I don't believe D1.1 directly addresses roundness tolerances. That is normally a fitness-for-purpose kind of tolerances, something agreeable to all parties, or else it should be in the job specs. The closest thing I can think of in D1.1 is 5.22.3.1 Girth Weld Alignment. That covers but how round a stack should be.
CHGuilford

Try a search on ASME STS-1-2000 "Steel Stacks" you may also be able to get some information at http://www.asme.org/cns/departments/Standardization/Public/STS/ or find out where to purchase a standard that may apply to your specific application.

Sometimes the project specification referred to by the purchase order calls out tolerances other than those in the code for fabrication/erection.

Have a pleasant day

Gerald Austin

It really depends on what the purchaser requires in the purchase specification. The tolerances would either be spelled out directly or there should be a reference to a published industry fabrication standard. There used to be a 1975 ASCE specification on "Design and Construction of Steel Chimney Liners" that had tolerances, but it may have been replaced by a later standard, such as the one Gerald referenced. You can try the ASCE website at:

http://www.asce.org/

or try Global Engineering Documents at:

http://www.global.ihs.com/

Marty

If the literature mentioned on the other postings fail to give an information, I would take as a reference the out-of-roundness tolerance allowed by API Std. 5L for large diameter welded piping: two diameters measured at 90 degrees from each other must not diverge more than 1 percent.
Giovanni S. Crisi
Sao Paulo - Brazil