pipe square

Date 08-20-2007 23:01

following the 3,4,5 rule, marking a pipe with an "el" connection, level the two lines and scrape a mark on the top side of the pipes at 2X and 3X the advance of the el, (for an example, a 8" pipe-24" and 36" mark, leaving the head of the measuring tape in contact with the el and top and bottom tacks in place), measure half diameters on both marks and the space between set to 5X the advance = 60"
Just to leave it clear instead of measuring 3 and 4, you measure 2 and 3 taking advantage of the measurement given with the el lined up, adjusting the lines to a square.

Attachment: howtosquareapipe.bmp (960k)

By dschlotz (***)

Date 08-27-2007 23:52 Edited 08-29-2007 11:19

Sounds as if it could be a neat trick if I could follow what you are trying to show.

Dennis

By thomasyyz (**)

Date 08-31-2007 19:23

post edited to include attachment.
I measure from the lines marked in red :).

By dschlotz (***)

Date 09-01-2007 22:02

I like it. It's just the tried and true 345 rule. I never thought of using it up off of the flat on a pipe. That opens up all kinds of possibilities. Any triangle can be used in the same fashion. You can build any angle if you know two sides.

Thanks for the new wrinkle

Dennis

By mooseye (**)

Date 10-09-2007 14:30

Did I miss something?, when the takeout of an 8"sch40 standard 90 is 12"?

By Aspirate (**)

Date 10-09-2007 20:09

errr? That is the biggest run-on sentence, but I get it. Under what conditions would you have to use it?
Most fitters have a square & big framing square. They lay one edge of the square on the 1st pipe,
and measure for equal distance between the other edge & the 2nd pipe.

mooseye,
that is correct (12" takeout on 90 degree Long Radius WeldELL for 8" pipe).
If it was short raduis, it'll be the same as the pipe diameter.

By Kix

Date 10-10-2007 15:05 Edited 10-10-2007 15:09

INstead of doing 3-4-5 just measure out off the center of the 90 the same distance lets say 10'' both ways and multiply that by 1.414 and the distance between your 2 marks for the hypotenuse of the triangle would be 14 and 1/8 inches or 14.14 just move the decimal over 1 place. Problem is laying out center of pipe with a tri sqaure or a level takes time and it may be quicker just to use your square like you mentioned. I like the crooked eye approach myself.;-)