CEN/TC 79/SC 7 - Diving apparatus

This European Standard specifies requirements for the quality of compressed gas supplied for mixing or use in respiratory protective devices and hyper- and hypobaric operations. Account is taken of the use of compressed gases for normal atmospheric pressure as well as for hyper- and hypobaric pressures.
This European Standard does not apply to compressed gases used for medical purposes or for aerospace applications.

This European Standard specifies minimum requirements for self-contained open-circuit compressed air underwater breathing apparatus and their sub-assemblies to ensure a minimum level of safe operation of the apparatus down to a maximum depth of 50 m.

This European Standard specifies minimum requirements for self-contained re-breathing diving apparatus to ensure a minimum level of safe operation of the apparatus. It applies to the following:
-   a maximum depth of 6 m for apparatus using pure oxygen;
-   a maximum depth of 40 m for apparatus using oxygen in nitrogen gas mixtures;
-   a maximum depth of 100 m for apparatus using oxygen and helium or oxygen, nitrogen and helium gas mixtures;
-   water temperatures from 4 °C to 34 °C or outside these temperatures as specified by the manufacturer.

TC - Modification to 8.6 in the E mother reference version.

This European Standard specifies minimum requirements for free flow surface supplied and free flow surface oriented diving apparatus to ensure a minimum level of safe operation of the apparatus. It applies to the following:
a maximum depth of 50 m for apparatus using:
1)   air or;
2)   oxygen or;
3)   oxygen in nitrogen mixtures (Nitrox) or;
4)   oxygen in helium mixtures (Heliox) or;
5)   oxygen, nitrogen and helium mixtures (Trimix);
water temperatures between 4 °C and 34 °C or outside these temperatures as specified by the manufacturer;
environmental temperatures between -20 °C and 50 °C or outside these temperatures as specified by the manufacturer.
The requirements of this European Standard are intended to take account of the interaction between the wearer, the apparatus, and where possible the environment in which the apparatus is likely to be used.
This European Standard does not cover saturation diving systems, mini bell systems or apparatus used for oxygen decompression only.

This European Standard specifies minimum requirements for demand surface supplied and demand surface oriented diving apparatus to ensure a minimum level of safe operation of the apparatus. It 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 European Standard are intended to take account of the interaction between the wearer, the apparatus, and where possible the environment in which the apparatus is likely to be used.
This European Standard does not cover saturation diving systems, mini bell systems or apparatus used for oxygen decompression only.

This European Standard is applicable to a thread connection used for the connection between a gas cylinder valve and a pressure reducer for respiratory equipment for diving containing breathable nitrox gas with an oxygen content greater than 22 % or oxygen. This European Standard specifies the dimensions and tolerances for connections which are used for respiratory equipment.

This European Standard applies to self-contained open-circuit compressed Nitrox underwater breathing apparatus. This European Standard defines additional requirements for Nitrox-SCUBA to those already given in EN 250. The object of the requirements and tests set out in this European Standard is to ensure a minimum level of safe operation for apparatus to the maximum operable depth (MOD) of the used Nitrox-mixture.

This European Standard applies to self-contained open-circuit compressed air underwater breathing apparatus and their sub-assemblies. The object of the requirements and tests set out in this European Standard is to ensure a minimum level of safe operation for apparatus down to a maximum depth of 50 m. Laboratory and practical performance tests are included for the assessment of compliance with the requirements.

This European Standard applies to self-contained open-circuit compressed air underwater breathing apparatus and their sub-assemblies. The object of the requirements and tests set out in this European Standard is to ensure a minimum level of safe operation for apparatus to a maximum depth of 50 m. Labo ratory and practical performance tests are included for the assessment of compliance with the requirements.

This European Standard specifies minimum requirements for self-contained re-breathing diving apparatus to ensure a minimum level of safe operation of the apparatus. It applies to the following:
- a maximum depth of 6 m for apparatus using pure oxygen;
- a maximum depth of 40 m for apparatus using oxygen in nitrogen gas mixtures;
- a maximum depth of 100 m for apparatus using oxygen and helium or oxygen, nitrogen and helium gas mixtures;
- water temperatures between 4 °C and 34 °C.
The requirements of this standard are intended to take account of the interaction between the wearer, the apparatus, and where possible the environment in which the apparatus is likely to be used. See annex ZA.

This European Standard applies to self-contained, open-circuit compressed air underwater breathing apparatus.   The object of the requirements and tests set out in this European Standard is to ensure a minimum level of safe operation for underwater breathing apparatus to a maximum depth of 50 m.   Laboratory and practical performance tests are included for the assessment of compliance with the requirements.