copper boiler for 1/12 scale steam locomodtive

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F Wright
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copper boiler for 1/12 scale steam locomodtive

Post by F Wright » Mon May 17, 2021 12:20 pm

I would like to determine the age of a copper boiler that failed a hydrostatic proof test. This boiler was built before two safety valves was required. A header had been added to allow for two safety valves, so that it complied. MY question, when was the two safety valve requirement established in the USA? F Wright

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Bill Shields
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Re: copper boiler for 1/12 scale steam locomodtive

Post by Bill Shields » Mon May 17, 2021 4:52 pm

It varies from club to club and state to state if the state inspectors are involved

Where I run a 2.5" gauge loco they are ok with one valve...but on a 4.75" or 3.5" gauge they want two.
Too many things going on to bother listing them.

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Bill Shields
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Re: copper boiler for 1/12 scale steam locomodtive

Post by Bill Shields » Mon May 17, 2021 9:42 pm

Thinking about it...if it is a copper boiler that failed...it was probably built with sil phos solder and the joint failed...probably leaked like a leaky faucet. .

This stuff was commonly used in the 60-70's

I had a boiler in my possession built in the early 1980's with sil phos by a well known manufacturer who should have known better.

If you look closely enough, most boilers have a date and pressure stamped or etched in some where.
Too many things going on to bother listing them.

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