I would help you only understanding the question.
And the question is......?

As reference, I extracted the following from docs.

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ASME B31.8-2007

Chapter VIII Offshore Gas Transmission
A842 STRENGTH CONSIDERATIONS
A842.2 Strength Considerations During Operations
A842.22 Design Against Yielding
A842.221 Hoop Stress

[page 97]
Sh ≤ F1ST
S = specified minimum yield strength, psi
Sh = hoop stress, psi
T = temperature derating factor from Table 841.116A
F1 = hoop stress design factor from Table A842.22


[page 33]
Table 841.116A Temperature Derating Factor, T, for Steel Pipe
Temperature, °F.........Temperature Derating Factor, T
250 or less............1.000
300.....................0.967
350.....................0.933
400.....................0.900
450.....................0.867

[page 98]
Table A842.22 Design Factors for Offshore
Pipelines, Platform Piping, and Pipeline Risers
........................F1...
........................Hoop Stress...
Location
Pipeline.................0.72...
Platform piping.......0.50...
and risers


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ASME B31.8-2010
Chapter VIII
Offshore Gas Transmission
A842 STRENGTH CONSIDERATIONS
A842.2 Strength Considerations During Operations
A842.2.2 Design Against Yielding.
(a) Hoop Stress


[page 104]
Sh ≤ F1ST
F1 = hoop stress design factor from Table A842.2.2-1
S = specified minimum yield strength, psi (MPa)
Sh = hoop stress, psi (MPa)
T = temperature derating factor from Table 841.1.8-1

[page 104]
Table A842.2.2-1 Design Factors for Offshore
Pipelines, Platform Piping, and Pipeline Risers
........................F1...
........................Hoop Stress...
Location
Pipeline.................0.72...
Platform piping.......0.50...
and risers


[page 40]
Table 841.1.8-1 Temperature Derating Factor, T, for Steel Pipe
................................Temperature Derating
Temperature, °F (°C)............Factor, T
250 (121) or less..............1.000
300 (149).......................0.967
350 (177).......................0.933
400 (204).......................0.900
450 (232).......................0.867



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Quick Reference Guide

B31.8 Chapter VIII

Hoop Stress: Sh ≤ F1 S T (OPE, SUS, OCC)
[...]

Where:
S = Specified Minimum Yield Strength
F1= Hoop Stress Design Factor (0.50 or 0.72, see Table A842.22 of the B31.8 Code)
T= Temperature Derating Factor (see Table 841.116A of the B31.8 Code)

Note: The product of S and T (i.e. the yield stress at operating temperature) is required in SH of the CAESAR II Input.