The use of stub ends has these two advantages: Reduces the overall cost of the flanged joint A Lap Joint Flange, which is used to actually bolt the two lengths of pipe together.The stub end, which is essentially a piece of pipe, with one end flared outwards and the other prepared to be welded to a pipe of the same bore size (NPS = nominal pipe size), material and wall thickness. The most widely used fabrication tool for stub ends is the flaring machine, which is able to flare the end of the pipe and then cuts it to length.
The two devices to be combined, in this case, are: STUB END APPLICATIONĪ stud end and a lap joint flange can be used together as an alternative way to make a flanged connection than welding neck flanges. Stub ends are available in short and long pattern (ASA and MSS stub ends), in sizes up to 80 inches. The use of stub ends has two advantages: it can reduce the total cost of flanged joints for piping systems in high material grades (as the lap joint flange does not need to be of the same material of the pipe and the stub end but can be a lower grade) it speeds up the installation process, as the lap joint flange can be rotated to facilitate the alignment of the bolt holes. What is a stub end and why should it be used? Stub ends are buttweld fittings that can be used (in combination with a lap joint flange) alternatively to welding neck flanges to make flanged connections.
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