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Frequently Asked Questions/FAQ

Are more cylinders rejected if they are tested with ultrasonic method as if they were tested with water pressure instead?
Not necessarily. Our experience, based on testings over 1 million cylinders, cleary shows that only about 1,7% of the cylinders tested are rejected. The percentage of rejection is even lower if newer cylinders are tested. However, cylinders that are rejected are a potential safety risk and show among others critical flaws like cracks which are not found with traditional hydraulic testings.

How many cylinders can be tested with Autosonic™ ultrasonic testing systems?
The capacity of the testing unit depends greatly on the volume of the tested cylinders. If the cylinders are in good condition (no stickers, etc.) the unit can test 25 to 35 cylinders per hour. Approximately 150 to 250 cylinders can be tested per shift (8 hours), including time for calibration.

Can my company switch from pressure testing to ultrasonic testing?
In principle, yes. Ultrasonic testing is an approved alternative to pressure testing according to the current regulations of ADR/RID.

Does the valve need to be removed for ultrasonic testing?
The decision whether the valve has to be removed or not depends on your local authority. In Switzerland it is handled as follows: The valve is only removed for internal inspection in case a flaw signal is displayed during the testing procedure.

Why is the transition area from the cylindrical part to the shoulder not examined in the ultrasonic testing procedure?
The examination of the transition area from the cylindrical part to the shoulder is not necessary because this area shows less stress and the material is thicker.

Can the transition area to the base be examined with your ultrasonic testing unit?
The transition area from the cylindrical part to the base constitutes a critical point, as many flaws are detected (conditioned by manufacturing process). Our Autosonic™ standard, Autosonic™  flow and Autosonic™  light can be additionally equipped with a sixth channel in order to test the transition area to the base.

Can our existing cylinder data be transferred?
Cylinder data that has already been entered in another system can be copied into the specially developed interface table which our software provides and can be used for cylinder testing with ultrasonic.

Do you have further questions regarding the ultrasonic testing of gas cylinders? Please do not hesitate to contact us: Autosonic