Penetration seal metal expansion joints

These maintenance-free metal expansion joints provide an airtight solution to boiler penetration and permit axial and lateral movement without causing high stresses in penetration pipe and boiler wall.

Product Description

Features:
  • 100 % airtight solution to boiler penetration.
  • Permits axial and lateral movement without causing high stresses in penetration pipe and boiler wall.
  • Maintenance-free
  • Used in heat recovery steam generators (HRSGs).
Benefits:
  • Improved boiler efficiency through zero gas seepage.
  • Improved boiler efficiency through reduced heat loss.
  • No emissions
  • Noise reduction

Penetration seal (with telescopic covers option) area cross section.

ITEMDESCRIPTION
1Bellows
2Outside ring
3Inside ring
4Drain plug (optional)
5Cover ring (optional)
6Inside cover (optional)
7Outside cover (optional)
8Boiler wall*
9Penetration pipe*

* Shown for illustration only.

Technical Specifications

Operating range:

Diameter: 75 mm (3”) ... 750 mm (30”) bellows inside diameter
Process temperature: Up to 650 °C (1,200 °F)
Pressure: Up to 1 bar (15 PSI)
Typical axial movement limit: ±200 mm (±8”)
Typical lateral movement limit: 200 mm (8”)
Typical angular movement: 0°

Movements are non-concurrent.

Standards and approvals:
  • GE Specification
  • Expansion Joint Manufacturers Association (EJMA)
  • ISO 9001:2008
Recommended applications:
  • Power plant technology
  • Refining technology
  • HRSGs (heat recovery steam generators)
Functional description:

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.

Notes:
 

Standard quality control and testing:

  • Air and soap bubble leak check.


Service:

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