Hi,
I have the special situation that our boiler drum blowdown valve starts leaking after a view open / close operations. I have inquired various valve manufacturers and we even tried different hardfacings, etc. but none of the valves work for a sufficient time.
Now it is the used valve type...
Dear all,
we are facing problems with proper condensate removal in "old" steam distribution piping. I was wondering whether there is good literature available describing this topic especially at which distance to put steam traps, start up dewatering devices, slopes, etc. and how to maintain the...
Hi,
I am currently struggling to work out a "hot spot evaluation procedure". We frequently face the problem of hot spots on pressure vessels with refractory lining. Without an obvious reason a hot spot may arise during operation which in the worst case forces a plant shutdown.
I was informed...
Hi,
we have a CO2 Absorbing plant in Operation which uses "Benfield" lye as absorbant. Most parts of the System are made of Carbon steel. Nevertheless, we face some Problems with the few parts made of Nickelalloy and Chromium Carbide.
The Nickel alloy was completely desolved after 1y Service...
Hi,
we are currently facing problems with valves in a Benfield solution line. We are using ball valves (Class 900, 6"). The ball valves are made of stainless steel (316L) with the ball and the seat being hardened with Chromium Carbide. It seems like the Chroumium Carbide hardfacing is...
Hi,
I am currently facing some problems with below sealed globe valves used in cryogenic service (down to -40°C).
After only two to three actuations, the spindle gets stuck to the plug in the area where the rotational is tranlated to a linear movement. We have around 14bar in the system and...
Hello,
I am in search for a manufacturer for On/Off valves for syngas service for a Syngas purging line.
Design conditions:
Pressure: 190bar (to atmosphere)
Temperature: -33°C/50°C
Size: DN50 or DN80
Housing material: Carbon steel
We have traces of catalyst in the purge gas which is a very...
Hy,
I am just trying to figure out what happens to the metal grain structure of A/SA516 - Grade 60 material when it is temporary heated to 500°C for lets say 5h and then cooled to ambient temperature during operation of a pressure vessel. Will the material be subjet to embrittlement or creep...
Hello,
I like to adress this post to all collegues who are involved with steels at elevated temperatures like boilers, coloums, etc.
I am working on a very special case where the chamber of a heat exchanger made of 1.7380 (apprx. ASTM 217-WC9) was found to have a crack.
The codes (EN as well...
