Approximately 36 percent of nitrogen gas supplied by gas companies is delivered in high-pressure cylinders. At first, it would appear to be a fairly simple method of supply, requiring a cylinder, pressure regulator and piping to deliver nitrogen gas to the application.
However, the following checks and procedures must be carried out every time a cylinder is exchanged and the pressure regulator re-fitted and re-connected to a gas system to ensure safe operation. It is also important to understand that when an individual is charged with the responsibility of connecting and disconnecting high-pressure cylinders to an application, they could be personally liable if anything goes wrong.
When taking delivery of cylinders, it is essential that the three safety inspections listed below are carried out each and every time a cylinder is changed over.
Although cylinders are colour coded, this should not be relied upon to identify the contents. The label affixed to the cylinder must always be used as the primary means of contents identification. Cylinders without labels or where the label doesn’t match the colour coding should not be used. They need to be set aside or quarantined and returned to the supplier. It is essential to refuse acceptance at the point of delivery if any cylinders do not have identification labels attached.
Having determined the contents of the cylinder, it is then necessary to check that the gas is suitable for the application. The pressure of the gas in the cylinder should not be more than the regulator fitted, and the cylinder needs to be secured so that it can’t topple over — ideally in a purpose-built cylinder rack or store.
The cylinder valve comes fitted to the cylinder when it is delivered. It is basically an open or closed valve operated with a key/spanner. The pressure regulator is then fitted to this. If the valve is on a newly filled, unused cylinder it should have a factory sealing cap in place. Checks should be carried out to ensure the fitting is undamaged and contaminate free. It is essential that there are no signs of solvents, oils, greases or PTFE tape, and it must be clear of dirt and moisture. Note that PTFE sealing tape should never be used as the pressure regulator has its own rubber seal. PTFE can cause fire/explosions if used with certain gas species.
Now, you should be good to go!
Alternatively, an on-site nitrogen generator can be used and will alleviate all the hazards and risks associated with high-pressure nitrogen gas cylinders. The Parker NITROSource generator, for example, offers a unique design and advanced energy-saving technology that requires less compressed air to generate more nitrogen. Substantially lower servicing costs, reduced downtime, and longer working life make it the most cost-efficient nitrogen supply available. Additional benefits include:
Watch this video to learn more about the Parker NITROSource on-site nitrogen generator.
This post was contributed by Dave Sykes, gas generation technology blog team member, and Phil Green, industrial gas application manager, Parker Gas Separation and Filtration Division EMEA.
Related content:
Top Frequently Asked Questions About Nitrogen Generators
Is On-Site Nitrogen Gas Generation Economical for Variable Flow Applications?
Nitrogen: A Cost Effective Way to Extend Food Shelf Life
Parker Balston Extends Warranty on All Industrial Nitrogen Generators
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Comments for Three Safety Issues to Consider When Using Compressed Nitrogen Gas Cylinders
safety issue for using compressed di nitrogen gas.
Thank you for contacting us regarding your nitrogen generator. If you can provide your country/location and more detail of your unit to confirm it is one of Parker's brands, we will have our technical support team contact you.
We just require the model number and serial number, which are located on the rating plate on the generator.
Regards, Rob Lear
Can I have a look at one of your unit in Hyderabad, India
Please contact this Parker location for details on where to buy gas generators
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