The basic flexible element of an expansion joint is the metal bellows, which is. The expansion tallies with that of the chosen compensator. The performance of expansion joint is mainly depends on the geometric features of bellow. Do not weld in the near vicinity of a nonshrouded expansion joint without protecting the expansion joint from damaging weld splatter. The plain bearings serve only for correct initiation of movement in the expansion joint.
Stress corrosion cracking scc caused by wet hydrogen sulfide was responsible for the failure. If an expansion joint is to be installed underground, or will be submerged in water, contact the manufacturer for speci. Metal bellows expansion joints offer a cost effective alternative to other expansion devices while optimizing the productive life of a piping system. Metal expansion joints installation instructions pdf. These motions are possible because of the ability of the convolution. This offers a costeffective option when dealing with very large diameter expansion joints and special designs. These bellows are made up of alloy 316 stainless steel and also stock alloys 304 and 321 with other special alloys available. Rubber expansion joints concentric reducer rubber expansion joint r series temperature pressure relationship temperature degrees fahrenheit pressure derating factors series s series t 170 1.
The pressure master expansion joint offers exceptional value as a method of absorbing long axial thermal expansion in pipelines and process systems. A bellows expansion joint is an assembly of two or more bellows which help to tackle expansion or contraction in the system. A new engineering tool which concisely and comprehensively clarifies the answers to the most common questions, issues and concerns in relation to expansion joints. Teflon expansion joints corrosion proof, nonaging with extraordinary flex life and unmatched reliability. Tie rods or limit rods stabilize the center pipe connection and. 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. Technimex rubber bellow expansion joints are the best solution to isolate vibration, dampen noise and pressure.
Metal expansion joints and metal bellows hose master. The reason behind the widespread usage of universal expansion joints is that unlike a lot of the other types, these can contain movements in all 3 directions namely lateral, axial, and angular. Jm is the only manufacturer to complement its membrane offering with a full line of specialty roofing products that include expansion joint covers, edge metal systems, roof vents and drains, and. Furthermore, an important suggestion should be made that the effect of environmental medium on fatigue life must be paid more attention to when dealing with fatigue analysis for bellows expansion joints. Highly flexible and able to absorb axial lateral angular movement. Download expansion joint brochures and catalogues belman as. The expansion joint shall be able to handle the axial, lateral, angular or rotational movements or a combination of one or more above, at all operating conditions.
Technimex rubber bellow expansion joints are the best solution to isolate vibration, dampen noise and pressure surges coming from for example engines, pumps andor turbines. Expansion joint bellows are capable of movement in an axial, angular or lateral direction. This inline pressure balanced expansion joint is designed for cases when anchoring to the piping system is not feasible or pressure loads are too high for equipment like. Pdf optimization and standardization of flanged and. Hence, type of raw material and its properties, its geometric features, other influencing design factors, construction or. 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. These factors should be fully evaluated by every person selecting and applying expansion joints for any application. Expansion joint replacement is also available if the current product has failed or needs to be replaced. Tie rods or limit rods stabilize the center pipe connection and distribute movement evenly between bellows. 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. Known for its high pressure capabilities, the toroidal or omega shape is unique in the industry.
Expansion joint bellows expansion bellows manufacturer from. Metallic expansion joint project standards and specifications page 3 of 9 rev. This expansion joint is unusual in its design in that it absorbs lateral, axial, and angular movement. Each inline pressure balanced expansion joint is designed for a specific pressure, temperature and axial compression rating. Also known as a double bellow expansion joints, these are made with 2 bellows that are connected by a spool or pipe section. Our expansion joints are known and trusted by clients the world over, with thousands of installations for clients like abb air preheater, samsung engineering, and general electric. We are offering expansion bellows to our client,which are used to absorb movement in piping caused by thermal changes. Metal bellows expansion joints for expansion and contraction. Metal bellows expansion joint provides perfect balance between value and performance. Rubber bellow expansion joint en technimex international bv. What is the difference between a bellows and an expansion. In contrast to fitting example 2, axial movement of the vertical pipe arm is disregarded.
Its end fittings include welding nipples, fixed flanges ot. Also known as a double bellow expansion joints, these are made with 2 bellows that are connected by a. You can also find technical information as a pdf download at. Expansion joint bellows our product range includes a wide range of expansion bellows, ss bellow for steam, ss bellow hose, ss expansion joint bellow, generator bellow and ss braided bellow. Expansion joint bellows expansion bellows manufacturer. This report describes the analysis carried out to investigate the causes of failure using fea package and analytical method. 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. Universal expansion joints universal joint bellows kp. When using flexicraft metal bellows expansion joints, you can be assured they were designed and built to last. Welcome to triad bellows stainless steel exhaust bellows data sheets page. Flexicraft industries flexible piping solutions expansion joints 19,935 views 15.
We use the following definitions but the terms bellows and expansion joint are typically considered as interchangeable. A universal type expansion joint is one which contains two bellows with a connecting pipe between them. Expansion joint bellow type metallic expansion joints are oldest and most efficient and functionally reliable compensator for all applications involving high temperature and pressure. Expansion joints and metal bellows badger industries. Pdf flanged and flued type expansion joint thick wall expansion bellow used as an integral part of many shell and tube heat exchanger where process. The addition of the rubber properties and nyloncord reinforcement provides a flexible pipe joint that is easy to. The expansion tallies with that of the chosen compensator the fixes points are dimensionned so that they can absorb the reaction forces and stiffness rate that arise during use. Stainless steel expansion joints low pressure and high pressure metal expansion joints are designed and manufactured in strict accordance with the expansion joint manufacturers association ejma latest 10th edition. Pdf failure of 304 stainless bellows expansion joint. As a founding member of the expansion joint manufacturers association ejma in 1955, badger continues to be an active in the development of expansion joint design technology.
Additionally, these expansion joints are suitable to compensate thermal elongation or even misalignments. Flange connection general stainless steel metal bellow. This product is designed for the chemical processing and. 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. Kaishu guan et al stated the failure of a bellow expansion joint of 304 stainless steel has been analysed. In addition to fabric and metal expansion joints, badger provides onsite services for inspection, repair, and replacement of expansion joints. Bellows expansion joint with hydroformed bellows for minimal residual stresses. No one can offer greater security or variety in meeting your needs for steam or any other applications. Specialty roofing products johns manville jm is a total roofing systems provider meeting the needs of the commercial and industrial roofing industry. Using customerprovided components from an expansion joint removed from service, hose master can replace bellows and often reuse preexisting pipe and fittings. Careful selection of the expansion joint design and material for a given application, as well as properly engineered installation are important factors in determining performance.
At triad bellows we believe that design integrity is key to building metal bellows expansion joints that will last. Technical committee tc342, as well as its national equivalent, which are responsible for issuing gas. Definition of the use of expansion joints bellows in piping. Review the metal expansion joint flexible coupling models below to choose the optimal design for your application, or contact our highly trained staff for assistance. Garlock expansion joints offer superior performance, reliability, and service life, resulting in improved plant safety and increased mechanical integrity of equipment. 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. Pdf optimization and standardization of flanged and flued. Use our different data sheets as references to see which bellows will meet your needs. Adsco offers everything from toroidals to low corr, high corr. High temperature kevlar rubber expansion jointpump connector.
As specifically engineered products that are inserted in a rigid piping system, garlock rubber expansion joints. View an instant pdf of the product of the week showcase book. When it comes to the design and manufacture of expansion joints, adsco is an industry leader recognized the world over for the quality and innovation of our products. 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. Low corrugated rubber bellows with reinforcing inserts and builtin packing profile for absorption of the swivel flanges. Design modifications are provided to ensure proper working of the expansion joint. The failure of a bellow expansion joint of 304 stainless steel has been analysed. They are commonly found between sections of buildings, bridges, sidewalks, railway tracks, piping systems, ships, and other structures. The most common fitting configurations are flanges or beveled weld ends. Torsion destabilizes an expansion joint reducing its ability to. Dec 29, 2018 flexicraft industries flexible piping solutions expansion joints 19,935 views 15. Consisting of flanged ends and a flexible section, much the same as a flanged metal bellows, the rubber expansion joint can absorb within its free length more. It is usually furnished with limit rods or full thrust tie rods, depending upon the service conditions.
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