Expansion Joints

Penflex designs and manufactures metal bellows and expansion joints in an effort to offer a broad range of flexible piping solutions to customers across industries.

Key Features of Penflex Expansion Joints

  • Multi-ply bellows for maximum cycle life under stringent conditions
  • Bellow material: 304, 316L, 321, Inconel® 625, 600 & 825, Hastelloy® C-22 & C-276, Monel® 400
  • Pipe sizes of 2-1/2” through 30,” with tooling up to 120” available
  • Designed per EJMA, B31.3 or B31.1 specifications
  • Various attachments available: Fixed Flanges, Floating Flanges (Vanstone), RF Flanges, Weld Nipples
  • Universal and Pressure Balanced Joints are available
  • Pump Connectors 3”ND to 12”ND in stock
  • Various materials in stock for a quick response and lead time
  • Structural welding is in accordance to ASME Section IX
  • Markets served: Steel Mills, Power Generation, Engine Exhaust, Heat Exchangers, Petrochemical, Pulp & Paper, Ship Building, Fuel Cells, Chemical Processing and Waste Water
  • NDE available: Pressure Testing, Liquid Penetrant Testing, Fluorescent Penetrant Testing and Radiography

Contact Us with Your Specific Expansion Joint Needs

When to Use an Expansion Joint

Some applications lend themselves to either a metal hose or to an expansion joint, but more often than not, there is a preferred option. A few key application criteria let us know when to use an expansion joint instead of a hose. These criteria are listed below, but for further reading, please see this engineering bulletin.

  • Axial Movement
  • Vibration Damping
  • Exotic Material Requirements
  • Space Limitations
  • Size Requirements

Sometimes the answer may not be so clear, and rather than deciding between an expansion joint and hose, the ideal solution may be a combination of the two.

Download our expansion joint catalog to learn more or for an overview on expansion joints, watch our 40-minute introductory webinar.

Expansion Joint Photo Gallery