Fabric Expansion Joint Test Splice — The Expansion Joints Blog


Ensure-A-Splice Test Splice Instructions

March 11th, 2013 Comments off

Splicing of fabric expansion joints is a critical operation which needs to be performed correctly for the expansion joint splice to hold up under system operating conditions. ensureAsplice is the answer to assure that a splice is made correctly.

U.S. Bellows material is a thin, flexible, lightweight, PTFE material that clearly indicates when the proper conditions have been established for achieving a successful test splice on FLEXXCEL Fabric Expansion Joint materials. The U.S. Bellows material accomplishes this in two ways. First, a dramatic color change in the product during the splicing procedure ensures that the critical sealing temperature has been reached in the splice area. In addition, the material bonds to the expansion joint’s PTFE surface, confirming that sufficient pressure was applied during the splicing operation.

The sealing process requires that all splice components be assembled between the heat sealer and the product. As the splice heats up, the U.S. Bellows product changes from a light shade of red to a much darker shade of the red. The easily observed color change can only take place after the splice components have reached the critical sealing temperature required for PTFE products. If sufficient pressure has been applied as the color change occurs, the product will adhere to the expansion joint’s PTFE surface, confirming that the proper splicing conditions were achieved.

A successfully completed test splice utilizing the ensureAsplice material will ensure that the variables that exist during a field splice have been accounted for. The actual splice on the expansion joint can now be completed with confidence.

Variables to consider:

  1. Ambient conditions
  2. Length of extension cord
  3. Acceptable voltage
  4. Proper “backer board” usage
  5. Heat Seal Iron in good working condition
  6. Allow iron time to reach required temperature
  7. Be sure the green light is illuminated
  8. Proper amount of time used to splice
  9. Proper amount of pressure applied during splice
  10. Follow U.S. Bellows splice procedures

Items used to produce a test spliceShown are the items required to produce a test splice with the product
(Heat seal iron, backer board, FLEXXCEL belting material, PFA heat sealing film, ensureAsplice product, stapler, scissors, blade knife, tape measurer, marking pen)

2. Begin by placing the product on the “Backer Board” surface.¬†Product being placed on backer board surface

3. Overlap the 2 pieces of FLEXXCEL belt material. The overlap should be the same width as the PFA Film. Make sure the PFA film is residing between the two belt ends in the overlap splice area. Staple the PFA Film in place.


View the full instructions at: http://www.usbellows.com/fabric-catalog/ensureasplice.html


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