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

[zjliang]

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

 

[metengr]

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.

 

[unclesyd]

Adding to metengr'spost another term you will hear is a "Feather Edge".

 

[ndeguy]

...with a 3/16 inch gap between the adjacent feathered edges. Should also state the tolerances on that dimension.

Nigel Armstrong
Karachaganak Petroleum
Kazakhstan

 

[zjliang]

Thanks a lot for your guys' quick response.