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. Lap joint stub end is a fitting that is used replace welded flanges when the support of a rotating back up flange is required. 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. You need to have a stub end and that is the purpose of that little radius right there. Lap joint flanges,stub end lap joint flanges,lap joint. Lap join stub end, stainless steel stub end, lap joint. This precision crafted sanitary lap joint stub end comes standard with a mill finish. Stub end types and specifications octal pipe fittings.
A lapjoint flange is a twocomponent assembly, with a stub end that has a lapjoint ring flange placed over it. 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 flange class 150,class 300,class 400,class 600,class 900,class 1500 and class 2500 dimensions. Finished dimensions 12 to 60 jero lap joint stub ends finish dimension chart all dimensions are in accordance with ansi b16. Astm a860 mss sp 75 wphy 56 60 65 70 lap joint stub ends. Type a type a stub ends are for use with standard lap joint flanges. The material could be carbon steel,alloy steel and stainless steel material.
Stainless steel tube fitting lap joint stub, 12 in. 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. This radius is necessary to have the flange accommodate a lap joint stub end. Stub ends, long stubends, short stubends, lap joint. Contact faces of stub ends shall have a concentric serration or spiral according to the purchasers requirements. Lap joint stub end metric dimensions as per asme b16. The lap joint flange, which is a ring backing flange. Lap joint flange dimensions class 150 to class 2500. Lap joints are shaped to accommodate the stub end figure 4. Stockholder of butt weld stub end, buttweld lap joint stub end fittings, stub end type b asme b16.
Lap joint flange dimensions are covered in asme b16. Lap joint flanges, stub end lapjoint shree kesar kanak. Also, type a has its outside corner radius to receive lap joint flanges. The buttweld stub end manufactured using superior grade raw materials. Specialty flange and fitting products lap joint flange.
Lap joint flange class 150 inches pounds service metal. Lap joint stub end manufacturers, suppliers, stockist asme b16. And it can be supplied in standard and nonstandard ansi dimension that is used for connecting pipes of different diameter. Mss type a stub ends are the industry norm and are utilized with standard flat face lap joint flanges. Lap joint stub end manufacturers mss sp43, asme b16. 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. Lap joint flanges lj flanges are used on piping fitted with lapped pipe or with lap joint stub ends the combined initial cost of the two items being approximately onethird higher than that of comparable welding neck flanges. Lap joint pipe flanges slide directly over the pipe and are most commonly used with stub end fittings. Its not the weld that is subject to fatigue but the base material in the stub end of the lap joint flange. 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. Lap joint flanges are used on piping fitted with lapped pipe or with lap joint stub ends. Therefore, the purchaser must specify long or short pattern fitting when ordering.
Metallica is one of the biggest suppliers and manufacturer of lap joint stub ends in india, with sales across the globe. The combination of flange and stub end presents similar geometry to the raised face flange and can be used where severe bending stresses will not occur. Guru gautam steel is one of the leaders amongst manufacturers and exporters of asme b16. Sometimes we need to place an elbow or something right on the back of a stub end. These flanges are nearly identical to a slip on flange with the exception of a radius at the intersection of the flange face and the bore to accommodate the flanged portion of the stub end. Butt weld fitting lap joint stub end guru gautam steels. Whenever youre using a lap joint flange, you use a stub end.
Lap joint stub ends slide directly over the pipe and are most commonly used with stub end fittings. Stub end dimensions schedule 10s, mss sp43, nps 12 nps. 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. 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. Stainless steel stub end pipe fittings are buttweld fittings that can be used in combination with a lap joint flange. A lap joint flange is a twocomponent assembly, with a stub end that has a lap joint ring flange placed over it. Radius of fillet b is only effective to mss sp43 lap joint stub ends. Dimensions of lap joint stub ends standard ansiasme b16. Steel pipe connectors, welding fittings, pipe fittings, elbows, tee, reducer, stainless products. Mss sp43 only covers stainless steel buttweld fittings made for use with schedule 5s and 10s pipe and stub ends suitable for. Then you have to move an elbow to the back of the stub end then delete the pipe then rightclick. Email this page download pdf download pdf printable page. Stub ends are mechanical joints that comprises of two components.
A pipe is usually welded to the stub end and the lap joint pipe flange is free to rotate around the stub end. Lap joint flanges are used with a corresponding stubend that inserts in the inside of the flange. When special facings such as tongue and groove, male and female, etc. Custom stub end flange pipe fitting united states fittings. The main benefit of this type of flange, is that once the pipe welds to the insert stubend, the flange then can rotate for easier alignment of the bolting holes. 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. China astm a860 mss sp 75 wphy 56 60 65 70 lap joint stub ends, find details about china lap joint stub ends, carbon steel lap joint stub ends from astm a860 mss sp 75 wphy 56 60 65 70 lap joint stub ends guangzhou kingmetal steel industry co. Od of barrel max and min dimensions in and mm are rounded. Lap joint flanges and stubend assemblies are typically used in situations where frequent dismantling is. Lap joint stub end detailed info for lap joint stub end. Dimensional tolerances are in millimeters unless otherwise indicated.
Maurice stewart, in surface production operations, 2016. 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. 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. Short stub end type a sch 10s welded for lapjoint flange stainless steel 304l 316l inox 304l 316l model. For example, i have the same flange in stainless steel, this is a stainless steel 304 flange. Stubend and lap joint flange spec setup autocad plant. This datasheet is for lap joint flanges that have a flat face connection. The stub end is welded to the pipe with the flange free fitting around the pipe. Blind flange lap joint flange orifice flange slipon flange socket weld flange threaded flange weld neck flange. The lap thickness on the stub end is greater than, or equal to, the nominal thickness of the pipe wall. White paper the benefits of plm built on the salesforce platform. This type of flange connection is particularly useful for large or hardtoadjust. The stub end is then butt welded to the pipe, and the flange ring can be rotated to align with the mating flange.
Their pressureholding ability is little, if any, better than that of slipon flanges and the fatigue life of the assembly is only onetenth that of welding neck 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. Lap joint stub end inch dimensions as per asme b16. These lengths and radius apply for schedule 40s or thinner stainless steel pipes. 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.
Stub end are offered in three different ways, type a, b and c. Normally, a lap joint flange and a lap joint stub end are mated together is an assembly system. This 14vb stub end is used to adapt an industrial pipe flange to sanitary butt weld in applications for the food, beverage, cosmetics, dairy and semiconductor industries. Custom stub end pipe fittings are the specialty of united states fittings. Bolting pressure is transmitted to the gasket from the flange against the back of the pipe lap to produce a seal. Lap joint flanges are used in conjunction with lap joint stub ends. We manufacture to your specifications in stainless steel or carbon steel with ends preps including beveled, squared, grooved, flanged and threaded. The radius is for the stub end, so you do like this and thats why its called a lap joint flange. Email this page download pdf download pdf printable. Ss81010080 please enter or update the user part number and a comment optional. The benefit of this is that there will not be any issues with bolt hole alignment. The lapjoint flange and stub end assembly are used mainly in piping systems that necessitate frequent dismantling for.
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