Ratings | Flexible Braided Hoses
TEMPERATURE and PRESSURE RATINGS
• 8773 (Standard), -50° to 750°F • 8773-H (High temp), -50° to 1000°F • 8773-C (cleaned for oxygen), -50° to 750°F
The hose pressure-temperature ratings are higher than the 8773 hose assembly maximum usable pressure (see table 2). The hose pressure ratings vary with pipe size and are for the hose maximum working pressure in PSIG at 70F. Contact factory for the availability of hoses with hose ends for higher pressure- temperature ratings. The pressure reducing factor table can be used to determine hose maximum pressure rating at elevated temperatures (see table 3).
Common piping practice and industry Piping Standards must be observed when selecting a flexible hose assembly. An 8773 hose assembly has a maximum allowable pressure lower than the actual hose rating. Pressure ratings are limited by the various end connection types used. Table 1 lists maximum allowable pressure- temperature ratings for carbon steel and 304 SST ANSI flanges (see table 1). Note that pressure ratings decrease as temperature rises.
8773 Maximum usuable Pressure- Temperature Rating PSIG. Table 1
Table 2
Table 3
Hose Pressure Rating PSIG
Pressure Reducing Factors for Hose.
NPS
Temp.
Material
Temp.
Material
½ " ¾ "
1310 915 645 545 560 450 570 450 285 240 217 210
°F
SST Steel
°F
SST Steel
-20 to 100 275
285 260 230 200 170 140 125 110
70
1.00
1.00
1"
200 300 400 500 600 650 700 750 800 850 900 950 1000
235 205 180 170 140 125 110 95
150 200 250 300 350 400 450 500
0.97 0.99 0.94 0.97 0.92 0.96 0.88 0.93 0.86 0.91 0.83 0.87 0.81 0.86 0.78 0.81 0.74 0.74 0.70 0.66 0.66 0.52
1 ¼ " 1 ½ '
2"
2 ½ "
3" 4" 6" 8"
95
80 65 50 35 20
- - - - -
600 700 800 900 1000 1100 1200 1300 1400 1500
10"
12" 200
0.62 0.60 0.58 0.55 0.50 0.44 0.40
- - - - - - -
Bulletin 8773 Page 3
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