# What is the difference between superheated and saturated steam?

**Saturated**(dry)

**steam**results when water is heated to the boiling point (sensible heating) and then vaporized with additional heat (latent heating). If this

**steam**is then further heated above the

**saturation**point, it becomes

**superheated steam**(sensible heating).

A.

### What is the temperature of steam?

At lower pressures, such as in the upper atmosphere or at the top of high mountains, water boils at a lower temperature than the nominal

**100 °C**(**212 °F**) at standard pressure. If heated further it becomes superheated steam.#### Is Steam wet or dry?

In the case of**wet**, or saturated**steam**(100%**dry**), it contains 100% of the latent heat available at that pressure. Saturated water, which has no latent heat and therefore 0% dryness, will therefore only contain sensible heat. One may ask if**steam**dryness can rise above 100%?#### Can you burn steam?

This energy (as heat) is released when the**steam**condenses to water and the water cools to the temperature of skin.**Steam will**be substantially more injurious.**Steam**burns do have to potential to cause more damage than scalding. The reason has to do with the latent heat of vaporization.#### What is the temperature of steam from boiling water?

The degree of hotness is defined by its temperature. When the water is boiling its temperature is**100°C**(**373.15K**) under atmospheric pressure. After that the heat provided is latent heat which only changes the phase of the water (to steam). So the temperature of steam formed is also**100°C**unless the steam is superheated.

B.

### What is the temperature of 30 psi steam?

Saturated Steam Temperatures

Pressure | Temperature | Temperature |
---|---|---|

(p.s.i) | (°F) | (°C) |

26 | 268.3 | 131.3 |

28 | 271.2 | 132.9 |

30 | 274.1 | 134.5 |

#### How many BTU's are in one pound of steam?

1 pound of steam is equal to**970 BTU**(or an easy to remember rule of thumb is 1 pound of steam is equal to**1000 BTU**. 1 pound of water is equal to a 16 oz tall boy (by volume)….when you heat that tall boy hot enough to make steam it expands almost 1700 times its original volume.#### What is psig stand for?

pounds per square inch gauge#### Is PSI psia or psig?

For example, a bicycle tire pumped up to 65**psig**in a local atmospheric pressure at sea level (14.7**psia**) will have a pressure of 79.7**psia**(14.7**psi**+ 65**psi**). When gauge pressure is referenced to something other than ambient atmospheric pressure, then the units would be pounds per square inch differential (psid).

Updated: 4th November 2019