It is well acknowledged that the scuba diving tank is a canister that supplies air to the diver while underwater. But further to performing that apparently simple, singular role there is much diversity. For a plane metal cylinder, diving tanks have an astonishing number of variations.
With the exemption of certain exclusive models, all dive tanks are prepared from either aluminium or a steel alloy. Specialized sport diving, military applications and technical diving will occasionally use a chrome molybdenum alloy. All styles have their own positive and negative points.
Aluminium tanks are the lightest, although the notable difference below water is minimal. The disparity becomes more significant after taking into account the amount of effort that's involved in shifting them between dive trips. Aluminium air tanks also commonly have positive buoyancy that may need to be remunerated for with the addition of weights. This detail somewhat puts a stop to their lighter weight advantage verses that of the steel tanks.
Aluminium tanks are typically less costly than steel and more widespread, but the latter are likely to have a longer shelf life. Suitability maintained steel tanks can last thirty years or more. Many dive stores will decline to fill an aluminium tank over fifteen years of age.
Steel dive tanks were by tradition heavier, but a great deal less prone to rupture or puncture, denting or scratching. Modern-day steel tanks are to a great extent nearer in weight to aluminium ones, as they can be prepared thinner while maintaining ample stableness. More significantly, the threads on the neck of a steel tank are much less liable to get exposed from constant replacement of the regulator kit.
Although a steel cylinder can rust in the shape of iron oxide, aluminium can corrode as well, creating aluminium oxide. Neither is of serious risk to your health, but both ought to be maintained at regular intervals to abolish any contaminants. Aluminium will need this at less frequent intervals.
The vast majority of dive tanks hold approximately eighty cubic feet of compressed air. A variety of outsized models do exist, for those larger divers or anyone that needs an extra large capacity for extended dives.
Auxiliary tanks, most often referred to as pony tanks are needed as a back-up in case the main is emptied or fails. Auxiliary tanks can hold approximately sixty-five cubic feet of compressed air. Pony tanks tend to be secured with a separate belt.
Any scuba diving tank, suitably cared for, will last for many years of dependable service. Bearing in mind what actually depends on it; take the time to research your acquisition carefully.
| Darren Lintern writes extensively for www.andallabout.com, a popular informational website that provides helpful tips, advice, and resources on many scuba diving topics including Scuba Diving Masks, and Scuba Diving Locations Article Source: http://EzineArticles.com/?expert=Darren_Lintern |
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