From 150-lb cylinders, the maximum sustained gas withdrawal rate per degree Fahrenheit is what?

From 150-lb cylinders, the maximum sustained gas withdrawal rate per degree Fahrenheit is what?

• A. Zero
• B. One pound per day per degree Fahrenheit
• C. Five
• D. Two pounds per day per degree Fahrenheit

Answer: (B)

Gas cylinder withdrawal rates are controlled because the pressure inside a chlorine cylinder depends strongly on temperature. As temperature rises, pressure increases, so withdrawing gas too quickly can create unsafe conditions or deplete the cylinder faster than safe handling allows. For 150-lb chlorine cylinders, the standard guideline sets a maximum sustained withdrawal rate that scales with ambient temperature: one pound per day for each degree Fahrenheit of temperature. So, at 70°F you’d plan for about 70 lb/day; at 40°F, about 40 lb/day. This per-degree rule helps keep withdrawal within safe limits across typical temperatures. The other options either imply zero withdrawal, or rates that do not align with the established safety guideline.

Gas cylinder withdrawal rates are controlled because the pressure inside a chlorine cylinder depends strongly on temperature. As temperature rises, pressure increases, so withdrawing gas too quickly can create unsafe conditions or deplete the cylinder faster than safe handling allows. For 150-lb chlorine cylinders, the standard guideline sets a maximum sustained withdrawal rate that scales with ambient temperature: one pound per day for each degree Fahrenheit of temperature. So, at 70°F you’d plan for about 70 lb/day; at 40°F, about 40 lb/day. This per-degree rule helps keep withdrawal within safe limits across typical temperatures. The other options either imply zero withdrawal, or rates that do not align with the established safety guideline.