SDR Pipe Reference

Petersen Does Not Sell Pipe

Select Mechanical or Inflatable Pipe Plugs based on the below pipe ID and along with the pressure to be blocked

"Standard Dimension Ratio" - SDR - The ratio of pipe diameter to wall thickness (SDR = D / s)

D = pipe outside diameter (mm, in) s = pipe wall thickness (mm, in)

SDR 26 (Diameter - D - is 26 times the wall thickness - s )

Thus rated pressure is higher for low SDR ratios and lower for higher SDR ratios

These dimensions are for reference only so please verify and let us know of any errors.

Nominal Pipe Size	Average Outside Diameter	Minimum Wall Thickness (in) And Calculated ID (in)
(in)	(in)	SDR 64		SDR 41		SDR 32.5		SDR 26		SDR 21		SDR 17		SDR 13.5
		Wall	ID	Wall	ID	Wall	ID	Wall	ID	Wall	ID	Wall	ID	Wall	ID
1/8													0.06	0.35
1/4	0.54													0.06	0.46
3/8	0.675													0.06	0.58
1/2	0.84													0.062	0.72
3/4	1.05									0.06	0.95	0.062	0.93	0.078	0.89
1	1.315							0.06	1.21	0.063	1.19	0.077	1.16	0.097
1 1/4	1.66					0.06	1.56	0.064	1.53	0.079	1.5	0.098	1.46	0.123
1 1/2	1.9					0.06	1.78	0.073	1.75	0.09	1.72	0.112	1.68	0.141	1.62
2	2.375					0.073	2.23	0.091	2.19	0.113	2.15	0.14	2.1	0.176	2.02
2 1/2	2.875					0.088	2.7	0.11	2.65	0.137	2.6	0.169	2.54	0.213	2.45
3	3.5			0.085	3.33	0.108	3.28	0.135	3.23	0.167	3.17	0.206	3.09	0.259	2.98
3 1/2	4			0.098	3.8	0.123	3.75	0.154	3.69	0.19	3.62	0.235	3.53	0.296	3.41
4	4.5	0.07	4.36	0.11	4.28	0.138	4.22	0.173	4.15	0.214	4.07	0.265	3.97	0.333	3.83
5	5.563	0.087	5.39	0.136	5.29	0.171	5.22	0.214	5.14	0.265	5.03	0.327	4.91	0.412	4.74
6	6.625	0.104	6.42	0.162	6.3	0.204	6.22	0.255	6.12	0.316	5.99	0.39	5.85	0.491	5.64
8	8.625	0.135	8.36	0.21	8.2	0.265	8.09	0.332	7.96	0.41	7.8	0.508	7.61
10	10.75	0.168	10.41	0.262	10.23	0.331	10.09	0.413	9.92	0.511	9.73	0.632	9.49
12	12.75	0.199	12.35	0.311	12.13	0.392	11.97	0.49	11.77	0.606	11.54	0.75	11.25
14	14		13.56	0.341	13.32	0.43	13.14	0.538	12.92	0.666	12.67	0.823	12.35
16	16		15.5	0.39	15.22	0.492	15.02	0.615	14.77	0.762	14.48	0.941	14.12
18	18		17.44	0.439	17.12	0.554	16.89	0.692	16.62	0.857	16.29	1.059	15.88
20	20		19.38	0.488	19.02	0.615	18.77	0.769	18.46	0.952	18.1	1.176	17.65
24	24		23.25	0.585	22.83	0.738	22.52	0.923	22.15	1.143	21.71	1.412	21.18
30	30		29.06	0.732	28.54	0.923	28.15	1.154	27.69	1.428	27.14	1.765	26.47
36	36		34.88	0.878	34.24	1.108	33.78	1.385	33.23	1.714	32.57	2.118	31.76