• CN: 11-2187/TH
  • ISSN: 0577-6686

›› 2004, Vol. 40 ›› Issue (5): 72-76.

• Article • Previous Articles     Next Articles

RESEARCH ON HYDRAULIC EXPANSION PROCESS OF MANUFACTURING BIMETALLIC CRA-LINED PIPE WITH SELF-ENERGIZING SEAL

Wang Xuesheng;Wang Ruzhu;Li Peining   

  1. School of Mechanical and Power Engineering, Shanghai Jiaotong University School of Mechanical Engineering, East China University of Science and Technology
  • Published:2004-05-15

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, Residual contact pressure, Self-energizing seal, Constitutive equation, High temperature and high pressure water, Slow strain rate, Stress corrosion, Forged 316L stainless steel

CLC Number: