The installation, the largest Quickflange solution deployed in the North Sea to date (1st quarter 2012), was carried out by an engineering firm on behalf of the operator.
Corrosion occurred on the platform due to the existence of Sulphate Reducing Bacteria (SRB) in the water and hydrocarbons pools, formed at the low points of the Flare Header, with one of the low points being a 12" drain pocket which had suffered some corrosion.
It was deemed necessary to install additional low point drains along the flare header to enable all water/hydrocarbons to ‘free drain’ away and install a permanent drain for the 12" drain pocket.
Limited Access and No Hot Work
With the location of the required repairs in an area of limited access where no hot work was allowed, the 12” Quickflange solution, based around ‘cold’ operations involving pipe and flange connections, was considered the optimum solution by the engineering company.
A Rapid Installation!
Once the pipe was cut and cleaned, the Quickflange solution was applied to the pipe end with crevice corrosion protection and then tested with a flange weld tester. The entire activation and testing was completed comfortably within one shift.