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What does that mean, "No Land and with 3/16" Gap" 1

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zjliang

Mechanical
Joined
Aug 23, 2006
Messages
47
Location
US
Hey Folks,

What does that mean when vendor mentioned "No Land and with 3/16" Gap" to describe the long seam preparation?

Thanks,

A Novice
 
zjliang;
This terminology applies to a butt weld joint. Here is my layman's definition; the ends of the metal to be joined in a long seam are prepared similar to a "knife edge" and are separated at the sharp edge (ID surface) by no more than 3/16" distance.
 
Adding to metengr'spost another term you will hear is a "Feather Edge".
 
...with a 3/16 inch gap between the adjacent feathered edges. Should also state the tolerances on that dimension.

Nigel Armstrong
Karachaganak Petroleum
Kazakhstan
 
Thanks a lot for your guys' quick response. :)
 
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