Cylinder Testing

Hydrostatic Testing

Hydro-Tech’s state of the art hydro-static test station allows inspections and testing of all seamless cylinders in strict compliance with Australian standards AS2337.1 and AS2337.3 (composites).

This includes SCUBA, SCBA (Breathing apparatus), portable CO2 fire extinguishers, suppression system, ANSUL, and air bank cylinders.

Prior to undertaking any Hydro-static test, all cylinders are subject to a full external and internal examination to ensure that any corrosion or other defects are within the specifications outlined in the Australian Standards. Any cylinders not meeting those specifications cannot be tested.

Our Hydro-Static test rig is capable of testing cylinders up to 10,000psi (70,000kPa), using a hydraulic stretch test to measure permanent volumetric expansion. 

Cylinders meeting all inspection criteria, and with permanent volumetric expansions within the allowable 0.02% of cylinder volume, will be stamped with Hydro-Tech’s station identifier  and test date to indicate that it meets the Australian Standards. Customers will be provided with a test certificate on request.

Pressure Testing

Our Liquid and Powder test stations allow us to safely inspect and test all size Water, Foam, WetChem, ABE and BE fire extinguishers up to 6000kPa.

Hydro-Tech use a “dry” pressure test system for all cylinders to eliminate the need to use substantial quantities of water, and the accompanying requirement to dry all powder cylinders via the use of energy intensive drying systems.

 Hydro-Tech is committed to reducing our carbon footprint wherever possible

What does a Pressure Test Include

Pressure testing of extinguishers is performed using a mixture of compressed air and nitrogen.

General Inspection

When Liquid or Powder extinguishers are initially received their general condition is assessed for any defects such as corrosion and physical damage.

Depressurize and decant

Extinguishers are depressurised and the contents decanted. We use specialised equipment to reclaim all powder chemicals, while liquids are stored for subsequent disposal.

Remove Heads

The heads are removed, inspected and cleaned

Internal inspections

An internal inspection is carried out to confirm that there is no evidence of damage or corrosion within the extinguisher.

Pressure Test

Cylinders are then placed inside a secure enclosure or cage, before being pressurised to the required test pressure, The pressure is held for 1 minute and a check performed that no pressure has been released, and that the cylinders have not deformed.


Extinguishers are now ready to be depressurised and recharged.