Pipe Wall Thickness Tolerances
Manufactured to Industry Standard Pipe Specifications

Pipe Size		Outside Diameter		TYPICAL WALL THICKNESS TOLERANCES (+/-inches)
				SDR 41	SDR 32.5	SDR 26	SDR 21	SDR 17	SCH 40	SCH 80
1/2"		0.840"							+/-0.010"	+/-0.010"
3/4"		1.050"					+/-0.010"	+/-0.010"	+/-0.010"	+/-0.011"
1"		1.315"				+/-0.010"	+/-0.010"	+/-0.010"	+/-0.030"	+/-0.012"
1-1/4"		1.660"			+/-0.010"	+/-0.010"	+/-0.010"	+/-0.010"	+/-0.010"	+/-0.012"
1-1/2"		1.900"			+/-0.010"	+/-0.010"	+/-0.010"	+/-0.010"	+/-0.010"	+/-0.013"
2"		2.375"			+/-0.010"	+/-0.010"	+/-0.010"	+/-0.010"	+/-0.012"	+/-0.017"
2-1/2"		2.875"			+/-0.010"	+/-0.010"	+/-0.010"	+/-0.013"	+/-0.013"	+/-0.018"
3"		3.500"		+/-0.010"	+/-0.010"	+/-0.010"	+/-0.012"	+/-0.014"	+/-0.014"	+/-0.019"
3-1/2"		4.000"		+/-0.010"	+/-0.010"	+/-0.010"	+/-0.013"	+/-0.016"	+/-0.014"	+/-0.020"
4"		4.500"		+/-0.010"	+/-0.011"	+/-0.014"	+/-0.016"	+/-0.020"	+/-0.016"	+/-0.023"
5"		5.563"		+/-0.010"	+/-0.012"	+/-0.016"	+/-0.019"	+/-0.024"	+/-0.017"	+/-0.026"
6"		6.625"		+/-0.013"	+/-0.016"	+/-0.020"	+/-0.025"	+/-0.031"	+/-0.020"	+/-0.030"
8"		8.625"		+/-0.016"	+/-0.020"	+/-0.025"	+/-0.031"	+/-0.038"	+/-0.022"	+/-0.036"
10"		10.750"		+/-0.019"	+/-0.024"	+/-0.030"	+/-0.037"	+/-0.045"	+/-0.025"	+/-0.041"
12"		12.750"		+/-0.024"	+/-0.026"	+/-0.030"	+/-0.040"	+/-0.050"	+/-0.027"	+/-0.045"
EXAMPLE: 6" Sch 40 has a nominal wall of 0.297" +/- 0.020" which means that the wall could run from 0.277" to 0.317"
If tighter tolerances or other unique specifications are required, please contact Available Plastics. Available Plastics is a custom extrusion company and can make almost any size pipe you need. Information deemed reliable but not guaranteed.