I'm working on a project were we're installing a large (2300 hp) compressor to an offshore oil production facility.
One of the piping ISO's (pipe spool drawings) inadvertenly called for 3" carbon steel flanges on a 316 stainless steel 3" sch 80 pipe. The pipe is a short section of natural gas vent line which never sees any pressure over say 5 psig max. The exterior of the pipe will be painted. The interior will see natural gas with some trace water and hydrocarbon condensate. This pipe has been fabricated and is ready to install.
The client is concerned about galvanic corrosion. Do you guys feel this concern is valid?