MGTX Gas turbine
metal expansion joints

MGTX Gas turbine <br/>
metal expansion joints For a larger view, please mouseover the image.
For a larger view, please mouseover the image.
Isometric view of typical MGTX MEJ with conic duct
(weather cover removed)

Item Description
1 Duct
2 Conic duct
3 Landing bar
4 Liner panel
5 Bellows cover
6 Lift lug
7 Outer cover clip
8 Spider (removable)
  • Heavy duty expansion joints for high temperature and high cycle applications.
  • Used in gas turbine exhaust systems.
  • Designed for frequent start/stop cycles.
  • Highly-engineered expansion joints.
  • Reliable operation in critical applications.
  • Experience with GE, Mitsubishi, Siemens specifications.
Diameter: Up to 4,250 mm (170”)
Process temperature: Up to 675 °C (1,250 °F)
Pressure: FV up to 3 bar (50 PSI)
Typical axial movement: ±38 mm (±1.5”)
Typical lateral movement: 6 mm (0.25”)
Typical angular movement: 0°

Movements are non-concurrent.
  • Bellows material: 321 stainless steel is a typical bellows material. Other materials on request.
  • Bellows basics: formed by punch mandrel, thin-wall ply thickness ≤1.5 mm (0.060”).
  • Hardware connections: 321 or 347 stainless steel are typical materials.
  • B31.1 power piping or B31.3 process piping
  • European Pressure Equipment Directive (PED) 97/23/CE
  • Expansion Joint Manufacturers Association (EJMA)
  • ISO 9001:2008
  • Oil and gas industry
  • Refining technology
  • Petrochemical industry
  • Chemical industry
  • Power plant technology
Metal expansion joints are used in pipelines to compensate for thermal growth, typically in applications with high internal temperatures; or to prevent vibrations from being transmitted beyond the expansion joint.
Quality control and testing options:
  • Full x-ray of bellows longitudinal seam weld before formation of convolutions.
  • Full dye penetrant test of bellows longitudinal seam weld inside and outside before and after forming of convolutions.
  • 100 % dye penetrant test of bellows attachment welds.
  • Pneumatic test
  • Third-party inspection
  • Ultrasound weld tests
  • Helium leak check
  • Impact testing of weld ends
  • Hardness test
  • Magnetic particle examination
  • Positive Material Identification

  • Skilled field service teams can provide site support for proper installation.
  • Experienced supervision by our field service personnel available.
  • Expert clamshell (split bellows, for in situ repair) bellows welders.