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Inspections
Inspections
HRSG Inspections
Over time, plant performance naturally degrades and 90% of installed plants have opportunities for performance improvement. Vogt Power International (VPI) inspectors are trained to find these opportunities by identifying parasitic losses within your HRSG and balance of plant.
Inspection for Cycling Effects
Equipment maintenance cost can be high for “Peaking” HRSG’s if not properly designed and operation limitations are not considered. Cycling costs can be lowered by changing design and start-up procedures.
Options to improve the HRSG’s ability to withstand the demands of cycling.
- Economizer feedwater recirculation systems
- Stack damper
- Auxiliary boiler
- Slower temperature ramp rates, within limits of emission requirements
- Startup procedures
- Economizer trickle feed
- Unit lay-up systems
- Automated startup vent and drain valves
Life-affecting failure mechanisms that are exacerbated by cycling:
- Low-cycle fatigue
- Creep
- Thermal shock
- Differential expansion
- Corrosion fatigue
- Flow-accelerated corrosion
- Underdeposit corrosion
- Erosion
Annual Inspections
Vogt Power offers an annual inspection to assess the general condition of the HRSG, its life expectancy and potential problems.
Benefits of Frequent Inspections:
Your HRSG can last for 30 years as they have few moving parts to cause wear, but obtaining the desired life out of any major piece of equipment requires continuous conditional assessment. Proper maintenance increases reliability, life expectancy, and protects your investment. The biggest advantage in annual inspections is in detecting potential problems and planning for outages.
Base Inspection:
- External inspection
- Gas side inspection
- Water side inspection
- Spot UT test on riser tubes and drum internals
- Additional options
- Comprehensive UT test
- Borescope of critical components of the HRSG
- Tube sample analysis
- Metallurgical test — microstructure analysis
- Hardness test
What we look at:
- Expansion joints
- Pipe penetrations
- Ductwork
- Stack
- Insulation
- Drums
- Burner
- Risers
- Catalysts
- Deaerators
- Fin condition
- Feedwater systems
- Tube condition
- Valves
- Pipe supports
- Instrumentation
- Operating conditions
- Heat tracing
You will receive a report on the findings including recommendations and items that need prompt attention.
- Life assessment
- Guidelines to improve remaining life
- Recommendations in operating processes
- Retrofit options
- Advice on hot and cold starts
- Failure analysis
- Corrosion erosion analysis
Warranty Inspections for Competitor Units
We recommend having an inspection done before the end of the warranty period. This inspection will identify all the warranty-related problems before your warranty expires.
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