What is the pressure range of the IM-102 inter-modal tank?

• A. 25.4-100 psi
• B. 14.5-25.4 psi
• C. 0-5 psi
• D. 100-150 psi

Answer: (B)

IM-102 inter-modal tanks are designed as non-pressurized cargo tanks for liquids, so their operating pressures stay well below those of high‑pressure tank cars. They are built to withstand a maximum working pressure around 25 psi, and the normal service range is about 14.5 to 25.4 psi. This range ensures there’s enough positive pressure to prevent vacuum during discharge while staying within the tank’s design limits. Pressures much lower (0–5 psi) would imply near-vacuum conditions, which isn’t typical for IM-102 service, and pressures far above 25 psi would require a high‑pressure design that these tanks do not have. Therefore, the IM-102 inter-modal tank operates roughly between 14.5 and 25.4 psi.