Copper tube question

[cessna]

Hi, I have purchased type L tubing for my boiler, do I need the same grade for the lines to and from the cylinders? It is a vertical 5" boiler with twin cylinders, the lines call for 3/16" and 1/4" copper running at 95 to 100 psi.
Thanks
Terry ???

 

[joe d]

Terry

Can't help with your question, but I'll ask one or two... this is for the Donkey engine? And, did you source this somewhere
here in Canada?

thanks, Joe

 

[cessna]

Yes it is for the Donkey engine by Harris. Not sure what your asking re source.
Terry

 

[joe d]

Hi Terry

source = where did you get the stuff ;D

The local plumbing supplier is happy to get me some as long as I want 20',
I would have to rob several banks....

cheers, Joe

 

[Stan]

3/16" or even 1/4" hard copper is not common. In soft copper I think the equivalent of Type L is Type K. That said, I don't think you would have a problem with common soft copper tubing in that small size. It is regularly used on air conditioning systems at 250 - 300 PSI.

While working in an instrument shop, an apprentice used 1/4" soft copper tubing on the dead weight tester (instead of steel) and had calibrated several 3000 PSI controllers before somebody noticed.

 

[GWRdriver]

I have purchased type L tubing for my boiler, do I need the same grade for the lines to and from the cylinders?

Terry,
I don't recall how its wall thickness compares with standard copper tube "type" but common ACR (refrigeration) tubing. either hard (straight) or soft (coiled) will be more than adequate.

 

[Dan Rowe]

Terry,
Check Mcmaster & Carr. They have both sizes. I checked 3/16" and there is a choice of 1000-2000 PSI and 2000 -3000 PSI so the wall thickness is usually chosen for threads or no threads.

Dan

 

[cessna]

Thank you for the replies, the type L I purchased for the boiler ( 5/8 ) I bought from the local Home Hardware, they will cut what ever length you need.
Terry