BS EN 15333-1:2008 Respiratory equipment. Open-circuit umbilical supplied compressed gas diving apparatus. Demand apparatus
BS EN 15333-1 specifies minimum requirements for demand surface supplied and demand surface oriented diving apparatus to ensure a minimum level of safe operation of the apparatus.
A given open-circuit umbilical supplied compressed gas diving apparatus can only be approved when the apparatus or apparatus sub-assemblies satisfy the requirements of the tests specified in this BS EN 15333-1. The practical performance tests also have to be carried out successfully on complete apparatus where specified in this standard.
The production of this standard has identified varying methods of surface supply and has separated them into two parts:
- Equipment that supplies demand type facepieces
- Equipment that supplies free flow type facepieces.
BS EN 15333-1 applies to the following:
- Depths between 0 m and 50 m for apparatus using air, oxygen or oxygen in nitrogen mixtures
- Depths between 0 m and 60 m for apparatus using oxygen, oxygen and helium or oxygen, nitrogen and helium gas mixtures
- Water temperatures between 4 °C and 34 °C or outside these temperatures as specified by the manufacturer.
The requirements of this BS EN 15333-1 should take account of the interaction between the wearer, the apparatus, and where possible the environment in which the apparatus is likely to be used.
BS EN 15333-1 does not cover saturation diving systems, mini bell systems or apparatus used for oxygen decompression only.