A weldless connection with no hot work
The Quickflange flange is slid over the pipe end and activated with a cold-forging tool. There is no spark or heat generated in the activation process, which takes up to 15 minutes to complete for the largest sizes (12 inch) and far less for smaller sizes. The flange design is very simple with a pure metal-to-metal seal, and no moving parts, balls, springs, seals or gaskets.
A strong mechanical connection
The cold-forging tool forces the pipe wall into the grooves and this simultaneously affects the seal and grip on the pipe.
The assembled joint is stronger than the flange itself and is energised by the natural relaxation “springback” of the deformed pipe material which is forced into the groove modification in the flanges. It further clamps-down on to the plastically-dilated pipe after its own elastic expansion during the activation process. These two processes generate huge contact pressures, forming a seal and structural grip on the pipe.
Resistant to corrosion
The issue of crevice corrosion is dealt with through the application of Belzona, a 2-part epoxy paste which sets-hard to a metal-like consistency. Testing has proved this to be a suitable protection against (unproven) threats of crevice corrosion. The same testing has shows that Quickflange is no-more susceptible to corrosion inside or outside the pipe than a welded weld-neck flange would be.