Hydrotesting is carried out through a systematic and controlled procedure to ensure the cylinder’s strength, safety and compliance with statutory standards.

1️⃣ Preparation & Inspection

Any remaining gas is safely removed and the valve is taken out. The cylinder is thoroughly checked internally and externally for corrosion, cracks or damage.

2️⃣ Ultrasonic Thickness Testing

Ultrasonic testing is performed to check the cylinder wall thickness and detect any hidden cracks or weaknesses.

3️⃣ Filling with Water

The cylinder is filled completely with water, sealed properly and placed inside the water jacket (test chamber).

4️⃣ Pressurization

A high-pressure pump increases the pressure to the required test level. The cylinder is monitored for leaks, expansion or structural weakness.

5️⃣ Depressurization & Drying

After testing, the pressure is released, water is drained and the cylinder is properly dried to prevent moisture damage.

6️⃣ Certification & Revalidation

If the cylinder passes the test, it is re-valved (if required), stamped with the new test date and certified for safe use.