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Steel Pipes - De-Rating vs. Temperature

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Temperature derating factors of steel pipes due to stress are indicated below:

Steel Pipes - De-Rating Factor vs. Temperature
TemperatureDerating Factor
(oF)(oC)
< 250 < 121 1.00
250 - 300 121 - 149 0.97
300 - 350 149 - 177 0.93
350 - 400 177 - 204 0.90
400 - 450 204 - 233 0.87
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Related Topics

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ANSI B16.5 - Steel Pipe Flanges - Pressure and Temperature Ratings - Group 1.2.

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Carbon and Stainless Steel Flanges - ASME/ANSI Class 150

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Increased temperatures derates the strength of thermoplastic piping materials.

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