We are going for the BS EN 12953 as a design code for Shell boilers. The code does not specifically mention baffles on the shell side. As there is requirement to have "breathing space between tubes and shell, there is possibility of water not going across the tubes. Are baffles allowed within...
Looking at designing a waste heat recovery unit to pre-heat boiler feed water from 100 deg C to 140 at 30 barg, with hot gasses at 245 deg C at 20 mbarg. Gas is on the tube side due to solid contamination. The design is such that the shell will fit into the duct work via the duct flanges welded...
The IP 15 3rd Edition covers the hazardous zone produced by flanges, seals and also casing failure. The recommendation for the casing failure is to to use a hole size equivalent to 10% of the pump discharge diameter.
We have a Thermal fluid operating above its flash point. This results in...
We have two packed H2S absorber towers (5m diameter, 15m tan/tan) in our natural gas treatment units for final polishing to reduce the H2S, which do not have any relief valves. The plant is approximately 20 years old. A recent HAZOP has identified the need for fire relief. We have fail open...
Thanks Dcasto/flareman for the info.
At present we have 2 different cold flare systems on our remote unmanned gas platforms(sweet gas). The old platforms approx 1990, have a fuel gas purge on the cold flare header.The vents are for topside blowdown and are 8" NB.
On the newer installation...
I am looking at the need to purge the cold vent line with nitrogen to avoid possible exploxive mixture in the cold vent header. At present the process (Methane)blowdown is connected to the cold vent header. We previously used fuel gas as purge gas to avoid air ingress into the header. I have...
I am trying to understand on what basis is a centrifugal compressor surge control valve sized. So far I have seen the following basis:
a) 1.8 to 2.2 times the CV at surge control line
b) 0.9 to 1.1 times CV calculated at intersection of horizontal line from design point with 105 % speed.
c)...
