Scuba tanks are an essential component of any scuba diver’s equipment. 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. Listed below are the main types of scuba tanks and their sizes.
scuba tanks contain no air
The standard aluminum 80 can holds 77 feet3 air. Trimix is a type of dive fuel that has a lower capacity than air. It can hold between ten and twenty percent more. A higher maximum service pressure does not necessarily mean more air. Manufacturers tend to overstate their tanks' capacity, though. You should therefore compare the capacity of each cylindrical against the actual volume.
They are capable of storing more free gas that their water capacities.
Technical divers use a different mix of gases than recreational divers. As such, their true air or Trimix capacities are lower than their actual waters capacities. Helium, which is more compressible and less elastic than air, means that their true air or Trimix capacities will be smaller than their water capabilities. Heliair 10/50's true air capacity is 216ft3 while double HP117 cylinders hold a true volume air volume at 235ft3. You can use the Z Factors of SCUBA tables to determine the correct mixed gases capacity.
They are made out of steel and aluminum
If you are faced with the choice between an aluminum and a steel scuba tank, make sure to consider what is best for your needs. Steel tanks are more robust and can withstand deeper underwater dives. This durability comes with a price. Aluminum tanks are more susceptible to structural fractures and can prove dangerous. A steel tank is more expensive than an aluminum tank. However, aluminum tanks have become the industry standard.
You can get them in many sizes.
Scuba tanks can be made from two materials: aluminum or steel. Steel tanks tend to be lighter and more durable than aluminum, but they are heavier. An aluminum tank may be better if you plan to dive frequently and need to carry a weight belt. But aluminum tanks are heavier than steel tanks. Before purchasing an aluminum tank, you need to be aware of your weight requirements. Steel tanks are excellent for drysuit diving as well as local scuba divers.
They must be inspected often
There are many ways to inspect your scuba tank. Hydrostatic testing is usually stamped into the metal beneath the neck of the tank. An inspection visually can help you detect corrosion or contamination. Tumbling is another way to check the condition of your tank. Tumbling involves filling it with media and spinning it for a certain period of time to remove dirt and other contaminants. If the tank sounds rattly, it may mean it needs to be cleaned.