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Pressure-Temperature Ratings for Incoloy 825 Flanges

Incoloy 825 flanges manufactured to ASME B16.5 can only be made from annealed material and its maximum applicable temperature is 538°C [1000°F]. It can be furnished in a variety of types including welding neck, slip on, blind, threaded, lap joint, long weld neck, and socket welding. The flange can be either made from ASTM B564 UNS N08825 forging or ASTM B424 Gr. N08825 plate(only for blind and plate flange) with nominal composition of 42Ni-21.5Cr-3Mo-2.3Cu.

ASME B16.5 welding neck flange, RTJ end, 3" SCH80 600#. Material: Incoloy 825

ASME B16.5 welding neck flange, RTJ end, 3″ SCH80 600#. Material: Incoloy 825

Pressure-Temperature Ratings for Incoloy 825: Metric Unit

Temp. °CClass 150Class 300Class 400Class 600Class 900Class 1500Class 2500
-29~3820.051.768.9103.4155.1258.6430.9
5019.551.768.9103.4155.1258.6430.9
10017.751.568.7103.0154.6257.6429.4
15015.850.366.8100.3150.6250.8418.2
20013.848.364.596.7145.0241.7402.8
25012.146.361.792.7139.0231.8386.2
30010.242.957.085.7128.6214.4357.1
3259.341.455.082.6124.0206.6344.3
3508.440.353.680.4120.7201.1335.3
3757.438.951.677.6116.5194.1323.2
4006.536.548.973.3109.8183.1304.9
4255.535.246.570.0105.1175.1291.6
4504.633.745.167.7101.4169.0281.8
4753.731.742.363.495.1158.2263.9
5002.828.237.656.584.7140.9235.0
5381.425.233.450.075.2125.5208.9
*The table lists working pressures by classes at different temperatures, in bar unit.

Pressure-Temperature Ratings for Incoloy 825: US Customary Unit

Temp. °FClass 150Class 300Class 400Class 600Class 900Class 1500Class 2500
-20~10029075010001500225037506250
20026075010001500225037506250
3002307309701455218536406070
4002007009301395209534905820
5001706658851330199533255540
6001406058051210181530255040
6501255907851175176529404905
7001105707551135170528404730
750955307101065159526604430
800805106751015152525404230
85065485650975146024354060
90050450600900135022453745
95035385515775116019303220
100020365485725109018203030
*The table lists working pressures by classes at different temperatures, in psig unit.

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