Portable pressure vessels are used for dispensing hazardous, corrosive or flammable products in the specialized branches of the chemical industry including solvents and solvent based products including adhesives, inks, paints and other products. It is used for pumping or drilling in an open field for water, gas or coal, gold, talc, or other minerals and metals. These pressure vessels, which store gases under very high static fluid pressure, are used to inflate life rafts carried by ocean-going ships and aircraft. An inflatable life raft offers the advantage of lightweight and small size, and can be stored in its deflated condition for long periods of time when it is not needed. The pressurized inflation gas contained in the pressure vessel permits the inflatable life raft to be inflated rapidly when needed to form a large raft capable of holding relatively large numbers of people.