Burnham SM-6 manual ½ 1.6 ft ¾ 2.1 ft

TABLE I

Maximum Capacity of Piping in Cubic Feet

of Gas Per Hour

(Based on a Pressure Drop of 0.3" Water

and 0.6 Specific Gravity)

Length in	Nominal Iron Pipe Size
Feet	1/2	3/4	1
10	132	278	520
20	92	190	350
30	73	152	285
40	63	130	245
50	56	115	215
60	50	105	195
70	46	96	180
80	43	90	170
90	40	84	160
100	38	79	150

TABLE II

Maximum Capacity of Piping in Cubic Feet of

Gas Per Hour

(Based on a Pressure Drop of 0.5" Water and

0.6 Specific Gravity)

Length in	Nominal Iron Pipe Size
Feet	1/2	3/4	1
10	175	360	680
20	120	250	465
30	97	200	375
40	82	170	320
50	73	151	285
60	66	138	260
70	61	125	240
80	57	118	220
90	53	110	205
100	50	103	195
125	44	93	175
150	40	84	160
175	37	77	145

*NOTE – For all practical purposes, each 90° elbow can be considered as the following equivalent in length of straight pipe:

½” – 1.6 ft.	1” – 2.6 ft.
¾” – 2.1 ft.

TABLE III

Multipliers to be used with Tables I and II for

Specific Gravity Other Than 0.60

Specific Gravity Correction Factors

.501.10

.551.04

.601.00

.65.96

.70.93

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