Expansion Joint Manufacturers Association

The Expansion Joint Manufacturers Association (EJMA) 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]

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.

Members

The current members that are a part of the Expansion Joint Manufacturers Association include:

• AEROSUN-TOLA Expansion Joint Co. Ltd.
• Badger Industries, Inc.
• Belman A/S
• EagleBurgmann KE A/S
• Emiflex S.p.A
• Hyspan Precision Products, Inc.
• MACOGA, S.A ^[5]
• Microflex, Inc.
• Senior Flexonics Pathway
• Teadit Juntas Ltda.
• Teddington Engineered Solutions Ltd.
• UnisonHKR Co., Ltd. (South Korea) ^[6]
• US Bellows, Inc.^[7]
• Witzenmann GmbH, Inc.^[8]