Flanges are the interface elements in the Industrial piping system. In actual practice at factories, refineries, chemical plants, power stations and offshore platforms, flanges serve the function of more than just a pipe connector and are critical in preventing dangerous fractures/ leaks in a pipelined industrial piping system.
The way a flange face is designed determines whether that joint will seal under pressure or leak when the critical threshold is reached. Therefore, knowing technical names like RF, FF, or RTJ.
In fact, evaluating the right selection of flange face type is one of the most common mistakes that cause chronic leakage problems in industrial piping systems.
Let’s explore each of these face types: RF, FF, and RTJ.
Raised Face (RF) – The Industry Workhorse
Like any circular surface, Raised Face or RF has a peripheral bolt circle from which sealing surfaces of the power flange face













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