API 598 Test Table
Cast Steel
SHELL TIME
2" & Smaller   -   15 SECONDS
2 1/2" - 6"   -   1 MINUTE
8" - 12"   -   2 MINUTES
14" & LARGER   -   5 MINUTES
SEAT TIME LOW OR HIGH
2" & Smaller   -   15 SECONDS
2 1/2" - 6"   -   1 MINUTE
8" - 12"   -   2 MINUTES
14" & LARGER   -   5 MINUTES
BACKSEAT TIME
2" - 6"   -   1 MINUTE
8" - 12"   -   1 MINUTE
14" - LARGE   -   2 MINUTES
CLASS 100 F SHELL HYDRO BACKSEAT LOW CLOSURE HIGH CLOSURE
(125#) 200 WOG 300 PSI 220 WATER OR 80 AIR 80 AIR 220 WATER
(150#) 285 WOG 450 PSI 314 WATER OR 80 AIR 80 AIR 314 WATER
(300#) 740 WOG 1125 PSI 814 WATER OR 80 AIR 80 AIR 814 WATER
(600#) 1480 WOG 2250 PSI 1628 WATER OR 80 AIR 80 AIR 1628 WATER
(800#) 1975 WOG 2975 PSI 2173 WATER OR 80 AIR 80 AIR 2173 WATER
(900#) 2220 WOG 3350 PSI 2442 WATER OR 80 AIR 80 AIR 2442 WATER
(1500#) 3705 WOG 5575 PSI 4076 WATER OR 80 AIR 80 AIR 4076 WATER
(2500#) 2220 WOG 6170 PSI 6787 WATER OR 80 AIR 80 AIR 6787 WATER

Notes: WOG x 1.5 = SHELL & WOG x 110% = HIGH CLOSURE & BACKSEAT

ALLOWABLE LEAKAGE
VALVE
 
2"
2 1/2" - 6"
8" - 12"
14" - LARGER
LIQUID TEST DROPS PER MINUTE
0
12
20
28
GAS TEST BUBBLES PER MINUTE
0
72
120
168
* INFORMATION SOURCE: API STANDARD 598 SIXTH EDITION, SEPT 1990 .
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