Scuba tanks are a basic component of any scuba 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. Different types of diving require different tank sizes. Therefore, you need to make sure you choose the right tank for you based on what water you are going to be using. Listed below are the main types of scuba tanks and their sizes.
scuba tanks contain no air
The aluminum 80 standard cylinder holds 77 ft3 air. Trimix, which is a type diving gas, has a 10 to 20% lower capacity than air. Similarly, a higher maximum service pressure doesn't necessarily mean more air. However, manufacturers are known to overstate the capacity of their tanks. Therefore, it is important to compare each cylinder's capacity with the actual volume of air inside.
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. Helium, for instance, is much more compressible that air. Therefore, their true air capacity and Trimix capacity are less 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 are made of steel or aluminum
You should consider the divers' needs when choosing between an aluminium or steel scuba tanks. Steel tanks are more durable, and can withstand deeper diving. This durability comes at a price. Aluminum tanks are more susceptible to structural fractures and can prove dangerous. In addition, a steel tank costs more than an aluminum one. However, aluminum tanks have become the industry standard.
They come in a variety of sizes
Scuba tanks are made of two materials: steel and aluminum. Steel tanks are lighter, more durable and heavier than aluminum tanks. However, they tend to be heavier. A lightweight aluminum tank might be the best option if you intend to dive a lot or bring a weight belt. Aluminum tanks may not be as light as steel tanks so it is important to know your weight requirements before you purchase one. Steel tanks can be used for local and drysuit diving.
They must be inspected often
There are many options for checking your scuba diving tank. Hydrostatic testing is often done beneath the neck of a tank. You can also inspect the tank visually to detect corrosion and 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. It is possible that the tank is rattling or needs to be cleaned.