Flange

integral pipe flange

steel pipe flange

threaded flange

slip-on flange (SO)

slip-on welding flange

socket welding flange

lap joint flange (LJF)

welding neckflange (WNF)

blind flange

orifice flange

reducing flange

pad type flange

loose hubbed flange

welding plate flange

welding neck collar welding-on collar

stub end, lap

lapped pipe end

loose plate flange

pressure rating, pressure rating class

pressure-temperature rating

flange facing

raised face (RF)

male face (MF)

female face (FMF)

tongue face groove face

ring joint face

flat face; Full face (FF)

smooth raised face (SRF)

facing finish

roughness

smooth

serrated root mean square (RMS)

arithmetical average roughness height (AARH)

companion-flangebolt circle (B. C. )