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Expansion joints | High-end metal expansion joints (MEJ's)

STY Styrene
expansion joints
Einsatzbereich
Diameter: Up to 2,250 mm (90”)
Process temperature: Up to 900 °C (1,650 °F)
Pressure: Up to 6 bar (90 PSI)
Typical axial movement: ±50 mm (+/-2”)
Typical lateral movement: 50 mm (2”)
Typical angular movement: 5°

Movements are concurrent.

Werkstoffe
Merkmale
Heavy duty expansion joints for extremely
high temperature, high pressure and high
movement applications.
Used in styrene units.
Shell wall temperatures
up to about 900 °C (1,650 °F).

Vorteile
Reliable expansion joints in critical
applications.
Experience in styrene business.
Experience with Badger, Shaw Stone &
Webster, Technip styrene specifications.

Inconel© 800H restricted chemistry nickel
alloy is a typical bellows material.
Bellows basics: formed by punch mandrel,
thin-wall ply thickness ≤1.5 mm (0.060”).
Duct: 304H, 800H or 800HT, 12 ... 50 mm
(0.5 ... 2”).

Standards und Freigaben
B31.3 process piping
European Pressure Equipment Directive
(PED) 97/23/CE
Expansion Joint Manufacturers Association
(EJMA)
ISO 9001:2008

Empfohlene Anwendungen
Petrochemical industry
Refining technology
Chemical industry
Steam
Expansion joints in Styrene units with
extremely high temperatures.
Petrochemical applications with extremely
high process temperatures.
Any application with extremely high internal
temperatures.

Funktionsbeschreibung
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.

Hinweis
Standard quality control and testing:
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.
Hydrotest
Third-party inspection

Additional quality control and testing
options:
Ultrasound weld tests
Helium leak check
Impact testing of weld ends

Service:
Skilled field service teams can provide site
support.

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