CNG Cylinder Testing

CNG Cylinder Testing is a comprehensive process to ensure the safety and integrity of Compressed Natural Gas cylinders used in various applications. The testing is done periodically, typically every 3 years, and involves the following steps

These thorough testing process helps ensure that CNG cylinders are safe and reliable, minimizing the risks associated with gas containment and transportation.

Process:

De-pressuring & Degassing of Cylinders:

Any remaining gas is removed from the cylinders to ensure they are safe to work with.

Borescope

Borescopes are indeed utilized for inspecting the internals of cylinders, particularly to assess corrosion, damages, and other potential issues that might affect their functionality and safety

Internal and External Cleaning & Inspection of Cylinders:

Both the interior and exterior of the cylinders are thoroughly cleaned to remove dirt, contaminants, and residue. A detailed examination of the interior of the cylinders is conducted to identify any signs of corrosion, damage, or other issues.

The outer surface of the cylinders is inspected for various aspects, including thickness, bulges, burns, dents, and dings.

Cylinder Wall Thickness Measurement:

Ultrasonic Thickness Testers are used to measure the thickness of the cylinder walls. This helps assess the cylinder's structural integrity.

UT Flaw Detection

Ultrasonic Testing (UT) is a highly effective non-destructive testing (NDT) method commonly used for detecting and evaluating cracks in metal materials. It relies on the principles of sending high-frequency sound waves (ultrasonic waves) into the metal and analyzing the reflected waves to identify cracks, voids, or other defects. Here's how UT is used specifically for checking cracks in metal

Hydrostatic Test by Water Jacket Method:

The hydrostatic test is performed by immersing the cylinder in water within a specialized test jacket. The cylinder is pressurized with water, and its expansion is monitored to ensure it can withstand the intended pressure safely.

Cylinder Drying:

After the hydrostatic test, the cylinders are carefully dried to prevent corrosion

Test Mark Sign:

A test mark sign is placed on the cylinder to indicate that it has been tested and certified as fit for use.

Assemble & Disassemble of CNG Cascades:

In the case of CNG cascades (multiple interconnected cylinders), they might be disassembled for individual testing and then reassembled once they pass.

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Please Mention CNG Cylinder water Capacity and Number of cylinders