ABSTRACT
The weld-neck taper-hub flange (Fig. 2A), with its relatively narrow raised face to accommodate the gasket, is a common choice for high duty applications. Its reinforcing hub gives it extra rotational stiffness, which reduces stresses in the metal and gives a better environment for the gasket. It is usually less expensive to extend or thicken the hub than to increase the axial thickness or diameter of the flange proper.
