SAE J514 Pressure Ratings
NOM. SAE
DASH SIZE
NOM. TUBE
O.D. INCHES
37° FLARE
STRAIGHT THREAD
NOM. PIPE
SIZE
SAE ST. THREADS
UNION & BULKHEAD
(PSI)
FITTINGS WITH
PIPE THREADS
(PSI)
2
1/8
5/16″-24
1/8″
5000
5000
3
3/16
3/8″-24
1/8″
5000
5000
4
1/4
7/16″-20
1/8″
5000
5000
5
5/16
1/2″-20
1/8″
5000
5000
6
3/8
9/16″-18
1/4″
5000
5000
8
1/2
3/4″-16
3/8″
4500
4000
10
5/8
7/8″-14
1/2″
3500
3000
12
3/4
1 1/16″-12
3/4″
3500
3000
14
7/8
1 3/16″-12
3/4″
3000
2500
16
1
1 5/16″-12
1″
3000
2000
20
1 1/4
1 5/8″-12
1 1/4″
2500
1150
24
1 1/2
1 7/8″-12
1 1/2″
2000
1000
32
2
2 1/2″-12
2″
1500
1000
NOTE
Since many factors influence the pressure at which a system will or will not perform satisfactory, values shown in this table should not be construed as guaranteed minimum.