Large diameter copper tube

[Roger ClarkParticipant @rogerclark]

Does anyone know of the best price for 7.25" copper tube about 30" long and would 1/8" be strong enough for a loco boiler?

[Roger ClarkParticipant @rogerclark]

[Dave HalfordParticipant @davehalford22513]

try Blackgates, but 71/4" pipe may not exist which may leave you with design issues.

Fizzy on here makes boilers

[Thor 🇳🇴Participant @thor]

M-Machine lists 7" C106 tube in their metals catalogue, have you asked them for a price?

Thor

Edited By Thor on 11/08/2017 13:47:31

[Roger ClarkParticipant @rogerclark]

Posted by Thor on 11/08/2017 13:44:42:

M-Machine lists 7" C106 tube in their metals catalogue, have you asked them for a price?

Thor

Edited By Thor on 11/08/2017 13:47:31

Thanks Thor, query sent.

[D.A.GodleyParticipant @d-a-godley]

Try P&P Non-Ferrous Metals tel 01384 868080 . They a have a large range of tube and I found their prices quite reasonable .

I have no connection other than being a satisfied customer .

[duncan webster 1Participant @duncanwebster1]

7.25" * 10 swg should be OK at 100 psi, but discuss with your club boiler inspector before committing a large amount of money. If you intend to operate in public you will need insurance, and the best way is to join a ME club and use their's. Sounds like this isn't a standard design or you wouldn't be asking the question.

[nigel jones 5Participant @nigeljones5]

pressure no problem but I dont know of anyone who sells this size …might need it rolled

[nigel jones 5Participant @nigeljones5]

blackgates stock 6" then 8 1/4"

[Brian JohnParticipant @brianjohn93961]

What is large diameter copper pipe of that size usually used for ?

[JasonBModerator @jasonb]

Posted by Brian John on 12/08/2017 05:53:51:

What is large diameter copper pipe of that size usually used for ?

There is a clue in the question:

Does anyone know of the best price for 7.25" copper tube about 30" long and would 1/8" be strong enough for a loco boiler?

It is just a larger version of the copper tube you use for your models Brian.

[Mike PooleParticipant @mikepoole82104]

I am sure it is not manufactured to satisfy the demand from the model market, it must have uses in the industrial and scientific equipment market but I can't say I have seen it used.

Mike

[Ian S CParticipant @iansc]

7.25" isn't available here, the size goes from 6" to 8", and then 10" 12". There seems to be nothing in NZ that is near 7", and I think the range of sizes held by my local supplier would be fairly international, so you may need to roll your own.

Ian S C

[Nicholas FarrParticipant @nicholasfarr14254]

Posted by Brian John on 12/08/2017 05:53:51:

What is large diameter copper pipe of that size usually used for ?

Hi, I have a short piece of 4" copper pipe that came from a canning factory, which no longer exists, which I believe carried water for food processing. I dare say that larger sizes were also used and I suspect many food factories had large copper pipes at one time, and maybe even Whisky producers would use such sizes.

Regards Nick.

[Ian S CParticipant @iansc]

Been having a look around, and you may find 180 mm dia copper tube, the place I looked had a minimum order of 500kg, but someone must have 30 inches of it.

Ian S C

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