Storage tanks, or more specifically api storage tanks, are tanks that are used to hold and store either compressed gasses or liquids. In the United States though, there is typically a further distinction between the two because storage tanks in the United States are more commonly considered to be using very little or no pressure at all. The tanks which do make use of pressure are more commonly labeled and marketed as pressure vessels.
At the beginning of the shopping journey, this difference may seem minuscule or irrelevant, but the further you go down the rabbit hole the more clear and distinguished this difference becomes. You must shop in the proper category for api storage tanks in order to get the proper equipment and parts, just as you must with chemical storage tanks as well. In spite of these differences, there is one aspect of api storage tanks and pressurized vessels that share a common ground. If you want the highest quality available you want to get your product in stainless steel.
While stainless steel storage tanks are not always the first thing that comes to mind when one is deciding whether or not an api storage tank is of quality, but it very well should be. Carbon steel, stainless steel, aluminum, and copper are four of the most common types of metal used in the U.S. construction industry. While this is do to common practices, steel alone has been used to store and transport water for an impressive 150 years, just going to show its reliability. Although often it is thought of as a single completely regulated product, it is important for one to remember that stainless steel, by definition is a generic name for several different steels that all are a minimum of 10.5 percent chromium by mass. So although not always entirely the same, a stainless steel pressure vessel is always reliable.
Just make sure you are purchasing from a company that produces in stainless steel that is up to par with your wants and needs, whether for a horizontal pressure vessel, a vertical pressure vessel, or even a stainless steel chemical tank, surely there will be a product that works for both you and you and your business. Just make sure you do your s=research and try to find a reliable company that cares not only about your specific purchases, but also you as an individual customer.