The Expansion Joint Manufacturers Association is an organization of established manufacturers of metal bellows type expansion joints. 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. EJMA carries out extensive technical research and testing on many important aspects of expansion joint design and manufacturing. EJMA 10th Edition is the most current edition and supersedes all previous publications.

Expansion Joint Design Software. For austenitic bellows elements designer has option to use his own fatigue test results, EJMA round bellows published values. Nov 12, 2017 - Apr 25, 2017 Looking for EJMA designing software for expansion bellows. Can anybody help me.!!!!! Ejma Bellows Software. EJMA carries out extensive technical research and testing on many important aspects of expansion joint design and manufacturing. Flexpert Bellows Pvt Ltd established in 1992,.

Triad Bellows Design and Manufacturing uses bellows design software based on EJMA 10th edition guidelines. Cd: The factor read from the EJMA Figure C26 (or ASME VIII) for the listed curve number and x value. It is used in specific design calculations to relate U-shaped bellows convolution segment behavior to a simple strip beam.

Cf: The factor read from the EJMA Figure C25 (or ASME VIII) for the listed curve number and x value. It is used in specific design calculations to relate U-shaped bellows convolution segment behavior to a simple strip beam. Cp: The factor read from the EJMA Figure C26 (or ASME VIII) for the listed curve number and x value. It is used in specific design calculations to relate U-shaped bellows convolution segment behavior to a simple strip beam. S1: Bellows tangent circumferential membrane stress due to internal pressure. In case of external pressure the reinforcing effect of a possible external collar is excluded. S1: Collar circumferential membrane stress due to internal pressure.

In case of external pressure the reinforcing effect of a possible external collar is excluded. Ni License Activator on this page. S2: Bellows circumferential membrane stress due to pressure. S3: Bellows meridional membrane stress due to pressure. S4: Bellows meridional bending stress due to pressure.

S5: Bellows meridional membrane stress due to deflection. S6: Bellows meridional bending stress due to deflection. Rated Max Axial: The maximum amount of movement (axial extension, axial compression, lateral deflection, angular rotation, or any combination thereof) which an Expansion Joint is capable of absorbing.

This rating may be different for each size, type and make of Expansion Joint and is established by the manufacturer. Total Equivalent Max Axial: Bellows are rated by the manufacturer in terms of maximum allowable axial displacement per convolution, ec and ee.

The design of every Expansion Joint must be such that the total displacement per convolution from all sources does not exceed the rated values. Bellows Allowed Stress: Allowable material stress at design temperature, unless otherwise specified, from the applicable code. Bellows E at Temperature: Modulus of Elasticity at design temperature, unless otherwise specified, for material. Bellows Yield at Temp: Yield strength at design temperature, unless otherwise determined, of bellows material after completion of bellows forming and any applicable heat treatment. Axial Working Spring Rate: In order to evaluate the loads upon piping, supports, or equipment, it is necessary to determine the axial forces and moments required to move an Expansion Joint. The bellows resistance factor or working spring rate is shown in lbs per inch of compression or extension. Lateral Working Spring Rate: In order to evaluate the loads upon piping, supports, or equipment, it is necessary to determine the lateral forces and moments required to move an Expansion Joint.