Scuba tanks should be a part of every diver's kit. Scuba tanks do not contain any air. However, they contain large volumes of free gas. This gas is typically greater than the water they can hold. There are many sizes that can be used for different types of diving. It is important to pick the right tank according to what kind of water you will be using. Here are the main types of Scuba Tanks and their sizes.
scuba tanks contain no air
The standard aluminum 80 cylinder can hold 77 feet3 of air. Trimix, a type of dive gas, has a ten to twenty-percent lower capacity than air. Similarly, a higher maximum service pressure doesn't necessarily mean more air. However, manufacturers tend to exaggerate the tanks' capacities. You should therefore compare the capacity of each cylindrical against the actual volume.
They are able to store more free gas than they can hold in water.
Technical divers use different mixture gases than recreational divers. The true air and trimix capacities of technical divers are smaller than their actual water capacity. For example, Helium is more compressible than air so their true air and trimix capacities are lower than their water capacities. The true air volume of Double HP117 cylinders is 235 ft3, while Heliair 10/50 cylinders have a true capacity of 216 Ft3. To determine the correct mixed gas capacity, use the Z Factors for SCUBA tables.
They can be made from steel or aluminum
It is important to decide which scuba tank is better for divers. Steel tanks can withstand deeper dives and are more durable. This durability comes with a price. Aluminum tanks can experience structural fractures faster and can pose a danger. In addition, a steel tank costs more than an aluminum one. However, aluminum tanks have become the industry standard.
They are available in different sizes
Scuba tanks are made from steel or aluminum. Steel tanks are lighter, more durable and heavier than aluminum tanks. However, they tend to be heavier. If you plan on doing a lot of diving and plan to bring a weight belt, it might be best to go with an aluminum tank. However, aluminum tanks are not as lightweight as steel tanks, so you should be aware of your weight requirements before purchasing one. Steel tanks are great for drysuit diving and local scuba diving.
They must be inspected regularly
There are many ways to inspect your scuba tank. Hydrostatic testing usually is done below the tank's neck. Visual inspections can be used to help detect corrosion or contamination. Tumbling is another way to check the condition of your tank. Tumbling involves filling the tank with media and spinning it for a time to get rid of dirt and other contaminants. It is possible that the tank is rattling or needs to be cleaned.