This Nitrogen Pressure Testing SOP (Safe Operating Procedure) gives technicians a clear method for leak testing refrigeration and air conditioning pipework with oxygen-free dry nitrogen. It covers checking and securing the cylinder, regulator and hoses, raising pressure gradually to the rated test pressure, hold periods and leak detection, controlled pressure release before repairs, and what to do if a fitting fails or nitrogen is released in a plant room. It's written by WHS specialists, aligned to Australian WHS legislation, and fully editable in Microsoft Word.
Who it's for
Refrigeration and air conditioning technicians
HVAC installation contractors
Commercial refrigeration service businesses
Building services and maintenance contractors
Mechanical services plumbers
Use it to
Train and induct workers in exactly how you expect the task to be done
Keep a clear reference at the machine, in the vehicle or on site
Record competency with the built-in sign-off
Show clients, insurers and auditors your safe work methods are written down
What this SOP covers
Uncontrolled release of high-pressure nitrogen from hose, fitting or component failure
Overpressurising pipework beyond its rated test pressure
Cylinders falling or valves and regulators being damaged
Fire or explosion if oxygen, compressed air or other gases are used
Manual handling injuries moving nitrogen cylinders
Asphyxiation from nitrogen release in confined or poorly ventilated spaces
Eye and skin injuries from leak detection fluid or failed fittings
Whipping hoses or fittings releasing under pressure
What's included
7 pre-operational checks, from training and licence to the cylinder, regulator, hoses, rated test pressure and ventilation
A 10-step operating procedure covering connection, gradual pressurisation, hold periods, leak detection, recording leaks and controlled pressure release
Isolation and energy control for securing the cylinder, using a rated regulator with pressure relief and staying within test pressure
6 shutdown, housekeeping and post-operation steps
Emergency actions for hose or fitting failure and large nitrogen releases in confined or poorly ventilated spaces
PPE checklist and a list of related documents
Competency acknowledgement and worker sign-off
Space for your logo, SOP number, version and review dates
Why use this template
Saves hours compared with writing an SOP from a blank page
Written as clear, numbered steps that workers can follow on the job
Fully editable, so you can match it to your equipment, site and how your team works
The competency sign-off gives you a training record from day one
How it works
Buy online and download straight away. You'll also get an email with your link.
Add your logo, company name, SOP number and dates.
Check it suits your equipment and site, and edit anything you need to.
Train your workers and have them sign the competency acknowledgement.
Need more than one SOP?
This SOP is also included in the Ultimate Air Conditioning & Refrigeration SOP Bundle. At $197 for the whole bundle, it works out much cheaper than buying SOPs one at a time.
Common questions
Does it cover refrigerant recovery or charging?
No. It covers nitrogen pressure testing only. Refrigerant recovery, evacuation and charging, and brazing or soldering, need their own procedures.
Can I use compressed air instead of nitrogen?
No. The SOP requires oxygen-free dry nitrogen, or an approved nitrogen and tracer gas mix, because oxygen or compressed air can cause a fire or explosion with residual refrigerant or oil.
Does it address working in plant rooms?
Yes. It requires the area to be adequately ventilated and covers evacuating immediately if a large release of nitrogen occurs in a confined or poorly ventilated space.
Can I change it?
Yes. It's a Microsoft Word file, so you can add, remove or change any step, check or hazard, and add your own logo and details.
Does it suit my state?
Yes. It's written to the model WHS laws and suits all states and territories, including Victoria under the OHS Act and Regulations.
What if it doesn't suit my work?
You're covered by our 30-day money-back guarantee if it isn't fit for purpose.
