We are manufacturing reducing flanges that are ideal for changing line size. A word of precaution that these should not be used in case it is expected that abrupt transition might create unwanted turbulence, at the pump connections; the reducing flange has one large flange with one accurate diameter with bore of a small diameter. These specialty flanges are used on projects wherein a common requirement is to fit together various sized pipes. Different types available are weld-neck, slip-on and threaded. Their purpose is to alter diameters in piping system.