6-G Pipe landing & Gap (what works for you?)

Info: 6" schedual 80 mild steel. 60deg included bevel angle, 1/8 landing.

6010 5p for the root. 3/32 lo-hy for the fillers/1/8 for the cap.

I'm using a gap thats slightly smaller than 1/8" and a landing thats a solid 1/8.

What I want to know is, what works for you?

Also is a two stringer hot pass common? My instructor had me running two for about a month, then had me switch back to one, which threw a wrench in the whole learning curve.

-Thanks

Reply to
Tony Pro
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Pipe tests I have done are with a 37.5 bevel both sides for a 75 degree opening. I like a 3/32 land and the gap just under 1/8th. I gap at 1/8 with 1/8 rod then let the tacks pull lit so that a 1/8th will not fit in. the gap. Using 3/32 is odd. Maybe there is a lot on hand and the instructor wants to use up old stock :')) It sounds like your instructor is getting you used to a variety of procedures. Welding is the only trade were you have to continually requalify throughout your career. The tests will always be a little different from what you are used to. The ability to adapt is a valuable skill. Randy

"Tony Pro" wrote in message news:1068190749.289942@prawn... Info: 6" schedual 80 mild steel. 60deg included bevel angle, 1/8 landing.

6010 5p for the root. 3/32 lo-hy for the fillers/1/8 for the cap.

I'm using a gap thats slightly smaller than 1/8" and a landing thats a solid 1/8.

What I want to know is, what works for you?

Also is a two stringer hot pass common? My instructor had me running two for about a month, then had me switch back to one, which threw a wrench in the whole learning curve.

-Thanks

Reply to
R. Zimmerman

[snip]

Really? And I thought us NDT people had to requalify also... OK, not as often as welders, but then most of the welders requalifications I come across just involves putting the welders name on the NDT report or getting the test pieces back out of the cupboard for the tenth time. It's normally only initial qualifications or for 'proper' jobs that a real witnessed test is called for.

I have to resit exams at an independent test centre every 5 years for my NDT qualifications.

Mike

Reply to
mb

I stand corrected.... Getting pieces back out of the cupboard is a scary thought .. but then I have seen all the plate intersections done by one welder then X-raying the intersections while all the hung over types do the remainder of the seams. Ethics has as much to do with welding and inspection as skill. Randy

[snip]

Really? And I thought us NDT people had to requalify also... OK, not as often as welders, but then most of the welders requalifications I come across just involves putting the welders name on the NDT report or getting the test pieces back out of the cupboard for the tenth time. It's normally only initial qualifications or for 'proper' jobs that a real witnessed test is called for.

I have to resit exams at an independent test centre every 5 years for my NDT qualifications.

Mike

Reply to
R. Zimmerman

That's illegal, and if you witness such behavior and take no action you are liable, morally if in no other way.

I weld transmittion pipelines, distribution lines, pumping stations and steel pilings and I test, on average, 18 to 25 times per year.

JTMcC.

Reply to
JTMcC

And, every production weld will see either an x-ray, a hydro, a UT or a combination of those, so the welder gets tested every time he strikes an arc.

JTMcC,.

Reply to
JTMcC

I put a disclaimer on reports saying that I have no evidence that the welder mentioned is the welder who welded the stuff - unless there is paperwork saying otherwise. As for the 'used' test pieces, again I have no evidence that they have been used before. If we get a load of test pieces into the X-ray shop, how can we see if they have been tested previously? We have suspicions but no proof.

These cases would only apply to welder qualification *extensions*. Weld procedure/qualifications are different as these are often also destructively tested (depends on job/client). Welding of these things should be witnessed by another independent authority - e.g. Lloyds, DNV, Bureau Veritas, Stoomwezen etc.

Mike

Reply to
mb

1/8" land and 1/8" space is pretty much thye standard. As I've said several times, if you expect to work in this field, you have to be able to deal regularly with poor fit up.

A 2 bead hot pass is unheard of in my experience, does the instructor have a pipe welding background? None of my partners in crime, who have more years of experience than I do, have heard of such a thing either.

JTMcC.

Reply to
JTMcC

New one on me too John !@!#$##$#$%

-- "Pay peanuts.....expect monkeys."

Reply to
jessp

I love the word "illegal" I wish it worked that way. For anyone other than the inspector to chose the location of a radiographic examination is asking for problems but it is done. I worked with a welder who discovered a set of plates welded up and marked with the special marker for radiographic examination. That X-ray had been done on the sample rather than on the icebreaker hull as required. When he pointed it out the plates were quickly destroyed and he was soon layed off. Whistle blowers are not protected in Canada. The latest story I heard was intersecting plates inside a tubular column. The plates were not welded before installation. Fortunately a suspicious inspector drilled a hole in the column and looked inside. The building, partially erected, was condemned. The fabricator is now out of business but if history repeats itself he will surface again under a new name. I have worked for this guy and he only buckles if you question the way he wants you to do the job and he realizes you know better. When I worked for him we did a complete job with 7/8 holes when the prints clearly required 13/16. The ironworkers must have liked it. When you have a family to support and a mortgage you learn to keep your mouth shut. Now that I am much older I can afford to change jobs leaving with a smile on my face. No need to make bad blood and get blacklisted. I take pleasure in getting a good job reference from a low life employer. Randy

"JTMcC" wrote in message news:e0Vqb.9108$ snipped-for-privacy@news02.roc.ny...

"mb" wrote in message news:3fabd476$0$5769$ snipped-for-privacy@morenews.zeelandnet.nl...

That's illegal, and if you witness such behavior and take no action you are liable, morally if in no other way.

I weld transmittion pipelines, distribution lines, pumping stations and steel pilings and I test, on average, 18 to 25 times per year.

JTMcC.

Reply to
R. Zimmerman

It does work that way in my little world, I don't use the word flippantly (?), ask the DOT (who maintains legal authority over interstate pipelines, or the state corperate comission (who maintain authority over in state pipelines in most parts of the U.S.) and they will gladly quote you the law being violated.

regards, JTMcC.

Reply to
JTMcC

I don't even see how it would be possible, you would have to wash up so high on the sides, trying to only catch one wagon track at a time????? and if you wandered to far across the middle, it would be impossible to catch the other track. Sounds like the instructor is not familiar with pipe welding, and sent you off on a wild one before he realized what was wrong. If you intend to weld pipe for a living you need to get into a more appropriate enviroment, IMO, where the folks know and understand the work. So as to save wasting more time.

JTMcC.

Reply to
JTMcC

Thats what I was exactly what I was told by my sis (10yrs pipe experience) When he had me switch back I wondered if he really wanted me to learn this. My instructor (when he worked in the field) and my sister worked together and had animosity between them( she took 2 jobs from him). Suffice it to say he's not really helping much, so any help apreciated..

Reply to
Tony Pro

Well reguardless of any instructor problems, or animosity, if you are really interested in learning to do it you will most likely succeed, in a stylish fashion. Every one hits varying levels of difficulties on the way to their goals, some just take it in stride and keep on truckin, some give up.

Good luck, JTMcC.

Reply to
JTMcC

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