Scuba tanks are a basic component of any scuba diver's kit. Although they don't contain air, they have a lot of gas. This is usually more than what they can hold. The size of a tank will depend on what type and type of diving it is. Below are the main types, as well as their sizes.
scuba tanks contain no air
The standard aluminum 80 can holds 77 feet3 air. Trimix, a dive gas, is 10-20% smaller than air. A higher maximum operating pressure doesn’t necessarily mean that there is more air. Manufacturers tend to overstate their tanks' capacity, though. Hence, you should compare the capacity of each cylinder against the actual volume of air in it.
They are capable of storing more free gas that their water capacities.
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. Heliair 10/50, on the other hand, has a true volume of 216 ft3 and Double HP117 cylinders a volume of 235ft3. To determine the correct mixed gas capacity, use the Z Factors for SCUBA tables.
They are made of steel or aluminum
Consider the needs of divers when choosing between an aluminum or steel scuba tank. Steel tanks can withstand deeper dives and are more durable. This durability comes at 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. But, aluminum tanks are now the industry standard.
They are available in various sizes
Two materials are used to make scuba tanks: aluminum and steel. Steel tanks are lighter than aluminum and can last for longer. They also tend to weigh more. Aluminum tanks are better for those who plan on diving a lot and have a weight belt. Aluminum tanks are lighter than steel tanks. You will need to consider your weight requirements when purchasing an aluminum tank. Steel tanks are ideal for drysuit diving or local scuba diving.
They must be inspected often
There are many methods to test your scuba tanks. Hydrostatic testing is often done beneath the neck of a tank. An inspection visually can help you detect corrosion or contamination. Tumbling is another option to assess the condition and health of your tank. Tumbling involves filling the tank with media and spinning it for a time to get rid of dirt and other contaminants. If the tank's sound is unusual, it might be an indication that it needs to get cleaned.