Based on a Pressure drop of 1 psi
Liquid
Propane Flow
GPH
Iron Pipe (Feet)
1/4" 3/8" 1/2" 3/4" 1" 1 ¼" 1 ½" 2"
Schedule Schedule Schedule Schedule Schedule Schedule Schedule Schedule
40 80 40 80 40 80 40 80 40 80 40 80 40 80 40 80
10

15

20

40

60

80

100

120

140

160

180

200

240

280

300

350

400

500

600

700

800

900

1000

1500

2000

3000

4000

5000

10000
729

324

182

46

20

11

7
729

324

182

46

20

11

7




825

205

92

51

33

23

15

13




521

129

58

32

21

15

9

8






745

331

187

119

83

61

47

37

30

21

15

13






504

224

127

81

56

41

32

25

20

14

10

9










735

470

326

240

184

145

118

81

60

52

38

30

19










537

343

238

175

134

106

86

59

44

38

28

22

14

















813

623

491

399

277

204

177

130

99

64

44

32

25

19

16

















618

473

373

303

211

155

135

99

75

49

33

24

19

14

12




























785

578

433

283

197

144

110

87

71

31

18

8




























623

459

344

225

156

114

87

69

56

25

14

6

































980

627

435

320

245

194

157

70

39

17

10
































794

508

352

259

198

157

127

57

32

14

8









































965

764

618

275

154

69

39

25

6








































795

630

509

227

127

57

32

21

5

To Use Chart

  1. Having determined the required flow at point of use, locate this flow in the left hand column. If this falls between two figures, use the larger of the two.
  2. Determine total length of piping required from source of point of use.
  3. Read across chart from left (required Flow) to right to find the total length which is equal to or exceeds the distance from source to use.
  4. From this point, read up to find the correct size of pipe required.