Integrity issue 

A 10 inch section of pipework containing  hydrocarbons was suffering from internal corrosion with a minimum remaining wall thickness of 2.3 mm. The extent of  corrosion was such that a repair solution  was sought and therefore an engineered Futurewrap repair was  proposed. To reinstate the integrity of this  section of this 10 inch line, it was  proposed to use a Futurewrap Glass/HT  composite repair. 

Design  

The design of the Futurewrap Glass/HT repair was to strengthen the pipework. The design parameters were; pressure  51.1 bar, temperature 2000C, design lifetime 2 years. It was assumed that the  composite repair would share in the load  carrying along with the remaining wall  thickness of the steel pipework which at  the end of the repair lifetime was  assumed to be 1 mm. The design  resulted in a thickness of 13.3 mm (16 layers) of Futurewrap Glass/HT composite  repair with an axial length of 260 mm. 

Installation 

The installation steps are shown in the  photographs. The repair was applied off  ropes as the pipework is elevated. The  surface preparation was to ST3. Full  QA/QC measurements were made to  demonstrate that the Futurewrap repair  was applied in accordance with ISO  24817. 

Summary 

A 10 inch hydrocarbon line suffering internal corrosion was repaired using  Futurewrap Glass/HT composite repair.  The repair was completed within 5 days reinstating the integrity of the