SERVICES
GENERAL BOILER INSPECTIONS
A visual survey of the general Boiler condition, external casing, internal gas-side mechanical parts and auxiliary equipment. Readily accessible pressure part components are visually inspected. HISE recommends performing such a general inspection in addition to the basic inspections stipulated by local regulatory requirements.
Time frame requirement: 2 – 3 days Boiler accessibility.
In order to prevent forced outages, periodic inspections should be conducted during scheduled outages. This allows the identification of component damage in the earliest stages – when there is still time to schedule a cost-effective repair.
HISE recommends a general inspection every 1 to 2 years and a more detailed inspection every 3 to 5 years. In order to optimize the overall plant availability, it is important to align these inspections with those of the gas turbine. Therefore, the detailed inspection should coincide with a gas turbine planned outage, e.g. the major or hot gas path inspection.
ALIGNING BOILER INSPECTIONS FOR OPTIMIZED AVAILABILITY
DETAILED BOILER INSPECTIONS
Includes all the general inspection steps plus a more detailed visual inspection of all accessible pressure parts. This visual inspection will identify any areas of concern that require subsequent non-destructive examination (NDE) to be performed by HISE qualified NDE technician.
Time frame requirement: 4 – 6 days Boiler accessibility.
Detailed Inspections
Includes all the general inspection steps plus a more detailed visual inspection of all accessible pressure parts. This visual inspection will identify any areas of concern that require subsequent non-destructive examination (NDE) to be performed by HISE qualified NDE technician.
Time frame requirement: 4 – 6 days Boiler accessibility.
Pre-Outage
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Walk down and punch list report based on findings and interviews
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Thermographic survey to review casing and piping and identify leaks or faulty insulation
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Recommendation for specialist non-destructive examinations (NDE) tasks to be performed during the detailed Boiler inspection (NDE to be performed by a qualified NDE technician)
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Outage planning support
Engineering Fabrication and Construction
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Supervision of repair or installation works
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Visual inspection of Desuperheaters, blow down system, deaerator and valves
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Review of any critical indications from the NDE inspections carried out during the detailed Boiler inspection
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Documentation and evaluation of the inspection results, using OEM lifetime information management system database for efficient Boiler condition optimization
Post-Outage
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Walk down to identify start-up problems