I need EJMA Standard 10th Edition? Can anyone share? Petroleum Community Forum -Free Discussion and Education Community. Help. EJMA BOOK OF STANDARDS: Standards of the Expansion Joint Manufacturers Association, Inc. – Includes one copy of Practical Guide to Expansion Joints. The EJMA Standards are recognized throughout the world as the authority on the proper selection and application of metallic bellows type.

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Definitions in the Nomenclature section 1. Project 2 post s. Systems 2 post s. This includes standard conversions in addition to constants used in calculations. The distinction of thin versus thick bellows has been added.

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The minimum control requirement of the bellow tube has standare be X-ray or DPI prior to forming. Machinery 19 post s. What is Bellows Pressure Thrust? With bellows, design for an excessive number of cycles can unnecessarily compromise other design aspects, such as design with respect to internal pressure and column stability resistance to squirm.

They seemed too high. Process Consulting 10 post s.

However, if you require an alloy that is currently not in our database, we will examine the alloy to determine it’s welding and ductility properties. Response dtandard Stress Question. Single Bellows Axial Vibration Constants were revised. The EJMA bellows fatigue curve is a best fit ejna based on data that was available, so it provides an expected average cycle life.

Per Ejma I need the allowable at design to check the calculated stresses. Standadd new E-book version of the new 10th Edition Standards can be downloaded to your PC, laptop or tablet. Guest – Tom Vowell on Sunday, 20 October The Tenth Edition standards combine the knowledge and experience of the leading manufacturers of expansion joints into an invaluable reference document.


A sample of this analysis is shown below: This fere be a very good development as it will lead to more uniform design practices and less confusion. By utilizing pipe stress analysis software, American BOA is able to model shandard systems to ensure that the expansion joints selected for your system do not result in detrimental loading on stqndard nozzles or rotating equipment. American BOA uses a combination of 3D modeling software along with finite element analysis FEA to determine the correct hardware for your design conditions.

Expansion Joint Engineering Innovation. The software utilized for solid modeling and FEA work in conjunction with each other to allow the shortest possible time from concept model to production drawing generation.

Heavy Lift 14 post s. Subscribe to this blog post Unsubscribe. Click to Request Info. Perhaps there was confusion over which code was applicable. I cannot imagine that for simple applications the bellow tube Always has to be x-rayed or DPI tested.

When using this curve, it should be recognized ej,a appropriate design margins are already included, and they should not also be included in the specified number of cycles.

Hi, I have a question about the examination in Appendix The Guide is intended to provide users with a basic understanding of expansion joints.

The Difference Between ASME B31.3 Appendix X and EJMA Fatigue Curves for Bellows?

Available Positions Apply On-line. The design would be EJMA. Pressure Vessels 18 post s. If a bellows can be manufactured from the material, we can easily add it to the database to perform your analysis. Becht Nuclear 36 post s. American BOA is often requested to aid customers in the proper selection of expansion joints for their particular system. Subscribe to our blog Unsubscribe from our blog. The Authority on Expansion Joints The EJMA Standards are recognized throughout the world as the authority on the proper dtandard and application of metallic bellows type expansion joints for safe and reliable piping and vessel installation.


He is an ASME Fellow and has more than 60 publications and five patents and is a frequent speaker and chairman in technical forums. Fatigue life calculations were greatly enhanced and simplified.

Benchmark table inputs and outputs have been revised, with material class and correction factor. And the allowale stresses can be different which different codes. Bellows pitch and height tolerances were redefined relative to diameter.

Utilizing this program, we can easily perform all of the analyses noted above utilizing over 35 different materials including:.

This would result in a margin of safety entirely dependent upon the designer, and could vary from large, to none. Due Diligence 6 post s.

Metal Expansion Joint Engineering

Materials Degradation and Corrosion 16 post s. This Guide is not intended as a source for expansion joint design or application details.

Sa is the allowable stress from the applicable code. Subscribe to this blog post Please fill in your email address to subscribe to updates from this post. Tom Vowell on Wednesday, 16 October