In CNG cylinder hydrostatic testing, the degassing unit plays a critical safety and process role. In simple terms, it makes the cylinder safe to open, test, and handle. Here’s a clear breakdown 👇
Functions of a Degassing Unit in CNG Cylinder Hydro Testing
Safe Removal of Residual CNG
Extracts leftover compressed natural gas from the cylinder before testing.
Prevents fire, explosion, or gas leakage during valve removal and handling.
Pressure Reduction to Zero
Gradually brings the internal cylinder pressure down to atmospheric level.
Avoids sudden decompression that could damage the cylinder or fittings.
Gas Recovery / Venting
Either:
Recovers gas into a storage system (eco-friendly, cost-saving), or
Safely vents gas through a flare or exhaust line.
Ensures compliance with safety and environmental norms.
Leak Detection Support
Controlled degassing helps identify valve or neck leaks before hydro testing.
Any abnormal gas flow indicates possible defects.
Preparation for Valve Removal
Ensures the

• High pressure capacity
• Heavy-duty industrial design
• Reliable & accurate testing
• Custom-built solutions available

Enquiry Now