Detonation cord aka “det cord” is a tube filled with Pentaerythritol tetranitrate (PETN) a compound similar to nitroglycerin. It is used as a breaching agent for doors, or to set off bigger explosives like C4 or TNT.
RatedRR wrapped different lengths of det cord around full beer kegs to see what happens. 15 feet will tap it. 80 feet? That’s a different story. Some brewery out there won’t be getting their cooperage back.