This type of connection in a pipe flange allows for ease of disassembly and separation for repair and regular maintenance. It is used as a nozzle in the pressure vessel and heat exchanger. The hub, or neck, transfer the stresses to the pipe to reduce high stress concentrations. Weld neck flanges, weld neck flange manufacturer in china.
We are manufacturer, supplier and exporter of high quality weld neck flanges series ab. Our company provides these in all material grades, specifications and sizes. Long weld neck flanges feature a long tapered hub that goes gradually over to the wall thickness from a pipe. Weld neck pipe flanges with a hub have published specifications that range from 12 thru 96. Dimensions, sizes and specification of long welding neck flanges1. The typical length stocked is 9 and 12 and can be machined to shorter lengths with a quick turnaround. Weld neck flange,welcome to visit cangzhou hengjia pipeline co. For instance, there are long weld neck flange standard dimensions and long weld neck nozzle dimensions that vary to add. Ansi, mss, awwa, din, uni, jis, bs, sabs, en1092, gost, also we can produce according to customers drawings size. Browse raised face weld neck flanges din in the world wide metric, inc. A weld neck flange also known as a highhub flange and tapered hub flange is a type of flange.
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. The long type is unsuitable for pipes and is used in process plant. The lighter the pipe is the larger the bore is in the weld neck flange. 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. Home datasheets flange datasheets standard connection flange datasheets flange long weld neck, ansi class 150, asme b16. Long weld necks 150, 300, 400, 600, 900, 1500, 2500 56 studding. If you dont have sketchup installed on your computer download the amazing free sketchup here. Weight calculation of weld neck flanges piping components. These lengths depend on what the flange is needed for. Weld neck flanges series ab are highly durable, corrosion resistant and reliable. Weld neck flanges a b, stainless steel weld neck flanges a. Long weld neck flanges manufacturer mumbai india buy flanges. Pipe fittings free delivery possible on eligible purchases.
The bore of the weld neck flange matches the pipe bore. Point of weld a hub diameter x bore b number of holes diameter of holes bolt circle c approximate weight lbs 12 3. The extreme pressure that is developed in piping applications throughout the industry calls for highpressure resistance. Other than neck, all the dimensions are same as the regular flanges. Raised face weld neck flanges provide additional support with its long and tapered neck. Choose us, you can be get most careful and thoughtful service. Long weld neck flanges are often used as a nozzle for a barrel or column. The weld neck flanges are available in two designs. Industrial flange steel flange drawings texas flange.
As the name suggests, long neck flange has long neck than regular weld neck flange. The long weld neck flanges are developed using quality material with perfect finish. Welding neck flanges weld neck raised face flanges. The long neck guides the pipe into the flange itself and provides reinforcement that a standard weld neck. Lapjoint flanges with neck ring for welding type 34 en 10921. Flat face flanges may be provided at full thickness, c, or with raised face removed the latter is nonstandard. Long welding neck flanges can be made according to customers drawings. Dimensions, sizes and specification of long welding neck. Weld neck flange dimensions class 150 to class 2500.
Download copies of delivery notes, invoices and mtr mill test report, online. Most commonly used flanges are weld neck flange, slip on flange, blind flange, socket weld flange, threaded flange and lap joint flange rtj flange. Weldneck flanges or weldingneck flanges can be differentiated from all other types of flange by their long tapered hub. Datasheet stud bolt sizes for ansi flanges download. For instance, there are long weld neck flange standard dimensions and long weld neck nozzle dimensions that vary to add extra strength to pipes and mechanicals. Weld neck flanges are welded directly to the pipe at the neck of the flange.
Weld neck or welding neck flange dimensions, tolerances and required stud bolts, asme b16. Long welding neck flanges catalogue hydraulic and offshore. Long weld neck standard connection flanges texas flange. Solid is a china supplier of weld neck flange, we have a hightech work shop. D outside diameter of flange, b bore diameter of weld neck flange, t minimum thickness of flange, h length through hub of weld neck flange. However, a long neck flange has a slightly longer neck. In flanges we export forged flanges, weld neck flanges, slip on flanges, plate flanges, ring flanges, blind flanges, lap joint flanges, long weld neck flanges, socket weld flanges, threaded flanges. Weld neck flanges are often used for applications where high pressure is a factor. And conversely the heavier the pipe is the smaller the bore is in the weld neck flange. In pressure classes 150 and 300, the height of raised face is approximately 1. Point of weld a hub diameter x bore b number of holes diameter of. The flange neck has a beveled end that, when connected to a pipe, creates a trough for a strong weld. Html and pdf format that contain flange dimensions of the standard flanges we provide. Carbon steel flanges are available in sizes from 14 to 64 and are manufactured and quality controlled to meet asme, astm, bs and dinwerkstoffe standards.
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. Long weld neck flange manufacturing forged components. When connection of the piping parts together is needed, the importance of flanges reveals. Our carbon steel flanges are available in various formats such as slip on, blind, weldneck, socketweld, threaded, lap joint, orifice, spectacle blinds and long welded neck. The long weld neck flange is normally referred to as the high hub flange.
Weld neck flanges include a long tapered hub that aid in reinforcement and provide temperature pressure resistance. Weld neck flanges designed to be joined to a piping system by butt welding. Long weld neck flanges spectacle blind flanges flange wall thickness. Long weld neck flanges are similar to a standard weld neck flange but the a. A long weld neck flange has a barrel that provides proper clearance between the nut and neck. Long weld neck flanges are built in a variety of lengths. Stainless steel pipe nominal dimensions listed in the table are based on astm. Carbon steel, stainless steel and alloy steel process. Weights are based on manufacturers data and are approximate. Welding neck flanges weld neck raised face flanges latest. Dimensions sizes and dimensions of pipes and tubes, and their fittings inside and outside diameter, weight and more.
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. Weld neck flange advantages suitable for high pressure and high heat applications. The technical drawing,dimensional data sheet and weight list of long weld neck flange lwn 300lb according to asme b16. These flanges can also be manufactured with contoured bottoms. Benefits of using weld neck flanges weld neck flanges. Most common specification for carbon steel and stainless steel flange is. It is designed to transfer stresses to the pipe, thereby reducing high stress concentrations at the base of the flange. Raised face weld neck flanges din on world wide metric, inc. The typical drawing of weld neck flanges mathematical modeling for weight calculation of weld neck flanges.
Im having trouble finding a particular sizetype of flanges for downloading. Bolt circle diameters are 18 inch larger than bolt diameter. This flange is desirable for high pressure applications. Equal lwn barrels and heavy barrels are also popular. Weld neck flanges and stud bolts dimensions asme b16. Weld neck flanges or welding neck flanges can be differentiated from all other types of flange by their long tapered hub. This datasheet is for weld neck flanges that have a raised face connection. Provided that the required thickness shall be free from its influence. During dimensional inspection of flange, you should check for. The typical drawing is for weld neck flanges in accordance with asme b16. Weld neck flange dimensions are covered in asme b16. Long weld neck flange dimensions class 150 to class 2500.
The weld neck flange is designed to joint a piping system by butt welding. Long weld neck flanges we are pioneer in manufacturing, exporting and supplying a wide range of long weld neck flanges. Feel free to link to our datasheet with ansiasme studbolt sizes from your. Outside diameter 12 12 thickness q 1 716 raised face 116. The welding neck flanges is normally referred to as the high hub flange. The advantages to long weld neck flanges are the time savings and the elimination. The length of the flange can be increased if an offset attachment is needed on the heads or vessel shells. Dimensions d, b, t and h refer to the basic flange dimensions.
The long welding neck flanges proposed in our catalog are made from a selection of different carbon steels, low alloy, low temperature, high yield, alloy and stainless steel. The inside diameter of the flange is designed to match the pipes inside diameter. Weld neck flanges a b we are manufacturer, supplier and exporter of high quality weld neck flanges series ab. A weld neck flange consists of a circular fitting with a protruding rim around the circumference. It is a kind of flange used for closing ends of piping and vessels. Weld neck flanges a b, stainless steel weld neck flanges. A weld neck flange is drilled with the wall thickness of the flange having equal dimensions to the matching pipe. Weld neck flange is typically provided with a raised facerf, flat faceff, or ring type joint facertj. A long neck flange and a welding neck flange have similar features. You can also make your own knife by naming a group theknife. The long neck guides the pipe into the flange itself and provides reinforcement that a standard weld neck flange cannot. The weight calculation of weld neck flanges is based on the geometrical or mathematical modeling of the flange. Bored to match the inside diameter of the mating pipe or fitting, these flanges are directly welded to the end of the pipe.
Uses of long weld neck flanges forged components, inc. Texas flange provides asme and non code industrial pipe flanges for the. Some of the flange materials such as stainless steel are highly resistant to heat. The dimensions of the welding neck flange will almost always match the pipe it. Jun 29, 2015 the long welding neck flanges proposed in our catalog are made from a selection of different carbon steels, low alloy, low temperature, high yield, alloy and stainless steel. A weld neck flange is also termed as highhub flange or tapered hub flange. Long weld neck flange dimensions are covered in asme b16. Just fill in the form below and well email you a link to download out latest product catalog. Asmeansi b16 standards for pipes and fittings the asme b16 standards covers pipes and fittings in cast iron, cast bronze, wrought copper and steel. Long neck flanges are used by many industries because they are strong and resist.
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