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Pressfit Piping - Friction Loss vs. Water Flow

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The tables below indicates friction loss for water flow through pressfit pipes Schedule 5 Carbon Steel Pipe or Type 304/304L and Type 316/316L Stainless steel pipe.

The pressure drop calculations are made with the D'Arcy-Weisbach Equation.

Fluid : Water
Pipe : Steel Pipe - Schedule 5
Temperature : 20.0 ^oC (68.0 ^oF)
Density : 998.3 kg/m³ (62.0 lb/ft³)
Kinematic Viscosity : 1.004 10^-6 m²/s (0.01 stokes) (1.08E-5 ft²/s)
Pipe Roughness Coefficient : 4.5 10^-5 (m)

Nominal Pipe Size: 1/2"

Inside Diameter: 0.018 m (0.71 inches)

For full table with Pressure Drops - rotate the screen!

Pressfit Piping - Pressure Drop due to Friction Loss vs. Water Flow - 1/2"
Flow			Velocity		Pressure Drop
(m³/s)	(liter/s)	(US gpm)	(m/s)	(ft/s)	(Pa/100m)	(mmH₂O/100m)	(psi/100ft)	(ftH₂O/100ft)
4.0E-5	0.04	0.63	0.157	0.52	3289	335	0.145	0.34
5.0E-5	0.05	0.79	0.196	0.64	4818	491	0.21	0.49
6.0E-5	0.06	0.95	0.24	0.77	6629	676	0.29	0.68
7.0E-5	0.07	1.11	0.28	0.9	8813	899	0.39	0.9
8.0E-5	0.08	1.27	0.31	1.03	10963	1118	0.48	1.12
9.0E-5	0.09	1.43	0.35	1.16	13528	1379	0.6	1.38
1.0E-4	0.1	1.59	0.39	1.29	16701	1703	0.74	1.7
1.1E-4	0.11	1.74	0.43	1.42	19691	2008	0.87	2.0
1.2E-4	0.12	1.9	0.47	1.55	22817	2327	1.01	2.3
1.3E-4	0.13	2.1	0.51	1.68	26778	2731	1.18	2.7
1.4E-4	0.14	2.2	0.55	1.8	30217	3081	1.34	3.1
1.5E-4	0.15	2.4	0.59	1.93	34688	3537	1.53	3.5
1.6E-4	0.16	2.5	0.63	2.1	38370	3913	1.7	3.9
1.7E-4	0.17	2.7	0.67	2.2	43317	4417	1.91	4.4
1.8E-4	0.18	2.9	0.71	2.3	47175	4810	2.1	4.8
1.9E-4	0.19	3.0	0.75	2.4	52562	5360	2.3	5.4
2.0E-4	0.2	3.2	0.79	2.6	58241	5939	2.6	5.9
3.0E-4	0.3	4.8	1.18	3.9	123334	12576	5.5	12.6

.

Nominal Pipe Size: 3/4"

Inside Diameter: 0.023 m (0.92 inches)

Pressfit Piping - Pressure Drop due to Friction Loss vs. Water Flow - 3/4"
Flow			Velocity		Pressure Drop
(m³/s)	(liter/s)	(US gpm)	(m/s)	(ft/s)	(Pa/100m)	(mmH₂O/100m)	(psi/100ft)	(ftH₂O/100ft)
5.0E-5	0.05	0.79	0.12	0.39	1509	154	0.067	0.154
6.0E-5	0.06	0.95	0.144	0.47	2082	212	0.092	0.21
7.0E-5	0.07	1.11	0.168	0.55	2711	276	0.12	0.28
8.0E-5	0.08	1.27	0.193	0.63	3379	345	0.149	0.34
9.0E-5	0.09	1.43	0.22	0.71	4175	426	0.185	0.43
1.0E-4	0.1	1.59	0.24	0.79	5029	513	0.22	0.51
1.1E-4	0.11	1.74	0.26	0.87	5933	605	0.26	0.61
1.2E-4	0.12	1.9	0.29	0.95	6880	702	0.3	0.7
1.3E-4	0.13	2.1	0.31	1.03	8074	823	0.36	0.82
1.4E-4	0.14	2.2	0.34	1.11	9117	930	0.4	0.93
1.5E-4	0.15	2.4	0.36	1.18	10466	1067	0.46	1.07
1.6E-4	0.16	2.5	0.39	1.26	11587	1181	0.51	1.18
1.7E-4	0.17	2.7	0.41	1.34	13080	1334	0.58	1.34
1.8E-4	0.18	2.9	0.43	1.42	14257	1454	0.63	1.46
1.9E-4	0.19	3.0	0.46	1.5	15885	1620	0.7	1.62
2.0E-4	0.2	3.2	0.48	1.58	17601	1795	0.78	1.8
3.0E-4	0.3	4.8	0.72	2.4	36208	3692	1.6	3.7
4.0E-4	0.4	6.3	0.96	3.2	62358	6359	2.8	6.4
5.0E-4	0.5	7.9	1.2	3.9	94292	9615	4.2	9.6
6.0E-4	0.6	9.5	1.44	4.7	131254	13384	5.8	13.4
7.0E-4	0.7	11.1	1.68	5.5	178651	18217	7.9	18.2

Nominal Pipe Size: 1"

Inside Diameter: 0.03 m (1.19 inches)

Pressfit Piping - Pressure Drop due to Friction Loss vs. Water Flow - 1"
Flow			Velocity		Pressure Drop
(m³/s)	(liter/s)	(US gpm)	(m/s)	(ft/s)	(Pa/100m)	(mmH₂O/100m)	(psi/100ft)	(ftH₂O/100ft)
9.0E-5	0.09	1.43	0.127	0.42	1160	118	0.051	0.118
1.0E-4	0.1	1.59	0.141	0.46	1399	143	0.062	0.143
1.1E-4	0.11	1.74	0.156	0.51	1652	168	0.073	0.169
1.2E-4	0.12	1.9	0.17	0.56	1918	196	0.085	0.196
1.3E-4	0.13	2.1	0.184	0.6	2251	230	0.099	0.23
1.4E-4	0.14	2.2	0.198	0.65	2545	260	0.113	0.26
1.5E-4	0.15	2.4	0.21	0.7	2847	290	0.126	0.29
1.6E-4	0.16	2.5	0.23	0.74	3239	330	0.143	0.33
1.7E-4	0.17	2.7	0.24	0.79	3561	363	0.157	0.36
1.8E-4	0.18	2.9	0.25	0.84	3992	407	0.176	0.41
1.9E-4	0.19	3.0	0.27	0.88	4328	441	0.191	0.44
2.0E-4	0.2	3.2	0.28	0.93	4795	489	0.21	0.49
3.0E-4	0.3	4.8	0.42	1.39	9890	1008	0.44	1.01
4.0E-4	0.4	6.3	0.57	1.86	16517	1684	0.73	1.69
5.0E-4	0.5	7.9	0.71	2.3	24975	2547	1.1	2.5
6.0E-4	0.6	9.5	0.85	2.8	34765	3545	1.54	3.5
7.0E-4	0.7	11.1	0.99	3.2	47319	4825	2.1	4.8
8.0E-4	0.8	12.7	1.13	3.7	59674	6085	2.6	6.1
9.0E-4	0.9	14.3	1.27	4.2	75525	7701	3.3	7.7
0.0010	1.0	15.9	1.41	4.6	89910	9168	4.0	9.2
0.0011	1.1	17.4	1.56	5.1	108791	11093	4.8	11.1
0.0012	1.2	19.0	1.7	5.6	129471	13202	5.7	13.2
0.0013	1.3	21	1.84	6.0	151948	15494	6.7	15.5
0.0014	1.4	22	1.98	6.5	169697	17304	7.5	17.3
0.0015	1.5	24	2.1	7.0	194805	19864	8.6	19.9

.

Nominal Pipe Size: 1 1/4"

Inside Diameter: 0.039 m (1.53 inches)

For full table with Pressure Drops - rotate the screen!

Pressfit Piping - Pressure Drop due to Friction Loss vs. Water Flow - 1 1/4"
Flow			Velocity		Pressure Drop
(m³/s)	(liter/s)	(US gpm)	(m/s)	(ft/s)	(Pa/100m)	(mmH₂O/100m)	(psi/100ft)	(ftH₂O/100ft)
1.7E-4	0.17	2.7	0.142	0.47	1011	103	0.045	0.103
1.8E-4	0.18	2.9	0.151	0.49	1133	116	0.05	0.116
1.9E-4	0.19	3.0	0.159	0.52	1230	125	0.054	0.126
2.0E-4	0.2	3.2	0.167	0.55	1363	139	0.06	0.139
3.0E-4	0.3	4.8	0.25	0.82	2744	280	0.121	0.28
4.0E-4	0.4	6.3	0.33	1.1	4592	468	0.2	0.47
5.0E-4	0.5	7.9	0.42	1.37	6951	709	0.31	0.71
6.0E-4	0.6	9.5	0.5	1.65	9686	988	0.43	0.99
7.0E-4	0.7	11.1	0.59	1.92	12744	1300	0.56	1.3
8.0E-4	0.8	12.7	0.67	2.2	16072	1639	0.71	1.64
9.0E-4	0.9	14.3	0.75	2.5	20341	2074	0.9	2.1
0.0010	1.0	15.9	0.84	2.7	24215	2469	1.07	2.5
0.0011	1.1	17.4	0.92	3.0	29301	2988	1.29	3.0
0.0012	1.2	19.0	1.0	3.3	34870	3556	1.54	3.6
0.0013	1.3	21	1.09	3.6	39408	4018	1.74	4.0
0.0014	1.4	22	1.17	3.8	45704	4660	2.0	4.7
0.0015	1.5	24	1.26	4.1	52467	5350	2.3	5.4
0.0016	1.6	25	1.34	4.4	59695	6087	2.6	6.1
0.0017	1.7	27	1.42	4.7	67391	6872	3.0	6.9
0.0018	1.8	29	1.51	4.9	72646	7408	3.2	7.4
0.0019	1.9	30	1.59	5.2	80942	8254	3.6	8.3
0.0020	2.0	32	1.67	5.5	89687	9145	4.0	9.2
0.0030	3.0	48	2.5	8.2	193723	19754	8.6	19.8

Nominal Pipe Size: 1 1/2"

Inside Diameter: 0.045 m (1.77 inches)

For full table with Pressure Drops - rotate the screen!

Pressfit Piping - Pressure Drop due to Friction Loss vs. Water Flow - 1 1/2"
Flow			Velocity		Pressure Drop
(m³/s)	(liter/s)	(US gpm)	(m/s)	(ft/s)	(Pa/100m)	(mmH₂O/100m)	(psi/100ft)	(ftH₂O/100ft)
3.0E-4	0.3	4.8	0.189	0.62	1381	141	0.061	0.141
4.0E-4	0.4	6.3	0.25	0.83	2315	236	0.102	0.24
5.0E-4	0.5	7.9	0.31	1.03	3508	358	0.155	0.36
6.0E-4	0.6	9.5	0.38	1.24	4736	483	0.21	0.48
7.0E-4	0.7	11.1	0.44	1.44	6446	657	0.28	0.66
8.0E-4	0.8	12.7	0.5	1.65	8139	830	0.36	0.83
9.0E-4	0.9	14.3	0.57	1.86	9946	1014	0.44	1.02
0.0010	1.0	15.9	0.63	2.1	12279	1252	0.54	1.25
0.0011	1.1	17.4	0.69	2.3	14326	1461	0.63	1.46
0.0012	1.2	19.0	0.75	2.5	17050	1739	0.75	1.74
0.0013	1.3	21	0.82	2.7	20010	2040	0.88	2.0
0.0014	1.4	22	0.88	2.9	22347	2279	0.99	2.3
0.0015	1.5	24	0.94	3.1	25653	2616	1.13	2.6
0.0016	1.6	25	1.01	3.3	29188	2976	1.29	3.0
0.0017	1.7	27	1.07	3.5	32950	3360	1.46	3.4
0.0018	1.8	29	1.13	3.7	35520	3622	1.57	3.6
0.0019	1.9	30	1.19	3.9	39576	4036	1.75	4.0
0.0020	2.0	32	1.26	4.1	43852	4472	1.94	4.5
0.0030	3.0	48	1.89	6.2	94720	9659	4.2	9.7
0.0040	4.0	63	2.5	8.3	161375	16455	7.1	16.5

.

Nominal Pipe Size: 2"

Inside Diameter: 0.057 m (2.2 inches)

For full table with Pressure Drops - rotate the screen!

Pressfit Piping - Pressure Drop due to Friction Loss vs. Water Flow - 2"
Flow			Velocity		Pressure Drop
(m³/s)	(liter/s)	(US gpm)	(m/s)	(ft/s)	(Pa/100m)	(mmH₂O/100m)	(psi/100ft)	(ftH₂O/100ft)
5.0E-4	0.5	7.9	0.196	0.64	1110	113	0.049	0.113
6.0E-4	0.6	9.5	0.24	0.77	1549	158	0.068	0.158
7.0E-4	0.7	11.1	0.27	0.9	2043	208	0.09	0.21
8.0E-4	0.8	12.7	0.31	1.03	2582	263	0.114	0.26
9.0E-4	0.9	14.3	0.35	1.16	3159	322	0.14	0.32
0.0010	1.0	15.9	0.39	1.29	3766	384	0.166	0.38
0.0011	1.1	17.4	0.43	1.41	4556	465	0.2	0.47
0.0012	1.2	19.0	0.47	1.54	5422	553	0.24	0.55
0.0013	1.3	21	0.51	1.67	6137	626	0.27	0.63
0.0014	1.4	22	0.55	1.8	7117	726	0.31	0.73
0.0015	1.5	24	0.59	1.93	8170	833	0.36	0.83
0.0016	1.6	25	0.63	2.1	8951	913	0.4	0.91
0.0017	1.7	27	0.67	2.2	10105	1030	0.45	1.03
0.0018	1.8	29	0.71	2.3	11329	1155	0.5	1.16
0.0019	1.9	30	0.74	2.4	12623	1287	0.56	1.29
0.0020	2.0	32	0.78	2.6	13449	1371	0.59	1.37
0.0030	3.0	48	1.18	3.9	29049	2962	1.28	3.0
0.0040	4.0	63	1.57	5.1	49491	5047	2.2	5.1
0.0050	5.0	79	1.96	6.4	77329	7885	3.4	7.9
0.0060	6.0	95	2.4	7.7	106513	10861	4.7	10.9
0.0070	7.0	111	2.7	9.0	144976	14783	6.4	14.8
0.0080	8.0	127	3.1	10.3	189356	19309	8.4	19.3

A diagram based the tables above: "Pressfit Pipes - Pressure Loss Diagram".

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