Pressure plant

• Pages: 178-185

18. Pressure plant

18.1. Steam boilers

18.1.1. Official regulations as regards the materials, design,

construction, inspection and testing of steam boilers should be

laid down.

18.1.2. Oniy competent persons should operate steam boilers.

18.1.3. Boiler feed water should be clean and free from foreign

substances.

18.1.4. Steam should not be allowed to leak from the water

column or its connections.

18.1.5. Boiler installations, especially gauges, should be well

lighted.

18.1.6. The maximum working pressure should be marked in

a distinctive colour on the pressure gauge.

18.1.7. The space around a boiler should be kept clear of

obstructions and rubbish.

18.1.8. Boilers should preferably not be installed out of doors

in cold countries.

18.1.9. Water should not be fed into a hot empty boiler.

18.1.10. If the water level is low the fire should be damped

down, the ash door closed and the fire doors left open.

18.1.11. If persistent foaming occurs the boiler should be

shut down.

18.1.12. Safety valves should operate freely at all times.

18.1.13. Water gauge glasses and water columns should be

blown out at frequent intervals during each shift to make sure that

all connections are clear.

18.1.14. Blow-off cocks should be opened and closed slowly

so as to avoid water hammer.

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