According to AWS 3.0 - 2001 pag 6:
melt-through or a hole through a root bead.burn-through. A nonstandard term when used for excessive
Dear Mr. Ali,
The communication is one of the more important skills required for welding inspectors, therefore always try to do it by standard terms (AWS 3.0).
According to "Design for Welding" by AWS - 2001, tubular connection could be CJP or PJP therefore, melt through has to be related to joint penetration.
AWS 3.0 figs 26, can be very helpfull for your purposes.
BR
From: ck@knm-group.com
To: materials-welding@googlegroups.com
Subject: [MW:1559] RE: 1555] Re: 1553] Re: burn through
Date: Thu, 12 Feb 2009 13:38:07 +0800
Dear Ali,
Its not excessive, it is just required "Penetration". Excessive penetration will fall under "weld defect"
Regards.
C. K. Purohit
General Manager - QC
KNM Process Systems Sdn Bhd - Malaysia
HP No. : 6016-3376448
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Ali Asghari
Sent: Thursday, February 12, 2009 12:55 PM
To: materials-welding@googlegroups.com
Subject: [MW:1555] Re: 1553] Re: burn through
hi
realy ,melt through is excessive penetration?
best regard
From: Chaitanya Purohit <ck@knm-group.com>
To: materials-welding@googlegroups.com
Sent: Thursday, February 12, 2009 8:05:17 AM
Subject: [MW:1554] RE: 1553] Re: burn through
I do not agree with the interpretation of term "Melt Through" with Mr. César.
Melt Through is not a synonym for burn through. "Burn through" is the type of defect where the "Melt through" is the desired property for good weld. Melt through is considered as "Penetration" which we use during welding inspection. There shall be full penetration (no lack of penetration –LOP) if you interpret AWS correctly.
As correctly said if can not be seen visually but generally in UT , interpreters are putting as "No LOP Observed" which complies to AWS requirement stated. I am not the expert is AWS D1.1 and I am sure there are people in group who can through some light on this issue.
Regards.
C. K. Purohit
General Manager - QC
KNM Process Systems Sdn Bhd - Malaysia
HP No. : 6016-3376448
From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of César Alexis Viteri Pérez
Sent: Thursday, February 12, 2009 5:07 AM
To: materials-welding@googlegroups.com
Subject: [MW:1553] Re: burn thrugh
Burn trough is a nonstandard term for melt through.
"melt-through.- Visible root reinforcement in a jointwelded from one side." - AWS 3.0
I'm not a structural eng but for tubular k,y,t conections where the inspection inside the pipe is difficult is preferrable guarantee full penetration and fusion, may be a structural could give us a better explanation.
BR
Date: Wed, 11 Feb 2009 04:11:46 -0800
From: asghariali@rocketmail.com
Subject: [MW:1550] burn thrugh
To: materials-welding@googlegroups.com
hi
melt through is excessive weld or burn through?
in aws d1.1 is written that"melt through is desirable in T,K,Y joint".(in 4.8.1).why?
thanks adv
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