Steam Flow (lbs./hr.) when steam gauge pressure is:

Orifice
Diam.

5
psi

10
psi

15
psi

25
psi

50
psi

75
psi

100
psi

125
psi

150
psi

200
psi

250
psi

300
psi

1/32

.47

.58

.70

.94

1.53

2.12

2.7

3.3

3.9

5.1

6.3

7.4

1/16

1.86

2.3

2.8

3.8

6.10

8.5

10.8

13.2

15.6

20.3

25.1

29.8

3/32

4.20

5.3

6.3

8.45

13.8

19.1

24.4

29.7

35.1

45.7

56.4

67.0

1/8

7.5

9.4

11.2

15.0

24.5

34.0

43.4

52.9

62.4

81.3

100.0

119.0

5/32

11.7

14.6

17.6

23.5

38.3

53.1

67.9

82.7

97.4

127.0

156.0

186.0

3/16

16.7

21.0

25.3

33.8

55.1

76.4

97.7

119.0

140.0

183.0

226.0

268.0

7/32

22.9

28.7

34.4

46.0

75.0

104.0

133.0

162.0

191.0

249.0

307.0

365.0

1/4

29.8

37.4

45.0

60.1

98.0

136.0

173.0

212.0

250.0

325.0

401.0

477.0

9/32

37.8

47.4

56.9

76.1

124.0

172.0

220.0

268.0

316.0

412.0

507.0

603.0

5/16

46.6

58.5

70.3

94.0

153.0

212.0

272.0

331.0

390.0

508.0

627.0

745.0

11/32

56.4

70.7

85.1

114.0

185.0

257.0

329.0

400.0

472.0

615.0

758.0

901.0

3/8

67.1

84.2

101.0

135.0

221.0

306.0

391.0

476.0

561.0

732.0

902.0

1073.0

13/32

78.8

98.8

119.0

159.0

259.0

359.0

459.0

559.0

659.0

859.0

1059.0

1259.0

7/16

91.4

115.0

138.0

184.0

300.0

416.0

532.0

648.0

764.0

996.0

1228.0

1460.0

15/32

105.0

131.0

158.0

211.0

344.0

478.0

611.0

744.0

877.0

1144.0

1410.0

1676.0

1/2

119.0

150.0

180.0

241.0

392.0

544.0

695.0

847.0

998.0

1301.0

1604.0

1907.0