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.

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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.

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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

  • Walk down and punch list report based on findings and interviews

  • Thermographic survey to review casing and piping and identify leaks or faulty insulation

  • 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)

  • Outage planning support

Engineering Fabrication and Construction

  • Supervision of repair or installation works

  • Visual inspection of Desuperheaters, blow down system, deaerator and valves

  • Review of any critical indications from the NDE inspections carried out during the detailed Boiler inspection

  • Documentation and evaluation of the inspection results, using OEM lifetime information management system database for efficient Boiler condition optimization

Post-Outage

  • Walk down to identify start-up problems