Stainless steel is an excellent material to use when fabricating wine storage tanks, beer fermentation tanks or bright tanks, olive oil tanks, bio-chemical processing tanks because of its high corrosion resistance characteristic. But we have seen a lot of stainless steel tanks that are used for food storing or processing to fail.
What are the types of failures encountered in vertical still stainless steel tanks? Let us look at the 4 common stainess steel tank failures.
1.Top one failure may seem ridiculous but it is very true: RUST.
Below pictures show rusts and stains at tank inside, on tank surface and top entry lid.
The rusts may possibly caused by not good manufacture practice, other still material attach or environment. Stainless steels are just tending to corrode less than most steels. Dirty water containing other metal materials can cause a tank to rust very quickly. Please refer to our previous article for more reasons causing rusts on stainless steel tanks:
2. Second nightmare for a tank user is LEAKING.
Below picture shows a wine tank leaking at side manhole. Think about how much is the lost wine, how much energy and workforce is wasted. How the problem arises? Production defect, sealing fatigue or crevices at welds?
3. Implode or suction of atmospheric pressure storage tanks has been a frequent occurrence. Look at the sucked in tanks. They ‘twist’ or dent. This happens because the tank is not properly vented. Please remember YOU CAN’T EMPTY A TANK WITHOUT SUFFICIENT VENTING PROVISIONS. It could be either an effective dual action breathing valve or an opened tank lid.
4. Collapse, the disaster for tank users. A collapsed tank is hazardous for both human beings and properties. Tank standing on legs is particularly susceptible to extreme conditions: very strong winds and severe earthquakes. Another factor we should not ignore is the tank design. Are the legs robust enough to hold the weight? Is the tank wall thick enough to go against strong wind conditions? Are many thoughts given to tank anchorage?
INTECHWELL has decades of experience in stainless steel tank design, fabricating, retrofitting and testing. We invite any comments so please do not hesitate to contact us if you have more to share. And we will shortly update on how to avoid these tank failures.
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