second pass welding

[ere1983]

hey guys, i have a 110V lincoln electric weld pak 3200HD mig/flux cored welder. I was reading the manual and it said it can do up to 5/16" steel but multiple passes will be needed. Can somebody explain to me how to know when you need to do multiple passes. Is there an special way to do this or do you simply go back over you original weld a second time?

[MAC702]

May I ask what you are building?

Multiple pass welding starts before you run the first bead. You have to prepare the joint with a suitable bevel for the application.

You must use a self-shielded FCAW wire that is rated for multipass welding to even HOPE to meet the manual's highly exaggerated claims.

You must clean the first pass of all slag and may even need to grind some out before you can run the next pass.

[arcflashlynn]

It is needed for the thicker materials. Depends on what you are building also. The ends need to be beveled (single or double depending on where and what it is for) then you put the root pass in clean it and follow a pattern of passes so the heat is displaced throughout the peice evenly... cleaning each pass so you dont get inclusions etc. if it mentions multiple pass welding the typically it will show you a pic of what one should look like/ and how to do it.

[worldsgreatestwelder]

Originally Posted by MAC702

May I ask what you are building?

Multiple pass welding starts before you run the first bead. You have to prepare the joint with a suitable bevel for the application.

You must use a self-shielded FCAW wire that is rated for multipass welding to even HOPE to meet the manual's highly exaggerated claims.

You must clean the first pass of all slag and may even need to grind some out before you can run the next pass.

Originally Posted by arcflashlynn

It is needed for the thicker materials. Depends on what you are building also. The ends need to be beveled (single or double depending on where and what it is for) then you put the root pass in clean it and follow a pattern of passes so the heat is displaced throughout the peice evenly... cleaning each pass so you dont get inclusions etc. if it mentions multiple pass welding the typically it will show you a pic of what one should look like/ and how to do it.

Well not so true on the requirement of beveling.

I would suggest you find your way to a book store or library and do some reading on welding.

welding starts before you run the first bead not judt multi pass but all welding should start this way have a plan don't just pull the trigger and hope it works out.



Operators manuals are guides for using the machine not to be substituted for welding education.

Learning to weld via the internet forums is ill advised.

Good luck
Jimmy

[worldsgreatestwelder]

Originally Posted by MAC702

May I ask what you are building?

Multiple pass welding starts before you run the first bead. You have to prepare the joint with a suitable bevel for the application.

You must use a self-shielded FCAW wire that is rated for multipass welding to even HOPE to meet the manual's highly exaggerated claims.

You must clean the first pass of all slag and may even need to grind some out before you can run the next pass.

Originally Posted by arcflashlynn

It is needed for the thicker materials. Depends on what you are building also. The ends need to be beveled (single or double depending on where and what it is for) then you put the root pass in clean it and follow a pattern of passes so the heat is displaced throughout the peice evenly... cleaning each pass so you dont get inclusions etc. if it mentions multiple pass welding the typically it will show you a pic of what one should look like/ and how to do it.

Well not so true on the requirement of beveling.

I would suggest you find your way to a book store or library and do some reading on welding.

welding starts before you run the first bead not just multi pass but all welding should start this way have a plan don't just pull the trigger and hope it works out.



Operators manuals are guides for using the machine not to be substituted for welding education.

Learning to weld via the internet forums is ill advised.

Good luck
Jimmy

[ironken]

Originally Posted by worldsgreatestwelder

Well not so true on the requirement of beveling.

I would suggest you find your way to a book store or library and do some reading on welding.

welding starts before you run the first bead not just multi pass but all welding should start this way have a plan don't just pull the trigger and hope it works out.



Operators manuals are guides for using the machine not to be substituted for welding education.

Learning to weld via the internet forums is ill advised.

Good luck
Jimmy

ahhh come on Jimmy, be easy on arcflash. She has umpteen degrees and, "knows what she's talking about." Not bad for 22 years old........

[worldsgreatestwelder]

Originally Posted by ironken

ahhh come on Jimmy, be easy on arcflash. She has umpteen degrees and, "knows what she's talking about." Not bad for 22 years old........

OOPS. Just an uneducated welder with 30+ on the job.

[qaqc]

for standard structural steel welding, the max size for a single pass weld are 1/2" for flat, 3/8" for horiz., 1/2" for vert, and 5/15" for overhead. Although your machine will difficulty with these sizes.

[arcflashlynn]

Originally Posted by worldsgreatestwelder

OOPS. Just an uneducated welder with 30+ on the job.

30 years on the job doesn't mean you're the greatest welder, despite your alias... but at least you can admit that you are UNEDUCATED.
Please, buddy you cannot scrutinize people for using the word need... it wasn't the word SHALL, perhaps you should get educated then post. perhaps after 30 years you should retire

[kc8yhk]

WOW what a complete @ss worldsgreatestwelder is

[arcflashlynn]

Originally Posted by kc8yhk

WOW what a complete @ss worldsgreatestwelder is

now there's a guy who knows what he's talking about. haha

[smithboy]

Originally Posted by ere1983

hey guys, i have a 110V lincoln electric weld pak 3200HD mig/flux cored welder. I was reading the manual and it said it can do up to 5/16" steel but multiple passes will be needed. Can somebody explain to me how to know when you need to do multiple passes. Is there an special way to do this or do you simply go back over you original weld a second time?

http://www.esabna.com/EUWeb/SA_handbook/585sa4_45.htm


ere1983,
Here is the basics of multipass welding for thicker materials...well, maybe a bit more than basics, but it gives you some idea what it is, even though yours isn't this thick. You don't always simply go over the weld. There is sometimes a stacking pattern involved, and it and other details differ somewhat depending on the required joint. The first link is for submerged welding...obviously not what you are doing, but it was the best picture I could find to give you a bit of an idea. I have accomplished 1/4" welds on mild steel using a 110v welder (MM130), but it was a real stretch for the machine...or me, maybe. Preheating the joint helps. Using higher amp welder would make this a lot simpler process. Getting by with a lower amp welder requires a bit more finesse. I think the reason folks are asking about what you're welding is because they want to make sure you aren't doing anything that might be a critical weld...The manufacturer's claims are probably based on optimal conditions, which might include a bunch of experience practicing that specific weld. It probably wouldn't hurt to practice with some scrap just to get an idea what you might be up against.

[6010]

Lynn,
I know whose brain I am going to be trying to pick now.

I have a question for you. When I worked at a paper mill we had pipe that had to be stress relieved and they used a machine with thermal blankets to do this. I was wondering if you could tell me how high the temperature had be and how long at temperature before they started dropping. I saw this done many times but never ask about the temperature. It wasn't until I retired from the paper mill that I took a keen interest in welding.

The pipe was on our digesters - 10 and 12 inch pipe carrying white liquor at 340 degree F at a PH of about 14. You can see why they thought it was so important that they get a good weld. I was wondering if you could go over this process with me. I didn't get into the welding too much because I was in Electronics/Instrumentation, although I had some welders that worked for me.
They didn't do the welding on these pipes though. There were only a couple on site that we trusted enough to do this job.

Thanks

Hope I am not hijacking the thread here.

[arcflashlynn]

so you dont hijack the thread i'll answer in a private message

[arcflashlynn]

you are the most immature person ever. I am 22 and have 6 years welding experience HANDS ON EXPERIENCE so don't think you know me. i could give a (s)hit about you frankly. people like you make people not want to comment or talk on here in fear that you will cut them down or tell them they aren't good enough. i AM a welder thank you.

[ironken]

Originally Posted by arcflashlynn

you are the most immature person ever. I am 22 and have 6 years welding experience HANDS ON EXPERIENCE so don't think you know me. i could give a (s)hit about you frankly. people like you make people not want to comment or talk on here in fear that you will cut them down or tell them they aren't good enough. i AM a welder thank you.

6 years isn't all that much.....looks like you are digging pretty deep to come up with 6 years at that! Heck, I struck my first arc when I was about 10...should I count that toward my years of experience? If I do, that puts me at 24 years of experience, but, reality sets in and I simply count years being full-time employed and doing it....I certified and began compensation at 21. See how easy that was. What you are getting is reaction from a couple of guys here that call bull**** on ya. You burst onto the scene here tossing out the 'ol, "I gotta degree," crap and spouting scripture from books. Maybe you should look at yourself and how you present yourself. I work with a few females. The gals that are humble are the ones that I trust to handle tasks and they do well. The females that come off like you do are the ones that wet the bed when it comes time to perform. You come here like you have something to prove.....you've shown your hand.

[worldsgreatestwelder]

Originally Posted by arcflashlynn

you are the most immature person ever. I am 22 and have 6 years welding experience HANDS ON EXPERIENCE so don't think you know me. i could give a (s)hit about you frankly. people like you make people not want to comment or talk on here in fear that you will cut them down or tell them they aren't good enough. i AM a welder thank you.

Miss. I don't know you I simply pointed out that you had either misspoke or misinformed another member. If you can not accept being corrected how the heck do you think you are going to survive in in this business, or life for that matter.

We all screw up the smart one admits it and takes responsibility, learns the error and moves on. You are too caught up in your emotions for your own good.

How you figure I am immature is beyond me I talk in calm rational tone, I define my perspective, I admit I am offering an opinion. You talk in definitives and absolutes.


Chill out kid you are only 22 still wet behind the ears, you do have valuable information stuck in that head you mouth is not letting us hear it.


Comment all you like I'll call BS on you or any one else I see misleading other members.

I don't know it all I am smart enough to know this are you?
Jimmy







If you were not engaged I would think you had a crush on me

[kc8yhk]

WOW!!! this thread went off topic QUICK

[worldsgreatestwelder]

Originally Posted by kc8yhk

WOW!!! this thread went off topic QUICK

Sorry all!

[daddy]

WooooHoooo! Internet fight!

Since I don't have anywhere near Jimmy's experience and qualifications, or Lynn's education, and am probably about half way between their ages, I deem myself qualified to comment here.

Lynn, If you are interested in rubbing people the wrong way and being self righteous, you are doing fine. If you want to earn the respect of forum members and help those less informed than you are, may I suggest a different tack? (That there's a boatin' word I looked up in my dicshunarry)

Jimmy, With due respect and deference to your years of experience and knowledge, may I humbly suggest that you go a bit easier on the kid? I agree on calling her out on any mistakes, but a bit more tact might keep the discussion civil and help the original poster more. She reminds me of my little sister, I feel obligated to stick up for her a bit

Have a drink on me...

[worldsgreatestwelder]

Originally Posted by daddy

WooooHoooo! Internet fight!

Since I don't have anywhere near Jimmy's experience and qualifications, or Lynn's education, and am probably about half way between their ages, I deem myself qualified to comment here.

Lynn, If you are interested in rubbing people the wrong way and being self righteous, you are doing fine. If you want to earn the respect of forum members and help those less informed than you are, may I suggest a different tack? (That there's a boatin' word I looked up in my dicshunarry)

Jimmy, With due respect and deference to your years of experience and knowledge, may I humbly suggest that you go a bit easier on the kid? I agree on calling her out on any mistakes, but a bit more tact might keep the discussion civil and help the original poster more. She reminds me of my little sister, I feel obligated to stick up for her a bit

Have a drink on me...

Well Daddy you are overqualified and thanks for speaking up.

As well your point is taken and will be implemented.
now as for that drink I think I will
Jimmy

[daddy]

Cheers!

[arcflashlynn]

i'm already drunk!haha As I cannot read this forum without feverishly drinking.