What's in a boiler?
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John Ashworth
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What's in a boiler?
Photos and comments supplied by Nathan Berelowitz, August 2012
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- The tubes convey the heat generated in the firebox to the smokebox, while at the same time heating the water around them, much as an electric element in a kettle, thus generating steam which the locomotive uses to get in motion. The main pipe on the left upper is the main steam pipe, into which the steam collected in the dome, will travel to the superheater and onwards to the steam chest. Directly in front can be seen what are known as Baffle Plates. These plates are perforated and are situated directly under the clack box which enables the water to be fed into the boiler via the injectors. The cooler water entering is thus broken up and will heat faster and not create a huge loss of temperature.
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- Closer look at the Baffle Plate
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- Lying on my back looking up and into the dome of the locomotive area. My hat perches upon the main steam collector pipe, which will convey the steam onwards to the superheater header. Directly above but not clearly visible is a second collector pipe for steam to the turret by the cab, which provides the raw steam for operating the various auxiliary gear such as steam shaker, reverser, etc, via the control spindles in the cab.
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Brendon Anderson
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Re: What's in a boiler?
This view is of the inner firebox on USR 19D #2685.
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- The view looking the opposite way to Nathan's pictures. This is 19D 2685. The new flexible crown stays and rigid cross stays are quite clearly visible.
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Nathan Berelowitz
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Re: What's in a boiler?
Great to see boiler work is alive in the country. What do such stays cost and who manufactures?
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John Ashworth
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- Posts: 23606
- Joined: 24 Jan 2007, 14:38
- Location: Nairobi, Kenya
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Nathan Berelowitz
- Posts: 2196
- Joined: 25 Jan 2007, 14:17
- Location: Pretoria, South Africa
Re: What's in a boiler?
CLASS 24. 3664
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Brendon Anderson
- Posts: 124
- Joined: 03 Jun 2008, 14:55
Re: What's in a boiler?
The costs are in the region of R125 000 for the full job. That is for the flexible stays, seats and caps, the rigid cross stays and the housings for the cross stays. USR has a "friendly" contact that does the machining on a CNC lathe at reduced rates.
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Brendon Anderson
- Posts: 124
- Joined: 03 Jun 2008, 14:55
Re: What's in a boiler?
Forgot to mention that figure excludes the labour of the volunteers for the fitment. It has taken many many hours of having your teeth rattled out and fingers blistered raw with the pom pom gun to rivet they stays over inside the firebox!