Gas cylinder test periods are defined by the gas traffic or type of gas in a cylinder. The cylinder manufacturer has produced a gas cylinder to an approved design. The design specifies the parameters that the gas cylinder can be used within. These limitations include such things as the pressure a cylinder can be filled to and the pressure is must be tested to, also the periodic re-inspection and test intervals.
The legal requirements for filling and testing a cylinder in New Zealand are prescribed in the Hazardous Substances and New Organisms Act and the set of regulatory controls below it. The Compressed Gases regulations list all the requirements for a gas cylinder in NZ.
|Gas Type||Period For Re-test|
|LPg – Any application||10 years|
|CO2 – Cylinders||5 years|
|CO2 – Fire Extinguishers (except below)||5 years|
|CO2 – Fire Extinguishers with shrunk on foot rings||2 years|
|Nitrogen – Any application||10 years|
|Argon – Any application||10 years|
|Air – (except below)||10 years|
|SCBA Aluminium Cylinders FRP||3 years|
|SCUBA Hydrostatic test||2 years|
|SCUBA Visual test||1 years|
Portable LPg gas heaters or cabinet heaters as they are sometimes referred to, require servicing and cleaning from time to time. Servicing and maintenance ensures that the appliance is safe to use and is operating as efficiently as the manufacturer intended. The manufacturer's usual specified time requirement for serving is annually. This is when the appliance is used all year round. As we use heaters about 4-5 months of the year we can extend the times between servicing to 2-3 years. This is of course a full service; a safety inspection should be done by a competent service technician before each winter.
A safety inspection would include but not be limited to checking such things like rubber hoses, safety system function, general appearance of the flame and a leak test using a gas meter. The technician can than advise if any further work would be required.
A good practice when starting a gas heater is to stand to the side of the heater while operating the starting buttons. This reduces the likely hood of loose clothing being caught by the flame as the heater lights. Provide the heater with clean air! By providing ventilation to the room the heater is used in, you not only create a healthier environment for your own comfort but the heater will burn more efficiently, giving you more heat for your money!
Your gas cylinder will provide you with many years of reliable performance. You do need to look after it by keeping it out of the weather when being stored and being gentle with the tap or valve when connecting appliances and turning it on or off. Never force a valve! If the valve seems stuck, bring it to us and ask us to have a look at it.
How do you know how much gas is left in your cylinder? Weighing the cylinder is the only accurate way to tell the residual contents. However if you warm the cylinder with a hot cloth at about the level you think the gas is at, you will find that the metal will cool quickly at the level of the gas and stay warm above the gas level. If you choose to use a dish cloth, it would be a great idea if you also dribble a little water on the connections and do a leak check at the same time. Bubbles will form as the soapy water runs around the connections.
For more helpful advice contact us and let us help you using the years of knowledge and experience we can call on.
For safety information about gas and gas appliances please follow the link.