Tuesday, 11 February 2014

Boiler Inspection

On Monday the Marshall Boiler received her annual inspection. This requires it to be drained down, all the mud holes and inspection plates to be removed as well as all the firebars and fusible plugs from the firebox. A good wash out is done to get rid of any sludge from the bottom. 

Having climbed into the firebox the inspector taps every stay with a hammer to hear if any have cracked. He looks in all the opened holes to check the general condition of stays, fire tubes and other structural components. After a quick cup of tea he gives it the all clear with only a couple of minor items to sort before the next test. Now that's done everything has to be put back together with new seals and tested for leaks. It will then be fired up for a steam test where the safety valves will be checked to ensure they blow off at the required pressure (50psi) and that the gauge is reading correctly, water sight gauges work etc. 

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