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 and reliable piping and vessel installation. The Tenth Edition standards combine the knowledge and experience of the leading manufacturers of expansion joints into an invaluable reference document.

The Expansion Joint Manufacturers Association is an organization of metal bellows expansion joint manufacturers. It was founded in 1955 to create and maintain a set of standards for quality expansion joint design and manufacturing.[1] The EJMA standards are used worldwide as a reference for the proper selection and application of metallic bellows expansion joints. The standards are a combination of a variety of expansion joint manufacturers' knowledge and experience.[2][3]

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The EJMA organization performs extensive technical research on a variety of topics concerning the design and manufacturing of expansion joints.[4] This knowledge contributes to providing new versions of the EJMA book of standards.

Hi,

I have a question about the examination in Appendix 302.2.2.

The minimum control requirement of the bellow tube has to be X-ray or DPI prior to forming.

Is this a standard requirement for all types of application of expansion joints, or can this be a demand of a customer. I cannot imagine that for simple applications the bellow tube Always has to be x-rayed or DPI tested. EJMA does not mention this.

The rogue Appendix 26 group came up with a curve that dropped below all points. Pipe loops are not held to this high of a standard. How did they get this dramatic of a change past the powerful expansion joint lobbyists in Washington? How indeed.

CLIENT ISSUES

The client needed six replacement expansion joints for a piping system where the media was hydrocarbon, an organic compound consisting entirely of hydrogen and carbon. The existing Expansion Bellows had reached the end of their service life, and the client needed a supplier that could offer them the same design solution but designed to meet the latest EJMA standard.

It was founded in 1955 to establish and maintain 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 the safe and reliable installation of pipes and containers.

Since 1958, when the EJMA first published these standards, continuous technological improvements in the application and design of Expansion Joints have been reported through the cooperative efforts of their association members in expanding the scope and content of this standard publication. The first edition of the EJMA standard was, by necessity, somewhat brief and covered only applications involving axial motion. But as the results of extensive research and testing were catalogued, more detailed design data was included in the EJMA standard.

The standards are designed to apply to metal bellows expansion joints having only the convolution shapes shown in the standards and having convolution welds only in the meridional direction with the exception of bellows joint welds.

EJMA standards are recognized throughout the world as the authority on the proper selection and application of metal bellows type expansion joints for the safe and reliable installation of pipes and vessels. The 10th edition standards combine the knowledge and experience of the leading expansion joint manufacturers in one invaluable reference document.

With each printed copy of the tenth edition, EJMA adds an EJMA Practical Guide to Expansion Joints, a pocket guide based on the EJMA standards that is intended to provide users with a basic understanding of expansion joints and help the user to communicate design requirements to manufacturers and to properly install and maintain the expansion joint in service.

In cases where the bellows integrity under pressure is not validated by the results of the design calculations using EJMA standards and the geometric complexity indicates the need for further optimization of the project, Giorgi Engineering can verify the integrity of the product with finite element analysis (FEA), using ANSYS software.

The technical approval and the results of the analysis obtained in accordance with the terms of the specified design standard are provided as a technical documentation package, complete with valuation reports.

The reports can be sent separately or supplied with the bellows, allowing the client to reduce facility downtime to the minimum before the installation.

This rapidity in supplying the documentation ensures that at the time of the offer the client already has all the technical details necessary to make an informed evaluation of the proposed standard and personalized solutions, such as the project specifics, Industry 4.0, and the project code.

Build-to-print is typical for this industry. Replacements and reverse-engineered solutions are commonly provided. New designs can comply with EJMA standards if required. Our customer base is extensive, including LIGO, NIF, CERN, and many laboratories.

Hyspan is an ISO 9001:2015 registered company with a quality system that supports requirements of the piping and boiler pressure vessel codes. These include popular ASME B31.1, ASME B31.3, and ASME Section VIII Division 1 codes. European Pressure Equipment Directive (PED) standards, with CE markings, can be supported in many applications. Canadian Registration Number (CRN) support is available.

Nondestructive testing and inspections are performed by company personnel including radiography. Quality personnel are certified to the standards of the American Society of Nondestructive Testing (ASNT). Hyspan is a member of the Expansion Joint Manufacturers Association (EJMA ). A copy of our Hyspan EJMA  certificate is available.

The modern skyscraper has been around for over a century. Like other elements of our built environment, the skyscraper can only exist because of other innovations in building technology, namely steel frame construction and safe elevators. Even though we have figured out how to build strong, tall structures and safely move the people inside, there are still the challenges of heating and cooling the building, moving fresh water in and dirty water out, providing fire protection and electricity. Defying gravity adds another twist to the challenges of providing services within tall buildings. This article will introduce some basics of pipe riser design and performance, explain some considerations in using different expansion joints in pipe risers, and briefly describe some of the codes and standards regarding guiding and supporting risers.

The study aims at determining the actual standards of arterial blood pressure in adolescents (the unimode reading) and initial evaluation of risk of hypertension. Survey was carried out on sample of 2214 adolescents aged between 15 and 18, (1st and 2nd grade), BP was measured by medical staff (ununiformed) in the school medical office, between morning and noon, assuming group V auscultation as the measure of diastolic BP. Height, body mass and pulse rate was examined; students were asked to answer the questionnaire. Average values of systolic BP of 124.7 (+/- 14) mm Hg, diastolic BP of 73.1 (+/- 8.7) mm Hg, pulse 79.2 per minute, so called double product 9987. Searching for the criterion of hypertension, level of 95 percentiles amounted to: systolic BP of 148 mm Hg (145 in girls, 152 in boys), diastolic BP of 88 mm Hg (equal in both sexes). 162 subjects went beyond the level (7.3% of population): systolic BP of 106 (4.8% of students), diastolic BP of 81 (3.7%); 25 subjects (1.1%) exceeded both values. 0852c4b9a8

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