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steam heat risers sizing

Norm Harvey
Norm Harvey Member Posts: 684
When you say the sizing requires 2.5 do you mean the existing main size is 2.5?

I would use 2, 2" X 24" nipples comming out of the boiler (provided you have the height) and after your 2" horizontal piping you use a 2" X 3" 90 degree fitting into a drop header. Out of the 3" drop header you can have a 3" x 2.5" tee to go to your existing mains.

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  • Brian K_3
    Brian K_3 Member Posts: 2
    steam boiler riser sizing

    How soon after exiting a steam boiler should the riser sizing be increased? The new Utica boiler has 2-2" tappings but the sizing requires 2- 2.5" minimum risers. Should they be increased immediately as with a close nipple? Can they be longer, say 8-10"?
  • Brad White_9
    Brad White_9 Member Posts: 2,440
    Sooner rather than later

    Drop the velocity as soon as you can.... As a bonus of good practice, how about a dropped header to give the steam a second chance? If height is an issue that can give benefits across the board.

    Nice dry steam off the top of a dropped and well-dripped header....
  • Brian K_3
    Brian K_3 Member Posts: 2

This discussion has been closed.