scholarly journals Development of Low Frequency High Temperature Ultrasonic Transducers for In-service Monitoring of Pipework in Power Plants

2016 ◽  
Vol 168 ◽  
pp. 983-986 ◽  
Author(s):  
A. Dhutti ◽  
S.A. Tumin ◽  
A. Mohimi ◽  
M. Kostan ◽  
T.H. Gan ◽  
...  
Keyword(s):  
High Temperature ◽  
Power Plants ◽  
Low Frequency ◽  
Ultrasonic Transducers ◽  
Service Monitoring

Comparison of the Limit Loads Between Defected Pressure Pipes With an Internal Pit and an External Pit at High Temperature

2013 ◽  
Author(s):  
Changyu Zhou ◽  
Bo Wang ◽  
Zhigang Sun ◽  
Jilin Xue ◽  
Xiaohua He
Keyword(s):  
High Temperature ◽  
Power Plants ◽  
Structural Integrity ◽  
Load Condition ◽  
Relative Length ◽  
Limit Load ◽  
Relative Depth ◽  
Corrosive Media ◽  
Pressure Pipe ◽  
Pressure Pipes

High temperature pressure pipes are widely used in power stations, nuclear power plants, and petroleum refinery, which always bear combined effects of high temperature, high pressure, and corrosive media, so the local pits are the most common volume defects in pressure pipe. Due to various reasons, the defects usually appear on the internal or external wall of pipe. In this paper, the dimensions of a defect were characterized as three dimensionless factors: relative depth, relative gradient and relative length. The main objects of study were the pipe with an internal pit and pipe with an external pit. Orthogonal array testing of three factors at four different levels was applied to analyze the sequence of the influence of three parameters. In present study, when the maximum principal strain nearby the location of the defects reaches 2%, the corresponding load is defined as the limit load, which is classified as two kinds of load type: limit pressure and limit bending moment. According to this strain criterion and isochronous stress strain data of P91 steel, the limit load of high temperature pipe with a local pit was determined by using ABAQUS. And in the same load condition of the pipe with the same dimensionless factors, the limit load of the internal defected pipe was compared with that of the external defected pipe. The results of this study can provide a reference for safety assessment and structural integrity analysis of high temperature creep pressure pipe with pit defects.

Application of Catalytic Technologies for Power Plants Based on High-Temperature Fuel Cells

2021 ◽  
Vol 29 (3) ◽  
pp. 326-333
Author(s):  
M. A. KERZHENTSEV ◽  
O. YU. PODYACHEVA ◽  
N. V. SHIKINA ◽  
S. V. MISHANIN ◽  
Z. R. ISMAGILOV ◽  
...  
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Power Plants

High Temperature Durability Improvement of PbTiO3/ Pb(Zr,Ti)O3 Ultrasonic Transducers

2021 ◽  
Author(s):  
Kohei Hirakawa ◽  
Makie Hidaka ◽  
Naoki Kambayashi ◽  
Makiko Kobayashi
Keyword(s):  
High Temperature ◽  
Ultrasonic Transducers
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