Session: DA-02-02 Design and Analysis of Piping Components-2

Paper Number: 122803

122803 - Stress Analysis of Explosion-Welded Stainless Steel to Aluminum Cryogenic Transition Joints 

Transition joints are commonly used to connect components built from two dissimilar metals. In cryogenic applications, aluminum to stainless steel transition joints are often used to connect aluminum vessels and heat exchangers to stainless steel piping. Such transition joints have been built using different technologies. This paper shall examine transition joints which are fabricated using the explosion welding process, and how various parameters of the transition joint design impact the internal stresses developed under various loading conditions.

All piping transition joints must be designed to accommodate stresses due to pressure and other piping loads and forces. For transition joints made from dissimilar metals of different coefficients of thermal expansion, stresses due to the thermal contraction or expansion differences at the junction must also be considered. Explosion-welded stainless steel to aluminum cryogenic transition joints typically utilize multiple intermediate material layers for better bonding and to accommodate the differential thermal expansion/contraction between the aluminum and stainless steel outer layers.ASME PVP2023-105205 paper discusses the qualification methods and requirements for explosion-welded parent plate and transition joint design. This paper will focus on differential thermal expansion/contraction and its impact on transition joint design. Finite Element Analysis (FEA) is used to understand the effect of the joint geometry and material composition on internal stresses due to the combination of pressure, piping loads, and differential thermal expansion/contraction within the joint.

Presenting Author: Ali Ok Air Products and Chemicals

Presenting Author Biography: Mr. Ok is Lead Mechanical Design Engineer for LNG Technology and Products group. He is responsible for developing and leading the mechanical component design and implementation associated with the manufacturing of Coil Wound Heat Exchangers. He has a B.S. in Mechanical Engineering from Istanbul Technical University, M.S in Mechanical Engineering from Bogazici University and M.S in Aerospace Engineering and Engineering Mechanics from the University of Texas at Austin. He has more than 15 years of industrial experience, the last 4 of which have been with the Air Products LNG Team. Prior joining to Air Products he worked at GE Healthcare Magnet and Gradient Coil Excellence Center. He has wide-ranging industry experience in oil and gas (upstream and downstream) and healthcare industries. He is a licensed professional engineer in Texas.

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