3.3

3.1416 in ²; 2546 psi

3.6

2827.4 in ² (19.6 ft ²)

3.7

2,120,550 lb

3.8

1 5/8 in, or 1.625 in

3.18

27,150 psi elastic limit

56,561 psi ultimate strength

3.19

610,725 lb

3.20

7,776,000 lb

3.21

1354 psi

3.22

t = 1.32 in; commercial size t = 1.50 in

3.27

1381 ft ²

3.28

115 boiler hp

3.30

269.4 10 ⁶ Btu/h

3.34

h at 900 psia saturated = 1195.4 Btu/lb

h at 900 psia and 950 F = 1480 Btu/lb

Degrees superheat = 418.02 F

3.35

17,518, 13,841, and 3200 Btu/h per square foot (Btu/h/ft ²); 88,543 Btu/h per cubic foot (Btu/h/ft ³)

4.10

2.09 lb of O ₂/lb of coal; 9.02 lb of air/lb of coal

4.15

28.71 percent

4.17

13.53 lb of air/lb of coal

4.18

12,336 Btu/lb

4.30

22.3 API

5.57

1.135 in of water theoretical (0.908 in of water available)

6.5

255.8 psi

6.6

6.5 psi low

6.20

3976 lb

8.34

43.3 psi

8.35

288.7 ft

8.36

840 ft ³; 1,451,520 in ³; 52,500 lb; 6302.5 gal

8.37

5891 gal

8.38

48.4 gpm; 2906 gph

8.39

130 min

8.40

9.12 h

8.41

256.6 psi; 593 ft

8.42

3757 gal

8.43

33 ft

8.44

112.5 psi

8.45

3.53 in in diameter

8.46

102 strokes per minute

8.47

15.15 hp

8.48

485.4 hp

8.49

motor size, 550 hp

input, 393.4 kW