Stainless Steel Tanks
Some applications will require stainless steel as a material choice due to its unique characteristics. It is well suited for the storage of corrosive materials or in environments such as food, marine, water or pharmaceuticals where any reaction or contamination of the stored material is to be avoided.
Our large manufacturing facilities allow us to fabricate large and complex solutions in a variety of stainless grades, the most popular being
304: 304 is an austenitic stainless steel. It is magnetic, but less magnetic than steel. It has a higher corrosion resistance than regular steel and is widely used because of the ease of working.
316: 316 is an austenitic grade second only to 304 in commercial importance. 316 stainless steel contains an addition of molybdenum that gives it improved corrosion resistance. This is particularly apparent for pitting and crevice corrosion in chloride environments.
316L: 316L stainless steel, sometimes referred to as A4 stainless steel or marine grade stainless steel, is the second most common austenitic stainless steel after 304/A2 stainless steel. 316L is the low carbon version of 316 stainless steel. When cold worked, 316 can produce high yield and tensile strengths similar to Duplex stainless grades.
Duplex: Duplex stainless steels are designed to provide better corrosion resistance, particularly chloride stress corrosion and chloride pitting corrosion, and higher strength than standard austenitic stainless steels such as 304 or 316. The main differences in composition, when compared with an austenitic stainless steel is that the duplex steels have a higher chromium content, 20–28%; higher molybdenum, up to 5%; lower nickel, up to 9% and 0.05–0.50% nitrogen. They are used extensively in the offshore oil and gas industry.
To ensure the integrity of both the inner and outer tank a small pressure is applied to the space between the two tanks, this is known as the interstitial space.