Crude Oil Riser of a leading Malaysian oil company Project: Crude Oil Risers Location: Semarang Platform, Offshore Sabah, Malaysia. Applicator: Eastern Energy Services Sdn Bhd Date Of Application: March 2000 The Challenge: CRUDE Oil risers on board Semarang Platform had a leak on the risers & were temporarily sealed with clamp & Class G cement. The area of the riser from the splash Zone to app 5 meters above were severely corroded due to the constant exposure to the moist Salt laden atmosphere, Conventional repair & maintenance could not be carried out due to the operating temperature of 90 deg. C & the presence of moisture due to tidal & wave movement which hinders in the application of conventional Patching system. Requirement: Ø Repair rectification to be carried out in a very short planned shut down & not to exceed 24 hrs Ø System Specified to be able to seal the leak & be able to withstand an operating pressure of minimum 800 psi, Ø All corroded areas to be rebuilt & protected up to a depth of 1.5 meters from the lowest tide level & to a total height of 7 meters System Specification: 1. Leaks Ø Prepare surface to ST 2/3 standards Ø Seal leak with a temporary plug Ø Seal Temporary plug & surrounding areas with Corro-Dur 911, a 5 min surface tolerant epoxy Ø Apply a coat of Corro-Dur 561 to even the surface & to distribute the load & wrap with Corro-Wrap A water activated wrapping composite system to the no of required wraps to withstand 800 psi operating pressure Ø Finish with 1 coat of Corro-Dur 258 2.) General Corroded area & splash Zone area Ø Prepare surface to St2/3 standards Ø Apply Corro-Dur 561 onto the pitted areas until even Ø Apply a second coat of Corro-Dur 561 to a minimum of 500 microns Ø Finish with Corro-Dur 258 to a minimum of 300 microns Conclusion: The above exercise was completed in 12 hrs & allowed to cure for another 8 hrs before being put back into operation.