saddle layout
saddle layout
(OP)
i have a small piping project involving several 90 deg. tee branches with 4 in. schedule 40 pipe. I have constructed a template with auto cad and transferred it to 1/16 in. garlock gasket mat'l. The template works great, but i was curious as to whether this technique is really practical, especially concerning the time it would take to construct a template without the aid of software. I'm certainly not a pipefitter by trade (a machinist actually), but i'm sure i've seen pipefitters at some time in the past laying out miters and such on pipe without the aid of a template. i know about dividing the circumference into 8 or more equally spaced segments and constructing lateral lines down the desired length, and then starting at a common line drawn around the diameter of the pipe, but i'm lost as to how to figure the distances to mark the lateral lines to construct a miter. i can't find any info in the two pipefitter handbooks i have or the internet. can anyone help a pipefitter wannabe?





RE: saddle layout
With both of these you have everything covered. Both show how to do what you want to do. Or, you can buy a book of ordinates that give you the numbers for everything imaginable.
Either way is an exercise in 1940's technology. Fabricating branches hasn't been practical for decades, and I don't work anywhere that will even allow a homemade branch put into service. Life is faster, easier, cheaper and simpler if you just buy fittings.
JTMcC.
RE: saddle layout
RE: saddle layout
When you mentioned a "piping project" and "pipefitters" I was led astray.
In my work, a 12" on 12" inverted branch welding test is common, some places require layout by hand, others allow a template. I've done probably 20 or so of these test's and even with a good set of numbers you still end up with a fair amount of grinding for a really good fit.
Of course you won't need the fitup required on a test.
Hopefully you won't find any of this info "useless" <g>.
regards,
JTMcC.
RE: saddle layout
You are so lucky that you get this...threads...
Can you fight back? wrong forum or something..
this forum is not parking lot stuff, is it?
ER