How Do You Ensure a Valve is Safe, Reliable, and Leak-Free?

Here are the 6 most common valve testing methods used across Oil & Gas operations:

These tests help prevent leaks, explosions, or operational failures in high-risk environments.

1. Hydrostatic Test:

Uses pressurized water to check the strength & leak-tightness of the valve body. Commonly done for gate and ball valves.

2. Pneumatic Test:

It uses air or nitrogen, which is ideal where water isn’t suitable (e.g., dry systems or stainless steel valves). Extra caution is needed due to gas compressibility.

3. Shell Test:

Validates valve body strength under high pressure. Detects body or bonnet leaks.

4. Backseat Test:

This is for valves with a backseat (like globe valves). Ensures no stem leakage when the valve is fully open.

5. Seat Leak Test:

Ensures the sealing surface (seat) holds pressure. Some valves are tested bi-directionally.

6. Functional Test:

Confirms the smooth operation of actuators, handwheels, or gear mechanisms.