressure vessel wave expansion joint
Standard implementation date: 1997-08-01
Issuing department: National Bureau of Quality and Technical Supervision
Introduction: This standard specifies the design, manufacture, inspection, acceptance, storage, installation, basic parameters and dimensions of metal bellows expansion joints. It is suitable for reinforced single-layer or multi-layer U-shaped expansion joints for steel pressure vessels, steel shell-and-tube heat exchangers and atmospheric vessels. Pipeline expansion joints can be used as reference. This standard applies to the expansion joint, the design pressure is less than 6.4Mpa. The design temperature range is based on the allowable use range of steel.