Flexible Connections & Expansion Joints

Flexible connections should be used on all fittings into and out of PE Storage tanks. This safeguards against leakage and stress over time.

  • Seismic Expansion Joints
  • Rubber Bellows
  • Painted, Zinc, Galvanised or Stainless Backing Rings
  • Threaded, Table D, E, ANSI.


Code Description
Flexible Connections & Expansion Joints

Seismic restraints add another layer of safety by acting as a set of anchors for large industrial storage tanks. A series of restraints around the tank's base are bolted into a concrete pad to hold the tank in place and prevent movement during an earthquake or other events, including cyclones and floods. A poly tank set solid and immovable at the base, and with flexibility and durability throughout the rest of the structure, appeals as the safest and most robust option for liquid storage.  Click here to learn more about Seismic restraints.