2x2 rule sticky/pinned

[lew]

Government was involved. What did you expect? Perverse incentive is their bag.

[Frog of Peace]

I think it is silly they limited the outside Diameter.
That ist an incitation to make the walls as thin as you can to maximise capacity at the cost of security.

[Nish]

Job well done.

[zenmic]

Thanks everybody!

[Grendel]

govinfo.gov link:
https://www.govinfo.gov/app/details/...80-209/context


https://www.govinfo.gov/content/pkg/CFR-2011-title49-vol3/pdf/CFR-2011-title49-vol3-sec180-209.pdf

Snap shot of relevent table out of 49 CFR 180.209:

[Chuck E Ducky]

Every time I have needed it I just google it. 2” round less then 2’ length (Aluminum 3k HPA tanks) are exempt from hydro. It’s on the DOT website and Most hydro pages have the info as well. Never had an issue yet in +20 years after showing the rule in black and white.

https://www.law.cornell.edu/cfr/text/49/180.209

[zenmic]

Does anyone still have a copy of the 2" or 2' rule for those 13ci tanks? The old forum had it sticky/pinned. A friend was asking as they are about to buy a few of these tanks, and I wanted to point them to the sticky for reference.