Short pattern stub ends are used with larger flanges in classes 300 and 600, and with most sizes in class 900 and higher. Stub end dimensions schedule std and xs, nps 12 nps 24. The socket weld flange is bored to the id of the pipe and counter bored. The flange is then slipped over the stub end and bolted up.
Stainless steel stub ends filter by 2 in 26 3 in 24 6 in 21 4 in 20 1 in 15 112 in 15 10 in 15 8 in 14 12 in 10 12 in 8 14 in 7 212 in 7 34 in 7 16 in. Stub end are offered in three different ways, type a, b and c. Type a stub end weld fittings stainless steel fittings. The lap thickness of type b stub ends is the minimum wt of the connecting pipe. Slipon flanges cannot be used with many types of fittings as the fitting ends are not. Steel fittings, weld fittings, pipe fittings, steel pipe fittings, stainless steel fittings, butt weld fittings, carbon steel fittings, stainless steel pipe fittings, elbow, tee, cross, pipe reducer, pipe cap, stub end. A stud end and a lap joint flange can be used together as an alternative way to make a flanged connection than welding neck flanges the two devices to be combined, in this case, are. And it can be supplied in standard and nonstandard ansi dimension that is used for connecting pipes of different diameter. The types of flanges for piping explained projectmaterials. Lap joint flanges feature a flat face and are always. 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. The use of lap joint flanges in combination with stub ends is a costeffective solution for stainless steel or nickel alloy pipelines, as the material of the lap joint flange can be of a lower grade generally carbon steel than the material of the stub end which has to match the pipe grade, as in contact with the conveyed fluid. Stub ends best pipe fittings, steel fittings, stainless. Stub end a stub end always will be used with a lap joint flange, as a backing flange.
These types of flanges are used in high pressure and temperature application. Mss sp43 only covers stainless steel buttweld fittings made for use with schedule 5s and 10s pipe and stub ends suitable for use with schedule 40s pipe, as defined in asme b36. Optional galvanised backing rings can be machined to suit stub flange full face stub flanges with ss backing rings table d drilling as4087 pn16, as2129 table d t a pcd dn d1 l1 t l a pcd dn d1 l1 slotted ff stub flange. Long pattern stub ends are also known as asa stub ends. Lap joint stub end is a fitting that is used replace welded flanges when the support of a rotating back up flange is required.
Manual welding welding in whpressure of the media flowing into the valve. The lap of these type of stub ends has generally a serrated face. When long pattern stub ends are used with flanges in classes 1500 and 2500, it may be necessary to increase the length a. Shop now for great pricing on stainless steel fittings, stub ends available in schedule 10, mss type a. Type c stub ends can be used either with lap joint or slipon flanges and are manufactured from pipes. The engineer or designer must choose among several flange. This flange connections are applied, in lowpressure and non critical applications, and is a cheap method of flanging. The lapjoint flange figure 4 requires a compan ion lap joint, or type a stub end stub ends are described. To ensure tight joints, chamfers on the id side of the flange are required. Learn different types of pipe flanges used in piping. Stub end types and specifications octal pipe fittings. Lightweight corrosion resistant stub ends fittings are defined in mss sp43. These types of flanges are used with another type of flange to isolate the piping system or to terminate the piping as an end.
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