Quest Integrity was requested to perform a piping stress analysis and remaining life assessment of the HP, NOx, IP and LP steam high energy piping (HEP) systems at a Co-Generation Power Station.
A refinery client requested Quest Integrity to undertake a review of their asset integrity management processes and to identify opportunities for improvement.
Quest Integrity has developed a protocol for hydrostatic test exemption that includes finite element stress analysis, material testing and fracture mechanics assessment in accordance with API 579/ASME FFS-1.
Following several pressure equipment integrity related incidents that resulted in the release of hydrocarbon vapor, Quest Integrity experts were engaged to undertake a comprehensive review of process corrosion threats and mitigations to optimize unit operation and integrity.
Accurate and timely assessment of hydropower plant components is critical for the development of a long-term reliability management plan.
During a routine inspection of an Ohau A G5 generator, a crack was identified in the 5th rotor arm. Further investigation revealed 3 more cracks within the same arm.
Charpy tests and defect assessments of the Piripaua penstock were conducted to determine the maximum tolerable flaw sizes for the avoidance of failure during an overload situation.
During the late 1980s, leakage was discovered in the headcover (see Figure 1) of a 30MW Francis Turbine operating in water with large amounts of pumice sand. According to Mighty River Power, these erosive conditions damaged the turbine headcover.
Hydro Tasmania Power Station operates six horizontal shaft hydro- turbine generators each with two Pelton wheel runners installed. Quest Reliability LLC was hired to perform a stress analysis, critical crack size computations and a vibration analysis on a shaft at the Tarraleah Power Station.
Quest Integrity performed a Condition Assessment on an HRSG unit at a power plant in Australia. This power plant has three similar HRSGs which drive a 60 MW steam turbine.