COMPOSITE PREPREG SOLUTION FOR COATED PIPE PROTECTION & REINFORCEMENT
|DEFECT TYPE||External corrosion|
|DETAILS||11 points of corrosion, 8inch buried gas pipe, 40bars pressure, max operating temp. 35°C|
|LOCATION||Pertamina Gas Sumatra, Indonesia|
The objective of the repairs, carried out by 3X ENGINEERING (3X) local distributor SINCERITY ENERGY, was to reinforce 11 areas of 8″ buried gas pipe suffering from external corrosion. To restore the mechanical integrity of the pipe and prevent further corrosion, it was decided to install REINFORCEKiT® 1D (R1D) product.
SCOPE OF WORK
According to ASME PCC-2 standard and 3X design calculations, it was decided to apply R1D composite solution (3X water activated composite system dedicated to protect and reinforce your pipe). Four layers were determined to reinforce the straight gas line over approx. 2,20 meters total length.
Surface preparation was performed using Bristle Blaster® machine to get a good surface cleanliness roughness (superior to 60µm Rz) and ensure a good bonding between the steel pipe and the composite repairs. Hygrometric conditions were checked and the surfaces were cleaned with acetone.
The composite wrapping repairs were then completed following below stages (installation procedure is the same for the 11 areas to be reinforced).
1/ F3X8 filler was used to reshape the corroded areas of the pipe. P3X1 primer was then applied on the whole prepared areas.
2/ Once the “Dry Touch” was reached, composite wrapping was completed applying 4 layers of R1D for each corroded area. To do so, this water activated composite system was wrapped around the corroded areas spraying water continuously.
3/ Compression film was then rolled all over the wrappings and slightly pierced using perforating tool (spiked roller). Any trapped CO2 gas bubbles could thus evacuate to get optimal repair laminate quality.
This project was quite complicated because of many COVID restrictions, but our local partner SINCERITY ENERGY delivered a great job by completing several reinforcements using our REINFORCEKiT® 1D.