what is some of the amprage settings you guys are are using to get full penetration on sch. 40 pipe? i'm setup at about 75-80 amps and pedal is full tilt, starts the puddle nicely but when finished weld looks dull and seems like to much heat is being used, but i am still not penetrating the back of the material. this is also w/ no filler, argon set at 17-20, still practicing controlling the puddle. any tips would be great. TIA.
Dennis

 

Are you beveling the pipe ?

 

yes pipe is beveled and prepped properly.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by denske &raquo;</TD></TR><TR><TD CLASS="quote">. this is also w/ no filler
Dennis</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by denske &raquo;</TD></TR><TR><TD CLASS="quote">yes pipe is beveled and prepped properly.</TD></TR></TABLE>

This doesnt add up. Are you trying to do a root pass with no filler and then a cover pass with filler?

 

yes correct ,i'm trying to get the amprage setting i need to penetrate both sides on sch. 40. i'm just practicing. what doesn't add up?

 

You should be gapping the pipe and doing a filler root pass.

 

from what i seen most welders leave a 1/16" gap between the bevels to get proper penetration..

maybe thats why

 

purge that ****... bevel it...weld it with a root pass. Go over it with a filler pass. Try lower amperage and slower.

 

everyone gave you viable solutions: gap it 1/16", lower your amps, and you should always use filler on your root pass. if you don't your weld will be very weak. the filler is what gives the weld strength when you are bonding 2 pieces together.

 

awesome, thanks for the tips guys. i'll try them out. i was always under the impression that it needed to be a tight fit up. man, i got alot to learn.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by denske &raquo;</TD></TR><TR><TD CLASS="quote">awesome, thanks for the tips guys. i'll try them out. i was always under the impression that it needed to be a tight fit up. man, i got alot to learn.</TD></TR></TABLE>
Tight fit up is for tubing not pipe (there is a differance) Good luck and post some progress pics.