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