Expansion joints are nonstandard devices which shape and parameters could vary with temperature, pressure, displacement and cycle life. In fact, theyve become so familiar that many engineers now think of bellows as generic items. All expansion joints also known as bellows are engineered specifically to suit the customers project and to solve the expansion problem. The definitions in this design guide are related to columns 1 through of the stock bellows data list. Designer and manufacturer of expansion joints belman as. So no worries when i will go for bellow type joint. We use the most sophisticated analysis and calculation software to design your pipe systems and select the most appropriate expansion joints providing you a complete pipe stress analysis when required. One approach is to calculate the allowable parallel off set of bellows based on their parameters. Al mufaddal engineering and marine services llc started designing and producing bellows under the brand name flexibel. When it comes to expansion joints we offer overall solutions to meet your particular needs. The expansion joint manufacturers association, inc. In this application, bellows are formed in series to absorb thermal movement and vibration in piping systems that transport high temperature media such as exhaust gases or steam. Standard tolerances are noted in the metal bellows design guide.
The main objective of this paper is to perform numerical analysis to find various characteristics of stresses in ushaped metal expansion bellows as per the requirement. Manufacturer of metal bellows since 1961 metal bellows design guide the following definitions are provided to assist in part selection and customization to meet engineering design requirements and. Badger engineers employ a combination of proprietary bellows design software, cad3d modeling, and finite element analysis fea to design expansion joints. Triad bellows design and manufacturing uses bellows design software. Metal bellows options triad bellows design and mfg. Design assessment and parametric study of expansion bellow. Many design formulae of bellows can be found in asme code 1. The design of every expansion joint must be such that the total displacement per convolution from all sources does not exceed the rated values. Numerical investigations on characteristics of stresses in u.
The most common method is the inclusion of expansion elbows, loops, or zbends. Therefore, free expansion must be allowed to occur, but expansion must ultimately be compensated for through system design. Ejma 10th edition is the most current edition and supersedes all previous publications. This note gives two approaches to design the bellows which are employed in gem beam pipe system. Development of graphics software of bellows expansion joint. Expansion joint engineering according to design codes such as ejma, asme, ped, en. This software has been developed as a standard customized package complying with the standards of both ejma ninth edition and asme. Maximum design pressure based upon squirm, psig 150 fatigue characteristics total stress range for all movements st, psi 5,680 fatigue life cycles to failure ejma 41,224 expansion joint spring rates axial spring rate lbs.
Different types of expansion joints are widely used in piping industries. The expansion joint manufacturers association standard, 7th edition, 2000 addenda allowable stress basis. Bellows expansion joint design vs asme nukie nuclear op 3 dec 01 20. It is necessary to provide accurate information regarding the condition of design that the expansion joint will be subjected to.
Our expansion joint design software is mainly for companies and individuals who are designing or checking bellows or compensator. Ejma was founded in 1955 to establish and maintain quality. Numerical investigations on characteristics of stresses in. Designing with metal bellows metal bellows have long been a key component in demanding sensing and sealing applications.
The drawing work of expansion joints is rather important. Macoga expansion joints, metal expansion joints design. In this case, my software automatically calculates the spring rate. We are a leading fabric expansion bellow manufacturer in kolkata. In order to provide a valuable tool to ease the daily work of all. It is good practice to leave one flange loose until the expansion joint has been fitted into position. Is there a section of asme covering the design and fabrication of bellows expansion joint or every manufacturer. Bellows are widely used on articulated buses and trams, to cover the joint where the vehicle bends. Engineering and designing is done per ejma equations as well as per the latest revisions of the asme b31.
Development of graphics software of bellows expansion. Our product the metal bellows designs is only of its kind in the global market which has been specially developed to cater to the design analysis of the expandable metal. Ejma was founded in 1955 to establish and maintain quality design and manufacturing standards. Metal expansion joint engineering american boa inc. In this current research paper author developed the design of u shaped expansion bellow with the help of expansion design codes like asme and ejma. Belmans expansion joint solutions are effectively calculated and designed with the help of our inhouse developed software belmaker. Definition of the use of expansion joints bellows in piping. Specification for metallic expansion joint project standards and specifications table of content scope 2 references 2 units 2 design requirements 3 general 3 material 3 bellow design 3 bellows design criteria 4 mechanical design 4 external cover 5 internal sleeves 5 element identification and dimensions 5 welding and nondestructive. In the cross over in line pressure balanced expansion joint is replaced instead of single expansion joints and elbow pressure balanced expansion joints is also present in the cross over. Expansion joints technical calculation selection of the expansion joint the main function of expansion joints is to compensate the movements and vibrations in piping systems, machinery and equipment. American boa is a member of the expansion joint manufacturers association. Bellows features such as banded necks, resistance welded necks and expanded to size necks insures the success of. Ejma expansion joint manufacturer association latest standard 9th edition and asme. Flexpert bellows believe that our strong faith in client feedback.
And the most comprehensive and widely accepted text on bellows design is the standards of expansion joint manufactures association, ejma. An expansion joint is an assembly designed to safely absorb the heatinduced expansion and contraction of various construction materials. Specification for metallic expansion joint project standards and specifications table of content scope 2 references 2 units 2 design requirements 3 general 3 material. Bellows designs are performed using inhouse developed design software and calculations further checked. Using the latest technology available in computerized bellows design analysis to ejma guidelines, as well as a full complement of plc controlled bellows forming equipment. The addition of expansion joints in a piping system introduces reaction forces produced by the expansion joint that must be accommodated in the design of the piping system. With our 3d mechanical cad software our engineers design expansion joints to the same conditions that theyll experience in the real world before they have.
A design specification shall be prepared for each pipe expansion joint application. Then the design is modeled in the software inventor. Our wide spread manufacturing unit able us to manufacture and assemble large diameter bellows. Design calculation for four types expansion metal bellows like unreinforced, reinforced, rectangular and toroidal. Ejma carries out extensive technical research and testing on many important aspects of expansion joint design and manufacturing. Expansion joint selection software belmaker light belman as. Many design formulae of bellows can be found in asme code.
The addition of m to the last numeral ss1254680m indicates the stock bellows is. Our technically expertise and vide experienced design staff, international design calculating software collaborates to delivery our customer perfect bellows. Calculation of bellow parallel offset sanyi zheng sscl april 14, 1993 abstract. Our indepth understanding of the different standards and our expertise in. Expansion bellows can relieve these stresses and also reduce the transmission of noise and vibration to the pipe system. The movements that the expansion joint has to compensate are always movements from one part of the piping system relative to another.
Our technically expertise and vide experienced design staff, international design calculating software. Advances in engineering design and optimization ii. Prior to writing the expansion joint design specification it is imperative that the system. Triad bellows design and manufacturing uses bellows design software based on ejma 10th edition guidelines. A set of accurate, reliable and strong practical professional graphics software is needed for expansion joint industry. Technology metal bellows metal bellow manufacturer bellows.
Please consult factory when modifications are required. Number of pilot and test experiments have been performed for analysis of am350 steel bellows by shaikh et al. Water hammer and flow induced movement and vibration turbulent and high velocity flow of liquids in pipes can cause pipe displacements where the liquid acts upon direction changes and reductions in the pipe system. Ejma 10th edition is the most current edition and supersedes all previous. In fact, theyve become so familiar that many engineers now think of bellows as. In order to provide a valuable tool to ease the daily work of all engineers associated with expansion joints, we have developed a similar technologically advanced software belmaker light. Universal bellows expansion joints are usually long and are designed such that the thermal expansion of the entire units length is accepted as compression by the two bellow elements and as a result the.
Our experience and broad product range enable us to provide high quality solutions and services for the benefit of our customers. Metal bellows design software solutions mbdss version 9. Just specify a few key dimensions, pick a metal alloy and youre good to go. An expansion jointbellow element employed in a piping system is an assembly of generally more than one convolute in series. The software used by belman is tested and validated through close. By stretching, compressing, or offsetting the joint to fit the piping, the joint may be overstressed when the system is in service. The expansion joint manufacturers association is an organization of. Thermal expansion will occur between all fixed points in the piping system.
Flexpert bellows believe that our strong faith in client feedback coupled with our relentless commitment towards the highest possible product quality standards makes our piping expansion joints such a success. Bellow design posted on 20200326 by custom bellows design servometer. Based on customer requirement, design calculation can be made as per ejma standard and asme. Design calculations are performed using design software developed inhouse and calculations are further checked using hand calculations. With our 3d mechanical cad software our engineers design expansion joints to the same conditions that theyll experience in the real world before they have been built. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. For all flexible elements to perform efficiently, it is imperative that the bellow. The vision is to provide durable joining solutions for rigid applications. This is a design validation tool that helps our engineers to test the designs earlier in the design cycle and against realworld conditions. Design and thermal analysis of thermal expansion joint in. Metal expansion bellows are a mechanical device for absorbing energy or displacement in structures. Piping expansion joint design basics metal bellows archives arcflex. In addition we offer assistance with welding techniques.
A design specification shall be prepared for each expansion joint application. This number is used to order a bellows made to stock dimensions listed in our catalog metal bellows test data of stock. The addition of expansion joints in a piping system introduces reaction forces produced by the expansion joint that must be accommodated in the design. The addition of m to the last numeral ss1254680m indicates the stock bellows is to be modified. Bellows are rated by the manufacturer in terms of maximum allowable axial displacement per convolution, ec and ee. Our product the metal bellows designs is only of its kind in the global market which has been specially developed to cater to the design analysis of the expandable metal bellows joints design. Owing to its experience, our engineering department can offer you a solution that is tailored to the specificities of your request. Flexpert bellows stainless steel expansion bellows metal. Aadesh industrial corporation was founded in 2003 for manufacturing engineered bellows.
It is widely used to deal with vibrations, thermal expansion, and the angular, radial, and axial displacements of components. Expansion joints technical calculation selection of the expansion joint the main function of expansion joints is to compensate the movements and vibrations in piping systems. The structures of most bellows expansion joints are not complex, and their geometries are relatively. The heart of the expansion joint is the bellows element itself. Rubber bellows manufacturer momtaj rubber industries. In addition we offer assistance with welding techniques, cost saving possibilities and time saving options. Bellows expansion joint design vs asme asme mechanical. Bellows expansion joint design vs asme kstaylor mechanical 4 dec 01 16. For all flexible elements to perform efficiently, it is imperative that the bellow component of the integrated assembly is designed to meet the application conditions. Bellows design calculation metal expansion joints, metal. We use the most sophisticated analysis and calculation software to design your pipe. Bellow expansion joints 3d cad model library grabcad.217 33 677 754 706 1019 540 208 1410 1212 949 48 980 1417 738 420 1330 1456 726 246 470 416 926 587 138 903 540 607 464 983 944