When Do We Use Slip-On Flange, A Weld Neck Flange Or A Lap Joint Flange
There are few types of flanges , but the most used types by ASME B16.5 are weld neck, slip-on, and lap joint flange. Weld Neck Flange These are easy to recognize at the long tapered hub. It goes gradually over to the thickness of the wall from a fitting or pipe. The long tapered hub provides an essential reinforcement for use in several applications that involve elevated, sub-zero temperatures or high pressure. The smooth transition from fitting or pipe wall thickness to flange thickness gets affected by the taper and is extremely beneficial under the conditions of repeated bending caused by the line expansion or other variable forces. Slip-on Flange The calculated strength from a slip-on flange under internal pressure is of around two-thirds of the Welding Neck flanges, and their life under fatigue is about one-third that of the latter. The connection with the pipe is about 2 fillet welds, as well at the outside as also at the inside of the flange. Lap Joint Flange Lap Joint Flanges