Cylinder Hydro Test  

All Compressor cylinders are hydrostatically tested prior to shipment. The cylinders are tested at a minimum of 1 hour at 1.5 times the rated MAWP of the cylinder (Maximum Allowable Working Pressure). The hydrostatic test pressure is recorded on a pressure test recorder vs time and retained with the permanent unit file.
 
Optional testing includes:
 
Witnessed Cylinder Hydrotest
Cylinder Helium leak test (Below 12 MW or above 50% Hydrogen by content).
 
(reference ISO 8.2.4.4 for cylinder hydro test)

Ariel Corporation Application Manual  
6 December 2006