Auxiliary Boiler (Oil-Fired) · Boilers
Alfa Laval Aalborg-XS-TC1-7bar compact exhaust gas economizer (compact exhaust gas economizer). Evaporation 600 kg/h, design pressure 7 bar, heating surface 18 m2, weight 2100 kg. Compact, vertically-mounted exhaust-gas waste heat boiler.
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| Class internal/external survey | external typically annual, internal per class periodical scheme (often every 2.5-5 years depending on notation) |
|---|---|
| Safety valve testing | annually or per class requirement |
| Gas-side soot blowing/cleaning | condition-based on backpressure rise, commonly every 500-1,000 running hours |
| Water treatment/blowdown chemistry check | weekly to monthly |
| Feedwater/boiler water sampling | weekly |
Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.
| Gas-side tube wall thickness | condition-based renewal, commonly when wastage approaches roughly 20-30% of original thickness - confirm against the maker's/class minimum table |
|---|
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Covered under the class Boiler Survey requirements - internal/external examination, safety valve accumulation/lifting test, and confirmation of feedwater treatment records; where integrated with the exhaust system, the soot-fire prevention arrangement is also checked at survey.
Estimated lifetime: Compact exhaust gas economiser/auxiliary boiler units of this class commonly remain in service 15-25 years with proper water treatment and tube maintenance; individual tube bundles may need earlier renewal depending on fouling and corrosion history.
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