Familiarise with High Pressure Terminology

Compressor Dictionary – B

Breathing Air Cylinders

In Germany, breathing air cylinders for divers must bear the mark "für Tauchgeräte" (for diving). Permitted abbreviations include  "Druckluft-TG" and "Preßluft-TG".

Breathing air cylinders for respirators (for fire services, etc.) must bear the mark "für Atemschutzgeräte" (for respirators). Permitted abbreviations include  "Druckluft-AG" and "Preßluft-AG".

These cylinders may only be filled with breathing air (no NITROX, etc.).
Unique connections for breathing air cylinders have been designed to avoid confusion.
The cylinders require TÜV-approval (German technical inspection authority) every two years.

The following values are stamped into the shoulder of the cylinder:

1. index indicating the strength of the material
2. index indicating the temperature resistance
3. water capacity
4. testing pressure
5. cylinder weight
6. approval no. for the cylinder design
7. country of origin
8. manufacturer's mark
9. serial no.
10. test centre no.
11. testing medium
12. maximum pressure
13. date of first inspection (month and year)
14. consecutive inspections (month and year)

The technical rules for gases (Technische Regeln Gase TRG2) apply accordingly.

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