Exactly adapted to FRP stub flanges

* Exact adjustment of the backing rings to

* FRP stub flanges

* High chemical resistance

* Glass fibre reinforced PP outside layer

* High mechanical strength because of the steel core

* Proven application with thermoplastic piping systems since years

* Perfect harmonized flange connection with AGRU ePTFE seal clean gasket         

The problem with flange connections (stub flange with backing ring) is that the backing ring (designed for thermoplastic stub flanges) does not fit to the FRP stub end (d3 size).

AGRU has now included backing rings up to OD 630 mm to the product range to solve this problem. The special backing rings are exactly adjusted to the FRP stub flanges and provide the perfect solution for this connection.