Bellows design calculation metal expansion joints, metal. Ejma module package lauterbach verfahrenstechnik gmbh. The authority on expansion joints the ejma standards receive a free copy of a practical guide to expansion joints with each printed. The calculation of universal type expansion joints has been simplified by a. An evaluation of ejma stress calculations for unreinforced. The expansion joints were shipped minus the shipping bars that usually hold the joint to a specific over all length. Numerous researchers have conducted studies on bellows expansion joints with the help of standards such as asme and ejma. Cover plates shall be used over expansion joints at sidewalks. Ranflex industries, bangalore, ejma calculation report. In addition greg, a degreed engineer, served on both the ejma expansion joint manufacturers association technical and management committee tasked with developingupdating bellows and expansion joint performance criteria. Each expansion joint produced by witzenmann can be designed and. The numbers used for the expansion joint examples in this topic are for illustrative purposes only. Includes one copy of practical guide to expansion joints.
But how i can simulate these loads isolated in caesar ii. Vibrations which cause repetitive deflections can cause a premature failure of a pipe expansion joint. We are able to manufacture bellows from 2 nd to 144 nd as our. Because the anchor point does not move, the pipe located between the anchor and equipment expands into the joint. Ejma bellows calculator free download as excel spreadsheet. A bellows expansion joint is an assembly of two or. This ebook can only be opened on 1 device and no printing or copying of the content is allowed. Triad bellows design and manufacturing uses bellows design software based on ejma. Fatigue life cycles to failure ejma 41,224 expansion joint.
Ejma 10th edition is the most current edition and supersedes all previous publications. The tenth edition standards combine the knowledge and experience of the leading manufacturers of expansion joints. Ejma the expansion joint manufacturers association, inc. Macoga expansion joints, metal expansion joints design. In simple words, they are junction points which carry the emerging loads on the pipe section. Technical assistance standards of the expansion joint manufacturers association, inc. Lateral expansion joint applications lateral expansion joint installation angular expansion joint applications angular expansion joint installation what is expansion joint description of compensators. Expansion joint engineering according to design codes such as ejma, asme, ped, en 445, en 149147 etc. The expansion joint assembly will be installed and the blockout concrete placed after profile grinding has been completed.
Metal expansion joints and connectors, rubber expansion joints, te. Its the same method that we can find at ejma standards. Ejma benchmark calculations free download as pdf file. Designing with expansion joints becht engineering company, inc. The number of cycles is important to assure the proper design of the pipe expansion joint, since each design has a finite, but predictable life. Typical narrow arch expansion joint movementspring. Prediction of cycle life of flexible pipe bellows science publishing. Expansion joints, rubber pipe, retaining rings, control units. Hyspan expansion joints, expansion joint technical. The information set forth is based upon the substantial experience in research, design and application of rubber expansion joints by engineering personnel associated with the member companies of the nonmetallic expansion joint. Abyc standards manual pdf kpappide, ejma standards. Definition of the use of expansion joints bellows in piping. Expansion joint application and design course covers how to provide flexibility in the piping system by employing expansion joints to accommodate thermal expansion and contraction of sections of pipes or ducts. And for api 610, what is the load used for calculations.
Purchase of standards includes a free practical guide with each book. These standards combine the knowledge and experience of the associations technical committee and are available to assist users, designers, and others in the. Ejma standards pdf free download download d77fe87ee0 download ejma the expansion joint manufacturers association standards 2008. A bellows may also be designed to absorb mechanical. Whether youve loved the book or not, if you give your. Ejma carries out extensive technical research and testing on many important aspects of expansion joint design and manufacturing. Ejmastandards expansion joint manufacturers association. Caesar ii recommends that you verify all values used from a qualified technical source. Bellows of special expansion joints are designed according to ejma code. Ejma bellows calculator pounds per square inch mechanical. Each joint is designed to consume 2 of contration and expansion total 4 movement. If we do a hand calculation according with ejma, its possible to isolate the compressive load on the nozzle.
Patents include high temperature piping restraint structures for expansion joint. If we do a hand calculation according with ejma, its possible to isolate the compressive load on the nozzle and the load that goes to pump anchor. Welcome to triad bellows stainless steel exhaust bellows data sheets page. Apr 09, 2020 ejma standards pdf documents similar to ejma 9th standards of expansion joint manufacturers association 9h. 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. 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. Mar 05, 2017 ejma addresses the placement of anchors and. An expansion joint refers to a metal bellows expansion joint designed to absorb axial, lateral and angular motions in piping system. This catalog outlines the selection and installation of our metal bellows. Lauterbach verfahrenstechnik gmbh has converted the plant into a calculation. Ejma was founded in to establish and maintain quality design and manufacturing standards. It discusses the parameters and conditions specified by the piping system designer and how to.
Ejma was founded in 1955 to establish and maintain quality design and manufacturing standards. The other is in accordance with the standards of the expansion joint manufacturers association. Use our different data sheets as references to see which bellows will meet your needs. Fmh expansion joints design of bellowsdesign of bellows the bellows is the flexible element of an expansion joint consisting of one or more convolutions and the end tangents. The coefficient list, graphical chart and calculation example are shown on the reference data. Before purchasing expansion joints for your potable water pumping system, try out 3dimensional cad models of nsfansi 61 certified expansion joints. Installation instruction for megaflexon axial expansion joints. Based on customer requirement, design calculation can be made as per ejma. The expansion joint manufacturers association standard, 7th edition, 2000 addenda allowable stress basis. Ejma the expansion joint manufacturers association. Acknowledging thermal growth as part of pump system operation and addressing it with expansion joints means proactively ensuring a healthy life span of your pumps. Ejma expansion joint means this expansion joint is designed or tested by ejma calculation, to ensure the feasibility and safety the ejma standards are used worldwide as a reference for the proper selection and application of metallic bellows expansion joints.
An expansion joints is an assembly designed to absorb the expansion and contraction of various construction materials, to absorb vibration, or to allow movement due to ground settlement or earthquakes. Is there a section of asme covering the design and fabrication of bellows expansion joint or every manufacturer are fabricating to ejma standard thanks. We use the most sophisticated analysis and calculation software to design your pipe systems and select the most appropriate expansion joints. 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. Ejma standards expansion joint manufacturers association, inc. The expansion joint manufacturers association ejma, the authority on metal expansion joints, has revised the standards in the latest 10th edition ejma standards are recognized throughout the world as the authority on the proper selection and application of metallic bellows type expansion joints. Db inside diameter of cylindrical tangent and bellows convolutions. Design, manufacturing and analysis of metal expansion bellows. It was founded in 1955 to create and maintain a set of standards for quality expansion joint design and manufacturing. Bellows vendors will often quote two different cycle lives for their bellows. The expansion joint manufacturers association, inc. Fatigue life cycles to failure ejma 41,224 expansion joint spring rates axial spring rate lbs. Ejma standards pdf documents similar to ejma 9th standards of expansion joint manufacturers association 9h.
These computer programs help determine engineering. Provide blockouts in decks and approach slabs at expansion joints to allow for placement of the joint. The calculation of universal type expansion joints has been simplified by a modified equation for the axial movement per convolution. This element is designed to absorb thermal movements that result from a change in temperature in a piping system.
Design calculation for four types expansion metal bellows like unreinforced, reinforced, rectangular and toroidal. Expansion calculation leaders in pipe joint restraint and. Ejma hand calculations x caesar ii intergraph cadworx. Ejma tolerances for the installation and manufacture of. Uses bellows design software based on ejma 10th edition guidelines.
The guide is intended to provide users with a basic understanding of expansion joints. Ejma expansion joint manufacturer association latest standard 9th edition and asme. The latter provides a significantly higher cycle life. Standards of the expansion joint manufacturers association, inc. It was founded in to create and maintain a set of standards for quality expansion joint design and manufacturing. The ejma calculation for squirm is based on the ends of the pipe run. Expansion joints 2 once an expansion joint is put into the system, the pipe wall is no longer available to take this longitudinal stress, and the piping and restraints are now exposed to a.
It is essential that the weld in the bellows be as strong as the surrounding. Designing with expansion joints 8 pressure thrust for a bellows type expansion joint, the pressure. This element is designed to absorb thermal movements that result from a change in temperature in a. Aug 08, 2019 ejma standards pdf documents similar to ejma 9th standards of expansion joint manufacturers association 9h. Bellows calculation according to ejma standards of the expansion joint manufacturers association inc. These standards combine the knowledge and experience of. Expansion joint manufacturers association wikipedia. Other readers will always be interested in your opinion of the books youve read. Ejma standard of the expansion joint manufacturers association. Metallic expansion joint project standards and specifications page 3 of 9 rev. Jul 31, 2019 ejma standards pdf documents similar to ejma 9th standards of expansion joint manufacturers association 9h. Expansion joint cyclic deflections and cycle life u. 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.
Ejma is an organization of the leading international manufacturers of metal bellows expansion joints. Peng criticism is addressed to the fact the anchor is so important in the application of bellow expansion joints that many engineers seem to automatically place an anchor or anchors in an expansion joint installation. The calculation of universal type expansion joints. The 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. Triad bellows design and manufacturing uses bellows design software based on ejma 10th edition guidelines. Designing with expansion joints 7 pressure thrust ejma which types of expansion joints have this problem. How a steam turbine cross over expansion joint works. The ejma standards are used worldwide as a reference for the proper. Senior flexonics catalogs provide detailed specifications about our products and are a great reference for your specific application. Are points which seperateand isolate expansion sections constituted on the pipe system. The expansion joint manufacturers association is an organization of a metal bellows expansion joint manufacturers. When it comes to expansion joints we offer overall solutions to meet your particular needs.