Alpha Inspection Services - Multi-Flue

The majority of multiflue steel chimney stacks should be inspected at periods not exceeding 36 months, however high risk stacks should be inspected at periods not exceeding 24 months.

Frequent inspections by properly qualified personnel are imperative to identify at an early stage the defects associated with such stacks and the corrosive conditions in which they operate. Particular attention should be paid to the internal liners and stacks termination point. The results of these inspections allow for an early diagnosis of defects, from which a proactive maintenance programme can be established. This enables minimal operational disruption to the clients' production process and allows for repairs to be undertaken during planned shutdown periods without the need for costly imposed outages.

Alpha undertakes two main types of inspection processes on Multiflue steel chimney stacks dependent upon age and operating conditions. Annual NDT photographic visual examinations using steeplejack ladders and rope access equipment are recommended on stacks operating in hostile acidic environments.

Three yearly inspections are required on all multiflue steel stacks operating on gas processes considered to be low risk.

Methods used for undertaking Inspections on Multiflue Steel Chimney Stacks include:

  • Visual Photographic Surveys.
  • DVD Camera Surveys.
  • NDT Ultrasonic Testing.
  • Welded Joint Analysis.
  • Welded Joint Dye Testing.
  • MPI Flange Bolt Testing.
  • Emission Flow rate Calculations.
  • CCTV Internal Inspections.

Further to the inspection process, Alpha supply detailed structural reports on the condition of the stack along with the necessary repair specifications and costs involved. All reports are backed up with photographs of defects found during the inspection process, NDT drawings identifying areas of testing and readings obtained.

Certificates are supplied in relation to NDT readings obtained and Lightning Conductor Earth Testing.

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