Pressure class rating of Flanges.
Pressure class rating of Flanges.
(OP)
Following Design conditions...
20 bar and 400˚C
30 bar and 300˚C
What would be the class rating required to do the job?
20 bar and 400˚C
30 bar and 300˚C
What would be the class rating required to do the job?





RE: Pressure class rating of Flanges.
RE: Pressure class rating of Flanges.
RE: Pressure class rating of Flanges.
http://www.gowelding.com/pv/flange.htm
RE: Pressure class rating of Flanges.
RE: Pressure class rating of Flanges.
Checking for 20 bar 400 deg C and 30 bar 300 deg C indicates that Class 150 is out above 15.9 bar at ambient. Class 300 is good for 30.7 bar at 300 deg C and 28.3 bar at 400 deg C. Most groups accomodate 30 bar at 400 degree C. Exclude B 564 Gr N08810. Some materials are not rated 400 deg C at any pressure like A 351 Gr. CN7M; N08700. A bad example is B 160 Gr. N02201 requiring Class 600 with foo deg C and 30.4 bar. Class 600 is required for A351 Gr CK20, CH8, CH20, .... But wait. Type 316L & type 304L are only rated 24.3 bar at 400 deg C in Class 300. F316, F316H, F317 Cl 600 above 28.4 deg C; F304, F304H etc. require Class 600 above 29.4 bar. Is carbon steel OK? Not A 350 Gr. LF1 Ci. 1 rated 29.3 on table 2-1.4.
Again, this data is out of date. Check the material but many materials permit nearly 30 bar at 400 deg C. Use the current code cause this just ain't right by current ASME B16.5. Over NPS 24? I ain't gonna look. Regards.
RE: Pressure class rating of Flanges.
RE: Pressure class rating of Flanges.
RE: Pressure class rating of Flanges.