EXPANSION JOINTS FOR LNG/LPG

EXPANSION JOINTS FOR LNG/LPG

Due to the demanding design parameters and the critical consequences following a possible failure, the expansion joints used for such applications must meet stringent demands:

  • The design phase is rather complex as the design must meet both requirements in the classification Society Rules (e.g. Bureau Veritas) and the International Rules for Gas Carriers (IGC Code)
  • Every design has to pass a burst test of 5 times the design pressure, and the fatigue life of the expansion  joint must be verified
  • The mechanical properties of the materials used for the expansion joint must be verified through comprehensive testing, especially the strength and ductility of the materials
  • Every expansion joint has to pass a pressure test of 2 times the design pressure
  • Special requirements regarding welding procedures and consumables are also applicable

All of these tests and documentation must be witnessed and approved by a third party surveyor.


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