|
Abstract: The
bimetallic CRA-lined pipe, which has an inner layer made of a very
resistant CRA and an outer layer made of low-cost steel, is utilized in
oil production, in nuclear power plants and in refining industry
increasingly. A new kind of hydraulic expansion device of manufacturing
bimetallic CRA-lined pipe is researched and developed. Based on the
elasticity-plasticity theory, the stress and strain of the inner and
outer pipe are analyzed theoretically during hydro-forming expansion
process. By using deformation condition of compatibility the calculating
formulas related hydro-forming pressure to the residual contact pressure
between inner and outer pipe is derived. The theoretical analysis is
verified by experimental results.
Key words: CRA-lined
pipe Hydraulic expansion Self-energizing seal Residual contact
pressure
CLC No: TH123.3
国家“九五”科技攻关资助项目(96-918-02-03).
Received 200303310, received in revised form 20030528
|