stack temperature

Howard_2

My stack temperature on a 70 HP boiler is around 475 degrees. My boiler room temperature is around 70 degrees. When is it time for me to clean my boiler?

Howard_2

steam header at the end of the line

I have 2 apt houses side by side with one house having the boiler. So this house has to heat two houses. I have two problems. My steam header at the very end of the line in the second house is less than 27 inches. I can actually grab the steam header with my hands.This part of the house gets steam last as this is the very end of the steam main. This entire line of apts (5 story) is much colder than the other three lines. Any suggestions. I want to do the work when it warms up.

Jim Davis

An article that Dan wrote a few years ago stated that when you are having trouble getting heat to the farthest point, lower your steam pressure. Lower pressure steam travels faster and I have seen this work over and over. The flue temperature should be at least 200 degrees higher than the steam temperature, so you are not too far off. Need to know what type of boiler-Atmospheric or Power burner? What pressure steam?

George_10

stack temp

When stack temperatures get very high that indicates a problem! The majority of your heat is going to the atmosphere and not to the water that you are converting to steam. A couple of things can cause this. One is excessive insulation on the water side (ie: scale formation) and excessive insulation on the burner side (ie: sooting)

When you have the opportunity to open the boiler, I would check both of these possible scenarios.

Sounds like your sending dollars up the chimmney.
Scott

Steamhead

Low Pressure and Main Vents

go hand in hand. Captain CO is right since the lower the steam pressure, the less the steam is compressed. It can take up more space. But for this to work properly, you must have proper vents at the end of that steam main. This way, the steam will fill the main first, then rise to all radiators at the same time.

Measure the length and diameter of each steam main you have, and tell us what vents are on them. We can tell you what vents you will need.

To Learn More About This Contractor, Click Here to Visit Their Ad in "Find A Contractor"