Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Institute of Gas
Journal Basic Information
Journal DOI :
The Korean Institute of GAS
Editor in Chief :
Volume & Issues
Volume 9, Issue 4 - Dec 2005
Volume 9, Issue 3 - Sep 2005
Volume 9, Issue 2 - Jun 2005
Volume 9, Issue 1 - Mar 2005
Selecting the target year
Wavelet Analysis of Elastic Wave for Wall Thinned High-Pressure Service Pipes
Kim, Jin-Wook ; Ahn, Seok-Hwan ; Lee, Si-Yoon ; Nam, Ki-Woo ; Do, Jae-Yoon ;
Journal of the Korean Institute of Gas, volume 9, issue 3, 2005, Pages 1~8
We studied on the nondestructive evaluation of the elastic wave signals of locally wall thinned straight pipe. Wavelet transform was applied for the time-frequency analysis of waveforms obtained by fracture wave detector due to the dropping steel ball. The time-frequency analysis provides time variation of each frequency component involved in a waveform, which makes it possible to evaluate the shape of local wall thinning at each frequency. In this study, comparison by wavelet transform of the AE signals and monotonic bending tests without internal pressure are conducted on 1.91 inch diameter full-scale carbon steel pipe specimens. As the results of tests, fracture behaviors could be shown by the characteristic of mechanical strength of locally wall thinned pipes and the waveforms could be evaluated for the integrity insurance of the piping system according to the length and depth range of the deffeted shape pipes in the real field.
A Study on the Hazard of Converted Gas for Surface Heating Treatment
Choi Jae-Wook ; Min Wong-Chul ; Lim Woo-Sub ; Lee Byoung-Chul ; Kim Dong-Kyu ;
Journal of the Korean Institute of Gas, volume 9, issue 3, 2005, Pages 9~14
To estimate the explosion characteristics of converted gas, the study was examined into effects of altering oxygen concentration and adding hydrogen. From the result of the experiment, as the concentration of converted gas and hydrogen were increased at
oxygen concentration, the lower explosion limit was low. Minimum explosion oxygen concentration was
. Maximum explosion pressure of converted gas was
, now Maximum explosion pressure rising velocity was
at converted gas concentration
. Also, minimum ignition energy was 0.13 mJ at converted gas concentration
The Loss Control Management System for Continuous Improvement of the Petrochemical Industries
Ko Jae Wook ; Lim Dong Ho ; Yoo Jin Hwan ;
Journal of the Korean Institute of Gas, volume 9, issue 3, 2005, Pages 15~20
Recently, Environmental and Safety Management is approaching in order to reduce the loss cost of accidents in effect, efficiency, excellency. In the side that is a large production enemy of the industrialization times, Most companies are focused on decreasing the loss that can let their companies grow healthily than a productivity improvement. The this study analyzed a matter asked f3r basic requirements and continuous development of ISO14001, OHSAS18001, PSM, Responsible Care operating in petro-chemical industries basically, and developed a LCMCI(the Loss Control Management system for Continuous Improvement of the Petro-chemical Industries) fer continuous development of petro-chemical companies in order to be able to continuously manage a loss.
Prediction and Measurement of Flash Point and Fire Point of Aromatic Hydrocarbons
Ha Dong-Myeong ; Han Jong-Geun ;
Journal of the Korean Institute of Gas, volume 9, issue 3, 2005, Pages 21~26
The flash points and the fire points are one of the most important combustible properties used to determine the potential for the fire and explosion hazards of flammable substances. In this study, the flash points of aromatic hydrocarbons, were measured by using Pensky-Martens Closed Cup apparatus(ASTM-D93) and Tag Open-Cup apparatus(ASTM D 1310-86). Also the fire points of aromatic hydrocarbons, were measured by using Tag Open-Cup apparatus. The measured flash points were in good agreement with reference values. The measured fire points compared with the estimated values based on 1.23 times stoichiometric concentration. The values calculated by the proposed equation were in agreement with measured values.
The Measurement of Real Deformation Behavior in Pilot LNG Storage Tank Membrane
Kim Y.K. ; Yoon I.S. ; Oh B.T. ; Rong S.H. ; Yang Y.M. ; Kim J.K. ;
Journal of the Korean Institute of Gas, volume 9, issue 3, 2005, Pages 27~31
The membrane to be applied inside of the LNG storage tank is provided with corrugations to absorb thermal contraction and expansion caused by LNG temperature and pressure changes. It is very important to measure their thermal strains under LNG temperature by analytical and experimental stress analysis of the membrane. We have developed a stress measurement system using strain gages and measured the strain during cooldown and storing the LNG. We also analyzed the measured data by comparison with the FEM data.
A Study on Swaging Characteristics of Band for Low Pressure Hose
Kim Tyoung-Gyu ; Kim Pil-Jong ; Cho Seok-Beom ; Kwon Boo-Kil ;
Journal of the Korean Institute of Gas, volume 9, issue 3, 2005, Pages 32~37
Hose bands, which are used in LPG (Liquefied Petroleum Gas) or LNG (Liquefied Natural Gas) facilities for home use to join low pressure hoses with fuse-cocks (or regulators), should give a tight connection to prevent a gas leakage from hose connection parts. In this paper, hydraulic pressure tests and pull force tests were carried out to evaluate the performance and swaging length of hose bands. Experimental results showed that the swaging force of ear type bands were higher than those of spring bands and also showed that the optimal swaging length was about 1
2 mm from the hose end.
A Study of Early Warning System for Gas Facilities
Lee Jeong Woo ; Yoo Jin Hwan ; Ko Jae Wook ;
Journal of the Korean Institute of Gas, volume 9, issue 3, 2005, Pages 38~43
There is monitored amount operation variables and controlled by operating conditions and loads at many facilities using gas also chemical plants. The process fault which can be indicated by operators, is occurred when the abnormal state was accumulated continuously owing to physical failure, external disturbance or human error. This is studied a Early Warning System which is to estimate process status by real-time monitoring operation variables and to early warning before it will be occurred process fault.
Evaluation of Service Life of Low Pressure LP-Gas Regulators for Home Use
Kim Young-Gyu ; Kim Pil-Jong ; Cho Seok-Beom ; Kwon Boo-Kil ;
Journal of the Korean Institute of Gas, volume 9, issue 3, 2005, Pages 44~48
Experimental works were carried out to evaluate the service life of low pressure LPG regulators for domestic use. Experimental results showed that the operating pressure of regulators used for 7 years notably deviated from the standard value of the adjusting pressure and the lock-up pressure. Thus, it is estimated that low pressure LPG regulators have approximately 6 years of service life.
Calibration of High Pressure Vibrating Tube Densimeter
Kim Hwayong ; Oh Kyoung Shil ; Bae Won ;
Journal of the Korean Institute of Gas, volume 9, issue 3, 2005, Pages 49~54
This work was to calibrate Anton Paar 512P vibrating tube densimeter which is a special type for density measurement under high pressure (up to 70 MPa) and temperature (up to 420 K) and checked the validity of the new apparatus. Calibration was peformed with water, nitrogen and water, vacuum as reference fluids. Temperature is measured from 313.15 K and 353.15 K at 10 K intervals, and pressure is measured up to 30 MPa at 5 MPa intervals, respectively. To check the validity of new apparatus and the calibration method we compared the values obtained by measuring density of carbon dioxide with those given by NIST Thermophysical Properties of Pure Fluids Database. The average deviations between the NIST and the experimental data were
with water and nitrogen as reference fluids.