Pipe Sizing Tables

The following table is expressed as imperial values. To view this page in SI metric units, click here.Steam Pipe Capacity at 30 psig - Schedule 40 Pipe

Pipe Size

Pressure drop per 100 ft of pipe length   
(IN)
1/8
1/4
1/2
3/4
1
2
1/2
3/4
1
1 1/4
1 1/2
2   
2 1/2
3
3 1/2
4
5
6
8
10
12
7
16
32
70
110
223
368
675
990
1,420
2,625
4,315
9,000
16,400
26,350
10
22
45
99
156
316
520
953
1,405
2,020
3,720
6,100
12,700
23,200
37,250
14
32
64
142
220
446
735
1,340
2,010
2,850
5,260
8,650
18,000
33,300
52,500
17
39
79
174
270
546 
900
1,652
2,470
3,490
6,450
10,600
22,000
40,250
64,500
19
45
91
202
312
630
1,040
1,905
2,850
4,025
7,450
12,200
25,420
46,500
74,500
28
64
129
283
440
892
1,472
2,690
4,020
5,700
10,550
17,300
36,000
65,750
105,500


Click on the red dots for more information.
      Above      
Velocities Less Than
Violet
Yellow
Blue
Red
Green
6,000 fpm
8,000 fpm
10,000 fpm
12,000 fpm
15,000 fpm








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