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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American BOA uses a combination of 3D modeling software along with finite element analysis FEA to determine the correct hardware for your design conditions.
The distinction of thin versus thick bellows has been added. 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. 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.
There is ongoing work to potentially revise the EJMA fatigue curve to include a factor of safety, which may be variable. Subscribe to this blog post Unsubscribe.
The Difference Between ASME B31.3 Appendix X and EJMA Fatigue Curves for Bellows?
And the allowale stresses can be different which different codes. Bellows pitch and height tolerances were redefined relative to diameter.
Heavy Lift 14 post s. This ensures your customized solution is not only fail safe but produced in a time frame that was previously not possible. Project 2 post s.
American BOA is often requested to aid customers in the proper selection of expansion joints for their particular system. We have the technical expertise to assist customers for the most common applications and the tools in place to aid with selection. Was he fudging the first time? The main and most important result was that the calculated bending stress due to deflection could be considerably reduced. Subscribe to our blog Unsubscribe from our blog. Some common tests include the following:.
This Guide is not intended as a source for expansion joint design or application details. He has more than 30 years of experience in design, design review, analysis, check-out, mechanical integrity, development, troubleshooting, and failure analysis.
Safety 10 post s.
Pressure Vessels 18 post s. They seemed too high.
Utilizing this program, we can easily perform all of the analyses noted above utilizing over 35 different materials including:. Standaed Joint Engineering Innovation. Fatigue life calculations were greatly enhanced and simplified.
The Sa he gave me, for 70F and F were and respectfully.
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 EJMA bellows fatigue curve is a best fit curve based on data syandard was available, so it provides an expected average cycle life.
Key Contacts Becht Info Request. 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.
The Guide is intended to provide users with a basic understanding of expansion joints. Is this a standard requirement for all types of application of expansion joints, or can this be a demand of a customer. The latter provides a significantly higher cycle life.
In addition to utilizing this lab to further our own knowledge of expansion joints, it can be utilized for customer specific expansion joint testing.
Expansion Joint Manufacturers Association – Wikipedia
Sa is the allowable stress from the applicable code. Hi, I have a question about the examination in Appendix Fitness for Service 9 post s. Click to Request Info. The software utilized for solid standars and FEA work in conjunction with each other to allow the shortest possible time from concept model to production drawing generation.
Process Consulting 10 post s. EJMA does not mention this. He is President of Becht Stadard Co.