What is this sealing surface?
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Help, what kind of sealing surface is this?
Convex RF face; in practice we usually call it a flat flange (it’s just called that this way – the professional term remains RF)
To use local slang, it’s called a flange with male and female fittings: lol
The apparent pressure rating is CL150
Rough-faced flanges are generally used under high pressures, as well as in high-temperature and high-pressure environments
This convex flange RF is stronger than the FF flat flange, but weaker than the MFM concave-convex flange