For operating temperatures of around 500°C and pressures of 120 kilograms, what type of material should be used for the bolts that connect the flanges?

2017-05-17View Original

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This post was last edited by Lantian on 2017-5-20 08:45. The operating temperature is around 500°C, and the pressure is 120 kilograms; what type of bolts should be used to connect the flanges?

Reply #22017-05-18

Check whether it is a plant flange or a pipe flange; for plant flanges, 25Cr2MoVA is used, while for pipe flanges, 35CrMo, 25Cr2MoV, or 42CrMo can all be used. It can be found in both NB/T47020 and HG/T20592.

Reply #32017-05-18

35CrMo is more than sufficient; moreover, when operating at 500°C, the temperature of the external flange connection bolts will not reach that level.

Reply #42017-05-20

Okay, 35CrMo has been selected. Thank you

Reply #52017-05-20

Okay, 35CrMo has been selected. Thank you

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For operating temperatures of around 500°C and pressures of 120 kilograms, what type of material should be used for the bolts that connect the flanges?

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