The design temperature is 750°C and the pressure is 0.2 Mpa. How should the flanges for the equipment and the piping be selected?
Thread Content
For the equipment flange, I chose S31008; I calculated it myself. What about the pipe flange? Are there any standard options? Do I still have to calculate them one by one? The workload is a bit heavy!
S31008 (GB/T14976) is used for the takeover pipes, S30408 (HG/T20615, Class 300) is used for the pipe flanges, high-temperature mica composite sheets are used as gaskets, and S30408 is used for the fasteners. The above are theoretically available. Can welding be used as a connection method?
Refer to HGT 20592~20635-2009 for steel pipe flanges, gaskets, and fasteners; is 300LB a bit high?
As for the medium, 310 isn’t necessary either; we just use sulfuric acid
For 20592-20615, the flanges have specified pressure and temperature ratings; the maximum temperature allowed is 600°C – it cannot be used at temperatures higher than that!
310 is due to high temperatures. . . . . .
I just checked – for group 2.1 in 20615, the 300LB temperature rating allows for 775°C; it can indeed be used, and welding is permitted. Thank you! Why is it only 600℃ in 20592? :handshake
Carbon steel + thermal insulation lining, with stainless steel fittings.
These materials have been used to the extreme; that’s not right. It’s better to use specialized materials instead