Penetration seal metal expansion joints
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Penetration seal metal expansion joints

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Penetration seal metal expansion joints
Penetration seal metal expansion joints
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Technical drawing of Penetration seal metal expansion joints

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

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

Penetration seal metal expansion joints

PDF data sheet

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).

Advantages

  • Improved boiler efficiency through zero gas seepage.
  • Improved boiler efficiency through reduced heat loss.
  • No emissions
  • Noise reduction

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.

Materials

  • Bellows material options: 1.4301(ANSI 304), 1.4404 (ANSI 316/L dual-certified), 1.4541 (ANSI 321), Inconel® 600, Inconel® 625, 254 SMO®, Incoloy® 25-6HN.
  • Bellows basics: formed by punch mandrel, thin-wall ply thickness ≤1.5 mm (0.060”).
  • Rings, bands: carbon steel, chrome-moly.
  • Metal covers: carbon steel, stainless steel.

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.

Similar products

AN Type expansion joints

AN Type
expansion joints

  • Tied custom metal expansion joints for general pressure applications.
  • Designed for, and cover the mid temperature and pressure range for general process equipment.
  • Mainly for angular movements.
  • Tied metal expansion joints retain pressure thrust developed by internal pressure, through the use of hardware.
AX Type expansion joints

AX Type
expansion joints

  • Untied custom metal expansion joints for general pressure applications.
  • Designed to cover the mid temperature and pressure range for general process equipment.
  • Mainly intended for axial movements.
  • Multiply bellows with low spring rate and high cycle life.
CB Clamshell metal expansion joints

CB Clamshell metal expansion joints

  • Bellows or expansion joints split into longitudinal segments for installation without opening pipework.
  • Temporary repair solution for damaged expansion joints.
  • Can handle axial, lateral and angular movements.
  • The permissible combination and magnitude of movements depends on the application and the existing expansion joint that is to be repaired.
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