Types of flange, and selection

Several different types of flange are used for various applications. The principal types used in the process industries are  

Lap-joint flanges are sometimes known as Van-stone flanges . 

Blind flanges (blank flanges) are flat plates, used to blank off flange connections, and as covers for manholes and inspection ports. 

Gasket material Gasket factor m Min. design seating stress y(N/mm2) Sketches Minimum gasket width (mm) 

Flat metal jacketed Iron or soft steel 3.75 52.4  

Solid flat metal Iron or soft steel Monel or 4 to 6 5.50 124 

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