
Beer kegs have been used as fuel tanks for cars and trucks, with some people preferring the 'nostalgic look of a keg over modern fuel cells. However, there are some concerns about the safety and practicality of using a beer keg as a fuel tank. For example, beer kegs are not DOT-approved for use as fuel tanks, and there may be legal implications if the keg is stamped as the property of a brewer or manufacturer. Additionally, some people have raised concerns about the strength and durability of beer kegs, with some reports of kegs cracking or denting under pressure. Despite these concerns, many people have successfully converted beer kegs into fuel tanks for their vehicles, and there are online resources available for those interested in attempting this project.
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What You'll Learn

Beer kegs are durable and can withstand damage
Another user agreed, saying that keg shells are very strong and that anyone who thinks otherwise has not tried to cut into one or had enough to drink. They also stated that kegs are stronger than the stock plastic tanks found in Jeeps and other rigs. A different user shared that they had converted a keg into a charcoal grill, which is similar to converting it into a fuel tank in terms of durability.
However, some users have expressed concerns about the durability of kegs. One person mentioned that while kegs are strong, they can crack if hit hard enough. They shared that as kids, they used to beat kegs up and they would always crack instead of denting. This raises concerns about what could happen if a heavy vehicle hit the keg.
Despite these concerns, many people have successfully converted beer kegs into fuel tanks for their vehicles. One user shared that they had converted a 15.5-gallon aluminum keg into a fuel tank for their 37 Dodge pickup project. They appreciated the large 1/2" aluminum fill flange, which allowed them to install the filler neck, fuel pickup, and fuel return line directly into the keg without having to weld the fittings.
Another user shared a detailed process of converting a stainless steel beer keg into a fuel tank. They cut a hole in the top, welded on the necessary fittings, and mounted it to their car using four bolts through the lip of the keg. The user also mentioned that the mounting process was the easiest part, as it made the keg a structural part of the car.
In conclusion, beer kegs are durable and can withstand damage, making them a viable option for those considering converting them into fuel tanks. However, it is important to consider the potential risks and take the necessary precautions to ensure safety.
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They are made of stainless steel, which makes welding easier
Beer kegs can be converted into fuel tanks, and their construction material is one of the most important factors to consider. While some beer kegs are made of aluminium, others are made of stainless steel. Stainless steel beer kegs are easier to weld than their aluminium counterparts. This is because aluminium kegs have a large aluminium fill flange, which allows for the installation of the filler neck, fuel pickup, and fuel return line without welding. On the other hand, stainless steel kegs require welding to attach these components.
The process of converting a beer keg into a fuel tank involves cutting a hole in the top of the keg and welding on various components, such as a filler neck, fuel pickup, and fuel return line. Some people choose to use a plastic filler neck, while others opt for a stainless steel filler neck for added durability. It is important to note that the thickness of the aluminium or stainless steel used in beer kegs can vary, with some people noting that the aluminium in their keg is thicker than the aluminium used in fuel cells.
When converting a beer keg into a fuel tank, it is also important to consider the legal implications, as most kegs are stamped with the brewer or manufacturer's information. Additionally, it is crucial to ensure that the keg is properly cleaned and prepared before being used to store fuel. Some people choose to install a fuel sending unit, while others opt for a clear tube to serve as a fuel gauge.
The strength and durability of beer kegs are also important factors to consider when using them as fuel tanks. Some people have noted that beer kegs are stronger than regular steel gas tanks and are difficult to dent or crack. However, others have shared their experiences of cracking kegs by throwing them at rocks or hitting them with a 4,000-pound rig.
Overall, while beer kegs can be converted into fuel tanks, it is important to carefully consider the materials used, the welding process, and the strength and durability of the keg to ensure a safe and effective conversion.
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A keg is not DOT approved as a gas tank
While some people have converted beer kegs into gas tanks, a keg is not DOT-approved as a gas tank. The Department of Transportation (DOT) regulates the manufacturing and safety of all propane tanks that can be transported via road or rail. Both 1lb disposable and refillable propane tanks are examined by the DOT to ensure they were manufactured according to compliance. This means that they are legal to refill and transport.
The DOT requires certain conditions to be met while the tank is manufactured and before it is allowed to be refilled. These requirements and the tests to check for them are designed to ensure that the cylinder's walls can withstand a certain amount of internal and external pressure without weakening. Beer kegs are not manufactured according to these conditions and requirements.
Additionally, the DOT-approved gas cans are defined as containers with a capacity of 5 gallons or less and equipped with a spring-closing lid and spout cover, a means to relieve internal pressure, and a flash-arresting screen. Beer kegs, on the other hand, typically have a capacity of 5 gallons or more and do not come with the necessary equipment, such as a spring-closing lid and spout cover.
Furthermore, converting a beer keg into a gas tank comes with its own set of challenges and risks. For example, the tap connection would need to be welded to ensure that the gas remains in the keg. The filler process can also be challenging, as one person described having to find a filler that fit the specific dimensions of their keg.
Overall, while it may be possible to convert a beer keg into a gas tank, it is important to recognize that it is not DOT-approved and may not meet the necessary safety standards and regulations.
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A keg is not owned by the user, so there may be legal implications
Beer kegs have been used as fuel tanks, particularly for hot rods, giving them a "nostalgic look". However, it is important to note that a beer keg is not owned by the user and is the property of the brewer or manufacturer. Most kegs are stamped with "Property of [the brewer/manufacturer]", indicating ownership. Using a keg with this marking for personal purposes may have legal implications.
The legal implications of using a beer keg as a fuel tank may arise from the fact that the keg is technically the property of the brewer or manufacturer. By using it for personal purposes, such as converting it into a fuel tank, individuals may be violating the rights of the rightful owners. This could potentially lead to legal issues, including accusations of theft or misuse of property.
It is worth noting that some individuals have managed to find kegs without the "Property of" stamping, which they have then used for their projects. However, this does not negate the potential legal implications of using a keg that is not rightfully owned by the individual. Even without the explicit stamping, the kegs are still considered the property of the brewer or manufacturer, and using them without proper authorization could still lead to legal consequences.
To avoid potential legal issues, it is important to obtain permission from the brewer or manufacturer before using their kegs for personal projects. This could involve contacting the company and seeking their consent for the specific use case. Alternatively, individuals could purchase their own kegs, ensuring they have the legal right to use them as they see fit. This option may be more expensive, but it provides clarity and reduces the risk of legal complications.
In conclusion, while beer kegs may be structurally suitable for use as fuel tanks, it is important to consider the legal implications of using a keg that is not owned by the user. To avoid potential issues, it is advisable to either seek permission from the rightful owner or purchase a keg specifically for the intended purpose. By taking these steps, individuals can ensure their projects are both safe and legally compliant.
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A keg is more era-correct looking than a modern fuel cell
A beer keg can be converted into a fuel tank, and some people prefer the look of a keg over a modern fuel cell. One user on a hot rod forum noted that they were converting a beer keg into a gas tank for their 1937 Dodge pickup project because they felt it was "a lot more era-correct looking" than using a modern fuel cell. The user also noted that the thickness of the aluminum in their vintage keg was thicker than the aluminum used in modern fuel cells.
Another user on the same forum shared that they had successfully converted a beer keg into a gas tank for their rock crawler Toyota pickup. They noted that kegs are made of stainless steel, which makes welding them easier. They also suggested running a piece of clear tube down the outside of the keg to use as a fuel gauge.
However, it's important to note that converting a beer keg into a fuel tank may have legal implications, as most kegs are stamped with the brewer or manufacturer's information. Additionally, a keg is not DOT-approved as a gas tank, and there may be safety concerns, especially if the keg is not properly welded or secured.
Some users have also expressed concerns about the strength and durability of kegs, stating that they can crack or dent more easily than regular fuel cells. One user shared that they had successfully converted a keg into a fuel tank for their Baja Bug, but others cautioned that the kegs can crack if subjected to enough force.
Overall, while a beer keg may offer a more era-correct look for a hot rod or vintage vehicle, there are safety, durability, and legal considerations to take into account before using one as a fuel tank.
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Frequently asked questions
Yes, it is possible to convert a beer keg into a fuel tank.
Beer kegs are made of stainless steel, which makes them suitable for welding and conversion into fuel tanks. Some older kegs may be made of aluminium, which is also suitable but may require different welding techniques.
Beer kegs are cylindrical and made of strong materials, making them less likely to crack or dent than regular steel or plastic fuel tanks. They also have a large fill flange that allows for easy installation of the filler neck, fuel pickup, and return line.
Beer kegs are not DOT-approved for use as fuel tanks, and there may be legal implications if they are still stamped as the property of a brewery or manufacturer. Additionally, the tap connection may need to be welded shut to prevent leaks, and the thickness of the keg material may vary, affecting the conversion process.
It is important to ensure that the keg is thoroughly cleaned and dried before conversion. The filler spout, inlet, outlet, return, and vent lines will need to be installed, and a rollover valve is recommended for safety. The mounting process should be carefully planned to ensure the structural integrity of the keg and the vehicle.










































