EJMA-The Expansion Joint Manufacturers Association, Inc.
The Expansion Joint Manufacturers Association is an organization of established manufacturers of metal bellows type expansion joints.
EJMA was founded in 1955 to establish and maintain quality design and manufacturing standards. These Standards combine the knowledge and experience of the association’s Technical Committee and are available to assist users, designers, and others in the selection and application of expansion joints for safe and reliable piping and vessel installation.
EJMA carries out extensive technical research and testing on many important aspects of expansion joint design and manufacturing. EJMA 10th Edition is the most current edition and supersedes all previous publications.
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. Expansion Joint Design Software. Ejma Bellow Design Software, Find Complete Details about Ejma Bellow Design Software,Ejma from -Tecraft Supplier or Manufacturer on Alibaba.com. Design of pressure equipment according to AD 2000, EN 13445 or ASME VIII. European standards EN 14025, EN 1591, EN 13480, EN 12516. Flanges and gaskets. Material Database. Calculation of 3-D piping systems with the program LV PIPE II. Full version for trial use ( more info ) This post is also available in: Deutsch (German). Kim and Jang had developed a design software using MATLAB known as Bellows Designer with the help of EJMA regulations in which the MATLAB GUI is used to make the access of the program code easy.
Ejma Bellows Software Applications' title='Ejma Bellows Software Applications' /We are a professionally managed marketing organisation actively engaged in the sale of highquality products manufactured by some of the leading engineering companies. Stourflex manufacture specialised pipework expansion products.
Triad Bellows Design and Manufacturing uses bellows design software based on EJMA 10th edition guidelines.
Cd: The factor read from the EJMA Figure C26 (or ASME VIII) for the listed curve number and x value. It is used in specific design calculations to relate U-shaped bellows convolution segment behavior to a simple strip beam.
Cf: The factor read from the EJMA Figure C25 (or ASME VIII) for the listed curve number and x value. It is used in specific design calculations to relate U-shaped bellows convolution segment behavior to a simple strip beam.
Cp: The factor read from the EJMA Figure C26 (or ASME VIII) for the listed curve number and x value. It is used in specific design calculations to relate U-shaped bellows convolution segment behavior to a simple strip beam.
S1: Bellows tangent circumferential membrane stress due to internal pressure. In case of external pressure the reinforcing effect of a possible external collar is excluded.
S1: Collar circumferential membrane stress due to internal pressure. In case of external pressure the reinforcing effect of a possible external collar is excluded.
S2: Bellows circumferential membrane stress due to pressure.
S3: Bellows meridional membrane stress due to pressure.
S4: Bellows meridional bending stress due to pressure.
S5: Bellows meridional membrane stress due to deflection.
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S6: Bellows meridional bending stress due to deflection.
Rated Max Axial: The maximum amount of movement (axial extension, axial compression, lateral deflection, angular rotation, or any combination thereof) which an Expansion Joint is capable of absorbing. This rating may be different for each size, type and make of Expansion Joint and is established by the manufacturer.
Total Equivalent Max Axial: Bellows are rated by the manufacturer in terms of maximum allowable axial displacement per convolution, ec and ee. The design of every Expansion Joint must be such that the total displacement per convolution from all sources does not exceed the rated values.
Bellows Allowed Stress: Allowable material stress at design temperature, unless otherwise specified, from the applicable code.
Bellows E at Temperature: Modulus of Elasticity at design temperature, unless otherwise specified, for material.
Bellows Yield at Temp: Yield strength at design temperature, unless otherwise determined, of bellows material after completion of bellows forming and any applicable heat treatment.
Axial Working Spring Rate: In order to evaluate the loads upon piping, supports, or equipment, it is necessary to determine the axial forces and moments required to move an Expansion Joint. The bellows resistance factor or working spring rate is shown in lbs per inch of compression or extension.
Lateral Working Spring Rate: In order to evaluate the loads upon piping, supports, or equipment, it is necessary to determine the lateral forces and moments required to move an Expansion Joint. The bellows resistance factor or working spring rate is shown in lbs per inch of lateral offset.
Bending Working Spring Rate: This is the displacement of the longitudinal axis of the Expansion Joint from its initial straight line position into a circular arc. Angular rotation is occasionally referred to as rotational movement and is shown in LBS per degree. This is not torsional rotation.
Limiting Column Instability: Calculated maximum pressure in PSIG before expansion joint may squirm because of column instability.
Excessive internal pressure may cause a bellows to become unstable and squirm. Squirm is detrimental to bellows performance in that it can greatly reduce both fatigue life and pressure capacity.
Column squirm is defined as a gross lateral shift of the centre section of the bellows. This condition is most associated with bellows which have a relatively large length-to-diameter ration and is similar to the buckling of a column under compressive load.
Limiting Inplane Instability: Calculated maximum pressure in PSIG before expansion joint may squirm because of inplane instability.
In-plane squirm is defined as a shift or rotation of the plane of one or more convolutions such that the plane of these convolutions is no longer perpendicular to the axis of the bellows. It is characterized by tilting or warping of one or more convolutions. This condition is predominantly associated with high meridional bending stress at the root and crest of the convolutions.
Allowed Cycles: The fatigue life expectancy can be defined as the total number of complete cycles which can be expected from the expansion joint. A cycle is defined as one complete movement from the initial position in the piping system to the operating position and back to the initial position. Cycle Life is theoretical and is dependent upon the maximum stress range to which the bellows is subjected. The fatigue life expectancy of an expansion joint is affected by various factors such as: operating pressure, operating temperature, the material from which the bellows is made, the movement per convolution, the thickness of the bellows, the convolution pitch, the depth and shape of the convolution. Any change in these factors will result in a change in the life of the Expansion Joint. The work hardening of austenitic stainless steel, induced during the forming of convolutions, generally improves the fatigue life of an Expansion Joint often to a marked degree.
Convolution Depth w: Convolution height less the bellows material thickness.
Bellows Length Le: Bellows convoluted length (Lb) plus the length of the bellows tangent ends or necks.
Bellows Length Lb: Bellows convoluted length or live length.
Bellows Length Lu: Distance between outermost ends of the convolutions in a universal expansion joint. Zero length is shown for single bellows.
Total Length: Total length of the expansion joint including the possible pipe ends. It is calculated as either Lb or Lu plus length of pipe ends.
Thickness tp: Bellows material thickness for one ply, corrected for thinning during the forming of the bellows convolutions.
Effective Area Ae: Axial force or pressure thrust is caused by the internal pressure of the bellows. This is calculated on the full effective cross section of the bellows known as the effective area. Pressure thrust can be calculated by multiplying the working pressure by the effective area (PSIG x Ae).
Factor Ku: Factor establishing relationship between the equivalent axial displacement per convolution due to lateral deflection.
Thrust Force: Axial force or thrust caused by the internal pressurization of the bellows. The thrust force is calculated by multiplying the working pressure by the effective area (PSIG x Ae).
Expansion Joint Design Software Our expansion joint design software is mainly for companies and individuals who are designing or checking bellows or compensator designs. Bellows are calculated to, ASME and EN standards. Individual component design programs use generally accepted design formulas and our own proven proprietary calculations. These programs do not use the finite element methods and are therefore easy to learn and use.
- Dubai Ejma Bellows. Kellogg`s formula, (2) formula of EJMA, (3). Software for the simulation of the metal expansion bellows before realization of the bellows.
- The Expansion Joint Manufacturers Association, Inc. Is an organization of established manufacturers of metal bellows type expansion joints.
EJMA and ASME Standards. Of the expandable metal bellows / joints design. This software has been developed as a. Type’s expansion Metal bellows like un.
Designs may be more conservative but are very fast to produce. Even a salesman who is not doing designs everyday can use them. All programs have high quality printouts of the calculation input and output. Company's logo can be included into the prints. We do not believe in having one large program. Such programs are nearly impossible to maintain and keep error free. Each of our programs is designed for a specific purpose, for ease of use, to be fast and reliable.
We are primarily design and consulting company and the software is developed based on our technical knowledge and experience. With our programs you the designer can design expansion joints that you need and not what some software designer assumed you need. Bellows Master II is a bellows calculation program. It is a stand alone application for Windows operating systems. Bellows are calculated according to two editions of EJMA (Expansion Joint Manufacturer’s Association), ASME B31.3 Appendix X and ASME XIII Division 1 Appendix 26.
It is very user friendly with full error checking for data entry and can therefore be used by a salesman or any other person who has some knowledge of compensators. No extrapolation of factors or material values is needed. Everything is included in the program. Bellows Master II is available in standard form and customized for a bellows manufacturer. Customized version includes manufacturer's tools, special bellows shapes and any other requirement manufacturer wishes to include. Using this fully customized program you will not be able to design a bellows your company cannot produce.
For those who use hydro forming the program calculates required forming pressures, ram forces and tool settings including required material cut lengths and widths. The program has an installation program and very large help file. Bellows Master II has its own dedicated. Bellows Master II EN is a bellows calculation program.
It is a stand alone application for Windows operating systems. Bellows are calculated according to EN 14917, which is the latest European standard for expansion joints. It is similar in style to Bellows Master II and is also very user friendly with full error checking for data entry and can therefore be used by a salesman or any other person who has some knowledge of compensators. No extrapolation of factors or material values is needed. Everything is included in the program. The program has an installation program and very large help file.
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RecBel is a program to calculate rectangular bellows to EJMA design code suplemented with possibility to calculate ferritic bellows elements without expensive fatigue testing. For austenitic bellows elements designer has option to use his own fatigue test results, EJMA round bellows published values with additional safety factor or combination of the two. For ease of use the program has the same user interface as our Bellows Master II. This program is for Windows. The program has an installation program and large help file. ThickBel is a program to calculate thick bellows element to ASME VIII Div 1 Appendix 5.
Program is fully analytical and therefore it is easy and fast to use. Alternative options are complex and expensive FEA or some of the full pressure vessel design programs that include similar module.
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Bellows manufacturer can now cheaply and easily optimize the thick wall bellows to suit their manufacturing capabilities. Four different bellows shapes are included in to the program.
This program is for Windows. The program has an installation program.
AxMov Tool is a program to quickly calculate bellows' required axial movement due to thermal expansion of a pipeline or vessel. It also calculates recommended pre-setting of the bellows if the pipeline's metal temperature during erection differs from 20 C. This program is for Windows and it has its own help file and an installation program. HinMov Tool is a program to quickly calculate bellows' required angular movements in a 3 hinge system due to thermal expansion. This program is for Windows. The program has an installation program and its own help file.
Flange Tool is a program to calculate oval and round flanges used for universal and gimbal compensators. Flanges can be blind or with a centre hole and both types may or may not have flange bolts. The program is easy and fast to use.
Results may be slightly conservative compared to finite element methods but are faster and cheaper to produce. Intended users are estimators, sales and designers. It includes calculation of the bellows' pressure force and allows you to include external additional loading of the rods attached to the flanges. This program is for Windows.
The program has an installation program. Pin Master is a program for bellows hinge pin calculation.
Program is easy and fast to use. It includes calculation of the bellows' pressure force and allows you to include external additional loading of the pins. This program is for Windows. The program has an installation program. Rod Master is a program for bellows' control rod calculation.
Program is easy and fast to use. It includes calculation of the bellows' pressure force and allows the inclusion of external additional loading of the rods.
This program is for Windows. The program has an installation program. Gimbal Master is a program to calculate two types of gimbal rings used in compensators.
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The program is easy and fast to use. Results may be conservative compared to finite element methods but are faster and cheaper to produce. Intended users are estimators, sales and designers. It includes calculation of the bellows' pressure force and allows you to include external additional loading of ring.
This program is for Windows.The program has an installation program. Bracket Master is a program to calculate various types of restraining bar brackets for compensators. The program is easy and fast to use.
Results may be conservative compared to finite element methods but are faster and cheaper to produce. Intended users are estimators, sales and designers.
It includes calculation of the bellows' pressure force and allows you to include external additional loading of the brackets. This program is for Windows. The program has an installation program. HeatTool is a program to calculate bellows element's metal temperature in high temperature applications.
Codes require use of fluid temperature for the design if the actual metal temperature is not established. Using HeatTool program the designer can use more realistic metal temperature and substantially improve the design. Program can be used also to check that the metal temperature is not below the sulphuric acid dew point. The program is easy and fast to use. This program is for Windows.
The program has an installation program. For more information about any of these programs please.
Vinkarr Technologies Pvt Ltd., Customized ERP Solutions For Engineering Industries and Trading Mobile Applications, Online MLM Binary Solutions, CAD Automations Consultancy Services, Web Design Hosting and Maintenance Services. Bellows Design Metal Bellows Design Software Solutions (MBDSS) Version - 9.0 EJMA and ASME Standards 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. This software has been developed as a standard / customized package complying with the standards of both EJMA Ninth Edition and ASME. The design offers excellent flexibility in terms of selecting the material and calculating design data for the metal bellows. The Unique Features Of The Application Every material Property is integrated with this package. It is easily adaptable to the various raw material properties based needs of the users. Selection of Materials vis-a-vis to working temperature and design pressure is computed by using the Material property values which is retrieved from the material Property tables.
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User friendly unit conversion facility which can be adapted based on the raw material which is intended for. (In Psi/ Bar, Kg/Sq.Cm and Mpa ) is available.
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EJMA (Expansion Joint Manufacturer Association) latest standard 9th edition and ASME. Design calculation for four type’s expansion Metal bellows like un-reinforced, reinforced, rectangular and toroidal. Based on customer requirement, Design calculation can be made as per EJMA standard and ASME. User friendly alert Messages at various Stage. Movements, Stress Conditions, Cycle Life, Creep Range Flexibility in changing the Mechanical Properties Table values for any Materials during Design calculations.
High level security. Any change in Ejma standard can be incorporated. All formula with input data and detailed calculations provided to evaluate for all calculations manually. Final Calculations results both EJMA and ASME Standards. Modules Reinforced (Single / Dual) Unreinforced (Single / Dual) Rectangular (U / V Profile, Single / Dual) Toroidal (Single / Dual). Optional Units ( Psi / Bar Or Kg Per Sq.Cm and Mpa ) Table Values ( Edit or View ) This ensures your customized solution based on EJMA and ASME All of the formula calculation and values are based on EJMA Latest version 9th Edition and ASME. The input & output values are perfectly cross checked with the Bench mark calculations.
Basic Inputs ♦ Nominal Bore NB ♦ Inner Diameter of the Bellow ID ♦ Thickness of Material t ♦ Convolution Height W ♦ Convolution Pitch q ♦ No. Of Plies n ♦ No.