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.

Author: Goltishura Faulabar
Country: Iraq
Language: English (Spanish)
Genre: Relationship
Published (Last): 11 August 2009
Pages: 259
PDF File Size: 18.71 Mb
ePub File Size: 8.79 Mb
ISBN: 582-4-59613-406-8
Downloads: 8826
Price: Free* [*Free Regsitration Required]
Uploader: Togore

And the allowale stresses can be different which different codes. To order click here. AND it does not explain why his allowables don’t jive.

Key Contacts Becht Info Request. Subscribe to this blog post Unsubscribe. Bellows pitch and height tolerances were redefined relative to diameter.

You will receive free of charge a detailed bellows design calculation for each expansion joint you are interested in.

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

Expansion Joint Manufacturers Association

Testing A large contributor to the knowledge base at American BOA has been the capability to perform in-house testing in our state of the art on-site test lab. Single Bellows Axial Vibration Constants were revised.

The calculation of universal type Expansion Joints has been simplified by a modified equation for the axial movement per convolution. Fitness for Service 9 post s.

Utilizing this program, we can easily perform all of the analyses noted above utilizing over 35 different materials including:. Perhaps there was confusion over which code was applicable. Why was the EJMA stresses higher? The distinction of thin versus thick bellows has been added.


Response to Stress Question. This Guide is not intended as a source for expansion joint design or application details. Available Positions Apply On-line. Friday, 26 July The main and most important result was that the calculated bending stress due to deflection could be considerably reduced. Sa is the allowable stress from the applicable code. Becht Software 4 post s. Heavy Lift 14 post s. Machinery 19 post s.

A new E-book version of the new 10th Edition Standards can be downloaded to your PC, laptop or tablet. In addition to performing analysis on bellows elements, American BOA’s Engineering Staff routinely performs calculations on the load restraining hardware normally associated with expansion joints.

The Guide is intended to provide users with a basic understanding of expansion joints. 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.

Expansion Joint Engineering Innovation. What is Bellows Pressure Thrust?

The latter provides a significantly higher cycle life. Due Diligence 6 post s. This ensures your customized solution is not only ejmma safe but produced in a time frame that was previously not possible.

Historically, designers have put large factors of safety on the number of design cycles for bellows, which was in part justified since there was no design margin in the EJMA fatigue curve. Was he fudging the first time?

Multiple Choices

Litigation Support 3 post s. A sample of this analysis is shown below: 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.


The design would be EJMA. Process Consulting 10 post s. This includes standard conversions in addition to constants used in calculations. Ejma uses Sym yield strength at room from cert not tensile. If a bellows can be manufactured from the material, we can easily add it to the database to perform your analysis.

Materials Degradation and Corrosion standxrd post s. Can this be true? High Frequency Fatigue with Thermal Exposure.

The Tenth Edition standards combine the knowledge and experience of the leading manufacturers of expansion joints into an invaluable reference document. Bellows vendors will often quote two different cycle lives fdee their bellows.

Metal Expansion Joint Engineering

Austenitic Stainless Steels Duplex Stainless Steels Nickel Alloys Copper Alloys Aluminum Titanium 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. We have the technical expertise to assist customers for the most common applications and the tools in place to aid with selection.

I cannot imagine that for simple applications the bellow tube Always has to be x-rayed or DPI tested. Per Sgandard I need the allowable at design to check rjma calculated stresses. Definitions in the Nomenclature section 1. Is this a standard requirement for all types of application of expansion joints, or can this be a demand of a customer. Piping 29 post s.