How to handle oxygen gas ?

Bulk oxygen supply location must be outside buildings. Gas should be piped to the laboratory at the lowest usable pressure. Store extra oxygen cylinders in well ventilated outdoor locations away from flammable and combustible materials. Oxygen cylinders must be stored at least 20 feet from all flammable gases or be separated by a noncombustible, fire-resistant barrier with at least a half-hour rating. Permanently installed containers must have substantial noncombustible supports on firm noncombustible foundations. All fittings for oxygen service must be oil and grease free to prevent fire or explosion.

Equipment & Piping should be free oil & grease