Stub end dimensions schedule 10s, mss sp43, nps 12 nps. Additional lap thickness must be provided for special facings e. Email this page download pdf download pdf printable page. Lap joint stub ends mss sp43 dimensions based on mss sp43 notes dimensions quoted in mm are equivalents of the inch dimensions i. Sometimes we need to place an elbow or something right on the back of a stub end. It is also used in the erection of largediameter or hardtoadjust piping configurations because of its quick bolt hole alignment. Dimensions of lap joint stub ends standard ansiasme b16. Attachment of the lapjoint flange to the piping system requires a lapjoint stub end. Mss sp43 only covers stainless steel buttweld fittings made for use with schedule 5s and 10s pipe.
It is slipped over the pipe and a stub end is welded onto the pipe. Stainless steel lap joint flanges stainless lap joint. Lap joint flanges are used on piping fitted with with lapped pipe or with lap joint stub ends. Simplex steel industries buttweld lap joint stub end of different shapes and sizes and with different specifications as per the customers requirement.
A lap joint flange, which is used to actually bolt the two lengths of pipe together. The stub end is welded to the pipe with the flange free fitting around the pipe. The lap joint flange slips over the end of the pipe and bolted to it with a lap joint stub end. A lap joint is the joint between two pieces of metal in which the edges or ends are overlapped and fastened together to produce a continuous or flush surface. Lap joint stub end detailed info for lap joint stub end,lab. Short pattern stub ends are used with larger flanges in classes 300 and 600, and with most sizes in class 900 and higher. The types of flanges for piping explained projectmaterials. 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. The lap thickness on the stub end is greater than, or equal to, the nominal thickness of the pipe wall. Easily assembled and aligned, it is favoured in low pressure applications.
A wide variety of lap joint stub ends options are available to you, such as head code, shape, and connection. I know this is an old topic, but im designing for a client that welds stub ends directly to plain end nozzles on equipment. About 61% of these are pipe fittings, 25% are flanges. The flange is then slipped over the stub end and bolted up. Product lines dimensions in inches ldep cfos 38sa usewith 38lj. Both asaa and mssa patterns are used with lap joint flanges.
As already described before, the most used flange types asme b16. Radius of fillet b is only effective to mss sp43 lap joint stub ends. The benefit of this is that there will not be any issues with bolt hole alignment. Approximate weight of a lap joint stub end can be calculated based on its its wall thickness, length and lap diameter. For example, i have the same flange in stainless steel, this is a stainless steel 304 flange. A pipe is usually welded to the stub end and the lap joint pipe flange is free to rotate around the stub end. This 14vb stub end is used to adapt an industrial pipe flange to sanitary butt weld in applications for the food. You need to have a stub end and that is the purpose of that little radius right there. Length a and radius r are applicable for schedule 40s or thinner. Then you have to move an elbow to the back of the stub end then delete the pipe then rightclick.
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. The lapjoint flange and stub end assembly are used mainly in piping systems that necessitate frequent dismantling for inspection or routine maintenance. Lapjoint flanges do not have raised faces and a single connection requires both. Lap joint stub ends standard weight inches pounds nominal pipe size outside diameter inside diameter wall and lap thickness lap diameter g. Lap joint flange dimensions class 300, 400, 600, 900, 1500, 2500 up to 24 inch asme b16. Butt weld fitting lap joint stub end guru gautam steels. Contact faces of stub ends shall have a concentric serration or spiral according to the purchasers requirements. Lap joint stub end fittings are mechanical joints that comprises of two components. Several types of lap joint techniques exist and are employed depending on the type of materials, shape, and thickness of the parts or the application of the jointed object. Lap joint flange class 150 inches pounds service metal.
When long pattern stub ends are used with flanges in classes 1500 and 2500, it may be necessary to increase the length a. For joining ips or di size polyethylene pipe to any ansi. Stub end, lap joint stub end, lap joints, vanstone flared laps. Lap joint pipe flanges slide directly over the pipe and are most commonly used with stub end fittings. Jero lap joint stub ends finish dimension chart all dimensions are in accordance with ansi b16. Welding neck, slip on, socket weld, lap joint, threaded and blind flange. Specialty flange and fitting products lap joint flange. 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. In pressure classes 150 and 300, the height of raised face is approximately 1.
Lap joint flanges and stud bolts dimensions asme b16. Stub ends, lap joint stub end, lap joints, vanstone flared laps. Stub end types and specifications octal pipe fittings. We manufacture to your specifications in stainless steel or carbon steel with ends preps including beveled, squared, grooved, flanged and threaded. We are globally well renowned as the best quality buttweld fittings manufacturer in india. Custom stub end pipe fittings are the specialty of united states fittings. Lap joint flange dimensions class 150 to class 2500. 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. When bolts are added, the clamping action of the bolts presses the rotating back up flange against the back of the stub end. Schedules jero offers stub ends in all nps schedules.
Lap joint stub end butt weld fitting ss316 welded importproduct features. Steel pipe connectors, welding fittings, pipe fittings, elbows, tee, reducer, stainless products. Bolting pressure is transmitted to the gasket from the flange against the back of the pipe lap to produce a seal. For the height measures h and b of all described dimensions of flanges on this website, with exception of the lap joint flange, it is important to understand and remember the following. Lap joint flanges with stub ends not working what we ended up doing was making a copy of the lap flanges in our catalog and changed the facing to say rf, because this flange is always used with a stub end effectively making it a raised face flange. Od of barrel max and min dimensions in and mm are rounded. Lap joint stub end weight calculator the piping engineering. Type a type a stub ends are for use with standard lap joint flanges. 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.
The number one feature and advantage of lap joint flanges is that they have superb manueverability. Stub ends, long stubends, short stubends, lap joint stubend. The lap joint is favoured in low pressure applications because it is easily assembled and aligned. Lap joint flanges,stub end lap joint flanges,lap joint. When you shut down your line to replace slip on or lap joint flanges, your equipment is not producing. Lap joint stub ends are flared pipes that accommodate slip on 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 used in conjunction with lap joint flanges. To reduce cost these backing flanges can be supplied without a hub. Lap joint flanges are used with a corresponding stub end that inserts in the inside of the flange. The material could be carbon steel,alloy steel and stainless steel material.
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. The lap thickness of type a stub ends is the minimum wall thickness of the connected pipe. And it can be supplied in standard and nonstandard ansi dimension that is used for connecting pipes of different diameter. Lap joint flange dimensions are covered in asme b16. These lengths and radius apply for schedule 40s or thinner stainless steel pipes. Guru gautam steel is one of the leaders amongst manufacturers and exporters of asme b16. Lap joint standard weight inches pounds nominal pipe size outside diameter inside diameter wall and lap thickness lap diameter g fillet radius r overall length. Dimensional tolerances are in millimeters unless otherwise indicated. Schedule 180 lr seamless weld astm a335 thickness of special. This radius is necessary to have the flange accommodate a lap joint stub end. About 54% of these are pipe fittings, 0% are valves. Lap joint flange class 150,class 300,class 400,class 600,class 900,class 1500 and class 2500 dimensions. Contact faces of stub ends shall have a modified spiral or concentric. 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.
The lap joint flange with the stub end assembly are normally used in systems requiring frequent dismantling for inspection and cleaning and where the ability to swivel flanges and to align bolt holes materially eases the erection of large diameter or unusually stiff piping. They are also called lap joints and vanstone flared laps. 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. Manual welding welding in whpressure of the media flowing into the valve. 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. 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. The socket weld flange is bored to the id of the pipe and counter bored. Lap joint stub end, which is widely used in petroleum, chemical, power, gas, metallurgy, shipbuilding and construction industries. Stainless steel lap joint flanges stainless lap joint flanges. Simplex steel is the world leader in buttweld lap joint stub end. Mss type a stub ends are the industry norm and are utilized with standard flat face lap joint flanges. Ladish seamless welding fittings combine maximum strength. Stubend and lap joint flange spec setup autocad plant 3d.
Astm a105 f304l, f316l carbon steel lap joint flanges, stub end, rf, ansi b16. Stubend and lap joint flange spec setup autocad plant. 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. This means the stub end or taft always makes the face. We are committed to providing reasonable prices and fast shipping times on all our orders, and we have no minimum order requirement on these parts. Stainless steel lap joint flanges dont have a raised face. Jason drew, designated support specialist at autodesk enterprise priority.
Lap joint stub end butt weld fitting ss316 welded import. The buttweld stub end manufactured using superior grade raw materials. These lap joint flanges are always used with either a stub end or taft which is butt welded to the pipe with the flange loose behind it. Stub end a stub end always will be used with a lap joint flange, as a backing flange. The contents of this website are presented for information purposes only, and while effort has been made to ensure their accuracy, they are not to be contrived as warranties or guarantees, expressed or implied, regarding the products or services described herein or their use or applicability. Thus the stub end or the taft always provides the sealing face. The lap thickness on the stub end is greater than, or.
In a stainless steel pipe system, for example, a carbon. It is also used in the erection of largediameter or hardtoadjust. This precision crafted sanitary lap joint stub end comes standard with a mill finish. Lap joint flanges are a specialty flange that are used with a corresponding stub end that is inserted into the inside of the flange. Such increases in length shall be a matter of agreement between the manufacturer and purchaser. This datasheet is for lap joint flanges that have a flat face connection. 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. Lap joint flange fabrication canada engineered fabrication. Ss316 a molybdenum stainless steel that provides excellent tensile creep and stressrupture strengths at elevated temperatures additional.
Normally, a lap joint flange and a lap joint stub end are mated together is an assembly system. A wide variety of lap joint flange stub ends options are available to you, such as shape, connection, and material. Lap joint bored slightly larger than the od of the pipe, the radius on the bottom matches the radius on the stub end. The radius is for the stub end, so you do like this and thats why its called a lap joint flange. 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. The outside the stub end and the lap joint flange have a matching profile and surface. The main benefit of this type of flange, is that once the pipe welds to the insert stub end, the flange then can rotate for easier alignment of the bolting holes. Also, type a has its outside corner radius to receive lap joint flanges. The metal lap joint flange ljf crosssection geometry may be a rectangular solid or a contoured crosssection. Other stub sizes and flange drillings can be machined to order. A rotating back up flange seats itself against the back surface of the stub end. Mss sp43 only covers stainless steel buttweld fittings made for use with schedule 5s and 10s pipe and stub ends suitable for. Custom stub end flange pipe fitting united states fittings.
Lap joint flanges are used in conjunction with lap joint stub ends. Lap joint flanges have all the same common dimensions as any other flange named on this page however it does not have a raised face, they used in conjunction with a lap joint stub end. Please note that actual weight of a lap joint stub end from a particular manufacturer may vary depending on manufacturing process. This flange connections are applied, in lowpressure and non critical applications, and is a cheap method of flanging. Lap joint stub ends lap joints also named stub ends and vanstone flared laps,it is used in place of welded flanges where rotating back up flanges are desired. Stub end dimensions schedule 10s, mss sp43, nps 12 nps 24.
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