Extra key points for viewers to recognize: 1) That brush that he used to clean (very important for weld integrity reasons) is of the same metal as the parent & filler material, i.e. Stainless Steel (regardless of the SS family, austenitic, ferritic, martensitic, duplex) 2) From what I see, he is using a Laywire (for the cap pass) hand vs a dip hand. 3) Since the Cap Pass requires a larger filler rod, it also requires more Amperage; keep that in mind for your heat control and utility power. 4) I (as you all are as well, I assume) am unfamiliar with these CO2 systems, and don't know where this trend will end, but if it means moving towards actual welding vs hard brazing, then this is going to be a labor problem; I forecast.
Something interesting I noticed. He didn't use a back purge. I've always been under the impression that stainless should always have a back purge on root passes because it will pit really bad when exposed to oxygen while welding.
Well, then, it’s a fun hobby. Unfortunately they’ve taken welding and metal classes out of junior high schools and high schools mostly around the United States.. The only reason we have a trade shortage is because the trades were taken out of our middle schools junior high schools in high schools . Children should be learning this .
![ILLSLICK - KILLSHOT REMIX [FULL VERSION]](http://i.ytimg.com/vi/RIK8RrqIAzE/mqdefault.jpg)
Extra key points for viewers to recognize:
1) That brush that he used to clean (very important for weld integrity reasons) is of the same metal as the parent & filler material, i.e. Stainless Steel (regardless of the SS family, austenitic, ferritic, martensitic, duplex)
2) From what I see, he is using a Laywire (for the cap pass) hand vs a dip hand.
3) Since the Cap Pass requires a larger filler rod, it also requires more Amperage; keep that in mind for your heat control and utility power.
4) I (as you all are as well, I assume) am unfamiliar with these CO2 systems, and don't know where this trend will end, but if it means moving towards actual welding vs hard brazing, then this is going to be a labor problem; I forecast.
@MR-backup thank you very much for sharing these critical tips. It is much apprectiate from the Refrigeration Mentor team.
That wobbling motion he did is called "walking the cup".
Thank you for sharing that. I have never heard of that before.
Something interesting I noticed. He didn't use a back purge. I've always been under the impression that stainless should always have a back purge on root passes because it will pit really bad when exposed to oxygen while welding.
Well, then, it’s a fun hobby. Unfortunately they’ve taken welding and metal classes out of junior high schools and high schools mostly around the United States..
The only reason we have a trade shortage is because the trades were taken out of our middle schools junior high schools in high schools .
Children should be learning this .
That is unfortunate. We do need more trades in schools.