- 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.
- A Lap Joint Flange, which is used to actually bolt the two lengths of pipe together.
BENEFITS OF LAP JOINT STUB ENDS
· Reduces the overall cost of the flanged joint
· Facilitates the installation of the flange
- The first type (A) is manufactured and machined to match standard lap joint backing flange (the two products have to be used in combination). The mating surfaces have an identical profile to permit a smooth loading of the flare face
- Stub ends type B are have to be used with standard slip-on flanges
- Type C stub ends can be used either with lap joint or slip-on flanges and are manufactured from pipes.
- the short pattern, called MSS-A stub ends
- the long pattern, called ASA-A stub ends (or ANSI length stub end)
- Beveled Ends
- Squared Ends
- Flanged Ends
- Grooved Ends
- Threaded Ends (Male Only)