GrahamH

GrahamH club

Posted: 30 May 2024


Taken: 30 Apr 2024

8 favorites     12 comments    183 visits

1/17 f/2.2 3.0 mm ISO 640

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australia
locomotive
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qld
toowoomba


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Fusible Plugs 20240430 09 58 23 Pro

Fusible Plugs  20240430 09 58 23 Pro
These are components of a steam locomotive boiler. They are called fusible plugs. They are screwed into the area of the boiler above the fire where under normal operation they are covered with water. They comprise a gunmetal bolt which is hollow through the thread and with a small hole in the head. The hollow region is filled with lead. If the water level drops in the boiler below the operational level the lead melts. This then causes steam and water to spray onto the fire which extinguishes the fire and so prevents the boiler from damage by overheating. These two are being changed out as part of the annual boiler inspection. Reconditioned ones have replaced them. April 2024.

Ernest CH, SV1XV, Peter_Private_Box, William Sutherland and 4 other people have particularly liked this photo


12 comments - The latest ones
 tiabunna
tiabunna club
Interesting information, Graham.
5 months ago.
GrahamH club has replied to tiabunna club
Thanks George, I'm glad to be able to inform.
5 months ago.
 Don Sutherland
Don Sutherland club
Great macro shot and information.
5 months ago.
GrahamH club has replied to Don Sutherland club
Thanks Don, I was surprised the photo worked. They are on a ledge of the loco's tender inside the workshop so not much light.
5 months ago.
 William Sutherland
William Sutherland club
Superb shot!
5 months ago.
GrahamH club has replied to William Sutherland club
Thanks William.
5 months ago.
 Loose_Grip/Pete
Loose_Grip/Pete club
Simple but effective - plugs and photo!
5 months ago.
GrahamH club has replied to Loose_Grip/Pete club
Thanks Pete.
5 months ago.
 Peter_Private_Box
Peter_Private_Box club
Hi Graham
A wonderful and interesting picture, which I like very much!
Simple composition.
In practice, there is never enough water to extinguish the fire, but the noise and steam blowing into the firebox should draw sufficient attention to the problem.
Best Wishes, a nice weekend, and stay safe!!
Peter
5 months ago.
GrahamH club has replied to Peter_Private_Box club
Thanks Peter, I hope never to find out exactly how well it works...
5 months ago.
 Gillian Everett
Gillian Everett club
Interesting to know.
5 months ago.
GrahamH club has replied to Gillian Everett club
Thanks Gillian, there many curious/interesting components in steam locos.
5 months ago.

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