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Cast Iron Pipe Sizes & Dimensions Chart

Petersen Does Not Sell Pipe

Select Mechanical or Inflatable Pipe Plugs based on the below pipe ID in the Cast Iron Pipe Size Chart and along with the pressure to be blocked

Nominal	125 PSI Cast Iron		175 PSI Cast Iron		250 PSI Cast Iron		Pipe Sizing Criteria
Pipe Size	Diameter (ins)		Diameter (ins)		Diameter (ins)		Velocity	Loss in	Flow
(ins)	Outside	Inside	Outside	Inside	Outside	Inside	Ft/sec	PD'/100	GPM
3	3.96	3.06	3.96	3.00			3.1	4.5	100
4	5.00	4.04	5.00	3.96			2.8	5.1	200
6	7.10	6.08	7.10	6.00	7.22	6.00	2.9	6.8	600
8	9.30	8.18	9.30	8.10	9.42	8.00	2.6	7.7	1,200
10	11.40	10.16	11.40	10.04	11.6	10.00	2.7	9	2,200
12	13.50	12.14	13.50	12.00	13.78	12.00	2.5	9.7	3,400
14	15.65	14.17	15.65	14.01	15.98	14.00	1.9	9.4	4,500
16	17.80	16.2	17.8	16.02	18.16	16.00	1.7	9.6	6,000
18	19.92	18.18	19.92	18.00	20.34	18.00	1.9	10.0	8,000
20	22.06	20.22	22.06	20.00	22.54	20.00	1.2	9.2	9,000
24	26.32	24.22	26.32	24.00	26.9	24.00	1.2	10.0	14,000
30	32.40	30.00	32.74	30.00	33.46	30.00	0.9	10.0	22,000
36	38.70	35.98	39.16	36.00	40.04	36.00	0.7	9.5	30,000
42	45.10	42.02	45.58	42.02			0.5	9.3	40,000
48	51.40	47.98	51.98	48.06			0.5	9.8	55,000

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