The MNLC is an internally pressurized metal bellows expansion joint.  It is ideal for axial or angular movements.  The MNLC is a standardized product and is available off the shelf. Metraflex can also customize the MNLC to meet the customers’ requirements.

All in-line bellows expansion joints develop anchor loads and require guiding.  Refer to the Expansion Joint Design Guide or consult Metraflex or your local representative for more information.

• Available in both import and domestic models.
• Maximum Working Temperature 500⁰ F
• Maximum Working Pressure:
  • 50 lb. class      50 PSI
  • 150 lb. class    150 PSI
  • 300 lb. class     300 PSI (CONTACT METRAFLEX)
• Maximum Test Pressure:
  • 50 lb. class      75 PSI at 70⁰ F.
  • 150 lb. class    225 PSI at 70⁰ F.
  • 300 lb. class     450 PSI at 70⁰ F (CONTACT METRAFLEX) 
• The below options are available for the MNLC:
  • Liners for high velocity applications.
  • Tie rods to control hydrostatic end load when the line is not properly anchored.
  • Covers to protect the bellows from damage.
  • Flanges or weld ends.
  • Short or Long styles.
  •  Available with import or domestic materials
• End fitting options
  • Flanges:
  • 50 lb. class joints come standard with carbon steel plate flanges, 150# drilling.
  • 150 lb. class joints come standard with 150 lb. carbon steel flanges in accordance to ANSI B16.5
  • 300 lb. class joints  – Contact Metraflex
  • Custom options available.
  • Weld Ends:
  • Standard Weight A-106 carbon steel is standard.
  • Custom options available.