It indicates the use of a type a stubend under the heading of joints without. Length a and radius r are applicable for schedule 40s or thinner. Jul 27, 2016 lap joint flanges are very similar to a slipon flange, with the main difference being that it has a curved radius at the bore and face to house a lap joint stub end. Guru gautam steel is one of the leaders amongst manufacturers and exporters of asme b16. The stub end, which essentially a short length of pipe, which has one end that is flared outwards and the other end prepared to be welded to pipe of the same nominal pipe size nps, material and of a similar wall thickness. Lap joint stub ends mss sp43 dimensions based on mss sp43 notes dimensions quoted in mm are equivalents of the inch dimensions i. Stubend and lap joint flange spec setup autocad plant. To ensure tight joints, chamfers on the id side of the flange are required. The buttweld stub end manufactured using superior grade raw materials. How to add stub ends and lap joint flanges to a specification sheet so these parts can be used in a 3d model for plant 3d. We are globally well renowned as the best quality buttweld fittings manufacturer in india. Lap joint stub end inch dimensions as per asme b16. Astm a105 f304l, f316l carbon steel lap joint flanges, stub end, rf, ansi b16.
Lap joint stub end fittings are mechanical joints that comprises of two components. Type a type a stub ends are for use with standard lap joint flanges. Dimensions of stub ends schedule 10s 40s according to mss sp43, type a schedule 10s short pattern nps od t g f r kg 12 21. Stub ends are fittings used in place of welded flanges where rotating back up flanges are desired.
Stub end a stub end always will be used with a lap joint flange, as a backing flange. Stainless steel lap joint flanges stainless lap joint flanges. The lap thickness of the stub end typically meets the thickness of the schedule pipe it accompanies, and the exterior of the base has a curved machine radius for the lap joint flange to mate flush over the stub end. This radius is necessary to have the flange accommodate a lap joint stub end. Lap joint stub end butt weld fitting ss304 welded domesticproduct features. These are ideal for systems whose design layout may change or are frequently disassembled. 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. Lap joint flange dimensions class 300, 400, 600, 900, 1500, 2500 up to 24 inch asme b16. Some advantages of the lap joint flange is ease of application to the pipe system, and with the lack of contact with internal fluids of the pipe, the flange has an. Lap joint flanges and stubend assemblies are typically used in situations where frequent dismantling is. Lap join stub end, stainless steel stub end, lap joint stub. Dimensions of lap joint stub ends standard ansiasme b16.
Butt weld fitting lap joint stub end guru gautam steels. On a lap joint, the flange slides over the pipe and the stub end is the connection where the gasket sits. This datasheet is for lap joint flanges that have a flat face connection. 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. 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.
Easily assembled and aligned, it is favoured in low pressure applications. Stub ends are buttweld fittings that can be used in combination with a lap joint flange alternatively to welding. Therefore, the purchaser must specify long or short pattern fitting when ordering. Lap joint flange dimensions class 150 to class 2500.
The stub end, which essentially a short length of pipe, which has one end that is flared outwards and the other end prepared to be welded to pipe of the same nominal pipe size nps. Stub end types and specifications octal pipe fittings. The benefit of this is that there will not be any issues with bolt hole alignment. The mating surfaces of the stub end and the lap joint flange have a matching profile and surface. The lap joint stub end is the fittings that are used in place of welded flanges when the support of rotating back up flanges is required.
The only way to do that is to pull some pipe off the back of the lap joint flange which will make the stub end show up. Ss316 a molybdenum stainless steel that provides excellent tensile creep and stressrupture strengths at elevated temperatures additional ss316 material information. Lap join stub end, stainless steel stub end, lap joint. Lap joint stub end butt weld fitting ss316 welded import. Stubend and lap joint flange spec setup autocad plant 3d. Lap joint stub ends standard weight inches pounds nominal pipe size outside diameter inside diameter wall and lap thickness lap diameter g fillet radius r overall length f pipe schedule approximate weight in pounds. Lap joint flanges and stub end assemblies are typically used in situations where frequent dismantling is required for for inspection. Stub ends are used in conjunction with lap joint flanges. Also, type a has its outside corner radius to receive lap joint flanges.
Stub ends lap joint welded, seamless, short pattern, long pattern metline industries is a leading india based manufacturer, exporter and supplier of high quality, high performance stub end lap joint fittings in all major grades and dimensions. The lap joint flange is practically identical to a slipon flange except it has a radius at the intersection of the bore and flange face. A lap joint flange, abbreviated as ljf, is a flange that consists of two parts, a stub end and the backing flange. Jason drew, designated support specialist at autodesk enterprise priority. This allows the flanges to swivel freely to easily align bolt holes. Lap joint flange class 150 inches pounds service metal. Dimensional tolerances are in millimeters unless otherwise indicated. Lap joint stub ends standard weight inches pounds nominal pipe size outside diameter inside diameter wall and lap thickness lap diameter g. The stub end is then butt welded to the pipe, and the flange ring can be rotated to align with the mating flange.
Lap joint stub end the mated pair to a lap joint flange. Lap joint these are always used with either a stub end or a taft which is buttwelded to the pipe with the flange loose behind it. A pipe is typically welded to the stub end and the lap joint is free to rotate around the stub end. In a stainless steel pipe system, for example, a carbon steel flange can be applied, because they are not come in contact. Please note that actual weight of a lap joint stub end from a particular manufacturer may vary depending on manufacturing process. Jan 10, 2016 a lap joint flange, abbreviated as ljf, is a flange that consists of two parts, a stub end and the backing flange. Ss304 a common standard for stainless steel due to its malleability high corrosive resistance weldability additional ss304 material information. Approximate weight of a lap joint stub end can be calculated based on its its wall thickness, length and lap diameter. Lap joint stub end is a fitting that is used replace welded flanges when the support of a rotating back up flange is required. Stainless steel lap joint flanges dont have a raised face.
Mss sp43 only covers stainless steel buttweld fittings made for use with schedule 5s and 10s pipe. We cater an ample assortment of buttweld fittings which is incorporated using high technology machines. Some advantages of the lap joint flange is ease of application to the pipe system, and with the lack of contact with internal fluids of the pipe, the flange has an extra extended life. Mss type a stub ends are the industry norm and are utilized with standard flat face lap joint flanges. In a stainless steel pipe system, for example, a carbon. Lap joints are shaped to accommodate the stub end figure 4. A lap joint flange is a twocomponent assembly, with a stub end that has a lap joint ring flange placed over it. Stub end dimensions schedule 10s, mss sp43, nps 12 nps 24. Thus the stub end or the taft always provides the sealing face. Product lines dimensions in inches ldep cfos 38la usewith 38lj. Using stub ends allows sections of the line to be opened for cleaning, inspection, or quick replacement etc, without the need to reweld. And it can be supplied in standard and nonstandard ansi dimension that is used for connecting pipes of different diameter.
Ive been somewhat successful in getting a stub end lap joint flange to connect to another stub end lap joing flange but the problem comes when i try to connect to an equipm. To reduce cost these backing flanges can be supplied without a hub. Stub end dimensions schedule 10s, mss sp43, nps 12 nps. The lap joint flange slips over the end of the pipe and bolted to it with a lap joint stub end. A lapjoint flange is a twocomponent assembly, with a stub end that has a lapjoint ring flange placed over it. This 14vb stub end is used to adapt an industrial pipe flange to sanitary butt weld in applications for the food. Stainless steel lap joint flanges stainless lap joint. This flange connections are applied, in lowpressure and non critical applications, and is a cheap method of flanging. When short pattern stub ends are used with larger flanges in classes 300 and 600,with most sizes in classes 900 and higher,and when long pattern stub ends are used with larger flanges in classes 1500 and 2500,it may.
Stub ends are manufactured in three different types and two standard lenghts. Product lines dimensions in inches ldep cfos 38sa usewith 38lj. Lap joint pipe flanges fit over the pipe and are most commonly used with stub end fittings. The lap thickness of type a stub ends is the minimum wall thickness of the connected pipe. Lap joint stub end weight calculator the piping engineering. The lap of these type of stub ends has generally a serrated face. Normally, a lap joint flange and a lap joint stub end are mated together is an assembly system. The lap thickness of type b stub ends is the minimum wt of the connecting pipe. Lap joint flanges fit over a pipe with a flared or stub end. Lap joint stub end butt weld fitting ss316 welded importproduct features. Jero lap joint stub ends finish dimension chart all dimensions are in accordance with ansi b16.
The lap thickness on the stub end is greater than, or equal to, the nominal thickness of the pipe wall. Od of barrel max and min dimensions in and mm are rounded. Mss sp43 only covers stainless steel buttweld fittings made for use with schedule 5s and 10s pipe and stub ends suitable for. Finished dimensions 12 to 60 jero lap joint stub ends finish dimension chart all dimensions are in accordance with ansi b16. Ss316 a molybdenum stainless steel that provides excellent tensile creep and stressrupture strengths at elevated temperatures additional ss316. This precision crafted sanitary lap joint stub end comes standard with a mill finish. Lap join stub end the lap joint stub end is the fittings that are used in place of welded flanges when the support of rotating back up flanges is required. Then you have to move an elbow to the back of the stub end then delete the pipe then rightclick.
This type of flange connection is particularly useful for large or hardtoadjust. Notes weights are based on manufacturers data and are approximate. Lap joint flanges,stub end lap joint flanges,lap joint. Maurice stewart, in surface production operations, 2016. Sometimes we need to place an elbow or something right on the back of a stub end. How to add stubends and lap joint flanges to a specification sheet so these parts can be used in a 3d model for plant 3d. The material could be carbon steel,alloy steel and stainless steel material. Top line 14vb lap joint stub end is made of type 316l stainless steel which has a lower carbon content than 304 stainless steel, making it easier to weld and offers better corrosion resistance. Lap joint flange dimensions are covered in asme b16.