Saddle cut overlays for pipe

By jwright650 (*****)

Date 04-01-2014 19:22

Scott, I'm posting that link to the tips and tricks forum...neat tool to have on hand.

By jwright650 (*****)

Date 04-01-2014 19:24

http://www.aws.org/cgi-bin/mwf/topic_show.pl?tid=33348

By marktski (**)

Date 04-01-2014 19:40

I did a web search and came across the same recommendation. I did the same thing, I ran it and printed it both off the browser and as a PDF.
I cut them out and laid them on the part my welder had been laying out for the last hour plus. We were both amazed. This is going in my tool-
box of tricks. Thanks for the tip!

By SCOTTN

Date 04-01-2014 20:02

Thanks John. I was going to post it there but I got sidetracked here at work. I hate it when that happens.

By Superflux (****)

Date 04-02-2014 10:31

Just remember that the O.D. of Nominal Pipe sizes are different than Tubing sizes.
For instance, 3 and 4 inch pipe are 3.5 and 4.5 inches OD respectively.
So if I were doing your OP with 2" sch 40 (0.154 wall thk) on to a 4" header, I entered in 2.3" and the 0.154 wall with 4.5" and it did calculate it.

Not too much of an issue on small bore but gets to be a problem over 2" NPS.

By SCOTTN

Date 04-02-2014 13:28

The length of a wraparound is always based on the o.d., which is pi x the outside diameter of the pipe. The nominal sizes of standard pipe (A53) are i.d.'s, not o.d.'s. That is not the case with round HSS (A500). A round HSS 3 is 3" o.d., and a round HSS 4 is 4" o.d., so, if HSS round are being used, the o.d. must be entered.

By Tommyjoking (****)

Date 04-05-2014 03:14

Here is a few use at your own risk..

http://www.pipesaddlelayout.com/ I have hand laid out a few of these on small pipe and they were good.

http://www.harderwoods.com/pipetemplate.php

http://digitalpipefitter.com/

I have purchased some online for my phone and they are a dang lie just like the pipefitters bluebook...12 on 12 90 off by over an inch on some measurements so....check however you can. Avoid the apps by Lucky three on pipefittercalculator.com I have been using them and all the apps so far (rolling offsets, fitting cutdowns and branches) are highly flawed.