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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Institute of Gas
Journal Basic Information
Journal DOI :
The Korean Institute of GAS
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Volume & Issues
Volume 10, Issue 4 - Dec 2006
Volume 10, Issue 3 - Sep 2006
Volume 10, Issue 2 - Jun 2006
Volume 10, Issue 1 - Mar 2006
Selecting the target year
Analysis of Likelihood of Failure for the Brittle Fracture through Quantitative Risk Based Inspection using API-581
Kim Tae-Ok ; Lee Hern-Chang ; Jang Seo-Il ;
Journal of the Korean Institute of Gas, volume 10, issue 1, 2006, Pages 1~6
To use pressurized facilities safely and effectively, a likelihood of failure (LOF) for the brittle fracture was analyzed quantitatively through the risk based inspection using API-581 BRD. We found that for the case of the low temperature/low toughness and the temper embrittlement, the technical module subfactor (TMSF) showed high value for the A impact curve, low temperature, and the no post weld heat treatment. But the risk didn't significantly change at the
embrittlement, and the LOF far the sigma phase embrittlement showed high value at low temperature of the high sigma.
A Study on the Prediction of the Maximum Evaporation Rates from LPG Storage Tanks
Lee Kyung-Sik ; Yu Kwang-Soo ; Jo Young-Do ; Park Kyo-Shik ;
Journal of the Korean Institute of Gas, volume 10, issue 1, 2006, Pages 7~12
The quantity of gas which can be supplied by LPG storage tank become a standard of selection. In the absence of the maximum evaporation rates from LPG storage tanks by tank capacity, continuation using time, air temperature, it is in a problem for the dissemination of LPG Storage tanks. In this paper, we showed the maximum evaporation rates from LPG storage tanks by tank capacity, air temperature, continuous using time and remaining level.
Equipment Reliability Database for Chemical Plants
Ko Jae-Wook ; Kwon Hyuk-Myun ;
Journal of the Korean Institute of Gas, volume 10, issue 1, 2006, Pages 13~18
Chemical plants should perform Quantitative Risk Assessment that evaluates types of accident, frequency and damage which can happen through using the hazardous equipment and the hazardous materials for preventing and preparing industrial disasters. It is necessary that Chemical plants should include the reliability database which efficiently evaluate the Quantitative Risk Assessment. So in this study, we suggest a which methodology applies Quantitative Risk Assessment on the basis of the constructed data to imply the reliability of industrial facilities and equipment, collection of reliability data, system analysis and development of software.
Prediction of Explosion Limit of Flammable Mixture by Using the Heat of Combustion
Ha Dong-Myeong ;
Journal of the Korean Institute of Gas, volume 10, issue 1, 2006, Pages 19~25
Explosion limit is one of the major physical properties used to determine the fire and explosion hazards of the flammable substances. Explosion limits are used to classify flammable materials according to their relative flammability. Such a classification is important for the safe handling, storage, transportation of flammable substances. In this study, the lower explosion limits(LEL) of the flammable mixtures predicted with the appropriate use of the vapor composition and the heat of combustion of the individual components which constitute mixture. The values calculated by the proposed equations were a good agreement with literature data within a few percent. From a given results, It is to be hoped that this methodology will contribute to the estimation of the explosive properties of flammable mixtures with improved accuracy and the broader application for other flammable substances.
Availability Analysis of Safety Devices installed for Preventing Accidental Event in the LPG Refuelling Station
Lee Jin-Han ; Yu Kwang-Soo ; Park Kyo-Shik ;
Journal of the Korean Institute of Gas, volume 10, issue 1, 2006, Pages 26~31
For the purpose of evaluating the availability of manifold safety devices installed in the LPG(Liquefied Petroleum Gas) refuelling stations, the quantitative analysis of the frequency on BLEVE(Boiling Liquid Expanding Vapor Explosion) scenario was performed. The amount of frequency reduction was the way of assessing safety devices availability. In this analysis, we could find out what sorts of safety devices are essential to satisfy acceptable social risk criteria and are prioritized to install in the future.
Development of Damage Mechanism Information System for Equipments in Refinery Industry
Choi J.W. ; Seo J.M. ; Choi S.C. ; Yoon K.B. ;
Journal of the Korean Institute of Gas, volume 10, issue 1, 2006, Pages 32~37
Major components of refinery plants are exposed to various damage mechanisms depending on the operation condition, material selection and kinds of internal fluid. Inspection techniques and damage monitoring methods should be selected considering the damage mechanisms of the components. Hence, it is quite necessary to have an information system with a standardized database on the various damage mechanisms. In this study a damage information system with contents on the damage mechanisms included in API 571 code was developed. Concept of the screening table employed in USA and Japan was also adopted to identify the probable damage mechanisms from the information on operating temperature, internal fluid, metal used for the component and stress condition. This system can be used before the risk based inspection planning to identify key damage mechanisms involved.
A Study on the Simulation of LPG Refrigeration Cylcle Using Pure Propane Refrigerant
Cho Jung-Ho ;
Journal of the Korean Institute of Gas, volume 10, issue 1, 2006, Pages 38~42
In this study, a simulation technology for refrigeration cycle which can liquefy and store liquified petroleum gas (LPG) using pure propane as a refrigerant has been introduced. Cooling water as the second cooling medium was used for the liquefaction of propane. Peng-Robinson equation of state was used for the entire refrigeration cycle. A new alpha formulation proposed by Twu et al. was used for the more accurate prediction of vapor pressures of pure propane component and LPG constituents. API method for the accurate estimation of liquid densities of propane and LPG was used instead of using Peng-Robinson equation of state. PRO/II with PROVISION release 7.1, a general purpose chemical process simulator was used for the simulation of the overall refrigeration system. Through this work, we can successfully simulate the real propane refrigeration plant operating at domestic site.
The Study on the Hydrogen Embrittlement of ferrite Stainless Steel with Welding Conditions and Current Density
Choi Byung-Il ; Lim Uh-Joh ;
Journal of the Korean Institute of Gas, volume 10, issue 1, 2006, Pages 43~47
This study attempted to examine how the hydrogen embrittlement susceptibility of the STS 444 stainless steel varies under different welding conditions and how its effect on hydrogen embrittlement differs by the impressed current density levels. For doing so, U bend test specimens was used to impress the current density at 5,10, 15, and 20
solution with an electrochemical corrosion tester. The hydrogen embrittlement was assessed by observing the time to failure, and then the microphotographs of metal structures were compared to investigate the metal- related structural properties. The study findings suggest that the effect on hydrogen embrittlement for the STS 444 steel significantly depends on both the welding conditions, or variations in the amount of shield gas, and the levels of current density. In particular, as the impressed current density increases, the hydrogen embrittlement increases rapidly.
Study on Prediction System Construction of Fire.Explosion Accident by NG & LPG among Domestic Gas Accidents
Ko Jae-Sun ; Kim Hyo ;
Journal of the Korean Institute of Gas, volume 10, issue 1, 2006, Pages 48~55
In order to establish the comprehensively, quantitatively predictable program to the fire and explosion accidents in the urban gas system, and to set up domestic criteria of societal risk, the collected urban gas accident data have been deeply analyzed. The Poisson probability distribution functions with t=5 for the database of the gas accidents in recent 11 year shows that 'careless work-explosion-pipeline' item has the lowest frequency, whereas 'joint loosening & erosion-release-pipeline' item has the highest frequency. And thus the proper counteractions must be carried out. The further works requires setting up successive database on the fire and explosion accidents systematically to obtain reliable analyses.
Experimental Analysis of Corbel Part Behaviour in Inground LNG Storage Tank
Yoon I.S. ; Kim J.K. ; Kim Y.K. ; Kim J.H. ;
Journal of the Korean Institute of Gas, volume 10, issue 1, 2006, Pages 56~60
The connection part (corbel) between bottom slab and side wall in inground LNG storage tank has hinge conditions partly fixed by using anchor bars to reduce stress concentration. The corbel deforms in both radial and vertical directions under load conditions of the LNG tank such as LNG temperature, hydraulic pressure, etc. Membrane is an important part from the viewpoint of design because the deformation of the corbel is transformed directly to the membrane and superposed with other deformations. Behavior of the corbel has been investigated through various sensors to measure temperature, load and displacement. And the test data have been compared with finite element results analysis to propose a more reasonable design of LNG storage tank.