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  1. mrcaptainplanet

    PN325 standard for flanges

    Hi, An old plant I'm dealing with replacing some piping for uses a PN325 standard for its flanges. This is not covered in DIN EN 1092-1, and from what I can tell from my research (read: googling), the PN325 is a company standard made by the now defunct German IG group, and but is still somewhat...
  2. mrcaptainplanet

    Air Ingress to Flare Stack with No Purge Flow

    Thank you for the reply. I think that if the time is so short my preference is to install a switch for low flow or pressure in that will automatically start the flow of natural gas. As you said better to not take credit for operator intervention.
  3. mrcaptainplanet

    Air Ingress to Flare Stack with No Purge Flow

    Hello all I have a question dealing with what will occur if the purge gas to flare system (nitrogen) has a supply failure. The flare is equipped with velocity seal. I see from John Sink and API521 that this describes oxygen levels below the seal as they will rise almost immediately after purge...

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