Auxiliary Boiler (Oil-Fired) · Boilers
Alfa Laval Aalborg-OS-TCi-7.5-7bar oil-fired vertical steam boiler (oil-fired vertical steam boiler). Evaporation 7500 kg/h, design pressure 7 bar, heating surface 92 m2, weight 11000 kg. Vertical cylindrical design for marine auxiliary steam generation.
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| Feed water chemistry check | daily or each watch |
|---|---|
| Gauge glass blow-down | daily |
| Low-water alarm functional test | weekly |
| Safety valve lift test | per class requirements, typically annually |
| Burner nozzle cleaning/inspection | typically every 1000-2000 running hours - confirm against the manufacturer's schedule |
| Internal waterside/fireside inspection | annually or per the class continuous survey scheme for this boiler |
Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.
| Safety valve set-pressure drift | reseat or renew when drift exceeds the tolerance stated by class - commonly a few percent of set pressure - confirm against the boiler's own certificate |
|---|---|
| Waterside scale thickness | keep below the level stated in the maker's manual for this heating surface - even a thin layer measurably raises fireside metal temperature |
| Refractory throat wear | repair or renew before cracking penetrates toward the shell - assess at each internal survey |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Boilers are typically surveyed under a fixed or continuous survey scheme including internal inspection, hydraulic/pressure test, and safety valve accumulation test at intervals set by class; water treatment logs and safety valve lift records are commonly reviewed alongside the physical inspection.
Estimated lifetime: Not normally rated in running hours - auxiliary oil-fired boilers of this class commonly remain in service 20-25 years with sound feed water treatment and periodic pressure-part renewal; actual life depends heavily on water treatment quality and duty cycle rather than hours run.
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