Type of expansion joint advantages disadvantages bellows ejma expansion joint manufacturers association no packing leaks inexpensive custom fabrications can be done quickly high temperatures. I have few queries regarding fabric expansion joints. Ejma 10th edition the latest revision free download as word doc. The ejma standards are used worldwide as a reference for the proper. Metallic expansion joint project standards and specifications page 3 of 9 rev. Ejmathe expansion joint manufacturers association, inc. Ejma 10th edition changes and engineering data steel bending. This will insure that the expansion joints will have a long life. The orf compression seal expansion joint system is used for small movement expansion joints, in deck of parkings, precasted structures and other types of concrete structures. The expansion joint manufacturers association is an organization of a metal bellows expansion joint manufacturers. Contractor or maintenance crews can be easily trained to install x. Ejma standard of the expansion joint manufacturers association. To do this the torsional stiffness of bellows needs to be worked out.
The area of the hydraulic cylinder would be the effective area of the bellows. A practical guide to expansion joints cern document server. Covers deformed high yield steel bars in grade 460 only and gives weldability requirements. What is the abbreviation for expansion joints manufacturers association. Purchase of standards includes a free practical guide with each book. The pipe size is 1900mm and the client doesnt want any load on the equipment.
S2 is the stress which runs circumferentially around the bellows due to the pressure difference between the inside. For a 20, 150 psig catalog standard expansion joint. Custom expansion joint manufacturer american expansion. Designed and manufactured as per ejma std 9th edition.
All units meet the standards of the expansion joint manufacturers association ejma and. These standards combine the knowledge and experience of the associations technical committee and are available to assist users, designers, and others in the. Bellow units of expansion joins are produced from stainless steel of thickness 0,1 to 0,3 mm according to ejma expansion joint manufacturers association standards. On torsional stiffness and natural frequency of bellows. Receive a free copy of a practical guide to expansion joints with each printed copy of the tenth edition, you will receive ejma s practical guide to expansion joints, a pocket size primer based on ejma standards. We have worked very closely with the licensor for many years to develop the. Ejma abbreviation stands for expansion joints manufacturers association.
Covers deformed high yield steel bars in grade 460. Emseal 2020 expansion joint and sealant product catalog request. Teflon expansion joints corrosion proof, nonaging with extraordinary flex life and unmatched reliability. We have worked very closely with the licensor for many years to develop the designs and implement improvements to prolong the life of the expansion joints in this. Pdf failure of 304 stainless bellows expansion joint. In addition to fabric and metal expansion joints, badger provides onsite services for inspection, repair, and replacement of expansion joints. Rm applied engineers provides custom manufactured metal bellows expansion joints, nonmetallic expanison joints, rubber eexpanison joints, ss corrugated hose, composite hose for high temperature. Witzenmann has been working consistently to these high standards for a long. Expansion joint selection expansion joint selection when practical. Im new to caesar ii and currently working on piping stress analysis inside steel plant. The president and founder of american expansion joints aej, tom brown, has spent his entire career in the expansion joint industry. Architectural building product information for expansion joint manufacturers association ejma. Ejma 10th edition, the latest revision, what has changed. Expansion joint bridge expansion, compression seal.
The new edition of ejma has some significant changes which are highlighted in this excerpt in addition to some useful relevant engineering data. Metal expansion joints and connectors, rubber expansion joints, te. 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. However specifi c applications can also be designed and produced using nonstandard and distinctly shaped bellows.
Lateral expansion joint applications lateral expansion joint installation angular expansion joint applications angular expansion joint installation what is expansion joint description of. This catalog outlines the selection and installation of our metal bellows. Jul 22, 2015 the expansion joint manufacturers association, inc. Air clean dust content chemical load by acids, solvents, etc.
Does not include bars for use as lifting hooks for reinforced concrete members. Analysis of the flue gas humidity contents of soot or fly ashes flushingwashing of ducts. Expansion joint selection expansion joint selection definitions fp fix point on the straight pipe fp fix point placed in the corner lfp light. This product is designed for the chemical processing and. Failure evaluation on used expansion joints using a movement test. The expansion joint shall be able to handle the axial, lateral. The new edition of ejma has some significant changes. The expansion joint manufacturers association ejma, the authority on metal expansion joints, has revised the standards in the latest 10 th edition ejma standards are recognized throughout the world. Ejma expansion joint manufacturers associaton member. Pathway has more experience with this process than any other expansion joint company. Ihs markit is your source for ejma standards and publications.
A bellows expansion joint is an assembly of two or more. It was founded in 1955 to create and maintain a set of standards for quality expansion joint design and manufacturing. These standards combine the knowledge and experience of the associations technical committee and are available. 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. We have worked very closely with the licensor for many years to develop the designs and implement improvements to prolong the life of the expansion joints in this very severe service. Custom expansion joint manufacturer american expansion joints. Bellow units of expansion joins are produced from stainless steel of thickness 0,1 to. In 1916, badger began manufacturing convoluted metal bellows expansion joints and is considered one of the leaders in the expansion joint industry today. Emseal expansion joint and sealant catalog download or print. Designing with expansion joints 7 pressure thrust ejma which types of expansion joints have this problem. Axial lateral angular expansion joints, bellow, gujarat. An expansion joint comprehends a bellows element, which. The newly expanded 2020 emseal structuralarchitectural expansion joint and sealant catalog features 44 pages of the latest emseal watertight expansion solutions. The expansion joint manufacturers association, inc.
S4 is allowed by ejma to exceed the initial yield strength of the bellows material by. Receive a free copy of a practical guide to expansion joints with each printed copy of the tenth edition, you will receive ejmas practical guide to expansion joints, a pocket size primer based on ejma standards. The guide is intended to provide users with a basic understanding of expansion joints. 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. Ejmastandards expansion joint manufacturers association, inc. The convoluted portion of an expansion joint is designed to flex when thermal. Requirements for rolled steel bars other than plain round bars that have been cold worked to such an extent that their yield point has been eliminated. Ejma was founded in 1955 to establish and maintain quality. It is available as a downloadable pdf web resolution or as highquality printed catalog. The expansion joint manufacturers association is an organization of established. Emseal expansion joint and sealant catalog download or.
It was founded in to create and maintain a set of standards for quality expansion joint design and manufacturing. Ejma was founded in 1955 to establish and maintain quality design and manufacturing standards. Ejma expansion joint manufacturers associaton member u. Pdf the failure of a bellow expansion joint of 304 stainless steel has been analysed. Over 50 years of challenges in the expansion joint industry proves that eagleburgmann ke is one of the worlds most experienced and innovative expansion joint manufacturers. Accordingly, the expansion joint manufacturers association ejma formula for torsional stiffness calculation is modied using two different equivalent radii. Cern document server access articles, reports and multimedia content in hep. Pdf failure evaluation on used expansion joints using a.
S2 is the stress which runs circumferentially around the. Definition of the use of expansion joints bellows in piping. Designing with expansion joints 7 pressure thrust ejma which types of expansion. Expansion joint bridge expansion, compression seal joints. Axial lateral angular expansion joints, bellow, gujarat, india. This ebook can only be opened on 1 device and no printing or copying of the content is allowed. Benefits the seal is compressed into place, providing a relatively flat profile surface that reduces tripping hazards and the collection of debris in the joint. Expansion joints are always the simplest and most effective.
Experience is sourced from all continents and various market sectors to provide our customers with the latest technologies and solutions. Receive a free copy of a practical guide to expansion joints with each printed copy of the tenth edition, you will receive ejmas practical guide to expansion joints, a pocket size primer based on. Axial, universal type for lateral and axial movement and hinged and gimbal joints for angular rotation in one and any plane. Ejma 10th edition the latest revision fatigue material. In line pressure balanced expansion joint two ply monitored bellows design temperature. Metal expansion joints and metal bellows hose master. 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. It was founded in 1955 to create and maintain a set of standards for quality expansion. Designing with expansion joints 8 pressure thrust for a bellows type expansion joint, the pressure. Each expansion joint produced by witzenmann can be designed 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. The expansion joint manufacturers association is an organization of established manufacturers of metal bellows type expansion joints. Using customerprovided components from an expansion joint removed from service, hose master can replace bellows and often reuse preexisting pipe and fittings. The data on some of the expansion joints from metraflex are presented first in this guide. Designing with expansion joints becht engineering company, inc. Can some one suggest me on the stiffness part and pressure thrust force at the expansion joint location. Ejma, standard of the expansion joint manufacturers association, 8 th. The expansion joint manufacturers association ejma, the authority on metal expansion joints, has revised the standards in the latest 10 th edition ejma standards are recognized throughout the world as the authority on the proper selection and application of metallic bellows type expansion joints for safe and reliable piping and vessel installation. Typical media that fabric expansion joints will get subjected to are. Expansion joint manufacturers association wikipedia.
The list of acronyms and abbreviations related to ejma expansion joints manufacturers association. Type of expansion joint advantages disadvantages bellows ejma. Standard specification for circular metallic bellows type. Bellows has been a ejma member since 2002 with representation on both the technical and management committees. There are some significant changes in the tenth edition of the ejma. Expansion joint manufacturers association ejma standard suggested that solution annealed treatment must be carried out for austenitic stainless steel after cold working in order to eliminate the. The torsional stiffness of bellows is determined using chiens integration method. Ejma the expansion joint manufacturers association, inc. Find steel expansion joints related suppliers, manufacturers, products and specifications on globalspec a trusted source of steel expansion joints information. Ejmastandards expansion joint manufacturers association. 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 tube is then worked up into bellows using mechanic and hydraulic forming methods.
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