Scuba tanks are an essential component of any scuba diver’s equipment. Although they don't contain air, they have a lot of gas. This is usually more than what 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. Below are the main types, as well as their sizes.
scuba tanks contain no air
Standard aluminum 80 cylinders can hold 77 cubic feet of air. Trimix, which is a type diving gas, has a 10 to 20% lower capacity than air. A higher maximum operating pressure doesn’t necessarily mean that there is more air. However, manufacturers tend to exaggerate the tanks' capacities. It is therefore important to check the capacity of each individual cylinder against the actual volume.
They have more gas than water and contain more free gas.
Technical divers divers use different mix gases to divers than recreational divers. Therefore, their true air- and Trimix capacity is less than their water 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. Use the Z Factors to determine the correct mixed gas capability.
They are made of steel or aluminum
When choosing between a steel and an aluminum scuba tank, consider which is more suitable for a divers' needs. Steel tanks are more durable, and can withstand deeper diving. But, durability comes at a cost. Aluminum tanks can experience structural fractures faster and can pose a danger. A steel tank is more expensive than an aluminum tank. But, aluminum tanks are now the industry standard.
You can get them in many sizes.
Two materials can be used to build a scuba tank: 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. 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 should be checked regularly
There are many ways to inspect your scuba tank. Hydrostatic testing is typically done by stamping into the tank's neck. A visual inspection is also a good way to find any corrosion or contamination. Tumbling is another method to inspect the tank's condition. To remove dirt, debris and other contaminants, you can tumble the tank by filling it with media. If the tank sounds rattly, it may mean it needs to be cleaned.