Steam Systems

Question 1

What are the problems when a boiler operates at less than design pressure?

Answer 1

Greater specific volume
Decreased separation area
Lower quality of steam

Question 2

Name 4 drip station locations on steam lines

Answer 2

Elevation changes
Changes of directions
End of mains
In front of control valves

Question 3

What is the problem with under sizing steam pipes?

Answer 3

Lower pressure to steam users
Not enough volume steam
Water hammer and erosion

Question 4

Why is it important to vent air from steam piping systems?

Answer 4

If not it can:
Lower steam Temperature
Prolong start up
Increase corrosion

Question 5

Name 3 types of pressure reducing valves

Answer 5

Direct acting
Pilot operating
Pneumatic or electric

Question 6

Name 3 types of steam traps

Answer 6

Mechanical
Thermostatic
Kinetic energy

Question 7

What is the purpose of a steam trap?

Answer 7

To remove condensate within the system

Question 8

What are the most common steam traps in breweries?

Answer 8

Mechanical (float with thermostatic valve)

Question 9

Give 4 reasons for returning steam condensate

Answer 9

Water already treated
Temperature still warm to hot
High cost of condensate disposal avoided
Water charges are lowered (not using a ton of fresh water)

Question 10

What is stall in a steam supplied heat exchanger?

Answer 10

When necessary pressure differential across a drainage device becomes negative, causing condensate to pool inside boiler