Pressure Loss Chart - Class 125 PVC Pipe Irrigation Direct

Table Losses same for all controlled OD
SDR 32.5 thermoplastic pipe.
											PRESSURE LOSS

C = 150									125 psi PR SDR 32.5 PVC PIPE

Pipe Sizes: Nominal Losses per 100 ft: lb/in²
gpm	2 in⁽¹⁾	2-1/2 in⁽¹⁾	3 in	4 in	6 in	gpm	2-1/2 in	3 in	4 in	6 in	8 in	10 in	12 in
5	0.018	0.007	0.003	0.001		160	4.22	1.61	0.471	0.071	0.020	0.007	0.003
10	.064	.025	.010	.003		170	4.72	1.80	.526	.080	.022	.008	.003
15	.135	.053	.020	.006	.001	180	5.24	2.00	.585	.089	.025	.008	.004
20	.230	.090	.034	.010	.002	190		2.22	.647	.098	.027	.009	.004
25	.348	.136	.052	.015	.002	200		2.44	.711	.108	.030	.010	.004
30	.487	.190	.073	.021	.003	210		2.67	.778	.118	.033	.011	.005
35	.648	.253	.097	.028	.004	220		2.91	.848	.129	.036	.012	.005
40	.829	.324	.124	.036	.005	230		3.16	.921	.140	.039	.013	.006
42	.907	.355	.136	.040	.006	240		3.41	0.996	.151	.042	.014	.006
44	0.989	.387	.148	.043	.007	250		3.68	1.07	0.163	0.045	0.015	0.007
46	1.07	.420	.161	.047	.007	260		3.96	1.16	.175	.049	.017	.007
48	1.16	.454	.174	.051	.008	270			1.24	.188	.052	.018	.008
50	1.25	0.490	0.187	0.055	0.008	280			1.33	.201	.056	.019	.008
52	1.35	.527	.202	.059	.009	290			1.41	.215	.059	.020	.009
54	1.44	.565	.216	.063	.010	300			1.51	.229	.063	.022	.009
56	1.55	.604	.231	.067	.010	325			1.75	.265	.073	.025	.011
58	1.65	.645	.247	.072	.011	350			2.00	.304	.084	.029	.013
60	1.76	.687	.263	.077	.012	375			2.28	.346	.096	.033	.014
62	1.87	.730	.279	.081	.012	400			2.56	0.389	0.108	0.037	0.016
64	1.98	.774	.296	.086	.013	425			2.87	.436	.121	.041	.018
66	2.09	.819	.313	.091	.014	450			3.19	.484	.134	.046	.020
68	2.21	.866	.331	.097	.015	475				.535	.148	.051	.022
70	2.33	.913	0.349	0.102	0.015	500				.588	.163	.056	.024
72	2.46	0.962	.368	.107	.016	550				.702	.194	.067	.029
74	2.59	1.01	.387	.113	.017	600				.824	.228	.078	.034
76	2.72	1.06	.407	.119	.018	650				0.956	.265	.091	.040
78	2.85	1.12	.427	.125	.019	700				1.10	.304	.104	.045
80	2.99	1.17	.447	.131	.020	800				1.40	.389	.133	.058
85	3.34	1.31	.500	.146	.022	900				1.75	.483	.166	.072
90	3.72	1.45	.556	.162	.025	1000				2.12	0.587	0.201	0.088
95	4.11	1.61	.615	.179	.027	1100					.701	.240	.105
100	4.52	1.77	0.676	0.197	0.030	1200					.823	.282	.123
105	4.94	1.93	.740	.216	.033	1300					0.954	.327	.143
110	5.39	2.11	.806	.235	.036	1400					1.09	.375	.163
115	5.85	2.29	.875	.255	.039	1500					1.24	.426	.186
120	6.33	2.48	0.947	.276	.042	2000						0.726	.316
125		2.67	1.02	.298	.045	2500						1.10	.478
130		2.87	1.10	.321	.049	3000							0.669
135		3.08	1.18	.344	.052	3500							0.890
140		3.29	1.26	.368	.056	4000
145		3.51	1.34	.392	.060	4500
150		3.74	1.43	0.418	0.063	5000
⁽¹⁾Not ASTM Standard pipe.

POLY VINYL CHLORIDE (PVC) PLASTIC PIPE
Pressure loss tables are provided for both SDR-PR and
Schedule Wall PVC pipe.

Unlike many pipes, the standard wall thickness of PVC
pipe has a plus tolerance only, ranging from 0.020 in to
0.090 in. Many pressure loss tables use the standard
minimum wall (without tolerances) for computation purposes.
Since maufacturing processes preclude
achievement of this thickness, most all PVC pipe will
have a thicker wall and consequently a smaller ID.
Accordingly, use of the standard wall to prepare loss
tables is not realistic. The loss tables here use
a wall thickness which includes one-half of the tolerances.
This results in a more realistic average ID. This
method of determining ID for calculation of pressure
losses is recommended by the Plastic Pipe Institute (PPI).

Caution should be exercised to control velocities in PVC
pipe to avoid damage from pressure surging (water hammer).

Note: PVC pressure loss tables can be used for any
controlled OD thermoplastic pipe of the same SDR or
Schedule number.

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