No known tank failures attributed to brittle fracture have occurred at shell metal temperatures of what degree Fahrenheit and above?

No known tank failures attributed to brittle fracture have occurred at shell metal temperatures of what degree Fahrenheit and above?

• A. 60
• B. 40
• C. 20
• D. -20

Answer: (A)

Brittle fracture in storage tanks is a critical concern, particularly at lower temperatures. The phenomenon occurs when the material becomes more rigid and less ductile, leading to sudden failure without significant deformation. Research and historical data indicate that tank failures attributed to brittle fracture are rarely observed at shell metal temperatures of 60 degrees Fahrenheit and above. This threshold is significant because materials, especially structural steels, tend to maintain ductility and toughness within this temperature range, enabling them to absorb energy and deform instead of fracturing. The risk of brittle fracture increases as temperatures decrease, as the material toughness is compromised. Thus, above 60 degrees Fahrenheit, the likelihood of brittle fracture incidents is minimal, making this temperature a critical reference point in the context of tank design and operation. Other temperature options like 40, 20, or -20 degrees Fahrenheit represent lower thresholds where the risk for brittle fracture increases significantly, indicating that there is a greater likelihood of failures occurring at those temperatures. Understanding these temperature thresholds is crucial for tank inspectors and operators in maintaining the integrity and safety of aboveground storage tanks.

Brittle fracture in storage tanks is a critical concern, particularly at lower temperatures. The phenomenon occurs when the material becomes more rigid and less ductile, leading to sudden failure without significant deformation. Research and historical data indicate that tank failures attributed to brittle fracture are rarely observed at shell metal temperatures of 60 degrees Fahrenheit and above.

This threshold is significant because materials, especially structural steels, tend to maintain ductility and toughness within this temperature range, enabling them to absorb energy and deform instead of fracturing. The risk of brittle fracture increases as temperatures decrease, as the material toughness is compromised. Thus, above 60 degrees Fahrenheit, the likelihood of brittle fracture incidents is minimal, making this temperature a critical reference point in the context of tank design and operation.

Other temperature options like 40, 20, or -20 degrees Fahrenheit represent lower thresholds where the risk for brittle fracture increases significantly, indicating that there is a greater likelihood of failures occurring at those temperatures. Understanding these temperature thresholds is crucial for tank inspectors and operators in maintaining the integrity and safety of aboveground storage tanks.