abandoned
acetylene
air
blue
bundle
butane
carbon
chemical
co2
compressed
container
cylinder
danger
dangerous
dioxide
emergency
equipment
explosive
extinguish
fire
flammable
fuel
gas
helium
hose
hydrogen
industrial
industry
insurance
liquid
medical
metal
methane
nitrogen
oxygen
pipe
pressure
propane
protection
rack
refill
rusty
safety
secured
security
steel
storage
tank
valve
welding