The design pressure of an IM 101 portable tank is:

• A. 5 to 15
• B. 25.4 to 100
• C. 10 to 20
• D. 100 to 200

Answer: (B)

Design pressure is the maximum internal pressure the tank is built to safely contain during its service life. For IM-101 portable tanks, that design pressure is specified as a range from 25.4 psi up to 100 psi. This range reflects the types of liquids and service these tanks are intended for, balancing structural limits with practical pumping and unloading needs. The 25.4 psi lower bound ensures workable pumping without stressing the shell, while the 100 psi upper bound keeps the design within safe, code-approved limits for this tank class. The other ranges are either too low for IM-101 or exceed its rated capability, so they don’t fit the standard specification.