I – TOPIC AND RANGE OF APPLICATION
This instruction describes the procedure and equipment for the pneumatic and hydraulic test for the 490 valves to our suppliers and external service providers.
II – HISTORY OF MODIFICATIONS
| DATE | INDICE | DETAILS OF MODIFICATIONS | PAGES |
| 23/02/2015 | A | Creation | all |
III – Plan
- Equipement for the implementation
- Test process
IV – ANNEXES
| INDICE | A | |
| DATE CREATION /MODIF. | 23/02/2015 | |
| CREE OR MODIF. PAR | R. DUBROCA | RD |
| VERIFIED BY | F.FRANCES | FF |
| APPROUVED BY | M.VEVAUD | MV |
- Equipment for the implementation
– (1) Pneumatic test bench (Air injected underwater)
– (2) Hydraulic test bench (Water injected)
- Test process
Pneumatic air test underwater, 7 bars for 10 seconds
- The valve is opened.
Air is injected from the male or female side (bonnet side); the other side must be waterproof.
- The valve is closed.
Air is injected from the male or female side (bonnet side). The other side must be waterproof.
- Take the valve, and open it.
There must be a sound at the opening (discharge of air).
This proves the excellent sealing of the valve.
Hydraulic test, 45 bars for 30 seconds
- Valve opened
Water is injected from the male or female side (bonnet side) the other side and must be waterproof.
2) Valve closed
The ball valve is tested in positions closed one after the other to check the sealing of the ball.
The valve is closed; water is injected from the male or female side (bonnet side)
