Weld Nomenclature

[knelli]

Hi,

When calling out an intermittent weld, say 4"@12", does that mean there is 12" of space between 4" welds or are the welds @ 12" o.c.?

Blogett's book notes that the 12" is the "distance between centers" which I would think means the 4" weld is 12" o.c.

I have a set of drawings that calls out a 6"@6" weld, hence the question..... Thank you!

 

[MintJulep]

If the call-out follows AWS conventions, then it is the pitch, which is more or less equivalent to "between centers".

If course, if the guy that drew the drawing didn't know that...

 

[vesselfab]

yep....center to center....

 

[Mr168]

Is it calling for an offset/staggered intermittent weld? If not, then it's going to be a continuous bead if the numbers are actually 6"@6". Either way, I'd sooner call and double check unless standard symbols were used.

 

[MintJulep]

Good catch Mr168!

 

[GRoberts]

Could the drawing be using ISO welding symbols? If so, the 6@6 would be a 6" weld with 6" in-between the welds. However, with ISO symbols, they should also be calling out the number of welds as well.