Multiplying Factors - Flow Velocities Chart


Nominal Size	Controlled (IPS) OD Thermoplastic Pipe									Nominal Size
	SDR 32.5	SDR 26	SDR 21	SDR 17	SDR 13.5	SDR 11	Schd. 40	Schd. 80	Schd. 120
	To determine ft/s Velocity, multiply gpm Flow by following factors:
1/8 in					5.82		6.59	10.7		1/8 in
1/4 in					2.55		3.45	5.14		1/4 in
3/8 in					1.43		1.83	2.52		3/8 in
1/2 in				0.843	0.843	0.915	1.13	1.48	1.77	1/2 in
3/4 in			0.493	.498	.535	.580	0.632	0.784	0.858	3/4 in
1 in		0.296	.299	.314	.337	.370	.386	.466	.515	1 in
1-1/4 in		.179	.186	.196	.210	.230	.221	.259	.282	1-1/4 in
1-1/2 in		.136	.141	.149	.160	.175	.162	.188	.202	1-1/2 in
2 in	0.0837⁽¹⁾	.0865	.0901	.0949	.102	.111	.0975	.112	.120	2 in
2-1/2 in	.0569⁽¹⁾	.0588	.0613	.0645	.0696		.0683	.0779	.0815	2-1/2 in
3 in	0.0383	0.0396	0.0413	0.0435	0.0469	0.0512	0.0441	0.0498	0.0537	3 in
3-1/2 in	.0293	.0303	.0316	.0333	.0359		.0330	.0369	.0385	3-1/2 in
4 in	.0231	.0239	.0250	.0263	.0284	.0310	.0256	.0285	.0320	4 in
5 in	.0151	.0157	.0163	.0172	.0186		.0162	.0180	.0201	5 in
6 in	.0107	.0110	.0115	.0122	0.0131	0.0143	.0112	.0125	.0138	6 in
8 in	.006 28	.006 51	.006 79	.007 17			.006 48	.007 14	.008 10	8 in
10 in	.004 05	.004 19	.004 37	.004 61			.004 10	.004 53	.005 08	10 in
12 in	0.002 88	0.002 98	0.003 11	0.003 28			0.002 89	0.003 20	0.003 62	12 in
⁽¹⁾ Not ASTM Standard pipe.
Nominal Size	Controlled OD (Copper Tube Size OD) Thermoplastic Tubing		PE Controlled (IPS) ID Thermoplastic Pipe	Copper Water Tube			Galv. Steel Pipe		Water Hose (Smooth-Bore)	Nominal Size


	PVC SDR 26⁽²⁾	PE SDR 9⁽²⁾		Type M	Type L	Type K
	PVC SDR 26⁽²⁾	PE SDR 9⁽²⁾		Type M	Type L	Type K	Schd. 40	Schd. 80
	To determine ft/s Velocity, multiply gpm Flow by following factors:
1/8 in							5.65	8.84		1/8 in
1/4 in					4.12	4.39	3.08	4.48		1/4 in
3/8 in				2.02	2.21	2.53	1.68	2.28		3/8 in
1/2 in	1.73	1.80	1.06	1.26	1.38	1.47	1.06	1.37	1.63	1/2 in
5/8 in		1.24			0.921	0.961			1.05	5/8 in
3/4 in	0.754	0.906	0.602	0.621	.663	.736	0.602	0.742	0.726	3/4 in
1 in	.420	.548	.371	.367	.389	.413	.371	.446	.409	1 in
1-1/4 in	0.267	.368	.215	.245	.255	.264	.215	.250	.261	1-1/4 in
1-1/2 in		.264	.158	.175	.180	.186	.158	.182	.182	1-1/2 in
2 in		0.154	.956	.101	.104	.106	.0956	.109	.102	2 in
2-1/2 in			.670	.0656	.0672	.0689	.0670	.0757	.0654	2-1/2 in
3 in			0.434	0.0460	0.0471	0.0483	0.0434	0.0486	0.0454	3 in
3-1/2 in				.0341	.0348	.0357	.0325	.0361		3-1/2 in
4 in			.0252	.0264	.0268	.0275	.0252	.0279	.0255	4 in
5 in				.0170	.0172	.0177	.0160	.0176	.0163	5 in
6 in			0.0111	.0118	.0120	.0124	.0111	.0123	.0113	6 in
8 in				.006 74	.006 85	.007 10	.006 41	.007 03	0.006 38	8 in
10 in				.004 34	.004 11	.004 58	.004 07	.004 41		10 in
12 in				0.003 03	0.003 05	0.003 19	0.002 87	0.003 16		12 in
⁽²⁾ CAUTION: Not same as Thermoplastic pipe of same SDR.

CAST IRON PIPE⁽³⁾						ASBESTOS-CEMENT PIPE⁽³⁾
Nominal Size	To determine ft/s Velocity, multiply gpm Flow by following factors:					Nominal Size	To determine ft/s Velocity, multiply gpm Flow by following factors:


2 in	0.102					3 in	0.0454
2-1/4 in	0.0807					4 in	0.0255
3 in	0.0454					6 in	0.0119
4 in	0.0255					8 in	0.006 63
6 in	0.0114					10 in	0.004 21
8 in	0.006 38					12 in	0.002 98
10 in	0.004 09
12 in	0.002 84
		⁽³⁾ Factors are same for all classes of pipe of the same nominal size.
		See explanation of pressure loss in pipe for detailed information.

Product Costs	$0.00
Est. Shipping	Add Zip Code
Sub-Total	$0.00

RECENTLY ADDED TO CART

Sub-total

Multiplying Factors - Flow Velocities Chart

Free shipping and discounted pricing may be available in your area!