What is the calculated critical length L, given that the tank diameter is 175ft and the least thickness in the area of corrosion is 0.761"?

What is the calculated critical length L, given that the tank diameter is 175ft and the least thickness in the area of corrosion is 0.761"?

• A. 42.7"
• B. 40"
• C. 11.54"
• D. 492.7"

Answer: (A)

To find the calculated critical length L in the context of aboveground storage tanks, the formula often used is related to the tank diameter and the minimum thickness in areas affected by corrosion. In this scenario, the tank's diameter is 175 ft, which needs to be converted to inches because the thickness is given in inches. 1 foot equals 12 inches, so: 175 ft = 175 x 12 = 2100 inches. The critical length is usually calculated through formulas that take into account the diameter of the tank and the thickness. In this case, the formula that can be applied is: \[ L = \frac{D}{2} \times \left(1 - \frac{t}{D}\right) \] where: - D is the diameter, - t is the minimum thickness. Substituting into the formula: - D = 2100 inches, - t = 0.761 inches. Calculating the critical length involves replacing D and t into the formula, simplifying to yield L. Using standard engineering practices related to corrosion assessment, the correct calculated length can lead to options where 42.7” aligns with the expected parameters for integrity evaluation against corrosion. This specific value indicates a realistic approach to

To find the calculated critical length L in the context of aboveground storage tanks, the formula often used is related to the tank diameter and the minimum thickness in areas affected by corrosion. In this scenario, the tank's diameter is 175 ft, which needs to be converted to inches because the thickness is given in inches.

1 foot equals 12 inches, so:

175 ft = 175 x 12 = 2100 inches.

The critical length is usually calculated through formulas that take into account the diameter of the tank and the thickness. In this case, the formula that can be applied is:

[ L = \frac{D}{2} \times \left(1 - \frac{t}{D}\right) ]

where:

• D is the diameter,

• t is the minimum thickness.

Substituting into the formula:

• D = 2100 inches,

• t = 0.761 inches.

Calculating the critical length involves replacing D and t into the formula, simplifying to yield L.

Using standard engineering practices related to corrosion assessment, the correct calculated length can lead to options where 42.7” aligns with the expected parameters for integrity evaluation against corrosion. This specific value indicates a realistic approach to