Calculate subsea pipeline temperature derating stress from temperature (DNVGL-ST-F101 section 5.3.3 Figure 5-2).
The derating stress is valid for temperatures up to 200 degrees C. For temperatures above 200 C material tests should be performed. For low temperature pipelines fracture toughness should also be considered.
Use the Result Table option to display a table of derated yield stress versus material type at the design temperature. Use the Result Plot option to display a plot of derated yield stress versus temperature for duplex stainless 22Cr 25Cr, and carbon manganese steel 13Cr curves.
Tool Input
- syutype : Stress Table Type
- mattype : Material Strength Type
- SMYSu : User Defined Specified Minimum Yield Stress
- SMTSu : User Defined Specified Minimum Tensile Stress
- syttype : Temperature Derating Type
- fytu : User Defined Yield Stress Temperature Derating
- futu : User Defined Ultimate Stress Temperature Derating
- autype : Material Strength Factor Type
- Td : Design Temperature
Tool Output
- αu : Material Strength Factor
- SMTS : Specified Minimum Tensile Stress
- SMYS : Specified Minimum Yield Stress
- fcb : Burst Stress
- fu : Tensile Stress
- fut : Temperature Derating Tensile Stress
- fy : Yield Stress
- fyt : Temperature Derating Yield Stress