The new technology for flange connections.
The QF method is a "cold” alternative to a welded flange, and the technology will within minutes establish a mechanically robust and pressure-tight connection between pipe and flange. The technology has been developed with support from Statoil ASA, and is tested and approved by Det Norske Veritas (DnV). The QF connection has several advantages compared to existing solutions:
- G"Cold” operation
No fire- or explosion hazard provides for a cost effective and safe operation. - QHSE
The QF operation is inherently pollution-free, and provides a method for immediate and permanent repair of leaks. - Efficiency
Fast and efficient operation, a 2” QF flange is connected in less than 60 seconds. - Metal - to - metal seal
No gaskets which can be affected by temperature or fluids. - Mobility
The QF equipment is mobile, a 2” hydraulic tool weighs approx. 7 kgs. - Compatibility
Quickflange utilizes standard ASME flanges. - Versatility
Quickflange can be utilized on both new and existing piping systems
The technology
The QF technology consists of a hydraulic tool combined with a modified ASME flange. The flange is machined in such a way that it slides onto the pipe, and the hydraulic tool extrudes the pipe into grooves machined internally in the flange. This process secures a metal-to -metal seal, giving a gas-tight and mechanically strong flange connection.
Testing & Qualification
The QF connection has been through a rigorous testing process, where mechanical strength and pressure integrity has been evaluated. The initial external testing has been carried out by DNV, who has developed a test procedure and related test load requirements based upon ASME B 31.3 and ASME B16.5 standards. This test procedure has been established to evaluate the mechanical strength of the QF coupling compared with the strength of the pipe itself. A complete report from DNV that approves the technology towards non critical systems is available from the company on request.
