As a reference, here is one ceramic thermowell application in the refractory lined reactor service. It has ceramic tube inside the refractory lined nozzle, and equipped with N2 purge on the thermocouple as well...
Supposed that the purpose of the isolation valves are added close to the drum of the liquid sulfur source and to be isolated it from one drum from the other. So, one it can be shutdown one unit w/o impacting to the other unit.
IMO, if agreed with O&M, the valve may be installed at a proper...
IMO, in the CAD drawings the typical colors of the text and lines are recommended in the software application and used as a default color codes. If required, the users may modify or define other colors for the specific needs.
The Cv values of the ball valves may be different for the full port type from the reduced port. Yes, the flow resistance of the full open ball valve may be insignificant in the piping system, but the Cv of the full port ball valve is to be smaller than the reduced port valve.
Typically, you may request the vendor to provide the Cv value of the specific valve on your piping system.
Also, an engineering reference for calculating the Cv of the piping and fittings can be found in the Crane technical paper- Flow of Fluids.
It should be no issue for the metallic seat & disc valve by using the proper material for the NH3 system. What's the material of the check valves?
Why to replace the valve body and bonnet top as the sealing surface of the valve seat damaged?
If not specified in the Client OE, select a proper painting which is suitable for the environment, such as on-shore, off-shore, etc., and consult with the local vendor as needed.
The number of the hydrants to be in service and/or shutdown may be depended on the required firewater flow as well as the number of the hydrants available in the area. May refer to NFPA 1 or 20 for the additional info.
Also, may contact the AHJ for approval or if additional requirements needed.
Pavan,
In addition to the static head of 15m, do you consider the back pressure of the every branches on the 2" Condensate Header?
IMO, it's not realistic that the conditions of the pumped condensate head and the branches of the "traps" are to be the constant values through the whole Condensate...
It's incorrect to assume the pressure at the team trap outlet or the condensate return header is zero unless it's open to atmosphere. And, it won't work to connect the pumped condensate line to the steam trap header which may block the steam trap or cause water hammer in the actual operation.
The superheated steam is typically dry without too much condensate. But, the function of the steam trap may be needed to be covered from the cold system startup which may generate a high condensate flow. You may confirm it with the Process Engineer and Operation for the startup process.
