Quartering pipe welds

[Tim]

I seen in a welding text book where after you tack weld your pipes together (beveling six inch pipe then tacking it for instanct)
you start at the six oclock position and go up one side of the pipe up to the top then start at the six oclock position and go to the top of the pipe on the other side.
I was taught in school that after you tack weld the beveled pipe up you "Quarter" the welds. Start at the six oclock position and weld up to like the nine oclock position and stop. then on the other side of the pipe start at three oclock and weld up to the noon position. then go to the other side, start at nine oclock then weld up to high noon (I just call it high noon) then go back to the other side and weld from the six oclock position to the three oclock position.
does it matter how you do it?
Thanks
Tim

[boilerman]

i personally quarter weld as you said you was taught in school .....i find that things stay straighter that way ....if you weld the one side all the way as the weld cools it pulls...

[Stu Bass]

quartering welds

Tim: The reason some people do this is to prevent thier gap from closing and dog legging the joint. Possibly breaking the other tachs to. Alot of things to take into consideration. Is your bevel a sharp edge or blunted? Tight gap or loose? lots more just a couple things. Just rember if you tach at 3,6,9,12 stop your weld before or after the tachs this will smooth out the inside. always weld through the tachs and over lap the top. If you stagger weld the coupon feather both sides of the tachs and at all stops. A little hint, if you have a heavy tach when you weld through it don't add wire, add wire if it is light though. Stu

[rangerod]

Quatering Pipe

Stu Bass

Are you talking TIG welding when you say not to add wire if it is a heavy tack Would you not have to add filler metals in any of the other processes to weld through the heavy tack

[Guest]

Re: Quatering Pipe

Originally posted by rangerod
Stu Bass

Are you talking TIG welding when you say not to add wire if it is a heavy tack Would you not have to add filler metals in any of the other processes to weld through the heavy tack

Correct...the weld consumes the tack, The filler IS the tack.

[Stu Bass]

Re: Quatering Pipe

Originally posted by rangerod
Stu Bass

Are you talking TIG welding when you say not to add wire if it is a heavy tack Would you not have to add filler metals in any of the other processes to weld through the heavy tack

Rangerrod: Yes, sorry late at night brain dead. I ment the tig process. No need to add wire on a heavy tack.Wash the little white dot right thru the tack and slow down.It will suck up a portion of the tack.With practice you can get pretty good at it. On a thin tack change your tortch angle more perpendicualar to the weld and use the dip motionwith the rod.It will push more metal inside. On mig I've welded open root up and down. When down when down there's not to much you can do about heavy tacks other than cutting with a waffer wheel. On up hand the same. If tack is light thin it real thin and blow right thru on both procedures. When it is thin you might have to change your gun angle to pointing up a little bit on vert down. On up you might have to pull a little. Just comes with practice. Rember to feather all starts & stops and overlap the 12 o'clock position. Stu

[rangerod]

Quartering Pipe

Stu Bass

Thanks for the reply & clarification

[Stu Bass]

Re: Quartering Pipe

Originally posted by rangerod
Stu Bass

Thanks for the reply & clarification

Rangerrod: Your're welcome. Hope it helps. I really like this sight especially when there is lots going on with welding and projects. Stu