Luxfer Gas Cylinders has received an increased number of inquiries about
underwater use of full-wrapped Type 3 carbon composite cylinders. A
Type 3 cylinder is a high-pressure cylinder composed of an all-aluminum
liner fully overwrapped with layers of carbon fiber and fiberglass.
The term oxygen service generally means using pure oxygen (oxygen concentrations of 95% to 100%), but the term is sometimes used more broadly to refer to any gas mixture containing more oxygen than air.