What pressure can a MC331 or MC338 trailer hold?

The MC331 and MC338 trailers are specifically designed for transporting liquefied gases under pressure, such as anhydrous ammonia and propane. The correct answer reflects the maximum pressure capacity of these trailers, which is typically designated at 500 psi. This rating is critical because it indicates the safety and structural integrity parameters that the trailer can withstand during transportation.

Understanding the pressure specifications is essential for anyone working with these types of trailers, as it directly relates to the safe handling, storage, and transport of hazardous materials. Exceeding the designated pressure during transport could compromise the trailer's structural integrity, leading to potential ruptures or leaks, which pose serious safety risks.

Thus, the figure of 500 psi aligns with industry standards and safety regulations and is a critical factor in operational procedures for transporting hazardous materials.