Who We Are

Our Goals

  • To be the authority for the expansion joint industry providing global leadership on all technical issues impacting the industry, particularly focusing on best practices and safety.
  • Combine the knowledge and experience of the association’s Technical Committee and provide assistance to users, designers, and others in the selection and application of expansion joints for safe and reliable piping and vessel installation.
  • Publish our knowledge
  • Promote development opportunities for the expansion joint industry and promote expansion joint industry to the world at large

Who We Are

The Expansion Joint Manufacturers Association, Inc. is an organization of established manufacturers of metal bellows type expansion joints. We have members located across the globe.

What We Do

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.

Our Publications

Since 1958, when the Expansion Joint Manufacturer’s Association (EJMA®) first published these Standards, continuing technological improvements in the application and design of Expansion Joints have been reported through the cooperative efforts of its association members by expanding the scope and content of this publication.

The first EJMA® Standard edition was, of necessity, somewhat brief and covered only applications involving axial movement. But as research and extensive testing results were catalogued, more detailed design data has been included in the EJMA® Standard. The EJMA® Standards are intended for application to metallic 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 the bellows attachment welds.