15kgs Cylinders

HEAT TREATMENT

We treat our cylinders in an electric anneal oven in which each cylinders is heated to around 600 ^o C 700 ^o C within one minute and left to normalize under room temperature.

TESTS DONE

• Water capacity – 10 cylinders in each lot is randomly checked and found to be approximately 26.2 litres.
• Pressure test – each cylinder goes through pressure testing of approximately 30 bars – 40 bars.
• Volumetric expansion test – one cylinder in each batch is picked randomly and then put in the test jacket and the permanent expansion always remained below 10 %.
• Air leakage test – All cylinders are filled with air of about 90 psi and dipped in water.
• Visual test – All cylinders are inspected by the quality manager.