In the oil field, the two most commonly used flange. The engineer or designer must choose among several flange options. Below are the types of flanges used in piping based on facing. Materials 5 materials for flanges flanges shall be. To ensure your always familiar with these, here are 6 of the most common flange types.
A flange pair is made up of two flanges and a gasket with bolts and nuts. With 2 flanges coupled together by a centering ring with a oring and a clamp fig. To ensure your always familiar with these, here are 6 of the most common flange types and a description of what they are best used for. S for design reasons, it is theoretically possible to combine different nominal diameters of union ends and. Gasket handbook 1st edition fluid sealing association. There are different types of pipe flanges used in the piping systems depending upon the fluid, pt rating, material of construction, connecting equipment etc. Pipe fittings dimensions are important and there are sizing standards to follow. A welding neck flange wnfeatures a long tapered hub that can be welded with a pipe. It is used where smooth bores free from pockets are desired. Slipon flanges this slipon flange is often chosen over welding neck flanges because of its lower. Pipe flanges are classified in different ways based on pipe attachment, pressuretemperature pt rating, facing, face finish. Flanges provide access for when equipment or piping needs to be cleaned, inspected or reconfigured. Materials 5 materials for flanges flanges shall be carbon steel forgings to the.
Flange connects the pipe with various equipment and valves. Here is a infographic depicting types of flanges for pipes used in process industry. Visit our website online now and gather all the information you require about the industrial pipe flanges and stainless steel pipe flanges. Pressure rating for pipe end thread tapered pipe threads npt or iso 71bspt allowable pressure ratings for male and female threads are. Pipe is welded to socket weld flanges by inserting the pipe into the socket and backing the piping out between 116 and 18. Used for low presure systems and where welding could be hazardous. Flanges and fittings types and classes free download as pdf.
There are many different types of fittings and they are the same in all sizes and schedules as the pipe. Pipes in various lengths for a range of joining methods. Class 1500 flanges were deleted due to a lack of interest in using large size flanges in that pressuretemperature rating. Hayward pipe distributes industrial and commercial flanges in all the materials listed below.
Api 6a specification for wellhead and christmas tree equipment. Slipon, in both ring and hub style, to fit over a pipe weld neck, machined to match a pipes inside diameter and attached via welding. The flange is then slipped over the stub end and bolted up. These flanges are welded on inside as well as outside to the pipe. Section 8 flanges zhengzhou huitong pipe fittings co. Welding neck flanges are easy to recognize at the long tapered hub, that goes gradually over to the wall thickness from a pipe or fitting. Understanding joints, connections and the most common flange types used in the oil and gas industry is a core requirement to keep these levels of safety and attitudes the same. As a result, the dimensions of the flanges are restrictively regulated.
These products are specially designed in such a way that the outer diameter of the pipe is slightly smaller than the diameter of the flanges. Pe industrial systems pipes, fittings, unions, flanges and flange adaptors. Pipe flanges and flanged fittings standards for engineers worldwide asme b16. These types of flanges are used in high pressure and temperature application. Gasketed joint application information nonstandard flanges. Section 4a api 6a type 6b, 6bx flanges and studded crosses and tees api flanges flanges and studded blocks are designed and manufactured in accordance with the following specifications. Weld neck flange are most widely used flanged in process piping. Ansi class flange types regardless of size or specification, flanges are fundamentally designed to close, cover, connect, or support pipe systems.
A flange can also be a plate or ring to form a rim at the end of a pipe when fastened to the pipe for example, a closet flange. Orifice flanges are widely used in conjunction with orifice meters for measuring the volumetric flow rate of liquids and gases through a pipe. A flange is an external or internal ridge, or rim lip, for strength, as the flange of an iron beam such as an ibeam or a tbeam. Operating instructions flanges according to din en asme. We know it is a kind of pipe fittings and is of several types. Compression joint threaded joint when pipes are joined by screwing in threads which are provided in the pipe, it is called a threaded joint. Two orifice flanges are called an orifice flange union. Blind flange manufacturer duwa piping can supply the blind flange in all sizes, materials and specifications strictly acc. These are used to combine, divert or reduce the flow of the water supply, and they. In order to meet our customer needs they come in different connection types and sizes.
The six common types of ansi class flanges, including. The long tapered hub provides an important reinforcement for use in several applications involving high pressure, subzero and or elevated temperatures. Long weld neck flanges are called by this name due to their longer neck as compared to standard flanges. Technical data handbook for butt weld pipe fittings. These flanges are bored to match the inside diameter of the mating pipe or fitting so there will be no restriction of product flow. The dimensions and weights of slipon flanges ansiasme are available on this page. Blind flanges, blind flange manufacturer in china duwa piping. Their static strength is equal to slip on flanges, but their fatigue strength 50% greater than doublewelded slip on flanges.
You will get a message about a change in pipe the flange dimensions, pipe cut length, plus any weld gaps add up to the overall dimension. Learn different types of pipe flanges used in piping. Types of pipe joints various types of pipe joints are as follows. We thanks to our skilled staff, we can produce a large number of en 10921 type 11 flange that comply with the different current standards. The standard nominal sizes dn of pipes to fittings are from 80 mm to 2000 mm. The types and uses of weld neck flanges forged components. Socket welding and threaded flanges are not recommended for service above 250c and below 45 c. Pvdf industrial pipe system 052004 pipes, fittings, valves simona 5 pp tank connections pe 80 ovoid duct pe 80 coextruded pipe relining pp swimming pool pipework in addition, we can offer you a special package of products and services for repairing leaking pipework systems. The 6 common types of flanges 2016 october 25 a flange is a collar or ring, usually holed for bolts, and welded or screwed at the end of the pipe or tube to allow objects to get attached to it. Classification of flanges based on pipe attachment 1. Dimensions and weights of carbon and alloy steel pipe welded. Get your stainless steel flanges today online or call us on 01953 857 158. It gives the highest level of joint integrity due to buttwelded with a pipe. These forged flanges are used to connect two pieces of pipe or valve onto a line.
These pipe flanges are used when the counter flanges are flat face. Aug 25, 2017 where steel pipe is threaded and used for steam service above 250 psi or for water service above 100 psi with water temperatures above 220 f, the pipe shall be seamless and have a thickness at least equal to schedule 80 of asme b36. This prevents turbulence at the joint and reduces erosion. Flanges imperial, metric, or ansi the flange or flange gasket is designed to fit between two sections of pipe that are flared in order to provide higher surface area.
Learn about types of flanges threaded,socketweld,slipon,lap joint,weld neck,blind flanges. You will earn the experience that will help you to fast pace your career and makes you confident in the workplace. Common types of flanges are highhub weld neck, lowhub slipon, lap joint. The bore of this flange is threaded to match the pipe size. The reason why it is bored to match is because it reduces the corrosion and turbulence that takes place inside of the pipe. A flange joint is a connection of pipes, where the connecting pieces. Api 605 flanges are designated series b flanges in asme b16. A flange joint is a connection of pipes, where the connecting pieces have flanges by which the parts are bolted together. Teekay products successfully combine strength with flexibility. Piping fittings of wrought carbon steel and alloy steel for. The flanges shall be manufactured according to the. It is slipped over the pipe and a stub end is welded onto the pipe. Socket weld flanges were initially developed for use on smallsize high pressure piping.
A closer look at 6 different types of flanges world wide. The socket weld flange, abbreviated as swf, is similar to a slipon flange, except only one fillet weld is made to the flange and pipe. This flange type is used, normally, in highpressure and highlow temperatures applications that require an unrestricted flow of the fluid conveyed by the piping system the bore of the flange matches with the bore of the pipe. This flange type will be welded to a pipe or fitting with a single full penetration, v weld butt weld. It must first be properly decontaminated and may require documentation. Below are the flanges based on the pipe attachments. The smooth transition from flange thickness to pipe or fitting wall thickness. Additional decisions involve facing and surface finishes, and the appropriate. The specifications in these supplementary instructions refer to flanges made of 316l.
The flange union kits are used to combine a male and a female flange within the same flange size code. Breakup flanges are added in the pipeline system if regular maintenance is required during plant operation. You will get a message about a change in pipe the flange dimensions, pipe cut length, plus any weld gaps add up. A flange is usually in the shape of a disc and is used to connect two tubes together or to connect a pipe to a valve, tee, choke or other component. Pppe plastic piping systems product range gf piping systems. Ansi flanges, which is a type of pipe flanges available in various materials. The types of flanges for piping explained projectmaterials. The only casing spacer to combine axial joint restraint thrust restraint. The connection with the pipe is done with 1 fillet weld, at the outside of the flange. Consolidation of materials and reduce the amount of sheets in. At the request of the american petroleum institute api, flange dimensions, in accordance with the api standard 605, were included in the subsequent drafts. Contact manufacturer before returning a used gasket. Lap joint flanges have all the same common dimensions as any other flange. These values are calculated using steel pipe outside diameter dimensions.
Providing support and strength, two flanges are typically attached to pipe ends with a gasket in between. A blind flange is a plate for covering or closing the end of a pipe. Pipe flanges come in different styles, pressure ratings, materials and sizes to meet the design requirements. Each flange comes with a pipe tap for measuring the pressure drop of the flow through an orifice. Pipe fittings pipe end thread information the end connections with the lower pressure rating is the determining factor of pressure rating for the fittings with both unilok tube ends and pipe thread ends. This flange is a solid circle drilled to match a companion flange. Gaskets for pipe flanges which includes spiral wound gaskets and nonmetallic.
The same is done again but to the back end of the flange hub which fuses it to the outside of the. Drawing api 6a flanges in acornpipe later, when the dimension is known, you can bring up the drawing, press ctrl the middle of the flange, and enter the correct dimension. For steel pipe flanges and orifice flanges project standards and specifications page 2 of 16 rev. Pipe restraints and adapter flanges emco waterworks. Flanges and fittings isokf flanges and fittings easy and reliable isokf flanges and fittings allow quick release and tight connections from 10 to 50 mm nominal diameters. The pipe flanges are the second most used joining method after welding. The flanges are created to match the pipes inside diameter or fitting.
F l a n g e d flanges class 125 cast iron size in part number a. Types of pipes comparison of financing alternatives. Industrial pipe flanges, industrial and stainless steel flanges. May, 20 remember that flanges come in a variety of shapes and sizes to suit different applications. They are produced in a variety of sizes, shapes and are categorized by their inside diameter and their outside diameter. Every pipe and fitting are strictly subjected to hydrostatic pressure tests of the relevant standards. A lateral is used in situations where it is necessary for the two flow streams to combine.
George fisher piping systems, sandvik materials technology, british metrics pipe flanges are protruding rims, edges, ribs, or collars used to make a connection between two pipes or between a pipe and any type of fitting or equipment component. They are made from 304l stainless or a weldable aluminum alloy. Industrial pipe flanges are available at stauff anglia today. These flanges are easy to use in fabricate applications as they are simply slipped over the pipe which needs to be connected and then a fillet weld is used to run around the end of the pipe to fuse the pipe to the inside of the bore of the flange.
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