Just don't rely on the hose fittings/couplings/connections. I'm not very confident that they'd hold together under a heavy longitudinal load, especially the kind of lighter duty hose meant for occupant use in large or high-rise structures. I'd also guess that the hose itself is sufficiently strong. So, I'd imagine you could tie the hose something like you would flat/tubular webbing, right? What kinds of knots would be best to connect lengths of hose together or to a fixed strong point, then?

P.S. You can buy all kinds of stuff like wallets, belts and pouches made from retired fire hoses, online, if you like that kind of stuff.