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Where can I purchase nitrogen gas?

When it comes to the question of where to get nitrogen gas, you can't go past Rent Free Gas. Renting a cylinder may seem like the obvious option, but think about it – do you really want to be paying every month for something that might sit in your shed for a year? Rent Free Gas is where to get nitrogen gas cylinders that are yours to keep. Where does nitrogen come from? Every time you breathe, you're inhaling mainly nitrogen. Where to get nitrogen gas? It's literally everywhere! Nitrogen makes up almost 80 percent of the earth's atmosphere. Where to get nitrogen gas for your projects Nitrogen may be everywhere, but we know that's not what you're really thinking. The question really is 'where do I get nitrogen gas so I can use it for my DIY, commercial and industrial applications?' Before we can recommend where to get nitrogen gas at great prices and without even paying for delivery in metro areas, let's take a look at how that nitrogen gets in the cylinder in the first place. How nitrogen gas gets in those cylinders The process of extracting nitrogen from the air and separating it for you to use is called 'fractional distillation'. First, the air is filtered so that particles like dust are removed. Next, it is cooled in several different stages until it reaches the temperature of minus 200 C. At this temperature, 'air' is not really 'air' anymore – it's liquid. When that air turns into liquid, water vapour is removed with absorbing filters. At about minus 80 C, C02 freezes, so that's easy to remove. And because oxygen turns into liquid at a slightly warmer temperature than nitrogen, it's not too hard to separate them. Nitrogen gas from Rent Free Gas The most common use of our nitrogen gas cylinders is welding, and it's great for purging and blanketing but it's also a great way to reliably and efficiently inflate [...]

Use a nitrogen gas supply for your car’s tyres

Nitrogen. We've all heard of it, but did you know car enthusiasts use it every single day? Let's run through a nitrogen gas supply Q&A session regarding a use for this handy gas that you may never have even thought about: pumping up your car tyres.   Q: Nitrogen gas supply for car tyres is really a thing? A: Yes! Although most common in high performance tyres, such as aircraft and racing cars, many people use a nitrogen gas supply to inflate their road car tyres.   Q: Is nitrogen gas supply for my car even safe? A: Yes! Nitrogen is quite a safe gas as it is inert – in fact, it's one of the most commonly used chemicals in the world and makes up 78% of the earth's breathable atmosphere.   Q: That's right: didn't I hear that nitrogen gas supply is used with food? A: Correct. Nitrogen gas supply is used for packaging and storing food and other things like coffee.   Q: But why would I use nitrogen gas supply for my car's tyres? A: Although it is often used in racing cars and aircraft for running temperature reasons, a big benefit in everyday use is that it will keep the inflation of your tyres more consistent. So you need to check them less often!   Q: But I've heard that tyres inflated by nitrogen should be at a different pressure to what is ordinarily recommended for my car. Is that right? A: No – whether or not you use a nitrogen gas supply to inflate your tyres, stick with those normal recommendations. But what you will notice is that your tyres stay at that inflation level for longer.   Q: I've heard that I need to dilute the nitrogen gas supply with air – is this right? A: That's not right. The whole point of using nitrogen is that you get the full benefits of a nitrogen gas supply without all the other elements of normal 'air'.   Q: But [...]

Rent free argon – What can argon be used for?

Put simply, rent free argon is what we deliver for you to keep. Because our rent free argon is yours once we’ve delivered it, you never need to pay rent on that cylinder, so you can put it away and use it whenever you need it. What is argon? Argon is known as one of the ‘noble gases’. What does that mean? Basically, it can create an ideal inert atmosphere which is loved by welders. Argon is used to shield the metals that are being welded so they don’t oxidise. Argon – much more than ‘lazy’ Argon has no colour, taste or odour, but it’s much more than that – even though it got its name from the Greek word for ‘lazy’, given how well it does its job without reacting. Argon can be used in fluoro lights, but for DIY and industrial processes, rent free argon really is handy. Again, it’s all about the non-reactive qualities of argon. So when welding those speciality alloys, for example, rent free argon is perfect. A versatile gas Because it’s all around us as an element of our breathable air, argon is abundant and inexpensive. Mixed with other gases, argon is regarded as the perfect shielding gas for TIG welding. But argon is also used for MIG welding, protecting that weld from the reactive properties of the air around it. Argon is also a great insulator, so deep sea divers love it to keep them warm in those deep, dark depths. Argon can also help to preserve things. What, exactly? Important historical documents, for example, can have argon pumped into their enclosures, which will help to protect the paper or ink from degrading over time. Argon is also used for wine preservation. In this way, argon supplied by Rent Free Gas could easily have been used for that 500-year-old map of the world in the US Library of Congress, or a priceless and super-rare copy of the historic [...]

Our gas delivery makes your project easy

When it comes to all of the home, commercial and industrial projects that are on your 'to do' list, we know how important they are to you, your family and your business. So whether it's argon, O2, CO2, nitrogen or helium that you need to see you through, fast and efficient gas delivery is what we supply without question. Argon Argon is a popular gas used as a shielding agent in aluminium and steel welding, whether your project requires the TIG or MIG process. If you need argon, we do your gas delivery either by Australia Post for small cylinders, or we'll deliver the larger cylinders right to your door ourselves, provided you are within 30km of the CBD in Sydney, Melbourne, Brisbane or Adelaide. Oxygen We also do gas delivery for your applications that require oxygen. Most of the time, you'll want your oxygen for the flexibility of the burning flame – but it may be that you won't want to use O2 every day. If that's the case, then renting makes little sense, because those renting costs quickly add up. If you get your delivery from Rent Free Gas, you will have your very own gas cylinder, which means you can forget all about rental fees. CO2 If delivery of CO2 is what you desire, you could be wanting it for a huge range of various and innovative applications. It is relevant for many DIY, commercial, hospitality and industrial uses, but whatever you need it for, efficient and speedy delivery is a key to getting that project done right. Luckily, our delivery options have you covered, because we either post it to almost every postcode in Australia, or deliver it ourselves to any place within 30kms of the capital cities (excluding WA) . Nitrogen Just like argon, oxygen and CO2 gas delivery, we're passionate about getting nitrogen to you as well. It helps our customers in so many ways, from small home applications to the [...]

Oxygen LPG vs. oxygen acetylene

Oxygen mixed with a fuel gas is one of the most widely used industrial thermal cutting processes, because it can cut material that is up to 250mm thick, is cost effective, and can be used either manually or mechanically. The two most widely used cutting fuels are LPG (propane) and acetylene, with acetylene being seen for years as the industry standard. However, recently many have questioned whether acetylene is better for cutting than propane or LPG and a debate in oxy-LPG vs. acetylene has emerged. Below, we compare the two and look at the advantages and disadvantages of each, so you can decide where you fall in the oxy LPG vs. oxy acetylene debate. Oxy LPG advantages • Propane has a greater total heat of combustion • Oxy propane is easy to obtain and cheaper • Propane is more stable. Oxy LPG disadvantages • Propane produces a lower flame temperature • There is increased pre-heat time • Propane flames are less focused and therefore piercing is slower • Propane can’t be used for gas welding because it doesn’t have a reducing zone • In terms of oxy propane vs. oxy acetylene, propane is often used when cut quality is not essential. Oxy acetylene advantages • Acetylene produces the hottest flame temperature for oxy fuel cutting and welding • The hotter temperature creates a quicker piercing of materials • Oxy acetylene can be used on sites with no power supply • It is quite a versatile process and can be used to weld most metals. Oxy acetylene disadvantages • Acetylene weld lines are rougher in appearance and need more finishing • Acetylene is unstable and expensive • Regarding oxy propane vs. oxy acetylene, there are more safety issues with oxy acetylene, because there is a naked flame. Oxy LPG vs. oxy acetylene – it's your call! Whichever side you choose in oxy lpg vs. oxy acetylene, don’t be sucked into charging rental costs on gas cylinders you’ll only [...]

Nitrogen gas bottle uses… more than just welding!

Welding with a nitrogen gas bottle For stainless steel tube welding, a nitrogen gas bottle is a perfect purge gas. You probably require nitrogen for your DIY welding projects or for your nitrogen plastics welding system, but you may not be aware that it has so many other uses. Nitrogen, whose symbol is N or N2, makes up no less than 78% of the Earth's atmosphere. It has no colour, odour, taste or toxicity and it is not flammable. It was officially isolated in the 18th century, but scientists knew about this element – crucial to biological life – long before this. The uses of a nitrogen are endless! You will be amazed at just how many uses a nitrogen gas bottle has. Use this versatile inert gas to superbly inflate tyres, improving tyre life and also minimising the risk of tyre blowouts. Or use your nitrogen to mix it with CO2 for your beer making. In the form of a nitrogen gas bottle, N2 is a seriously handy gas. It can be used in food packaging, wine making, air conditioning and scientific testing – and that's just the start of the possible uses. Nitrogen gas bottles are commonly used in industry for blanketing or purging, which involves the removal of unwanted or unstable gases or compounds, while nitrogen is also used to control the temperature of computer CPUs and for making light bulbs. Ever played with a paintball gun? Nitrogen have been used to supply the power source, even if you may think that carbon dioxide is the obvious choice. A nitrogen gas bottle can also be used for plasma cutting and in combination with argon for a shielding gas. Nitrogen is also used in combination with CO2 in cold brewing coffee. Whatever you need a nitrogen gas bottle for, you can be sure that, here at Rent Free Gas, we have all your requirements covered. Give us a call 0404 677 187  today.

Welding made easy with MIG gas

Welding using a metal inert gas (MIG) welder is really not difficult. Using a MIG welder is easy with the right MIG gas. Plenty of MIG gas options MIG welding is a simple, easy and popular welding process that uses electricity and MIG gas to melt and join metal. Luckily, when it comes to picking the right gas to use, there are plenty of options. Why do you need MIG gas? You need MIG gas in order to shield the weld from the air. But it’s not just the case of picking a MIG gas randomly. Basically, you need to make the right choice of MIG gas to: Determine the depth of the weld Determine the characteristics of the welding arc Determine the weld’s mechanical properties. How to get your gas choice right Rent Free Gas can help advise you as to what is the best MIG gas to use in your particular case. Argon can be used for your MIG welding, especially for steel and aluminium, and Argon 5-2 is also great for mild steel welding. Some other common MIG gases are CO2 and Oxygen, with Helium being the least common. Often, these gases will be fixed together, although Argon and carbon dioxide can be used as a pure MIG gas. In many cases, up to three MIG gases can be combined; typically Argon, CO2 and Helium, or Argon, CO2 and O2. Pure CO2 as a MIG gas can produce the deepest penetrating welds, although the welds can also be rough. A MIG gas made up of CO2 and Argon is very popular, although if you are welding stainless steel, the best MIG gas mix is probably mostly Argon and CO2. MIG gas advantages Welding with MIG gas is great, because: Welding a large number of metals and thicknesses is easy The welt bead is good Weld splatter is minimised Welding with MIG gas is easy to learn and master. MIG gas disadvantages Welding with [...]

How to work safely with compressed gases

Whether using a nitrogen gas bottle or some other type of compressed gas, it’s certain compressed gases need to be handled with care. The rent free gas bottles we supply contain gas under pressure (otherwise known as compressed gas), and all the gases we supply are non-flammable. However it is important to always carefully consider your safety and the safety of others when buying compressed gases. Safely store your rent free gas bottles When you purchase your gas cylinders, you need to think carefully about where you plan to store them, how you will encourage proper ventilation when they’re in use, and how to transport them properly without doing any damage. How to store bottles properly If you have rent free gas cylinders, even if you plan to use them the next day, chances are you might need to store them for a few hours. To do this, make sure they are secured, so they cannot fall over and stored in a place that is away from high temperatures – so be wary of a garage that gets too hot – and make sure they are placed according to health and safety regulations. Ensuring proper ventilation When using gas, make sure you are doing it in a properly ventilated area. Make sure any ducts or hoods in the space are suited for that specific gas use before you put it into operation. Make sure systems are explosion and corrosion proof so you don’t do damage to the area you’re working in. Also take care to wear proper eye, ear, body and face protection so you don’t hurt yourself. Transporting gas bottles safely When moving rent free gas bottles from place to place, always have the valve caps on them for protection. Be careful when lifting the cylinders too – don’t pull them by their valve caps or roll or slide them along the ground, as these actions can cause them damage. However, if moving a short distance, you can safely roll the cylinder on the bottom [...]

Common uses of welding gas bottles

Rent free welding gas bottles are the easy and more cost-effective way to complete your welding projects. If you currently rent a bottle, but you don't have any welding projects on your bench for a month or two, you're literally wasting money every day. Make the easy leap to buying your own bottle, because rent free welding gas bottles are the answer! Common welding gas bottles and their uses: Argon Argon is used as an inert shielding gas, protecting your weld from contamination from the air. By properly using an Argon rent free welding gas bottle, typically used for a TIG welder, you ensure that air will not come in contact with the molten weld puddle and react with the metal. Argon 5-2 Different to Argon rent free welding gas bottles, Argon 5-2 can be used when you are welding mild steel, in the form of MIG welding. Basically, Argon 5-2 rent free welding gas bottles contain a mix of Argon and also CO2 and Oxygen. Oxygen Oxygen rent free welding gas bottles are used for what is called Oxygen & LPG welding (or Oxyacetylene), otherwise known as Oxy-fuel welding. Basically, this means you are using the oxygen in your rent free welding gas bottle as the combustion method. It's also great for bending, heating, surfacing and brazing, as the welder has a lot of control over the heat. CO2 Did you know that CO2 rent free welding gas bottles are most commonly used as a reactive gas for MIG welding, and are the only ones that can be used without an inert gas? CO2 rent free welding gas bottles are also a very inexpensive shielding gas, and provide for deep weld penetrations useful for welding thick materials. Nitrogen Another inert gas, like Argon or C02, is nitrogen, which in the form of a rent free welding gas bottle means you eradicate oxygen from the welding environment and prevent oxidation. Nitrogen rent free welding gas bottles are increasingly popular [...]

Saving money with rent free welding gas bottles

In any market, the debate between renting and owning is a struggle. In the current housing market, economists go back and forth about the wisdom of buying when renting could make just as much or more economic sense. Some refuse to buy a new car when a comfortable lease seems to be a great deal. When it comes to your welding gas cylinders, however, it’s clear sense to buy rather than rent. Whether you’re an enthusiast welder or sourcing materials for your business, owning rent free welding gas bottles will save you money every time. Rent free welding gas cylinders make sense If you’re a regular welder, the expense of renting gas cylinders adds up quickly; if you run a garage or machine shop, the costs can be monumental. While a backyard hobbyist might go through a bottle every month or so, a professional welder can easily go through a bottle in a couple of days. On average, the purchase of a gas bottle is the equivalent of between about one or two years of rental. That may sound like a lot, but considering the life of use you’ll get out of a gas cylinder, the figures speak for themselves. Lifetime savings with rent free bottles Industrial gas cylinders need to be retested every 10 years. At that point, they must be hydrostatically tested before they can legally be refilled. As long as they pass testing at that point, the cylinder is good for another 10 years. This is our cost, not yours. Many gas cylinders, given the proper amount of care and maintenance, last for decades. The value-added aspect of having the cylinders delivered and swapped over as opposed to having to constantly haul and exchange rented cylinders, makes the decision to buy significantly more appealing. Some buyers worry that owning bottles might leave them stranded, if technology or standards change. As you own the cylinder you are free to sell it or have [...]