🔍 Key Concepts

• Cargo hose pressure rating requirements for tank barges • Meaning of static head vs shut-off head of a cargo pump • Where cargo hose design/maintenance standards appear in 46 CFR

💭 Think About

• Think about the worst pressure the cargo hose might realistically see during loading or discharging. Which condition creates the maximum pressure in the hose? • How does the pump behave when valves are closed and liquid is not moving? What is that condition called, and what does it do to pressure? • Look carefully at which answers mention a fixed psi value only versus those that relate hose strength to pump characteristics. Which seems more consistent with how regulations are usually written?

✅ Before You Answer

• Verify how shut-off head is defined in relation to pump discharge pressure. • Check if the regulation ties the hose rating to the maximum discharge pressure of the pump system, not just a minimum psi. • Confirm whether the rule adds or subtracts static head from the shut-off head when determining the hose pressure requirement.