Temperature Correction
Temperature Adjustment Factors
The working pressure and bending radius stated in the technical data tables for Flexmetallic hoses can only be used as a guideline. The data is valid for predominantly static working pressures and stress and at room temperature (68°F/20°C).
When designing metal hose assemblies the pressure rating of the assembly is directly affected by the temperature the hose will be subjected too. If the design pressure is working at a temperature above 20c then the following temperature correction factors should be applied to work out the true pressure rating the hose is able to withstand.
When hoses are needed to work at higher temperatures, the working pressure given should be multiplied by the correction factor. This provides the pressure rating of hoses for higher temperatures.
Example:
- Design Pressure of 50 NB hose is required at temperature of 200°C using hose material SS316L
- Specified pressure for 50 NB single wire braid hose, as per the table (Series T7011), is 30 bar.
- The correction factor at 200°C is 0.62
- Thus, the permissible working pressure is 30 x 0.62=18.6 bar.
Recommended design pressure of SS316L DN50 Hose with single wire braiding at 200 degree Celsius will be 18.6 bar
| Temparature °C | 20 | 50 | 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 550 | 600 | 650 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Material | ||||||||||||||
| 1.4306-304L | 1 | 0.87 | 0.72 | 0.65 | 0.59 | 0.55 | 0.51 | 0.48 | 0.46 | 0.45 | 0.44 | 0.43 | / | / |
| 1.4301-304 | 1 | 0.88 | 0.73 | 0.66 | 0.60 | 0.56 | 0.52 | 0.50 | 0.48 | 0.47 | 0.46 | 0.42 | / | / |
| 1.4541-321 | 1 | 0.92 | 0.83 | 0.78 | 0.74 | 0.71 | 0.67 | 0.64 | 0.62 | 0.61 | 0.60 | 0.59 | / | / |
| 1.4404-316L | 1 | 0.88 | 0.74 | 0.67 | 0.62 | 0.58 | 0.54 | 0.52 | 0.50 | 0.48 | 0.47 | 0.47 | / | / |
| 1.4401-316 | 1 | 0.90 | 0.78 | 0.71 | 0.66 | 0.62 | 0.58 | 0.56 | 0.53 | 0.52 | 0.51 | 0.51 | / | / |
| 2.4856-Inconel | 1 | 0.95 | 0.88 | 0.84 | 0.80 | 0.78 | 0.75 | 0.73 | 0.70 | 0.68 | 0.65 | 0.64 | 0.63 | 0.50 |
Notes
NOTE 1
The derating factor to be applied to low temperatures for some of the austenitic materials listed is higher than 1. For further information, contact the manufacturer.
NOTE 2
Stainless steel designations and values are specified in EN 10028-7 for 1% proof strength (C product form); carbon steel designations and values are specified in EN 10028-2 and nickel alloy designations are specified in EN 10095.