Questions regarding flanges and pipes.
Thread Content
I would like to ask everyone: the design temperature and design pressure for pipelines seem a bit inconsistent with those specified in the temperature and pressure rating tables for flanges in HG20592-09. So, what should be used as a reference for the temperature and pressure ratings of pipelines? Is the temperature and pressure rating corresponding to the pipe higher, or is it higher for the flange?
The temperature and pressure ratings of a pipe are reflected through the calculation of its wall thickness. The wall thickness of the pipeline is calculated using the formulas provided in section 6.2 \"Straight pipes\" of the \"GB 50316-2000 Code for Design of Industrial Metal Pipelines (2008 edition)\\", and the appropriate wall thickness is then selected accordingly. Flanges, valves, etc. should be selected according to the temperature and pressure rating tables. For your reference.
Personal opinion: The temperature and pressure ratings for pipelines should be based on the design values； The temperature and pressure ratings for pipes are lower, while those for flanges are higher.
Personal opinion: The temperature and pressure ratings for pipelines should be based on the design values； The temperature and pressure ratings for pipes are lower, while those for flanges are higher.
Of course, it’s the height of the flange that matters. We usually choose the flange after determining the design pressure of the pipeline, and the pressure that the flange can withstand must be at least equal to the design pressure of the pipeline