Fitting dimensions to use with ASME B31J?

If it's for standard B16.9 fittings, the best you can do is actually measure them up. A lot of dimensions arent listed in B16.9, and as such the mill is free to make up their own dimensions, as long as they meet the B16.9 requirements. You might find such dimensions online, but in the best possible situation, theyre only applicable for that specific manufacturer (who put that brochure on the interwebs), and changes are thats not your manufacturer. Evene if it were, there's a change his dimensions may not be consistent. Most likely you wont find anything useful.

A lot of this has been written in on eng-tips.com, just Google this phrase and youll find some very good topics on this subject site:eng-tips.com B16.9 fitting dimensions

WIthout max/min values supplied by the manufacturer or samples to measure it seems wise to be conservative. B31.J Table 1-1 Note 11 provides a SIF of 2.0 for reducers. Tee crotch radius and thickness (Tc & rx) are not actually used by B31.J for the calculation of welding tee SIFs except for very thick tee's as noted in B31.J Table 1-1 Note 7(f); if the tee's aren't that thick then any entry into AutoPIPE that prevents the software from applying the 1.1 multiplier should be correct.

Thank you AutoPIPE developers for providing the B31j option. It would certainly be helpful if AutoPIPE just gave us an option to ignore the 1.1 on SIF's and go SIF of 2.0 for reducers without needing to enter dimensional data.

WIthout max/min values supplied by the manufacturer or samples to measure it seems wise to be conservative. B31.J Table 1-1 Note 11 provides a SIF of 2.0 for reducers. Tee crotch radius and thickness (Tc & rx) are not actually used by B31.J for the calculation of welding tee SIFs except for very thick tee's as noted in B31.J Table 1-1 Note 7(f); if the tee's aren't that thick then any entry into AutoPIPE that prevents the software from applying the 1.1 multiplier should be correct.

Thank you AutoPIPE developers for providing the B31j option. It would certainly be helpful if AutoPIPE just gave us an option to ignore the 1.1 on SIF's and go SIF of 2.0 for reducers without needing to enter dimensional data.

I wasn't aware of the details of B31J that much, Matt, so your remark has provided me some valuable new insights.Indeed, reducers should be max 2.0, but in no case less than 1.0.

For tees, Tc and rx both dont come into the equation, so it seems AutoPIPE has used a different approach here.

It's very good AutoPIPE has provided us with the B31J option, but it seems it might contain some bugs. I think the best (and most fast n easy method) you can do is log an SR (Service  Request) ticket, as not all issues reported here on the forum are either noticed, or reported for improvement.

Good point about the ticket, to clarify the request for Tc & rx is not a bug, it corresponds to a note for exceptionally heavy tees found in Note 7 below Table 1-1. It is rarely applicable though and it's allot of trouble to enter it for every tee.

There are all good points Matt/ HVN. Please keep them coming, and we would surely keep them on our to do list for future releases to improve on our B31J implementation.

Do you guys have any broader level suggestions or comments regarding B31J implementation in AutoPIPE, something like: I need it for more piping codes, I need to include/exclude tees that use B31J rules, I need comparison of B31J and other appendix D SIF comparison, or any other thing?

Hi Bilal, thanks for the follow-up. Right now I dont have more comments or suggestions, I just started using the B31J option for B31.3 code designs. If I find something in the future I will post it.

Bilal,

Thank you for asking, I imagine users of other ASME B31 codes will be looking for B31J functionality in the near future.