OMEGAFLEX Home
The OmegaFlex Advantage
Working Pressure Preview
Terminology

Product Specifications
Hose Assemblies
Engineering & Design
Terminology
Motion
Pressure
Flow Velocity
Media
Temperature
Testing
Cleaning
Temperature Correction Factors
Fittings
Installation Precautions
Service Life Factors
ISO 10380 Summary
Hose Application Specifier

Limited Warranty
Disclaimer

Contact OmegaFlex

Engineering & Design > Temperature Correction Factors

As the service temperature increases, the maximum pressure a hose assembly can withstand decreases. The material from which the hose is made and the method of fitting attachment (mechanical, soldered, welded, silver brazed) determine the maximum pressure at which an assembly can be used. By using the factors given in the chart below, the approximate safe working pressure at elevated temperatures can be calculated for assemblies with welded or mechanically attached fittings.

Temperature Correction Factors
Temp (F)
304, 316L
Stainless
321
Stainless
Bronze
Monel
Hastelloy
Inconel
Room
1.00
1.00
1.00
1.00
1.00
1.00
150 .96 .97 .92 .93 .97 .99
200 .92 .94 .89 .90 .94 .98
250 .91 .92 .86 .87 .92 .97
300 .86 .88 .83 .83 .91 .97
350 .85 .86 .81 .82 .89 .96
400 .82 .83 .78 .79 .87 .95
450 .80 .81 .75 .77 .86 .94
500 .77 .78 .73 .85 .94
600 .73 .74 .72 .84 .92
700 .69 .70 .71 .82 .90
800 .64 .66 .70 .81 .89
900 .62 .79 .87
1000 .60 .78 .86
1100 .58 .75 .84
1200 .55 .73 .82
1300 .50 .69 .79
1400 .44 .65 .77
1500 .40 .74

Saturated Steam Pressure To Temperature (PSIG)
Saturated
Steam (PSIG)
Temp (F)
Saturated
Steam (PSIG)
Temp (F)
Saturated
Steam (PSIG)
Temp (F)
0
212
 
150
366
 
450
460
10
238
175
377
475
465
20
259
200
388
500
470
30
274
225
397
550
480
40
287
250
406
600
489
50
298
275
414
700
505
60
307
300
422
800
520
75
320
325
429
900
534
80
324
350
436
1000
546
90
331
375
442
1250
574
100 338
400
448
1500
606
125
353
425
454
2500
669

Saturated Steam Pressure To Temperature (Hg)
Saturated
Steam Vacuum
(in. of Hg)
Temp (F)
0
29.84 20
29.74 32
29.67 40
29.39 60
28.89 80
27.99 100
26.48 120
24.04 140
20.27 160
15.20 180
6.46 200
Example
  Determine if 3/4" annular stainless hose with welded fittings is satisfactory for the given operating conditions?
 
Given:
 

Maximum operating temperature is 700F.
Maximum operating pressure is 200 PSIG.

 

Computation:
 

From the Series 300 specification table — nominal rated burst pressure for 3/4" 312-SP0075 with welded fittings is 3200 PSIG.
From Temperature Correction Factors Chart — factor for stainless at 700F is .70

Rated Burst Pressure: 3200 PSIG x .70 = 2240 PSIG
(rated burst pressure at 700F)
Safe Operating Pressure: 2240 4 = 560 PSIG(using 4:1 safety factor)
 

Result:
  Since the maximum operating pressure for 312-SP0075 at 700F is 560 PSIG the hose will meet the required operating conditions outlined above.
  TOP

OMEGAFLEX, Inc., 451 Creamery Way, Exton, PA 19341-2509
Tel: 1-610-524-7272     Fax: 1-610-524-7282
Call 1-800-355-1039
E-mail: info@omegaflex.net

Request a printed catalog
W-tempcor-0900