How to Guide
46
Plastics Technical Manual
PVC Schedule 40 Pressure Ratings
PVC Schedule 80 Pressure Ratings
Pressure Rating (psi) @ 73°F Pressure Rating (psi) @ 140°F
Socket Threaded Socket Threaded
Size Pipe Fittings Fittings Flanges Unions Pipe Fittings Fittings Flanges Unions
1
⁄2” 600 360 300 150 235 132 79 66 33 52
3
⁄4” 480 288 240 150 235 106 63 53 33 52
1” 450 270 225 150 235 99 59 50 33 52
1
1
⁄4” 370 222 185 150 235 81 49 41 33 52
1
1
⁄2” 330 198 165 150 235 73 44 36 33 52
2” 280 168 140 150 235 62 37 31 33 52
2
1
⁄2” 300 180 150 150 - 66 40 33 33 -
3” 260 156 130 150 235 57 34 29 33 52
4” 220 132 110 150 - 48 29 24 33 -
5” 190 114 95 - - 42 25 21 - -
6” 180 108 90 150 - 40 24 20 33 -
8” 160 96 80 150 - 35 21 18 33 -
10” 140 84 70 150 - 31 18 15 33 -
12” 130 78 65 150 - 29 17 14 33 -
14” 130 78 65 - - 29 17 14 - -
16” 130 78 65 - - 29 17 14 - -
DESIGN & ENGINEERING DATA
Do not exceed the maximum working pressure of any
system components including pipe, fittings, valves, molded
or cut threads, unions, mechanical coupling or flanges.
• The pressure rating of all components must be reduced at
temperatures above 73 degrees F. Refer to de-rating table
in this manual.
• Exceeding the maximum working temperature or
pressure of the system may result in system failure and
property damage.
Pressure Rating (psi) @ 73° F Pressure Rating (psi) @ 140° F
Socket Threaded Unions Socket Threaded Unions
Size Pipe Fittings Fittings Flanges (Socket) Pipe Fittings Fittings Flanges (Socket)
1
⁄2” 850 510 425 150 235 187 112 94 33 52
3
⁄4” 690 414 345 150 235 152 91 76 33 52
1” 630 378 315 150 235 139 83 69 33 52
1
1
⁄4” 520 312 260 150 235 114 69 57 33 52
1
1
⁄2” 470 282 235 150 235 103 62 52 33 52
2” 400 240 200 150 235 88 53 44 33 52
2
1
⁄2” 420 252 210 150 - 92 55 46 33 -
3” 370 222 185 150 235 81 49 41 33 52
4” 320 192 160 150 - 70 42 35 33 -
5” 290 174 145 - - 64 38 32 - -
6” 280 168 140 150 - 62 37 31 33 -
8” 250 150 125 150 - 55 33 28 33 -
10” 230 138 115 150 - 51 30 25 33 -
12” 230 138 115 150 - 51 30 25 33 -
14” 220 132 110 - - 48 29 24 - -
16” 220 132 110 - - 48 29 24 - -