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Thread: Butt join copper steam pipes

12/12/2013 22:10:36

Howdy

I have never soldered copper pipes together before ( but I have built a steam engine ) , and I'm creating a low pressure flash boiler and need to join some coils of 1/4" OD copper pipe together in series.

Now it makes sense to me to use a sleeve to join the pipes together ( to strengthen the join ) but didnt know if this was essential.

I think temps could be up around 300-400 C when in operation

(1) Should I butt join two pipes without using a joining sleeve

(2) Will silver soldering handle the temps or do I need to use something else?

(3) What type of solder should I use? I assume silver solder but wasnt sure of what % silver i needed in the solder and what type of flux etc?

(4) Do I need to use mapp gas or can a normal butane torch get hot enough for this type of work?

Any thoughts appreciated.....

Cheers

Steve

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