API Pressure Relief Valve Destinations Table API Pressure Relief Valve Destinations Table
API Pressure Relief Valve Destinations Table
Standard Orifice
Designation
Orifice Area
cm2
Orifice Area
in2
D 0.710 0.110 Yes Yes Yes
E 1.265 0.196 Yes Yes Yes
F 1.981 0.307 Yes Yes Yes
G 3.245 0.503 Yes Yes
H 5.065 0.785 Yes Yes
J 8.303 1.287 Yes Yes
K 11.858 1.838 Yes Yes
L 18.406 2.853 Yes Yes
M 23.226 3.60 Yes
N 28.000 4.34 Yes
P 41.161 6.38 Yes
Q 71.290 11.05 Yes
R 103.226 16.0 Yes Yes
T 167.742 26.0 Yes
inch 1 x 2 1.5 x 2 1.5 x 3 2 x 3 3 x 4 3 x 6 4 x 6 6 x 8 6 x 10 8 x 10
mm 25 x 50 38 x 50 38 x 75 50 x 75 75 x 100 75 x 150 100 x 150 150 x 200 150 x 250 200 x 250
Valve Body Size (Inlet Diameter x Outlet Diameter)

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