Design Properties of Pipe

The data in the following tables can be used by piping designers and the engineering community to calculate a variety of factors related to GF Harvel piping such as: working pressures, bending stresses for line expansion, weight loading, axial loads, capacity, support spacing, and other pertinent design related information. The weights shown are higher than minimum weights, as GF Harvel piping products are produced at or near the average wall thickness dimensions per applicable industry standards; not minimum wall thickness dimensions as some other products may be.

Symbols & Units

D = outside diameter of pipe, inches
d = inside diameter of pipe, inches (Average based on mean wall)
t = average wall thickness, inches
Ao = D x pi/12 = outside pipe surface, sq. ft per ft. length
A1 = d x pi/12 = inside surface, sq. ft. per ft. length
A = (D2 - d2) x pi/4 = cross-sectional plastic area, sq.in
Af = d2 x pi/4 = cross sectional flow area, sq.in.
W pvc = .632 x A = weight of pipe, lb. per ft. length
W cpvc = .705 x A = weight of pipe, lb. per ft. length
Ww = 0.433 Af = weight of water filling, lb. Per ft. length
rg = √ I

A
= √ D2 + d2

4
= radius of gyration, inches
I = Arg2 = .0491 (D4-d4) = moment of inertia, inches fourth
Z = 2I/D = 0.0982 x (D4-D4)/D = section modulus, inches cube
Wwfp = Wpvc (or Wcpvc) + Ww = weight of water filled pipe, lb. Per ft. length
Capacity
VG = V x 0.004329 = Volume capacity, gallons per ft. length
V = 0.7854 x d2 x12 = Volume capacity, cubic inches per ft. length
Design Properties Charts
Schedule 40 PVC
Schedule 80 PVC
Schedule 120 PVC
SDR 13.5 PVC
SDR 21 PVC
SDR 26 PVC
SDR 41 PVC
Schedule 40 Clear PVC
Schedule 80 Clear PVC
Schedule 40 CPVC
Schedule 80 CPVC