Thank you for your answers.
LittleInch:
Posting this in piping forum certainly would be better - I will remember for the future.
My first thought was to replace it with two ASME reducers, but then I thought: since it was drawn in detail and placed right after control valve, maybe it is...
Greetings,
I stumbled upon pipeline size reduction 20" to 8" as shown below. Attached to the flange on the left is flow control valve sized 8" (the pipeline before control valve is 14"). Flow direction is from left to right, liquid is crude oil. Due to this fragment of pipeline being rebuild...
