Gas Flow Information

Flow of gas in pipes of a density of .6 (nat Gas)
With a pressure drop of 1.0 mbar

  Length of straigh run in Mtrs. for screwed medium steel tube BS1387
Nominal Size ID 6 12 20 30 50
15mm ... 1/2" (m3/hr)
2.9
(m3/hr)
2.0
(m3/hr)
1.4
(m3/hr)
1.2
(m3/hr)
1.0
20mm ... 3/4" 6.6 4.5 3.3 2.6 2.0
25mm ... 1" 12 8.4 6.3 5.1 3.7
32mm ... 1 1/4" 26 18 14 11 8.1
40mm ... 11/2" 41 27 21 16 12
50mm ... 2" 77 52 40 31 23
65 mm ... 2 1/2" 150 100 79 62 47
80mm ... 3" 230 160 120 97 73
100mm ... 4" 475 331 250 200 150

 

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