Tape on a gas flue

Need a code or reference for duct tape or aluminum tape on a gas flue. Single wall or double wall.

I see it all the time but understand it is not correct. Ty

As far as I know John it is allowed…but the pipe needs to be joined Mechanically… I will look for ref…

Regular duct tape is wrong.

I was reading that earlier today. I believe its M1803.3 in IRC. Screws and rivets. New guy, so I would double check

UMC 03,802.10.7 and IRC 03,2427.10.7

sheet metal screws or PMI (per manufacturers instructions) the ones that lock together