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Up Topic American Welding Society Services / Technical Standards & Publications / D1.1 questions
- - By jb81 Date 06-26-2008 14:38
Need a little help with D1.1.  If a welder qualified on a 7/8 in. thick CJP groove test plate, is there a min. thickness for pipe that he is qualified to?  Also, is there a thickness limitation for repairs?
Parent - - By motgar (**) Date 06-26-2008 15:33 Edited 06-26-2008 15:53
Since the welder qualified on plate, then he/she could only weld on pipe equal to or greater than 24 inches in diameter with backing, backgouging, or both.
     Sub-note c of Table 4.10, AWS D1.1-2006

Minimum thickness would be 1/8" not only because of Table 4.11 but, also because of paragraph 1.2.1, limitations of the code.
    Initial plate was 7/8" thick.  Thickness range would be 1/8" to 2T(1 3/4").  Table 4.11

What type of repairs are you questioning?  Weld repairs or mill induced discontinuities that need repaired?
Parent - - By jb81 Date 06-26-2008 15:48 Edited 06-26-2008 17:26
i am having a hard time finding this in the code.  where do I find it?
Parent - By motgar (**) Date 06-26-2008 16:00
Tried to put where I found them.  Did you locate them yet to verify? 
Parent - - By Kix (****) Date 06-26-2008 16:01
He just told you all the tables you need to look at.  Review his post one more time and look up those tables. It's all in sec 4 Qualification. 
Parent - - By jb81 Date 06-26-2008 17:33
i have an 2004 D1.1 book, so that is why i could not find it.  the repairs that i am concerned with are weld repairs.
Parent - - By Kix (****) Date 06-26-2008 17:46
I'm not sure if Qualification is under a different section in D1.1(2004), but check the table of contents for Qualification, then look under it's tables.  This should tell you what you need to know about qualifying your welder.  There is also a section about repairs that you can find in the table of contents.
Parent - - By jrw159 (*****) Date 06-26-2008 17:59 Edited 06-26-2008 19:43
Now I could very well be mistaken, but if memory serves me correctly, section 4 has always been "Qualification" at least as long as I have been certified.

jrw159

EDIT: I certified to the 2002 edition and studied out of the 2000 edition so from 2000 forward is all I am familiar with. I am sorry if I misled anyone to think that section 4 has been qualification from day one.
Parent - - By CWI555 (*****) Date 06-26-2008 18:05
fyi

Section 4 in 75 ed was "technique" and 5 was qual through edition 92. I dont' have some of the intermediate ones, but some of the older hands may have a relapse and refer to it as section 5 for that reason.
Parent - - By jrw159 (*****) Date 06-26-2008 19:40
Yeah, LOL. I could probably have worded that better. I can really only speak about 2000 and up. I tested with 2002. BTW I was only 4 in 1975, so in a way I am still a pup, and did not mean for it to sound like I had dealt with every edition of D1.1 ever released, and after reading my own post, it could be construed this way. My apologies for that. :-)

jrw159
Parent - - By CWI555 (*****) Date 06-26-2008 20:07
In 75 I was 11. Only reason I know it is working nuclear. The code of record is required for a lot of pre-existing work. I collect old code books for that reason. I may only need a specific code book of whatever year once, but that one time pays off considerably more for having knowledge of and copies if required of the year code of record. You would think they would keep them around, but that is not always the case. Try finding a summer 73 B31.1 as an example.

Regards,
Gerald
Parent - By jrw159 (*****) Date 06-26-2008 20:12
Yeah, I bet that leads to some interesting "hunt's"  I can only imagine. :-)

jrw159
Parent - By CHGuilford (****) Date 06-28-2008 01:29
D1.1 was re-formatted in 1996.  That caused a great deal of confusion for a little while, especially since I worked equally with D1.5 which did not get re-formatted but stayed like the former D1.1.  Like anything, we all get used to changes after a while.
Parent - - By motgar (**) Date 06-26-2008 17:58
AWS D1.1-2004

Table 4.9 on page 140, still limits to pipe over 24 inches in diameter.  See note # 3.

Table 4.10 on page 141 gives the same thickness limitations.  Also paragraph 1.2.2 still sets minimum thickness at 1/8".

Weld repairs: check Section 5.26 on page 191.  Not sure what type of defects, I am assuming they have been deemed so, need to be repaired. 

Also keep in mind to check Table 4.11 on page 145.  Stay within welding personnel performance essential variable changes, or requalification shall be necassary.

Hope this helps.
Parent - By jb81 Date 06-26-2008 18:36
Thanks.  That helped out a lot. 
Up Topic American Welding Society Services / Technical Standards & Publications / D1.1 questions

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