So this year my theme camp has decided to fund, design, and built a metal tower (secure scaffolding) with a "burst" flame effect as well as some constant-on, more artistic and less fwoompy flames. We plan to use it nightly just after dusk, and as the lead I'm following all safety regulations, clearances, etc., and my background in hydraulics, thermodynamics and nuclear safety engineering are also contributing to a safe and awesome experience. I set up our prototype last Saturday, using a 6.5 gallon expansion tank and a regular 20# grill tank for fuel. We get quite a nice flame, and are thrilled to share it

. So my question to the more knowledgeable/people in charge is this:
I've read the theme camp rules about flame effects, and it appears that no certification/approval is required, but I'm planning on having the safety plan, first aid kit, trained crew, etc, regardless, in case an inspection and laminate are required for operation. However, it appears that there is a 40 gallon propane fuel volume limit for theme camp flame effects. [Edit: Decided against larger tank]. OK, new question (old one deleted/retracted): Is there a certification required for theme camp flame effects?