+-----+-------------------------------------------------------------------+
|Horse| |
|Power| Diameter of Stack in Inches |
+-----+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
| |36 |42 |48 |54 |60 |66 |72 |78 |84 |90 |96 |102|108|114|120|132|144|
+-----+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
| 100 |.64| | | | | | | | | | | | | | | | |
| 200 |.55|.62| | | | | | | | | | | | | | | |
| 300 |.41|.55|.61| | | | | | | | | | | | | | |
| 400 |.21|.46|.56|.61| | | | | | | | | | | | | |
| 500 | |.34|.50|.57|.61| | | | | | | | | | | | |
| 600 | |.19|.42|.53|.59| | | | | | | | | | | | |
| 700 | | |.34|.48|.56|.60|.63| | | | | | | | | | |
| 800 | | |.23|.43|.52|.58|.61|.63| | | | | | | | | |
| 900 | | | |.36|.49|.56|.60|.62|.64| | | | | | | | |
|1000 | | | |.29|.45|.53|.58|.61|.63|.64| | | | | | | |
|1100 | | | | |.40|.50|.56|.60|.62|.63|.64| | | | | | |
|1200 | | | | |.35|.47|.54|.58|.61|.63|.64|.65| | | | | |
|1300 | | | | |.29|.44|.52|.57|.60|.62|.63|.64|.65| | | | |
|1400 | | | | | |.40|.49|.55|.59|.61|.63|.64|.65|.65| | | |
|1500 | | | | | |.36|.47|.53|.58|.60|.62|.63|.64|.65|.65| | |
|1600 | | | | | |.31|.43|.52|.56|.59|.62|.63|.64|.65|.65| | |
|1700 | | | | | | |.41|.50|.55|.58|.61|.62|.64|.64|.65| | |
|1800 | | | | | | |.37|.47|.54|.57|.60|.62|.63|.64|.65| | |
|1900 | | | | | | |.34|.45|.52|.56|.59|.61|.63|.64|.64| | |
|2000 | | | | | | | |.43|.50|.55|.59|.61|.62|.63|.64| | |
|2100 | | | | | | | |.40|.49|.54|.58|.60|.62|.63|.64| | |
|2200 | | | | | | | |.38|.47|.53|.57|.59|.61|.62|.64| | |
|2300 | | | | | | | |.35|.45|.52|.56|.59|.61|.62|.63| | |
|2400 | | | | | | | |.32|.43|.50|.55|.58|.60|.62|.63| | |
|2500 | | | | | | | | |.41|.49|.54|.57|.60|.61|.63| | |
|2600 | | | | | | | | | |.47|.53|.56|.59|.61|.62|.64|.65|
|2700 | | | | | | | | | |.45|.52|.55|.58|.60|.62|.64|.65|
|2800 | | | | | | | | | |.44|.59|.55|.58|.60|.61|.64|.65|
|2900 | | | | | | | | | |.42|.49|.54|.57|.59|.61|.63|.65|
|3000 | | | | | | | | | |.40|.48|.53|.56|.59|.61|.63|.64|
|3100 | | | | | | | | | |.38|.47|.52|.56|.58|.60|.63|.64|
|3200 | | | | | | | | | | |.45|.51|.55|.58|.60|.63|.64|
|3300 | | | | | | | | | | |.44|.50|.54|.57|.59|.62|.64|
|3400 | | | | | | | | | | |.42|.49|.53|.56|.59|.62|.64|
|3500 | | | | | | | | | | |.40|.48|.52|.56|.58|.62|.64|
|3600 | | | | | | | | | | | |.47|.52|.55|.58|.61|.63|
|3700 | | | | | | | | | | | |.45|.51|.55|.57|.61|.63|
|3800 | | | | | | | | | | | |.44|.50|.54|.57|.61|.63|
|3900 | | | | | | | | | | | |.43|.49|.53|.56|.60|.63|
|4000 | | | | | | | | | | | |.42|.48|.52|.56|.60|.62|
|4100 | | | | | | | | | | | |.40|.47|.52|.55|.60|.62|
|4200 | | | | | | | | | | | |.39|.46|.51|.55|.59|.62|
|4300 | | | | | | | | | | | | |.45|.50|.54|.59|.62|
|4400 | | | | | | | | | | | | |.44|.49|.53|.59|.62|
|4500 | | | | | | | | | | | | |.43|.49|.53|.58|.61|
|4600 | | | | | | | | | | | | |.42|.48|.52|.58|.61|
|4700 | | | | | | | | | | | | |.41|.47|.51|.57|.61|
|4800 | | | | | | | | | | | | |.40|.46|.51|.57|.60|
|4900 | | | | | | | | | | | | | |.45|.50|.57|.60|
|5000 | | | | | | | | | | | | | |.44|.49|.56|.60|
+-----+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
FOR OTHER STACK TEMPERATURES ADD OR DEDUCT BEFORE MULTIPLYING BY
HEIGHT ÷ 100 AS FOLLOWS[52]
For 750 Degrees F. Add .17 inch.
For 700 Degrees F. Add .14 inch.
For 650 Degrees F. Add .11 inch.
For 600 Degrees F. Add .08 inch.
For 550 Degrees F. Add .04 inch.
For 450 Degrees F. Deduct .04 inch.
For 400 Degrees F. Deduct .09 inch.
For 350 Degrees F. Deduct .14 inch.
[Graph: Horse Power of Boilers against Diameter of Stack in Inches