Burn through: A nonstandard term for excessive melt through or a hole.
Melt-through: Visible root reinforcement produced in a joint welded from one side.
As CKP rightly stated one is desirable and the other is as defect
Cause for Burn through is Excessive heat input. Prevent by Reducing heat input by increasing travel speed, use of a heat sink, or by reducing welding parameters.
From:
Sent: Thursday, February 12, 2009 10:25 AM
To:
Subject: [MW:1555] Re: 1553] Re: burn through
hi
realy ,melt through is excessive penetration?
best regard
From: Chaitanya Purohit <
To:
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 -
HP No. : 6016-3376448
From:
Sent: Thursday, February 12, 2009 5:07 AM
To:
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:
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
</html
***DISCLAIMER NOTICE ***
"This email and any files transmitted with it is confidential and is intended only for the use of the recepient(s) named above. If you are not the intended recipient, any review, retransmission, dissemination, distribution, printing, copying or use the information contained in this message or any part thereof in other manner is strictly prohibited. If you receive this email in error, please notify the sender immediately by return email and delete the email and any of its attachments. Any personal views or opinions expressed by the sender shall be understood as neither given nor endorsed by KNM or any of the companies within the Group."
--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
-~----------~----~----~----~------~----~------~--~---
No comments:
Post a Comment