After roof membrane is installed up to expansion joint opening, strike chalk lines on roof and wall as shown. Metal bellows expansion joint offers greater compression than the standard mc. They also simplified the model for easier analysis. 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. Garflex 8100 expansion joints feature rugged yet flexible nylon cord reinforcement in a molded spherical bellows design that ensures an exceptional burst pressure rating. View an instant pdf of the product of the week showcase book. This offers a costeffective option when dealing with very large diameter expansion joints and special designs. It is usually furnished with limit rods or full thrust tie rods, depending upon the service. Expansion joint and sealant cad details are provided here in quickview. Never install an expansion joint where its temperature or. Low corrugated rubber bellows with reinforcing inserts and. If you are too aggressive disassembling an old expansion joint, you could bend, dent or damage the pipe or vent. Devices used to restrict the range of movement of a bellows. When using flexicraft metal bellows expansion joints, you can be assured they were designed and built to last.
The construction varies, depending on the operating pressure and the required movements. Typical applications for metallic expansion joints include petrochemical plant, refineries, power stations, district heating installations, hvac systems etc and wherever piping systems or ducts are subjected to movement through the effects of temperature, pressure or external forces. A rubber bellow is manufactured from independent rubber layers and reinforcements that are vulcanized together after being molded or formed. Metal bellows expansion joints are often used to compensate for thermal expansion of hot piping systems. Using customerprovided components from an expansion joint removed from service, hose master can replace bellows and often reuse preexisting pipe and fittings. Flexible ml expansion loops provide long movements in all directions. Be sure you know the ratings of the expansion joint and of the piping system. A complete line of products, combined with our extensive experience, means our industrial customers find exactly. Technical committee tc342, as well as its national equivalent, which are responsible for issuing gas. Metal expansion joints and metal bellows hose master. Beyond the pipe and expansion joint, this is an opportunity to assess the construction of the system to see if additional support or structural. You can also find technical information as a pdf download. The teflon expansion joint has a widespread acceptance in the chemical processing industry, piping applications where acids and highly corrosive chemicals are being handled and commercial heating and air conditioning systems as pump connectors and a strategic point throughout a system.
For application to curbs style ej important sizing note. Definition of the use of expansion joints bellows in piping. Low corrugated rubber bellows with reinforcing inserts and builtin packing profile for absorption of the swivel flanges. They can be designed to exceed design temperatures of 2000f and pressures in excess of 300psi. Teflon expansion joints corrosion proof, nonaging with extraordinary flex life and unmatched reliability. Expansion joint an expansion joint is a complete unit with metal bellows or rubber. As a restrained expansion joint, the integral hingegimbal ring design on a gimbal expansion joint restrains the pressure thrust generated by pressurisation. An expansion joint bellow element employed in a piping system is an assembly of generally more than one convolute in series.
Kurbo metallic expansion joints are device containing one or more bellows. Dwf files where available are under specific product joint sizes. It is usually furnished with limit rods or full thrust tie rods, depending upon the service conditions. Use our different data sheets as references to see which bellows will meet your needs. Expansion joints installation and maintenance guide. The expansion joint covers shall be factory manufactured of 3ply, reinforced hypalon bellow with laminated closedcell foam backing. In externally pressurized pipe expansion joints, the bellows elements are arranged so that the media flow is on the external surface of the bellows. Welcome to triad bellows stainless steel exhaust bellows data sheets page.
Section flanged axial expansion joint 4 specification flexej flanged axial movement expansion joint with fixed carbon steel raised face flanges drilled to en10921 pn16, multiply stainless steel convoluted bellows. Tie rods or limit rods stabilize the center pipe connection and distribute movement evenly between bellows. Step 5 unroll coil of expansion joint cover out over roof foam side down against wall. Never install an expansion joint where its temperature or pressure ratings could be exceeded. Service life, reliability, and environmental safety highlight the advantages of garlocks oil and gas resistant elastomers. A universal type expansion joint is one which contains two bellows with a connecting pipe between them. The development of synthetic elastomers and fibers has enabled the product to be designed to handle pressures of 350 psi and temperatures of 400 deg fconditions that would have previously prohibited the use of nonmetallic materials. Types types of metallic expansion joints axial expansion. Remove any foreign materials that might inhibit movement of the joint. The following equations are based on this method but are for complete bellows not per convolution as described by the standards. Welded m etal bellows can be designed to compensate for axial compression and extension, lateral offset, and angular deflections. As a result, the precisionmade part wont fit and is a prime candidate for a leak. Garlock expansion joints are installed in marine engines, backup generators, and offshore loading around the world.
The development of synthetic elastomers and fibers has enabled the product to. Expansion joint assemblies, selection is based upon ability to provide flexibility in specific directions space requirements support requirements one good source of information is found in a practical guide to expansion joints by the expansion joint manufacturers association, inc. 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. The basic flexible element of an expansion joint is the metal bellows, which is.
The gimbal expansion joint is designed to allow angular rotation in any plane by using two pairs of hinges connected to a common central floating ring. Please provide as much detail as possible so we can provide you with accurate information. Expansion joints installation and maintenance guide world. In the 2007 version of tema the analysis was removed in place of a finite element method. Expansion joints and bellows are used in piping systems. Horizontal expansion joints behind other expansion joint covers, plates or fillers. Rubber expansion joints general description of rubber expansion joints expansion joints are used in appliances, machinery, apparatus and pipe systems where space is limited. Comflex metallic expansion joints engineering guide 2 to order or get further details, call your local contact shown on rear cover or listed at. Externally pressurized pipe expansion joints, also known as xflex expansion joints, are suited for piping systems that require large amounts of axial compression or extension. It is also possible to provide expansion joints with special accessories in order to fully exploit the advantages of the expansion joints for almost all applications. A typical bellows design over a range of diameters has 12 inches convoluted l length and is rated for 3 inches compression ec with zero lateral and angular movements. A bellows expansion joint is an assembly of two or more bellows which help to tackle expansion or contraction in the system. Expansion joint assemblies, selection is based upon ability to provide flexibility in specific directions space requirements support requirements one good source of information is found in a practical. Metal bellows expansion joints for expansion and contraction.
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. However, the tema method is so conservative, the expansion joint often fails the analysis. Please click the required files after receipt of your email we will send you the data or ask. No need for additional intumescent bellows noninvasive anchoring means no drilling or modification to the substrates ul 2079 tested and certified common applications. Range jord bellows designs and manufactures a full range of expansion joints, including single and double unrestrained joints, tied joints, hinged joints and gimbal joints. 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. The gimbal expansion joint is usually used in pairs of two or in combination with the hinged expansion joint. To absorb axial force a pipes fixed points must be robust. Furnish and install expansion joint covers as manufactured by portals plus inc.
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. They are made of accessories like flow liners, covers and tie rods. 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. We use the following definitions but the terms bellows and expansion joint are typically considered as interchangeable. Under pressure the expansion joint bellows produces a reaction. Dec 17, 2011 the elastomeric expansion joint compensates for misalignment and provides access to piping and equipment. We can provide these unusual constructions in virtually every configuration. The movement depends on the number of convolutions and on the length of the intermediate tube.
Many expansion joints are custom manufactured to diameters as large as 8 feet 2. Dont dont use chains or any other lifting device directly on the expansion joint, particularly for the bellows cover. Rubber expansion joints are normally used in piping systems under 200f, sometimes as pump or other equipment connectors. Bellows movement tech notes expansion joints, bellows. Rubber bellows with flanges and laterally movable restraints. Bellow shall be factory doublelocked to copper flanges.
Flexible specialty products can design and manufacture c ustom m etal bello w expansion joints based on your specific requirements, from 3 diameter to 120 diameter. The elastomeric expansion joint compensates for misalignment and provides access to piping and equipment. Pull flange next to wall up to chalk line on wall and. We also offer customdesigned metal bellows to meet your specific needs. No one can offer greater security or variety in meeting your needs for steam or any. Be sure to refer to the anchoring and guiding instructions. The streamlined flowing arch design reduces turbulence and allows smooth, quiet flowno need to fill the arch and restrict its movement. Comflex metallic expansion joints engineering guide. What is the need of expansion joints and bellows in piping. To provide flexibility in manual handling operations. Flexicraft industries expansion joints and all flexible. The 1998 edition of tema had an expansion joint analysis. The fea software was written by the paulin research group. Jord bellows can form from 50mm to 5000mm diameter at working pressures up to 4000 k pa.
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