255.191 - Design pressure of plastic fittings

 

 

(a) The design pressure of polyvinyl chloride (PVC) Schedules-40 and 80 thermoplastic fittings must be obtained from the following table:

 

PVC Type II
Class Location
Size inches		 Schedule 1 2 & 3 4 1 2 & 3 4
½ 40 100 100 100 100 100 100
  80 100 100 100 100 100 100
¾ 40 100 100 96 100 100 100
  80 100 100 100 100 100 100
1 40 100 100 90 90 100 100
  80 100 100 100 100 100 100
  80 100 100 100 100 100 100
1¼ 40 100 92 74 100 100 100
  80 100 100 100 100 100 100
1½ 40 100 83 86 100 100 100
  80 100 100 94 100 100 100
2 40 89 69 55 100 100 100
  80 100 100 81 100 100 100
2½ 40 99 76 61 100 100 100
  80 100 100 85 100 100 100
3 40 84 66 53 100 100 100
  80 100 94 75 100 100 100
3½ 40 77 60 48 100 100 96
  80 100 86 69 100 100 100
4 40 71 56 44 100 100 89
  80 100 81 65 100 100 100
5 40 82 49 39 100 97 78
  80 93 72 58 100 100 100
6 40 56 44 35 100 88 71
  80 89 70 56 100 100 100

Note:

These pressure ratings are the same value as the design pressure of the corresponding pipe size and schedule in the same class location, as determined by the formula given in section 255.121 of this Part.