Directly buried (fully buried) expansion joints have good self-sealing protection performance and are equipped with limiting devices. They can be buried directly underground without the need for wells. More than one compensator is allowed to be installed in the main fixed pipe frame to reduce the need for split compensation. The passenger frame has good guiding performance, is easy to construct and install, has low investment, does not require maintenance, and has certain economic and social benefits. Model type
Expansion joint standard
Standard number/ (new standard/)
Expansion joint standard name General technical conditions for metal bellows expansion joint
Standard implementation date (new standard implementation date)
Promulgated by the State Administration of Quality and Technical Supervision
Content Introduction This standard specifies the definition, classification, requirements, test methods, inspection rules, marking and packaging, transportation, storage, etc. of metal bellows expansion joints. This standard is applicable to the design, manufacture and inspection of circular expansion joints installed in pipelines whose flexible parts are integrally formed unreinforced, reinforced and corrugated pipes. The design, manufacture and inspection of expansion joints for pressure vessels can also be used as a reference.
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