Weld Porosity

[inthefrey]

How much argon flow do you have?

The puddle should be frozen pretty much as soon as you move.

Using approximately 15CFH - acording to the gauge that came with the PP 205, about 7.5 (CFH x 0.472). Too much? Not enough?

[Buggy Chief]

Using approximately 15CFH - acording to the gauge that came with the PP 205, about 7.5 (CFH x 0.472). Too much? Not enough?

I have the PP205 too and sounds reasonable, especially with your pre and post flow settings. I agree with CGINC, try a larger cup with a gas saver lens. In my opinion it concentrates the argon in a more consistent manner. Once I did this, I was able to dial the argon flow back to 5 lpm and used pre and post flow accordingly.

[inthefrey]

Well, I may have figured it out.

I believe I have found my smoking gun.....Guess what kind of hose I replaced my old hose with because I thought I was getting a good deal?! They were only $9.99 for a 25' length!

http://forum.weldingtipsandtricks.co...php?f=5&t=1022

Fixed the link. I dunno?!


I guess I'll be at HD tomorrow - spending some money on new tank lines. Going to give it a try and see what happens.

[DaveO]

I get an error when I click that link... what happened? The hose failed on you?

[Brian Ski]

I get an error when I click that link... what happened? The hose failed on you?

I found the thread...

http://forum.weldingtipsandtricks.co...php?f=5&t=1022

Crappy hose...

Interesting. The link gets altered... Try this if the above link does not work. Might have to cut and paste it.

//forum.weldingtipsandtricks.com/viewtopic.php?f=5&t=1022

[inthefrey]

I found the thread...

http://forum.weldingtipsandtricks.co...php?f=5&t=1022

Crappy hose...

Interesting. The link gets altered... Try this if the above link does not work. Might have to cut and paste it.

//forum.weldingtipsandtricks.com/viewtopic.php?f=5&t=1022

So, according to the info above, the cheap lines are bleeding chems, gases or whatever into the argon. I'll be replacing the lines tonight. I'll let everyone know if it helped or cured the problem.

[zoama]

So, according to the info above, the cheap lines are bleeding chems, gases or whatever into the argon. I'll be replacing the lines tonight. I'll let everyone know if it helped or cured the problem.

Are your hoses polyethelyne (thin simi-rigid) or PVC (similar to rubber air hose) ? I use PVC air hose with no problems. The clear braided hose that comes with the welders is also PVC.

[JBnID]

Tubing is sometimes tough because the heated air inside will blow out through the puddle.
Argon is heavier than air--when welding up tubing, try to have the open end of the tube up. Before welding the joint, trip the torch with the post flow set on 20 seconds or so and fill the tube with argon, then weld. If the tubing has to be open end down, always stuff a paper towel in the bottom to kill the 'chimney' effect that blows air on the back side of the puddle.