Standard Pipe Pressure Classes - American Ductile Iron Pipe

Standard Pressure Classes

American Ductile Iron Pipe
ANSI/AWWA C150/A21.50
and
ANSI/AWWA C151/A21.51
Standard Pressure Classes - Wall Thickness and Nominal Wall Thicknesses

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ADIP Table No. 3-8

Size in.	Outside Diameter in.	Pressure Class
		150	200	250	300	350
		Nominal Thickness in inches
4	4.8	-	-	-	-	0.25
6	6.9	-	-	-	-	0.25
8	9.05	-	-	-	-	0.25
10	11.1	-	-	-	-	0.26
12	13.2	-	-	-	-	0.28
14	15.3	-	-	0.28	0.3	0.31
16	17.4	-	-	0.3	0.32	0.34
18	19.5	-	-	0.31	0.34	0.36
20	21.6	-	-	0.33	0.36	0.38
24	25.8	-	0.33	0.37	0.4	0.43
30	32	0.34	0.38	0.42	0.45	0.49
36	38.3	0.38	0.42	0.47	0.51	0.56
42	44.5	0.41	0.47	0.52	0.57	0.63
48	50.8	0.46	0.52	0.58	0.64	0.7
54	57.56	0.51	0.58	0.65	0.72	0.79
60	61.61	0.54	0.61	0.68	0.76	0.83
64	65.67	0.56	0.64	0.72	0.8	0.87

Notes:
Pressure classes are defined as the rated water working pressure of the pipe in psi. The thicknesses shown are adequate for the rated water working pressure plus a surge allowance of 100 psi. Calculations result in net thicknesses and are based on a minimum yield strength in tension of 42,000 psi and 2.0 safety factor times the sum of working pressure and 100 psi surge allowance.
Thickness can be calculated for rated water working pressure and surges other than the above by use of equation 1 in ANSI/AWWA C150/A21.50.
AMERICAN Ductile Iron pipe is available for water working pressures greater than 350 psi. Check AMERICAN for details.
These are standard pressure classes as given in AWWA C150 and C151. AMERICAN can furnish any thickness in between these standard thicknesses if deemed economical for major projects.
AMERICAN Ductile Iron pipe is also available with thicknesses greater than Pressure Class 350. For special applications, contact AMERICAN.

American Ductile Iron
Fastite® Joint Pipe
ANSI/AWWA C151/A21.51
Weights for Pressure Classes

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ADIP Table No. 3-9

Size in.	Pressure Class	Wall Thickness in.	Weight in Pounds
			Per Foot Plain End	FASTITE JOINT
			Per Foot Plain End	Per Foot Inc. Bell	Per Nominal* Length
4	350	0.25	10.9	11.3	206
6	350	0.25	16	16.7	335
8	350	0.25	21.1	22.1	445
10	350	0.26	27.1	28.4	570
12	350	0.28	34.8	36.4	730
14	250	0.28	40.4	43.2	865
14	300	0.3	43.3	46.1	925
14	350	0.31	44.7	47.6	955
16	250	0.3	49.3	52.5	1050
16	300	0.32	52.5	55.7	1115
16	350	0.34	55.8	59	1180
18	250	0.31	57.2	60.8	1220
18	300	0.34	62.6	66.3	1330
18	350	0.36	66.2	69.8	1400
20	250	0.33	67.5	71.5	1435
20	300	0.36	73.5	77.5	1555
20	350	0.38	77.5	81.5	1635
24	200	0.33	80.8	85.6	1715
24	250	0.37	90.5	95.3	1910
24	300	0.4	97.7	102.5	2055
24	350	0.43	104.9	109.7	2200
30	150	0.34	103.5	111.7	2240
30	200	0.38	115.5	123.7	2480
30	250	0.42	127.5	135.7	2720
30	300	0.45	136.5	144.7	2900
30	350	0.49	148.4	156.6	3140
36	150	0.38	138.5	149.2	2990
36	200	0.42	152.9	163.6	3280
36	250	0.47	170.9	181.6	3640
36	300	0.51	185.3	196	3930
36	350	0.56	203.2	213.9	4285
42	150	0.41	173.8	188.3	3765
42	200	0.47	198.9	213.3	4265
42	250	0.52	219.9	234.3	4685
42	300	0.57	240.7	255.2	5105
42	350	0.63	265.7	280.2	5605
48	150	0.46	222.6	240.3	4805
48	200	0.52	251.3	269	5380
48	250	0.58	280	297.7	5955
48	300	0.64	308.6	326.3	6525
48	350	0.7	337.1	354.8	7095
54	150	0.51	279.7	301.7	6035
54	200	0.58	317.7	339.7	6795
54	250	0.65	355.6	377.5	7550
54	300	0.72	393.4	415.3	8305
54	350	0.79	431.1	453.1	9060
60	150	0.54	317	346.4	6930
60	200	0.61	357.7	387.1	7740
60	250	0.68	398.3	427.7	8555
60	300	0.76	444.6	474	9480
60	350	0.83	485	514.4	10290
64	150	0.56	350.5	386.1	7720
64	200	0.64	400.1	435.7	8715
64	250	0.72	449.6	485.2	9705
64	300	0.8	498.9	534.5	10690
64	350	0.87	542	577.6	11550

Notes:
1. * 4" Fastite pipes are furnished in 18-foot nominal lengths – weights for all other sizes are for 20-foot nominal lengths.
2. Dimensions, lengths and weights, etc., are subject to change at our option.

Also see Standard Dimensions for Fastite Joint Pipe.

60" AMERICAN Fastite® Joint Ductile Iron pipe being installed as a water transmission main.

AMERICAN Ductile Iron Pipe
for Water or Other Liquids
ANSI/AWWA C151/A21.51
Working Pressures and Maximum Depths of Cover
for Minimum Pressure Classes of Ductile Iron Pipe
4" - 64"

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ADIP Table No. 3-10

Size in.	Pressure Class	Thickness in.	Working Pressure (1) psi	Laying Conditions Maximum Depth of Cover in Feet(2)
Size in.	Pressure Class	Thickness in.	Working Pressure (1) psi	Type 1	Type 2	Type 3	Type 4	Type 5
4	350	0.25	350	53	61	69	85	100(3)
6	350	0.25	350	26	31	37	47	65
8	350	0.25	350	16	20	25	34	50
10	350	0.26	350	11**	15	19	28	45
12	350	0.28	350	10**	15	19	28	44
14	250	0.28	250	*	11**	15	23	36
16	250	0.3	250	*	11**	15	24	34
18	250	0.31	250	*	10**	14	22	31
20	250	0.33	250	*	10	14	22	30
24	200	0.33	200	*	8**	12	17	25
30	150	0.34	150	*	-	9	14	22
36	150	0.38	150	*	-	9	14	21
42	150	0.41	150	*	-	9	13	20
48	150	0.46	150	*	-	9	13	20
54	150	0.51	150	*	-	9	13	20
60	150	0.54	150	*	5**	9	13	20
64	150	0.56	150	*	5**	9	13	20

Notes:

These pipes are adequate for the rated working pressure plus a surge allowance of 100 psi. Ductile iron pipe for working pressures higher than 350 psi is available. Figures include 2.0 safety factor times the sum of working pressure and 100 psi surge allowance.
An allowance for single H-20 truck with 1.5 impact factor is included for all sizes and all depths of cover.
Calculated maximum depth of cover exceeds 100'.

* Laying condition Type 1 is limited to 12" and smaller pipe. For 14" and larger pipe, laying condition Type 1 should not be used.
** Minimum allowable depth of cover is 3'.

AMERICAN Ductile Iron Pipe
for Water or Other Liquids
ANSI/AWWA C151/A21.51
Working Pressures and Maximum Depths of Cover
for Pressure Classes

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ADIP Table No. 3-11

Size in.	Pressure (1) Class psi	Nominal Thickness in.	Laying Conditions Maximum Depth of Cover in Feet (2)
Size in.	Pressure (1) Class psi	Nominal Thickness in.	Type 1	Type 2	Type 3	Type 4	Type 5
4	350	0.25	53	61	69	85	100 (3)
6	350	0.25	23	31	37	47	65
8	350	0.25	16	20	25	34	50
10	350	0.26	11**	15	19	28	45
12	350	0.28	10**	15	19	28	44
14	250	0.28	++	11**	15	23	36
14	300	0.3	++	13	17	26	42
14	350	0.31	++	14	19	27	44
16	250	0.31	++	11**	15	24	34
16	300	0.32	++	13	17	26	39
16	350	0.34	++	15	20	28	44
18	250	0.31	++	10**	14	22	31
18	300	0.34	++	13	17	26	36
18	350	0.36	++	15	19	28	41
20	250	0.33	++	10	14	22	30
20	300	0.36	++	13	17	26	35
20	350	0.38	++	15	19	28	38
24	200	0.33	++	8**	12	17	25
24	250	0.37	++	11	15	20	29
24	300	0.4	++	13	17	24	32
24	350	0.43	++	15	19	28	37
30	150	0.34	++	-	9	14	22
30	200	0.38	++	8***	12	16	24
30	250	0.42	++	11	15	19	27
30	300	0.45	++	12	16	21	29
30	350	0.49	++	15	19	25	33
36	150	0.38	++	-	9	14	21
36	200	0.42	++	8***	12	15	23
36	250	0.47	++	10	14	18	25
36	300	0.51	++	12	16	20	28
36	350	0.56	++	15	19	24	32
42	150	0.41	++	-	9	13	20
42	200	0.47	++	8	12	15	22
42	250	0.52	++	10	14	17	25
42	300	0.57	++	12	16	20	27
42	350	0.63	++	15	19	23	32
48	150	0.46	++	-	9	13	20
48	200	0.52	++	8	11	15	22
48	250	0.58	++	10	13	17	24
48	300	0.64	++	12	15	19	27
48	350	0.7	++	15	18	22	30
54	150	0.51	++	-	9	13	20
54	200	0.58	++	8	11	14	22
54	250	0.65	++	10	13	16	24
54	300	0.72	++	13	15	19	27
54	350	0.79	++	15	18	22	30
60	150	0.54	++	5**	9	13	20
60	200	0.61	++	8	11	14	22
60	250	0.68	++	10	13	16	24
60	300	0.76	++	13	15	19	26
60	350	0.83	++	15	18	22	30
64	150	0.23	++	2**	9	13	20
64	200	0.64	++	8	11	14	21
64	250	0.72	++	10	13	16	24
64	300	0.8	++	12	15	19	26
64	350	0.87	++	15	17	21	29

Notes:

These pipes are adequate for the rated working pressure indicated for each nominal size plus a surge allowance of 100 psi. Calculations are based on a 2.0 safety factor times the sum of working pressure and 100 psi surge allowance. Ductile iron pipe for working pressures higher than 350 psi is available.
An allowance for a single H-20 truck with 1.5 impact factor is included for all sizes and all depths of cover.
Calculated maximum depth of cover exceeds 100'.

++ Laying condition Type 1 is limited to 12" and smaller pipe. For 14" and larger pipe, laying condition Type 1 should not be used.
** Minimum allowable depth of cover is 3'.

AMERICAN Ductile Iron Fastite Joint Gravity Sewer Pipe
ASTM A746 PIPE WITH FLEXIBLE LININGS

Depths of Cover for Standard Pressure Classes

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ADIP Table No. 3-14

Size in.	Pressure Class psi	Thickness in.	Laying Conditions Maximum Depth of Cover in Feet
Size in.	Pressure Class psi	Thickness in.	Type 1	Type 2	Type 3	Type 4	Type 5
4	350	.25	53	61	69	85	109
6	350	.25	26	31	37	47	65
8	350	.25	16	20	25	34	50
10	350	.26	11**	15	19	28	45
12	350	.28	10**	15	19	28	44
14	250	.28	-	11**	15	23	41
14	300	.30	-	13	17	26	43
14	350	.31	-	14	19	27	44
16	250	.30	-	11**	15	24	41
16	300	.32	-	13	17	26	43
16	350	.34	-	15	20	28	45
18	250	.31	-	10**	14	23	40
18	300	.34	-	13	17	26	43
18	350	.36	-	15	19	28	45
20	250	.33	-	10*	14	23	40
20	300	.36	-	13	17	26	43
20	350	.38	-	15	19	28	44
24	200	.33	-	8**	12	20	37
24	250	.37	-	11	15	23	41
24	300	.40	-	13	17	26	43
24	350	.43	-	15	19	28	45
30	150	.34	-	-	9**	17	33
30	200	.38	-	8**	12	20	37
30	250	.42	-	11	15	23	40
30	300	.45	-	12	16	25	42
30	350	.49	-	15	19	28	44
36	150	.38	-	-	9	17	33
36	200	.42	-	8**	12	20	37
36	250	.47	-	10	14	23	40
36	300	.51	-	12	17	25	42
36	350	.56	-	15	19	28	45
42	150	.41	-	-	9	16	32
42	200	.47	-	8	12	20	37
42	250	.52	-	10	14	23	40
42	300	.57	-	12	17	25	42
42	350	.63	-	15	19	28	45
48	150	.46	-	-	9	17	33
48	200	.52	-	8	12	20	37
48	250	.58	-	10	14	23	40
48	300	.64	-	12	17	25	42
48	350	.70	-	15	19	28	44
54	150	.51	-	-	9	17	33
54	200	.58	-	8	12	20	37
54	250	.65	-	10	14	23	40
54	300	.72	-	13	17	25	43
54	350	.79	-	15	19	28	45
60	150	.54	-	5**	9	17	33
60	200	.61	-	8	12	20	37
60	250	.68	-	10	14	23	40
60	300	.76	-	13	17	25	43
60	350	.83	-	15	19	28	45
64	150	.56	-	5**	9	17	33
64	200	.64	-	8	12	20	36
64	250	.72	-	10	15	23	40
64	300	.80	-	13	17	25	43
64	350	.87	-	15	19	28	45

Notes:
** Minimum allowable depth of cover is 3'.
The bolded numbers denote the depths of cover resulting from the pipe thickness being governed by deflection in the design; these covers are greater due to the design deflection of 5% for flexible-lined pipe instead of 3% for cement-lined pipe.

> Standard Pressure Classes-Wall Thickness
> Weights for Pressure Classes
> Working Pressures & Depths of Cover Min. Pressure Classes
> Working Pressures & Depths of Cover Pressure Classes
> Gravity Service Pipe Depths of Cover