Forged seamless long welding necks asme class 150 2500 dimensional data 56 robertjames sales, inc. Weld neck pipe flanges are typically provided with a raised face, flat face, or rtj facing. Specifying the schedule of pipe that it will be utilized for is of utmost importance when ordering. Bored to match the inside diameter of the mating pipe or fitting, these flanges are directly welded to the end of the pipe. Weld neck flanges are preferred for use in highstress applications.
Weld neck flanges or weldingneck flanges can be differentiated from all other types of flange by their long tapered hub. The materials such as carbon steel, stainless steel, and special alloys are used for production of flanges by modern forging, machining, finishing, testing and packaging machineries and facilities. This same style of flange helps balance the constant changes in pressure and temperature of liquids flowing in gasoline and chemical pipelines. Where standard weld neck flanges are used extensively for pipes, long weld neck flanges often abbreviated to lwn are used in high pressure and high or fluctuating temperature situations primarily in the oil and gas industry. Long weld neck flanges are ideal for high pressure applications and a key benefit of using them is that they do not interfere with the flow of fluid through the flange. The production of these flanges is more expensive because of the long necks that are present. The knife is a group you can rotate, change the size of, and even add or remove objects within example add a function curve for an advanced cut. And conversely the heavier the pipe is the smaller the bore is in the weld neck flange. The technical drawing,dimensional data sheet and weight list of long weld neck flange lwn 300lb according to asme b16.
Special flanges are not as common as regular flanges. A weld neck flange wnf is a flange type that is usually used with pipes, as opposed to pressure vessels. Weld neck pipe flanges with a hub have published specifications that range from 12 thru 96. Texas flange and continue reading flange dimensions weights. Ansi weld neck pipe flange 3d cad model library grabcad. Simplified called as lwn flange, the neck part seems like a elongated pipe and connected to a flange. Applications involving high pressure and the need for a hub that is long and tapered are what weld neck flanges are most often used for. Long weld neck flange manufacturing forged components. Welding neck flanges weld neck raised face flanges latest. Technical drawing of class 300 long weld neck flange. Slip on this is slipped over the pipe and then fillet welded.
The welding neck flanges is normally referred to as the high hub flange. Our range weld neck flanges, welding neck flanges are normally used for highpressure, cold or hot. All connections except lwns will be supplied to the nut stop ns diameter listed unless the nut relief nr diameter is requested. The information in these pages was compiled from industry sources which texas flange and fitting supply believes to be reliable. Weld neck flange dimensions are covered in asme b16. Flange weight calculator, wnrf flange weight calculator, stainless steel flange weight calculator, weld neck flange weight calculator, stainless steel flange weight chart, blind flange chart, large diameter flange weights, pipe flange weight chart, pipe flange weight chart, flange screw weight chart. In these two pressure classes, almost all suppliers of flanges, show in their catalog or brochure, the h and b dimensions including the raised face height. Lwn inside standard diameter in nps higher than 12 inch. This weld can be xray inspected for quality control.
Unlike a plain flange that is slipped over the pipe prior to being welded into place, a weld neck flange has a spoutlike neck that is beveled to match up to the pipe. Industry standard is to make to the slip on length through the hub. Each cad and any associated text, image or data is in no way sponsored by or affiliated with any company, organization or realworld item, product, or good it may purport to portray. These are circumferentially welded onto the system at their necks which means that the integrity of the buttwelded area can easily be examined by xray radiography. Kerkau can also quote lengths beyond 12 upon request. High pressure forged flanges industrial flanges forged. Long weld neck flanges are built in a variety of lengths according to need. Bore sizes listed are standard, smaller or larger bores available upon request.
Usually they are supplied with a flat face, raised face or rtj facing so if you need high quality long weld neck flanges then please get in touch. Norcal products manufactures a full line of flanges, fittings and adapters for vacuum applications. A weld neck flange is drilled with the wall thickness of the flange having equal dimensions to the matching pipe. Weights are based on manufacturers data and are approximate. Long welding neck 150 lbs nominal pipe size mm outside diam. Long weld neck flanges information supplier uk arc alloys. Long weld neck flanges include a long tapered hub that aid in reinforcement and provide temperature pressure resistance. Class 150 flanges nps 12 to 24 welding neck traceparts. They are used to serve some specific function within the piping system. Jan 08, 2014 the computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. The long neck guides the pipe into the flange itself and provides reinforcement that a standard weld neck flange cannot. Long weld neck standard connection flanges texas flange. Long weld neck flange dimensions class 150 to class 2500. With the largest distributor inventory in the country, we are sure to have what you need, when you need it.
Home datasheets flange datasheets standard connection flange datasheets flange long weld neck, ansi class 150, asme b16. Weld neck flanges are drilled machined with the wall thickness of the flange having the same dimensions of the matching pipe. Flange dimension charts for class 150, class 300, class 600, class 900, class 1500 and class 2500 free. Long weld neck standard connection flanges view detail. Mar 29, 2020 a weld neck flange is a type of pipe flange that incorporates a castin neck that is welded to the pipe. This is why many industries use this flange in areas that require minimum reinforcement. Classes 150, 300, 400, 600, 900, 1500, and 2500 long welding neck flanges click to view online download pdf file. The long neck guides the pipe into the flange itself and provides reinforcement that a standard weld neck. The bores of both pipe and flange match thus reducing turbulence and erosion.
The flange is beveled so it can be buttwelded to pipe, adding extra strength. Specialty flange and fitting products weld neck flange. The piping systems of high buildings are safer when reinforced with long weld neck steel flanges that relieve pressure in the pipes. In this article, i have tried to cover some of the special flanges such as orifice flange, long weld neck flange, reducing and expanding flanges and flangeolet that used in piping and equipment. Your exclusive source for long weld necks from metalfar, italy. Texas flange provides the following series of individual pages in html and pdf format that contain flange dimensions of the standard flanges we provide. Download class 150 flanges nps 12 to 24 welding neck. Weld neck flanges are often used for applications where high pressure is a factor. Home products flange special flanges long welding neck flange. Weld neck flanges are flanges that are designed to be integrated into piping systems by what industry welders describe as butt welds. Calculated flange weights in pounds class 150 nominal pipe size outside diameter inches slipon threaded socket weld weld neck blind lapjoint 12 3. The three most common types of facings that specialty flange and fitting, inc. The design of the flange allows for a full penetration weld at its base where it connects to the pipe.
It is designed to transfer stresses to the pipe, thereby reducing high stress concentrations at the base of the flange. Long weld neck formerly types 14, 7, and 8, with corresponding flange option. Our company provides these in all material grades, specifications and sizes. The long weld neck flange is normally referred to as the high hub flange. You can choose for a normal thickness long welding neck flange or a heavy lwn flange that with bigger thickness and a differently shape. During dimensional inspection of flange, you should check for. Note that even weld neck flanges are subject to restrictions with certain pipe schedules discussed later in the bulletin, that being said, in the most popular. Slip on flanges are only meant to be used with pipe.
The information in these pages was compiled from industry sources which texas flange and fitting supply believe to be reliable. Ansi weld neck pipe flange, design tabled and contains sizes fron 12 thru 24. Weld neck flanges have a long tapered hub and are often used for high pressure applications. Pipes provide better flows with this type of connection forging. When connection of the piping parts together is needed, the importance of flanges reveals. Weld neck flanges or welding neck flanges can be differentiated from all other types of flange by their long tapered hub. Ln flange with class 150, class 300, class 400, class 600, class 900, class 1500 and class 2500.
Long weld neck flange dimensions are covered in asme b16. The inside diameter of the flange is designed to match the pipes inside diameter. If you place the weld joint at the neck of the flange, the pipe is much easier to align and you can achieve a stronger weld. Slip on flanges will not work on long weld neck flanges. We offer nw kf, iso, cf, asa, wire seal and chain clamp style flanges and fittings to fit almost every application. Class 300 standard connections flanges texas flange.
A weld neck flange provides the optimal sealing surface for a spiral wound gasket, as the bore is close to that of the pipe. The lighter the pipe is, the larger the bore, conversely, the heavier the pipe, the small the bore. The length of the flange can be increased if an offset attachment is needed on the. Weld neck flange datasheets the weld neck flange, abbreviated as wnf, is a flange type that is usually used with pipes, as opposed to pressure vessels. Flat face flanges may be provided at full thickness, c, or with raised face removed the latter is nonstandard. A long weld neck flange has a barrel that provides proper clearance between the nut and neck. Lwn flanges have their own flanges integral with the neck that has the same bolt circle as all of the other ansi flanges. A long weld neck flange offers a lighter connection. North shore steel, your exclusive source for long weld neck flanges from metalfar, italy. To receive more information about long weld neck connection forging and more, please request a quote or call 281 4414088 to speak to a forged components representative that can answer all of your questions. Socket weld flange threaded flange weld neck flange. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users.
So in most cases it works as a nozzle for a column or a barrel. We manufacture long welding neck flange in india for export all around the world. Threaded, slipon and welding neck reducing flanges click to view online. Meeting service and quality demands since 1986 texas flange provides the following series of individual pages in html and pdf format that contain flange dimensions of the standard flanges we provide. The lighter the pipe is the larger the bore is in the weld neck flange. Weld neck flanges include a long tapered hub that aid in reinforcement and provide temperature pressure resistance. Long weld necks 150, 300, 400, 600, 900, 1500, 2500 56 studding. The typical length stocked is 9 and 12 and can be machined to shorter lengths with a quick turnaround.
Benefits of using weld neck flanges weld neck flanges. Standard weld fittings size elbows tees caps long radius 90. Uses of long weld neck flanges forged components, inc. Dimensions in inches of weld neck flanges and stud bolts. Available for solidworks, inventor, creo, catia, solid edge, autocad, revit and many more cad software but also as step, stl, iges, stl, dwg, dxf and more neutral cad formats.
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