Basic Terminology and Procedure?

[c.Gross]

First off I'd like to say Hi and that I hope I can ask my questions and receive answers to them without being belittled. I've been "welding" for about 3 years now and it was something that I picked up at work and have found a love for. I skipped ARC and MIG and jumped straight into TIG and feel as though i do an alright job. Of course if money weren't so tight I'd go to school but alas that isn't the case.

I'd like to know what a "hot pass" is. When welding to pieces of aluminum together (which is the primary medium I weld) do you always need to have a gap? If not, then what circumstances would you want to have a gap when welding. I also watch TikTok videos and have heard the term "push in" when referring to ARC welding. What is that and what is it's purpose? I do appreciate anyone that gives me the slightest amount of their time to help me better myself. So, thanks in advance. I do plan to learn the other welding types but I want to get TIG down before I move on.

[Weld_]

I am not the best at explaining and I'm sure others will chime in. But here we go.

A hot pass is something you put down over a root pass ( I assume you know what this is since you did not ask). The purpose of which is to reinforce the root and get things ready for a "fill pass".

You don't need to always have a gap when welding aluminum. Since you asked a very broad question this is a very broad answer.

[c.Gross]

An answer is still an answer and helps me understand the terms that I'm hearing. Thank you.

[smithdoor]

You find there is a lots of slang on the internet.
Try dingle barriers this is slang I even had in books.

I been welding since the 1960's and there lot of slang in welding industry.

Dave

First off I'd like to say Hi and that I hope I can ask my questions and receive answers to them without being belittled. I've been "welding" for about 3 years now and it was something that I picked up at work and have found a love for. I skipped ARC and MIG and jumped straight into TIG and feel as though i do an alright job. Of course if money weren't so tight I'd go to school but alas that isn't the case.

I'd like to know what a "hot pass" is. When welding to pieces of aluminum together (which is the primary medium I weld) do you always need to have a gap? If not, then what circumstances would you want to have a gap when welding. I also watch TikTok videos and have heard the term "push in" when referring to ARC welding. What is that and what is it's purpose? I do appreciate anyone that gives me the slightest amount of their time to help me better myself. So, thanks in advance. I do plan to learn the other welding types but I want to get TIG down before I move on.

[c.Gross]

Welding splatter?

[Louie1961]

Hot pass is really a pipe welding term more than anything. It has to do with a second, and maybe a third, pass over a root as Weld said. But this pass is usually done at a higher amperage and is done to reshape and reinforce the root, as well as to to burn off any slag/wagon tracks that didn't get removed from the root pass.

[smithdoor]

I think welding splatter is more descriptive that dingle berries.
I remove welding splatter with a leaf spring.

Dave

Welding splatter?

[milomilo]

Go to welding tips and tricks on YT. Jody provides lots of good info on many welding processes.

[LtBadd]

Louie is correct concerning the hot pass, it refers to pipe welding

For typical aluminum welding you won't use a gap, but as stated you asked a very broad question.
If your doing work for a customer then just follow their provided print, otherwise if it's for yourself
you probably don't need a gap.

If you have a specific question about something you are building then post back with photo's and you'll get
specific answers.

Welcome to the forum.

>>Go to welding tips and tricks on YT +1

[Sberry]

There is the **** hair,,, red and blonde, every welder needs a pecker. The chokers have aholes in them.

[Sberry]

Best slag hammer ever is a hatchet.

[Willie B]

I'll disagree that a hot pass is always pipe. I feel the application is most often pipe, but thick steel butt welds are prepared about the same with pipe or flat plate. If prepared as a 37.5 degree bevel from both pieces, with a land (cut perpendicular) then spaced with an open root.

Whether it is welded root pass with TIG, stick, (I've never heard of MIG open root, but I see no reason not to.), the root pass is done in line. Either stich & pause, or tight weave, melting one side then the other.

Next pass, once the root has been welded closed is the hot pass. It isn't necessarily increased amperage, but no risk it'll burn through. Hot pass is often a narrow weave if vertical.

[Louie1961]

I'll disagree that a hot pass is always pipe. I feel the application is most often pipe, but thick steel butt welds are prepared about the same with pipe or flat plate. If prepared as a 37.5 degree bevel from both pieces, with a land (cut perpendicular) then spaced with an open root.

Whether it is welded root pass with TIG, stick, (I've never heard of MIG open root, but I see no reason not to.), the root pass is done in line. Either stich & pause, or tight weave, melting one side then the other.

Next pass, once the root has been welded closed is the hot pass. It isn't necessarily increased amperage, but no risk it'll burn through. Hot pass is often a narrow weave if vertical.

I never said "always"

[vwguy3]

Spatter.

[Jack Ryan]

As a matter of interest, the AWS implies that "hot pass" is slang.

hot pass, pipe. A nonstandard term when used for the weld pass subsequent to the root pass.

It appears to have been added to the Standard Welding Terms and Definitions in 2001.

Jack