At what pressure and temperature is steam typically supplied in a low pressure system?

In a low-pressure steam system, the common pressure and temperature settings are designed to meet specific heating requirements while avoiding excessive pressure that could lead to safety concerns. The typical range for low-pressure steam is around 1 to 15 psig.

The correct choice indicates 1 psig at 215 °F, which accurately aligns with the conventional parameters for low-pressure steam applications. At 1 psig, the steam temperature of around 215 °F is consistent with low-pressure steam tables that define the relationship between pressure and temperature. This combination allows for efficient heating processes without the dangers that could accompany higher pressures and temperatures.

In contrast, the other options present pressures and temperatures that exceed the typical low-pressure ranges found in standard practice, making them unsuitable for classification as low-pressure systems. Therefore, the choice of 1 psig at 215 °F represents the expected operating conditions for low-pressure steam systems, which are designed to function safely and effectively at those levels.