Soft plug: Difference between revisions
Jump to navigation
Jump to search
| (2 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
[[Category:Steam Locomotive Parts]] | |||
A [[Soft plug|soft plug]], or [[Fusible plug|fusible plug]], is a safety device for boilers. Installed in the crown sheet, the low temperature alloy melts if the sheet becomes overheated due to low water. It blows out and extinguishes the fire. | A [[Soft plug|soft plug]], or [[Fusible plug|fusible plug]], is a safety device for boilers. Installed in the crown sheet, the low temperature alloy melts if the sheet becomes overheated due to low water. It blows out and extinguishes the fire. | ||
| Line 5: | Line 6: | ||
[[Ben Nixon]] wrote the following in the "The Smoke Stack", <i>Niagara Frontier Live Steamers</i>, 1 December 1996: | [[Ben Nixon]] wrote the following in the "The Smoke Stack", <i>Niagara Frontier Live Steamers</i>, 1 December 1996: | ||
: A Crown Sheet Soft Plug to protect live steam boilers. Build up an area to 1/4" or 3/8" and drill and tap for a 1/8" brass pipe plug. Modify plug as shown and soft solder copper rivet in place. Install plug | : A Crown Sheet Soft Plug to protect live steam boilers. Build up an area to 1/4" or 3/8" and drill and tap for a 1/8" brass pipe plug. Modify plug as shown and soft solder copper rivet in place. Install plug and test for leaks. | ||
and test for leaks. | |||
: If crown sheet becomes dry immediate temperature increase will melt solder and the remaining water in boiler will gently steam fire out with no damage to boiler. | : If crown sheet becomes dry immediate temperature increase will melt solder and the remaining water in boiler will gently steam fire out with no damage to boiler. | ||
| Line 16: | Line 16: | ||
* [https://en.wikipedia.org/wiki/Fusible_plug "Fusible plug", <i>Wikipedia</i>] | * [https://en.wikipedia.org/wiki/Fusible_plug "Fusible plug", <i>Wikipedia</i>] | ||
* [http://www.fingerlakeslivesteamers.org/work/splug.htm "Crown Sheet Soft Plug", Ben Nixon] | * [http://www.fingerlakeslivesteamers.org/work/splug.htm "Crown Sheet Soft Plug", Ben Nixon] | ||
* [https://www.chaski.org/homemachinist/viewtopic.php?f=8&t=106846 "Fusible Plug Thoughts", <i>Chaski.org</i>] | |||
Latest revision as of 11:29, 5 June 2018
A soft plug, or fusible plug, is a safety device for boilers. Installed in the crown sheet, the low temperature alloy melts if the sheet becomes overheated due to low water. It blows out and extinguishes the fire.
Ben Nixon style
Ben Nixon wrote the following in the "The Smoke Stack", Niagara Frontier Live Steamers, 1 December 1996:
- A Crown Sheet Soft Plug to protect live steam boilers. Build up an area to 1/4" or 3/8" and drill and tap for a 1/8" brass pipe plug. Modify plug as shown and soft solder copper rivet in place. Install plug and test for leaks.
- If crown sheet becomes dry immediate temperature increase will melt solder and the remaining water in boiler will gently steam fire out with no damage to boiler.
