Which equipment does not require cleaning for oxygen service?

Buoyancy compensators do not require cleaning for oxygen service because they are typically not in direct contact with high-pressure oxygen systems. Oxygen service cleaning is primarily focused on equipment that will be used with high purity oxygen or at high pressures, where the risk of fire or explosion due to oxygen-rich environments is a concern.

Buoyancy compensators function in a different capacity; they are designed to provide buoyancy control underwater and generally utilize materials and mechanisms that are not affected by the high purity oxygen cleaning protocols. On the other hand, pressure gauges, regulator first stages, and dive computers often utilize components that can interact with oxygen in a way that necessitates cleaning to ensure safety and prevent contamination or fire hazards. Cleaning for oxygen service helps remove any hydrocarbons or contaminants that could ignite in the presence of high concentrations of oxygen, which is not a concern with buoyancy compensators.