Offered with flanges or butt weld ends from 3 to 48 nominal diameter for design pressures to 300 psig at 650f. The lowcycle fatigue life of bellows using elasticplastic anal ysis was predicted by hamada and tanka 11. Each expandoflash cover is a combination of a flexible rubber membrane, supported by a closed cell foam to form flexible bellows, with two metal. Triads dual metal expansion joints consist of two single bellows connected by center pipe. The technical calculations of flexocon engineers designs are. The figure below typifies good practice in the use of a single expansion joint to absorb axial movement.
Flexicraft provides a full range of metal bellows expansion joints designed for engine exhaust, including blowers, fans, diesel engine generators, marine exhaust. Low corrugated rubber bellows with reinforcing inserts and builtin packing profile for absorption of the swivel flanges. Joint opening plus curb widths must be considered for bellow. For applications where a thermal expansion of the piping has to be absorbed. If an expansion joint is to be installed underground, or will be submerged in water, contact the manufacturer for speci. Lateral expansion joints can move in all lateral directions simultaneously for absorbing expansion from two pipe sections in different directions.
Macoga expansion joints for crude storage tanks in the north of england 07. Designer and manufacturer of expansion joints belman as. Addition for friction force from guides between two. It consists of an extruded rubber bellows, vulcanized to two 80x80x9. The stainless steel bellows should be made to avoid lateral movements by providing directional main anchors at ends two direction supports acting at right angles to the axis of the pipe to direct the piping growth in to this joint. The gimbal expansion joint is usually used in pairs of two or in combination with the hinged expansion joint. These joints also absorb vibrations due to flow of gases. Universal expansion joint assemblies consist of two bellows connected by a center spool piece wth. Tie rods or limit rods stabilize the center pipe connection and distribute movement evenly between bellows. Definition of the use of expansion joints bellows in piping. Bellows of special expansion joints are designed according to ejma code. Metal expansion joints can be used in a variety of applications and will range in temperature demand, pressure, and size. The amount of deflection is based on the amount of angulation each bellows can take and the length of the center spool. With this you can effectively find technical data and select the expansion joint needed for your project.
Metal bellows expansion joints offer a cost effective alternative to other expansion devices while optimizing the productive life of a piping system. The basic constituent element of expansion joint, bellows, can be specified, considering on movement, pressure, temperature, service life and corrosion rate required. With the addition of tie rods this metal bellows expansion joint. Bellows expansion joints comprise of a bellow, end fittings, control rods, liners, and. It is always important to have one axial expansion joint between two. The term bellows is used by extension for a number of applications that do not involve air transfer. This offers a costeffective option when dealing with very large diameter expansion joints and special designs. All the two ply metal bellows manufactured in bsi are in accordance with the expansion joint manufacturers association ejma guidelines latest edition. Bolts should be installed from the bellows side so that the bolt heads are adjacent to the bellows to insure that the bolts do not. Metal expansion joints engineering, manufacturing and sales. Tied universal expansion joints are constructed with two stainless steel bellows of an equal length separated by a center pipe just like a standard universal joint.
Other terms used compensator, flexible connector rubber bellows the flexible element within a rubber expansion joint. The first invention, a metal hose which was developed and patented in 1885, was followed by a patent for the metal expansion joint. High expansion compensation, low adjusting forces, soft corner. Ejma was founded in 1955 to establish and maintain quality design and manufacturing standards. In line pressure balanced expansion joint two ply monitored bellows design temperature. Flange connection general stainless steel metal bellow. It consists of two metal bellows with an intermediate pipe and connectors on both sides. Sleeve of the expansion joint is failing and because of these failures, bellows. These joints generally have two bellows linked with a center pipe and fitted with the tie rods. Flange connection general stainless steel metal bellow expansion joint is the most common and popular, it is mainly used in pipe. The convolutes are designed strong enough to withstand the internal pressure of the system, at the same time the typical contour of the convolute assembly allow sit to flex under thermal movement of the connected piping. It is usually furnished with limit rods or full thrust tie rods, depending upon the service conditions. Bellows company team outside the houston, tx facility. It can only absorb axial movement and must always be installed between two fixed points.
This is what happens, shell moves independently of the tubes. Note that the expansion joint is placed between two main anchors and that it is located near one of the anchors. Senior flexonics pathway produces round and rectangular metal expansion joints in all types of hardware configurations from 2. Expansion joint products 5 dual expansion joints a dual expansion joint can be used to gain larger axial movement than that of a single piping expansion joint can handle. An expansion joint is a specially engineered product inserted in a rigid. B6 guardian 306 ezflo garlock guardian 306 ezflo spooltype expansion joints feature an fep lining that is fused to the body of the expansion joint.
Its designed that end pipe and flange are welded at the both edge of bellows. Use our different data sheets as references to see which bellows will meet your needs. Angular expansion joints designed to allow only angular movements. Extreme care must be exercised while inspecting any pressurized system or component. What is the difference between a bellows and an expansion. This paper is concerned with the analysis of this phenomenon for the universal expansion joint which incorporates. The cost of downtime of a critical expansion joint far exceeds the cost of a spare unit placed and protected in reserve onsite. Metal expansion joints and metal bellows hose master. Hvac expansion joints compensators and flexible connectors normal corr. Metal expansion joints installation instructions keflex 1425 lake avenue woodstock, il 60098. A universal type expansion joint is one which contains two bellows with a connecting pipe between them.
Our expansion joints are designed to last as long as the system. Flange connection general stainless steel metal bellow expansion joint. This expansion joint is the simplest one available and comes with one bellows section and end connections. What are expansion joints an expansion joint or movement joint is an assembly designed to safely absorb the heat induced expansion and contraction of construction materials, to absorb vibration, to hold parts together, or to allow movement due to ground settlement or earthquakes. Normal metallic expansion joint, when used for a long period of time in an environment transporting gases and liquids of high pressure and temperature can cause cracks, leakages, deformations, and eventual failure of the pipelines. To prevent this from happening, bellows are used in the system, thereby being termed as bellow expansion joints. Universal expansion joint this expansion joint has two bellows sections connected by a center pipe section. Welcome to triad bellows stainless steel exhaust bellows data sheets page. An expansion joint or movement joint is an assembly designed to hold parts together while safely absorbing temperatureinduced expansion and contraction of building materials, and vibration, or to allow movement due to ground settlement or seismic activity. Failure of the duct is been observed in expansion joints. Universal metal bellows expansion joints are constructed with two metal bellows of an equal length separated by a center pipe. Lateral expansion joints designed to absorb lateral deflection. For this reason axial expansion joints should be installed coaxially with the piping.
Dual center anchor base configurations series 1500 laminated bellows expansion joints are. Single tied metallic expansion joints with twoply alloy bellows. 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. A single joint can also be used to absorb angular and lateral movements, as well as a combination of these 3 basic movements. Two hinges angular expansion joints or alternatively one lateral expansion. There two types of expansion joint, first the thin joint. Rubber expansion joints hks hks rubber expansion joints are available in different models universal, lateral and angular expansion joints, rubber bellows qualities depending on medium and the bellows design depending on pressure and temperature. Universal expansion joints are mainly used to absorb any combination of the. For an expansion joint to absorb the axial or lateral movements expansion or compression of a pipe, it must be arranged between two fixed points. Stress corrosion cracking scc caused by wet hydrogen sulfide was responsible for the failure. Expansion joint an expansion joint is a complete unit with metal bellows or rubber bellows and end fittings, plus, optionally, liner, cover and external hardware. Immediately after placing the system in operation, a visual inspection shall be conducted to insure that the thermal expansion is being absorbed by the pipe expansion joints.
This type of expansion joint is basically meant for axial movements only. As a special form of the axial expansion joint, the universal expansion joint has only a limited pressure resistance for stability reasons and, moreover, loads the adjacent pipe supports with the axial compressive force resulting from the internal pressure. Arrangement of pipe joint expansion joints in three joint systems for compenfitting example 7 eb 7 expansion joints with tie rods should expansion joints for pump connection withwithout tie rods for absorbing vibrations. This product is designed for the chemical processing and. The expansion joints must also not be exposed to high externally radiated or accumulated heat. What is the need of expansion joints and bellows in piping. Sealing problems and large space requirements of other expansion devices are eliminated with bellows expansion joints. Suited for combined and multiple types of movements. Stainless steel expansion joint, type rfas applications a stainless steel expansion joint with carbon steel flanges for the use in thermal oil pipe systems. Lateral deflection the relative displacement of the two ends of an expansion joint. Nystroms roof bellows system is an effective, flexible joint closure for a wide variety of standard and special applications.
Pipe supports for pipe loop expansion joint stronger fix points. The tefbellows is an expansion joint that combines the properties of metal and ptfe into the most advanced expansion joint available for highly corrosive piping systems. You can also find technical information as a pdf download. Metal bellows expansion joints for expansion and contraction. Tied metal expansion joints retain pressure thrust developed by internal pressure, through the use of hardware. Pdf failure of 304 stainless bellows expansion joint. Bellow expansion joints is one of the best expansion joints manufacturer offers metal bellows, metallic expansion joints, bellow couplings, valve bellows. This type of expansion joint requires the most control of the adjacent piping in regards to anchors and guiding.
Bellow expansion joints manufacturer metal bellows kp. The axial expansion joint consists of bellows with flanged or welded terminals. Transportation of foodstuffs, potable water distribution. The failure of a bellow expansion joint of 304 stainless steel has been analysed. For an expansion joint to absorb the axial or lateral movements expansion or compression of a pipe, it must be arranged between two. Each expandoflash cover is a combination of a flexible rubber membrane, supported by a closed cell foam to form flexible bellows, with two. The hinged expansion joint consists of bellows that are allowed to move at an angle by two. Now we can see the benefit of the expansion joint, then the expansion joint is installed. Hvac expansion joints compensators and flexible connectors.
In order to locate ourselves close to the customers, ayvaz. Universal rubber expansion joints lateral rubber expansion joint design. Macoga expansion joints for 2 biomass power plants in the british columbia, canada 09. Using customerprovided components from an expansion joint removed from service, hose master can replace bellows and often reuse preexisting pipe and fittings. However, stresses are induced in the expansion joint. An expansion joint bellow element employed in a piping system is an assembly of generally more than one convolute in series.
This expansion joint design will accept large amounts of lateral offset in multiple planes. A universal expansion joint is an assembly containing two bellows connected by a centre pipe and equipped with tie rods. Bellows are widely used in industrial and mechanical applications such as rod. All units meet the standards of the expansion joint manufacturers association ejma and military specification mile178. If a bellows expansion joint is located in a space with no access, then the shell wall must be cut open, which results in laborintensive and. Universal expansion joint this expansion joint has two bellows. This expansion joint consists of two bellows connected by a center spool piece with flange or pipe ends. Designed to cover the mid temperature and pressure range for general process equipment. Most bellows expansion joints have a life span of 1011 years. Oakridge bellows metal expansion joints 9,236 views. Brba, brbc, brbg, brbs and brbwc exterior roof bellows expansion joint systems, surface mount, membrane options, closed cell support foam. Apr, 2016 there are two sets of hinges linked with a floating ring that is responsible for absorbing the pressure of the expansion joint assembly.
Metal bellows expansion joints offer a cost effective alternative to other expansion. The basic flexible element of an expansion joint is the metal bellows, which is flexible on all planes. The failure of bel lows expansion joint of 304 stainless steel was analyzed by guan. If you are unsure of what kind of bellows design is right for you contact our engineers today and we will provide you with the right bellows for your application. Expansion joints with 2 ply testable and monitored bellows for north european refinery 08. Expansion joint bellows are capable of movement in an axial, angular or lateral. Universal expansion joints are mainly used to absorb any combination of the three basic movements in the piping system. All the two ply metal bellows manufactured in bsi are in accordance with the expansion joint. Universal tied, aut metal expansion joints contain two bellows separated by a pipe spool and tie rods designed to contain the pressure thrust force. Immediately after placing the system in operation, a visual inspection shall be conducted to insure that the thermal expansion is being absorbed by the pipe expansion joints in the manner for which they were designed. Delivery of two fccu expansion joints for a european refinery 06. Expansion joint type 39 type 39 type 39 is a handbuilt low corrugated rubber comflex expansion joint and can therefore be customised to fit in any existing gap by virtue of its variable overall length. For application to curbs style ej important sizing note. Fabric expansion joint catalog inko engineering supplies pte ltd.
Anchor base expansion joint can be installed which incorporates two joints and an intermediate anchor. We are recognized as the lead innovator for high temperature industrial expansion joint. Performance testing of bellows bellows are correlated with actual. Once you have determined the part that best matches your requirements, we will be able to see if a standard or custom design would be the most beneficial for your situation.
Normal corr expansion joints employ a standardized bellows design ideally suited for general industrial applications. Expansion joints absorb variations of ducts caused by thermal expansion and contraction. Metal expansion joints installation instructions pdf. Sleeve of the expansion joint is failing and because of these failures, bellows directly exposed to hot gases also. Tied custom metal expansion joints for general pressure applications. This offers a costeffective option when dealing with very large diameter expansion joints. Inspection of metal bellows expansion joint piping systems duration. Universal expansion joints without tie rods for absorbing axial, lateral and angular movements.
Bellows expansion joints because the bellows expansion joint is required to absorb thermal andor mechanical movements, the bellows element must be constructed of a relatively. Expansion joint specifically designed for highway use within structures creating longitudinal movements of 15 mm, vertical movements up to 10mm. Buckling of double bellows expansion joints under internal pressure by d. Witzenmann, the inventor of the metal hose and founder of the metal hose and expansion joint industry is the top name in this area. Newland corrugated bellows expansion joints may buckle under internal pressure in the same way as an elastic strut may buckle under an axial load. This expansion joint as with the single metal bellows expansion joints. Expansion joints technical manual draco mechanical supply. Two 24 diameter fabric expansion joints for an oil refinery. The universal arrangement allows greater axial, lateral. The expansion joint manufacturers association, inc. The eej cover is 60mil thick, reinforced epdm bellows widely used in roof to roof and roof to wall cant applications. Hinged expansion joint this expansion joint has a single bellows section and is designed. They are mainly required to absorb any of the three general.
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