Pipes trademark for pipe with a pushon type connection. Box 5800, ms0501 sandia national laboratories albuquerque, nm 87185 abstract this document provides general guidance for the design and analysis of bolted joint connections. The type of flange to be used for a piping application depends, mainly, on the required strength for the flanged joint. To facilitate the finite element analysis of a flanged joint, a parametricdriven program was developed to aid the engineer in investigating flanged joints within the time and expense parameters associated with the. Deflection is not recommended for flange joint due to the rigidity of the joint. Performance of bolted flange joints is mostly discussed. Expandoflash expansion joint covers are flexible, weatherproof exterior covers for expansion joint openings and are an effective, flexible. Simplicity, sturdiness and watertightness are built into the system by design. Flange connection general stainless steel metal bellow. Rs6016 818 replaces 217 features and components expandoflash expansion joint covers are flexible, weatherproof exterior covers for expansion joint openings and are an effective, flexible closure for a wide variety of standard and special applications. Guidelines for pressure boundary bolted flange joint assembly asme pcc12010. Flange connection general stainless steel metal bellow expansion joint is the most common and popular, it is mainly used in pipe connection, aborb the extension and compression of pipe, according to different working situation, usually we recommend different structure, but for most common, we recommend general stainless. Triad bellows stocks a wide variety of flanges for low pressure, high pressure and engine exhaust applications.
The lap joint is a type of flanged joint as well as a type of facing. Expandoflash expansion joint covers are flexible, weatherproof exterior covers for expansion joint openings and are an effective, flexible closure for a wide variety of standard and special applications. Flange joint synonyms, flange joint pronunciation, flange joint translation, english dictionary definition of flange joint. Joint strength of gasketed bolted pipe flange joint under combined. The other main kind of seal for flanged joints is the ring seal, also known as a lens or ring type joint rtj. Pdf structurally sound bolted joints often fail due to loss of tightness.
Telescoping, or sliding, center shafts are available as standard, or fixed length shafts can be supplied. Bolted flanged joints ies integrity engineering solutions. Performance of a flange joint using different gaskets under. Flanged joint article about flanged joint by the free. Flange joints consist of a pair of identical discs with a row of attachment holes close to their outer circumference. Convincing proof of its worldwide acceptance is shown by the fact that more than 95% of the pipe now sold by u. The current philosophy for inspection of flanged joints is the periodic breaking of the joint and visual inspection of the sealing faces of the joints. Polyethylene flange adapters, metal lapjoint flanges, and bolt set.
When two pipes are to be joined, the two discs are placed against each other in such a way that the holes line up. The first step towards a correct function of a flanged joint is a sufficient seating of the gasket during assembly, presumed that the choice of the gasket is appropriate for the joint including demands, design and loads. Flange management joint integrity software boltprep. Flanged joint although the flanged joints first recorded application was more than 550 years ago, improved joints of this type are still used for many aboveground plant installations and other specialized applications figure 4. Localized hdpe pipe beambending at a flanged joint due to soil settlement, water buoyancy or wave action, pipe snaking above ground, etc, must be managed so as to isolate the flange from beambending strain. The seminar will highlight some of the new methods and practices associated with the. The metal ljf lapjoint flange is elastically flexed bent by the boltload to maintain the preload and to transfer the load to the hdpe flange face. Couplings, flange adaptors, repair collars and dismantling joints. Awwa class d ring flange, compatible with ansi class 125 and 150 bolt circles. In order to join thinwalled, in particular rolled tubes 1, a flanged section 2 is used that has a first web 3 insertable in the end of the tube 1 and a second web 6 vertically perpendicular to the first.
The flanged joint design means that pipes are secured by external screws, providing additional joint support for the transportation of substances at high pressure. Flanged universals are also commonly known as yoke. New methods and practices improving the world through engineering photo courtesy of hydratight. The key element to an effective sealing hdpe flanged joint, is to torque the bolts to a sufficiently high value to stretch the bolts, so that the ljf is flexurally distorted, and the hdpe flangeface sufficiently and continuously compressed. With rubber annular ring flange gasket, 2 24 flanged fittings can be rated at 350 psi. Pdf joint strength of gasketed bolted pipe flange joint. Flange connection general stainless steel metal bellow expansion joint is the most common and popular, it is mainly used in pipe connection, aborb the extension and compression of pipe, according to different working. Available as standard from a105 carbon steel or 316l stainless steel, it is possible to redrill to match other flanges standards. The fact that the majority of flanged joint leakage occurs at. Apr 06, 2020 the flange joint allows for quick and effective connecting of pipe sections and for joining sections of piping to ancillary equipment such as pumps, valves, and metering devices. Integritypro joint monitoring software is a bespoke database system specifically developed to plan, monitor, control and provide traceability of flanged joints and connections.
Article information, pdf download for design of bolted, flanged joints of pressure. Joint strength of gasketed bolted pipe flange joint under combined internal pressure plus axial load with different industrial and asme boltup strategy. The aim of this paper, therefore, is to develop an appropriate 3d modeling of a flanged pipe joint and to investigate its behavior under appropriate geometric dimensions so as to ensure practical applicability. Precision engineered flanges ring joint flanges class 150 facing dimensions. Gaskets american toruseal gaskets are recommended for awwa standard flanged joints in normal water and sewage service. Flanged joint analysis using parametrically controlled finite element approach charles s. Identify which style flange you may need to fit your metal bellows or expansion joints by using our flange specifications chart below. Localized hdpe pipe beambending at a flanged joint due to soil settlement, water buoyancy or wave action, pipe snaking above ground, etc, must be managed so as to isolate the. Flange joint definition of flange joint by the free dictionary. Lets now dive in, showing the key types of flanges with pictures. Bolted joints bolt load and tightening torque when using bolts to fasten the sealing joint the bolts must be of suitable strength and quantity to compress the seal and withstand the maximum hydrostatic load. Following the acceptance of ringjoints for flanges and valves by api and the issuance of their standard, asa b16e on steel pipe flanges and flanged fittings was revised to include them, and the 1939 edition included standard dimensions for a full line of ringjoint flanges based on the api. Joints for fittings, flanged pipes and valves made of.
A flangebolted joint is one of the basic nodes of the pipeline system. The joint is at equilibrium, with the compressive sealing. It serves to hold the pipe in place, give it strength. Tyton joint pipe is available in sizes 3 through 64. Very few people in the world truly understand the complexities of the bolted joint and even fewer can provide practical guidance on how to eliminate joint leakage. Contact stress distributions on the fuji film in case of joint gasketed with.
Sigmgp3 sigma 3 in gasket, 58 in x 3 in bolt rubber mechanical. Following the acceptance of ringjoints for flanges and valves by api and the issuance of their standard, asa b16e on steel pipe flanges and flanged fittings was revised to include them, and the 1939 edition included standard dimensions for a full line of ring joint flanges based on the api. The disassembling of flange joints is both time consuming and involves the shut down and deinventorying of the system. This seating or predeformation of the gasket determines the.
A flange joint is a nonpermanent, removable method of joining or blanking off steel and plastic pipes. Flanged pipe is rated for a maximum working pressure of at least 250 psi. This database system interacts with the toolpro controlled bolting software calculation engine, runs on the. The flexlok joint gasket recess in the socket is designed and manufactured to. Brown, charles morrow, samuel durbin, and allen baca p. Brown, charles morrow, samuel durbin, and allen baca prepared by sandia national laboratories albuquerque, new mexico 87185 and livermore, california 94550 sandia is a multiprogram laboratory operated by sandia corporation. Flange designs are available as weld neck, slipon, lap joint, socket weld, threaded, and also blind.
Kopflex brand flanged universal joints are available in sizes from 58mm to 620mm swing 2. Metal to metal contact mmc bolted flange joint, which appears between gasket centering ring and flange facing, is widely used in nuclear and petrochemical. Pdf joint strength of gasketed bolted pipe flange joint under. Pipe flange joint, assembly process, torque control, elastic interaction, tightening sequence, finite element analysis.
Creep behavior of metaltometal contact bolted flanged joint. Bolt torque for polyethylene flanged joints lapjoint. The rigid flanged joint cannot shed stress by ring deformation. Most anomalies that arise during the service life of a flange joint are rarely due to erroneous design. A ductile iron flange body provides the flange connection and includes an oring gasket that seals with the. Previous flanged joint alignment guidelines were primarily obtained from fabrication specifications such as asme b31. The underground use of the flanged joint is generally not recommended due to the rigidity of the joint and as noted in appendices of appropriate ansiawwa standards. Joint materials joint materials are normally furnished for all mechanical joint bell openings on pipe or fittings. The torqued bolts are elastically stretched to initiate the sealing preload. These stresses imply that parts of the joint assembly yield plastically. With the exception of american toruseal gaskets specifically recommended for superior performance, flanged joint materials are not normally furnished by american, although they are generally available from stock. Flexlok joint is cast of ductile iron and is accurately machined to accommodate the ball of the adjoining pipe.
Pipe may be furnished with one end flanged and the other with virtually any american joint as may be required. Performance of a bolted flange joint is characterized mainly by its strength and sealing capability. Each expandoflash cover is a combination of a flexible rubber membrane. In this step, external and internal leakage channels are closed. Flange connection general stainless steel metal bellow expansion joint.
The ljf assembly is typically evaluated as a combined mechanical spring assembly. This series of guiding principles align, meet or exceed joint integrity management practices detailed in current u. Fittings, flanged pipes and valves made of ductile. Used to join two pipes or tube spigot ends, pam flange adaptor for ductile iron pipes are available in different sizes. Design of bolted, flanged joints of pressure vessels g. If lap joint flanges are considered for an application then the type and nature of the seal must also be considered. The pipe joint comprises a flanged fitting 14 threaded onto pipe 12, a flanged fitting 16 welded onto pipe, and bolttype fastening means including bolts 17 and nuts 18 for pulling flanged fittings 14 and 16 clampingly together and squeezing sealing gasket 19 therebetween to provide a tight flanged pipe joint. The vci supports the worldwide responsible care initiative. Joint restraint products provides flexibility to accommodate pipe misalignment starflange series 3200 is a restrained adapter flange coupling device designed to connect plain end ductile iron pipe to a flanged pipe, valve or fitting. Expansion joint cover flexible, weatherproof joint opening covers. In this type of joint, both the hollow cylindrical pipes have a projected circular ring flared rim on their ends, which is known as flange.
Design and analysis of the flangebolted joint with respect to. This is because the clamping load is affected by the application of the. As expansion joints move, the greatest stress occurs in the cover at. It discusses new standards and the best practices available for companies needing to standardize their joint integrity management systems, or for those who need to implement a joint integrity management process from the ground up. The flange faces are also made to standardized dimensions and are typically flat face, raised face, tongue and groove, or ring joint styles, although other obscure styles are possible. Flanges are used, alternatively to welded connections, to facilitate maintenance operations a flanged joint can be dismantled quickly and conveniently. Pdf guidelines for pressure boundary bolted flange joint. Guideline for bolted flanged joint assembly in process. The lap joint uses a separate flange to carry the bolting and apply the axial load. The first web 3 has a bead 4 that projects into the inside of the tube.
Flangedjoint ductile iron pipe is manufactured in accordance with ansiawwa c115a21. Pressure vessel and piping bolted flanged joints are one of the most complex items of equipment to analyse at any plant. The wide range of types also means that there is a flange joint suitable for most transported mediums. Flange joint definition of flange joint by the free. Pdf gasketed bolted flange joints are used in process industry for connecting pressure vessels and pipes. Bolt torque for polyethylene flanged joints lapjoint style flange assembly based on asme b16. Bolt torque for polyethylene flanged joints tn38july 2011 lapjoint style flange assembly. Mar 27, 2017 in this type of joint, both the hollow cylindrical pipes have a projected circular ring flared rim on their ends, which is known as flange.
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