Cylinder Hydrostatic Testing

Newcastle Safety Servicing can provide Hydrostatic Testing for all compressed air cylinders from personal SCUBA cylinders up to G size storage cylinders. Scuba Cylinders are high pressure vessels and as such should be handled carefully.

In Australia all scuba cylinders are required to undergo hydro testing every twelve months. This is to be carried out in accordance with Australian Standard 2030.1 by a Certified Test Station.

Being an SAI Global Certified Test Station, Newcastle Safety Servicing can service, test and repair all types of compressed air cylinders belonging to:

  • Self Contained Breathing Apparatus
  • SCBA
  • CABA
  • Emergency Breathing Systems

Cylinders are tested to Australian Standards AS2030, AS2337 and also to manufacturer's specifications. In the event of a cylinder failing test and requiring replacement or other extended delays, we have many types of SCBA cylinders available for hire being 4.7 litre cylinders, 6.8 litre cylinders & 9 litre cylinders.

Testing Process:

An external inspection is carried out looking for physical damage, alterations, gouges, dents or corrosion. Special attention needs to be paid to repainted cylinders as they may have been heat treated or had dents or gouges filled. Dents, gouges, corrosion or heat treating can all effect the integrity of the compressed air cylinder and they can fail test as a result.

The cylinder is then drained and the valve removed. If in the opinion of the service technician the valve requires to be serviced it will usually be serviced at an additional cost. The neck thread and internal space is checked for corrosion, wear, pitting or rust using telescopic mirrors. Steel cylinders as we all know can be subject to rust, some brands more than others due to the amount of carbon used in the steel when manufactured. It needs to be pointed out that rust in steel cylinders is usually a result of carelessness by its user or your fill station.

If your cylinder has been filled with moist air from a station that has not been maintaining its filters or compressor adequately rust will occur, oil may also be found if this is the case.

The cylinder is then hooked up to the Newcastle Safety Servicing Test Panel. Once all air is removed, the cylinder is pressurised to its test pressure and held there for one minute. The pressure is slowly released and the expansion measured on a manometer tube. The maximum allowed expansion is measured as per the Australian Standards.

The cylinder is disconnected from the test panel and inverted to drain after which it is dried using warm air on our cylinder heater. After a final internal inspection to ensure proper drying the neck "o"ring is replaced and the valve installed.

The cylinder is then stamped, filled, leak tested at the neck and the test certificate completed. In most cases, NSS will have this process complete and the cylinder ready to go back to you within 48 hours.