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Wang Xuesheng
Li Peining
School of Mechanical and
Power Engineering,
East China University of Science
and Technology,
Shanghai 200237, China
Wang Ruzhu
School of Mechanical and
Power
Engineering,
Shanghai Jiaotong University,
Shanghai 200030, China |
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HYDROFORMING OF BIMETALLIC
LINED PIPE*
Abstract: A new hydroforming process for manufacturing corrosion-resistant-alloy (CRA)-lined pipe is proposed to overcome the disadvantages in existing technologies, and a new kind of hydraulic expansion device for bimetallic CRA-lined pipe has been researched and developed. Its operational principal and technical characteristic is also introduced. The stress and strain in the liner and outer pipe during the hydroforming process have been analyzed and the mechanism of hydraulic expansion method is studied theoretically. The final forming pressure formula is suggested and the theoretical analysis is verified by experimental investigation. The results indicate that the new technology is feasible and can be applied in industrial production.
Key words:
Corrosion-resistant-alloy (CRA)-lined pipe Hydroforming
Residual contact pressure Strain
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