Stage by stage process for testing the CNG cylinder
- De-Valving:
- Purging of each cylinder individually:
- Internal cleaning:
- Visual inspection (measurement of various external and internal defects by
visual inspection and limiting criteria for acceptance of cylinder)
- Wire brushing (Motorized)
- Weighing:
- Hydrostatic stretch test:
- Internal Drying (by hot air):
- Unloading:
- Stamping:
- Re-installing of cylinder valve:
- Leak testing of cylinder / Cascade as per requirement:
- Painting of Cylinder:
- Re-Purging of each cylinder individually:
- Re-installation cylinder on vehicle / Cascade (as the case may be):
- Re-Installation of all instruments on cascade:
- Certification stretch test:
