Aflex Metal Expansion joint installation instructions

Congratulations! You are about to install a quality Australian manufactured expansion joint. Follow these steps to get started.

  • Before starting the installation process, please verify that the Aflex Serial number plate is securely attached and legible. It’s imperative that the Serial number plate remains attached and accessible in order to maintain positive identification of the bellows assembly. Removing the serial number plate will void the manufacturer’s warranty.
  • Verify that the expansion joint is in good condition and free from any damage. In particular, this means checking the bellows element itself, the hardware and shipping bars. Sometimes the hardware or shipping bars will be taking a preset load, and transit damage could mean the length of the joint has changed. Please notify your supplier immediately if shipping damage is apparent. Any attempt to rectify damage without consultation with the manufacturer will void warranty.
  • Ensure that shipping bars (where fitted) are not removed prior to installation. If a shipping bar is causing an installation problem, contact us for advice.
  • Ensure the gap in the pipe work where the expansion joint is to be installed is the correct size. The pipe work must be made to fit the length and alignment of the joint (unless otherwise specified in the datasheet).
  • Always use lifting lugs where provided, or otherwise lift from the hardware parts of the expansion joint. Do not support the weight of the expansion joint from the bellows element itself or from the shipping bars – this can cause damage which will void warranty.
  • Ensure that expansion joints fitted with flow liners are installed in the correct orientation. Flow direction is indicated on the shipping bar stickers.
  • Ensure any mating flanges are correctly and accurately aligned. Expansion joints subjected to high torsion stresses will fail prematurely, and failure due to torsion is not covered by our warranty.
  • Once the expansion joint is installed, (whether by bolting or welding) removed the shipping bars. Shipping bars are not designed to restrain pressure thrust and must be removed before site hydro-testing or system pressurisation.
  • Under no circumstances pressurise the expansion joint to a pressure higher than the ‘Design Pressure’ as listed on the expansion joint datasheet.
  • Ensure any tie rods and other hardware not labelled as shipping bars are installed prior to service. The hardware configuration as delivered from the manufacturer is correct (unless otherwise stated). Deviations or modification will void warranty.
  • If you have any problems or questions during installation – contact us immediately. We’re here to help, and your feedback is important!