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Up Topic Welding Industry / Technical Discussions / the most difficult to weld in accordance with BS EN 287?
- - By hrezvany (*) Date 08-27-2009 11:30
Hi every one

which of the following butt welds would be considered the most difficult to weld in accordance with BS EN 287?

1. Single V butt
2. double V butt welded both side
3. single U butt with backing strip
4. assymetrical double V butt-welded both side
Parent - By Stephan (***) Date 08-27-2009 11:46
I guess this has a more universal character, but it's option 1.

Stephan
Parent - - By hrezvany (*) Date 08-31-2009 11:00
I found it!

1. Single V butt
Parent - - By Nanjing Date 08-31-2009 12:55
Real rocket science this one!
Parent - - By 3.2 Inspector (***) Date 08-31-2009 13:24
Which is why this thread has so few reply's

3.2
Parent - - By Shane Feder (****) Date 09-01-2009 02:31
All wrong guys,
There is no such thing as an "assymetrical" weld so that would be the hardest.LOL !
Sorry, couldn't resist.
Cheers,
Shane
Parent - By 3.2 Inspector (***) Date 09-01-2009 04:10
:)
Parent - - By hrezvany (*) Date 09-01-2009 06:16
With respect to answer which I got from a duty engineer in TWI the 1st is true.

The answer is as follow:

Table 8 of BS EN 287 indicates that welding a single-V butt weld without backing qualifies for welding any of the other butt weld joint configurations. From this, we can conclude that it is the most difficult.
Parent - By 3.2 Inspector (***) Date 09-01-2009 07:41
With respect to your welding knowledge, did you really need an answer from "TWI duty engineer" ?
Parent - - By kipman (***) Date 09-01-2009 12:20
Shane,
FYI we often use the term "asymmetrical" to describe a double-vee or double-bevel preparation that is something other than equal on both sides, for example one side is beveled to one-third of the thickness while the other side is beveled to two-thirds of the thickness.  Of course, we also use butt joint and not butt weld.
Parent - - By Nanjing Date 09-01-2009 12:52
How about a single sided single bevel?
Parent - By kipman (***) Date 09-01-2009 22:11
I suppose using a dictionary definition (Webster's for me and OED for you, correct?) a single-bevel groove preparation for a butt or tee-joint would have to be called asymmetrical.  As you know, however, we don't often use dictionary definitions in this field.
Parent - - By Stephan (***) Date 09-01-2009 18:47
Kip,

in Germany we call exactly this kind of bevel design a '2/3-V-Joint'.

Just as an addendum to this nice thread, which has - as I can see - been abused again by the 'terrible diamond monster'! LOL! :-)

Best,
Stephan
Parent - - By Shane Feder (****) Date 09-02-2009 00:50
Kip,
My apologies to you and the other guys, I was being a smarta..,
There is no such word as assymetrical.
I will go back to trying to provide knowledgeable responses. LOL !!
Regards,
Shane
Parent - By kipman (***) Date 09-02-2009 12:48
Shane,
No apology necessary.  Actually I didn't catch your intentional spelling variation - the eye sees what it wants to see sometimes.
Regards,
Mankenberg
Parent - By Stephan (***) Date 09-02-2009 13:41
Shane,

as Kip wrote already.

'Assymetrical' is truly a design, which even the Germans have no appropriate 'prescription' for! LOL :-)

Best regards,
Stephan
Parent - By jwright650 (*****) Date 09-02-2009 14:27
I caught the spelling and a$$umed that it was a joke playing off the inccorrect spelling which would make that an impossible weld to produce.....LOL
..unless you were welding up the crack of Dawn. "Butt" then again, she might not appreciate that.
Up Topic Welding Industry / Technical Discussions / the most difficult to weld in accordance with BS EN 287?

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