Theoretical analysis and numerical simulation on the hydarullic expansion of double-layered tubes.pdf

Proceedings of PVP2008
2008 ASME Pressure Vessels and Piping Division Conference
July 27-31, 2008, Chicago, Illinois, USA
PVP2008-61506
THEORETICAL ANALYSIS AND NUMERICAL SIMULATION
ON THE HYDARULLIC EXPANSION OF DOUBLE-LAYERED TUBES
Fujun Liu*1, Jinyang Zheng2, Shoubao Ding1, Xiaolian Guo1
(1. Zhejiang Provincial Special Equipment Inspection and Research Institute, Hangzhou, P. R. China;
2. Zhejiang University, Hangzhou, P. R. China;)
* Corresponding author, Phone: +86-571-860-26-412; Fax: +86-571-860-26-412; E-mail: lfj_dq@

the 1980’s and it was applied to situations of severe corrosion
ABSTRACT in order to reduce costs mostly at that time. For example,
replacing a stainless steel tube with a double-layered tube with
a carbon steel inner tube packaged by a stainless steel outer
The quality of hydro-expanded double-layered tubes depends tube is used for sea floor piping; a double-layered tube of
on the hydro-expanding pressure. Therefore, it is very stainless steel inner tube packaged by a carbon steel outer tube
important to determine the range of the hydro-expanding is used for the transportation of corrosive media [1]. These
pressure accurately during the fabrication of double-layer tubes. could prolong life and save material cost. Compared with a
According to theories of elasticity and plasticity, the responses single-laye