Since I posted the original message we determined the cause of the flange leak was excessive stresses imposed by the inlet piping. The piping has been redesigned and the flanges refaced. We haven't had a problem since.
Since I posted the original message we determined the cause of the flange leak was excessive stresses imposed by the inlet piping. The piping has been redesigned and the flanges refaced. We haven't had a problem since.
Grab a sample and have a lab analyze. They can tell you what it is. If the temperature is right at this location then sulphur could be condensing out. The melting point of sulphur is somewhere around 300F.
Dpearcey
We have had problems with leaks on the flanged connections on our vertical platforming unit combined feed exchangers. We have steam rings installed to manage any leaks when they occur. The gasket is a double jacketed grafoil filled. Anyone else out there with a similar problem? Are steam...
We have had problems with leaks on the flanged connections on our vertical platforming unit combined feed exchangers. We have steam rings installed to manage any leaks when they occur. The gasket is a double jacketed grafoil filled. Anyone else out there with a similar problem? Are steam...
Thx for the info. After considerable discussion in-house and with metallurgists, we settled on a 400 F bakeout for 2 hours. A colleage later showed me minutes of a NPRA conference where a refinery specified 450F for 2 hours for wet H2S service (1/2" thick material).
Where can I find reference material when a hydrogen bakeout is required for a repair? Presently, I'm working on a procedure to replace a 2" nozzle in the water boot of a DHT steam receiver, sour with H2S. The design is 135 psig @ 375F. The 2" nozzle is xxs and the boot itself is...
I am reviewing our plant standards with respect to material specs on our forged fittings and valves, etc. Is SA105 Normalized the preferred spec for this material in pressure service. I seem to recall it is but can't find any hard fast data. Can someone point me to any discussion papers or...
