Natural gas quality determination as primary energy resource for our country can be assigned to e... more Natural gas quality determination as primary energy resource for our country can be assigned to energy security from the point of view of its limited resources in Ukraine and the dynamics of the continuous growth of prices for natural gas. Just so, since 1999, the price for natural gas has increased at an average almost in 3 times for the population and in 10 times for enterprises. Heat, released by the natural gas burning (heating value) is the main indicator of natural gas quality, the indicator of its application. The heating value of natural gas can be determines in two ways: – by the calculation method (for component composition) [1]; – by the experimental method (using the water calorimeter) [2]. Both methods for natural gas heating value determination have a number of significant drawbacks [8, 9], the main of which are: – significant time and cost expenses for the research; – inability of the heating value continuous measurement (in real time) directly to the consumer. For so...
Recently the problem of safe operation time definition and extension is really urgent in all indu... more Recently the problem of safe operation time definition and extension is really urgent in all industrially advanced countries. Decline of metalware production for the replacement of decommissioned one causes the significance or problem solving. Primarily it concerns thermal and nuclear power stations, petroleum and natural gas industry, chemical industry, ground and air transportation, civil engineering [1]. Scope of Ukraine's pipeline system, a wide variety of severe hydrogeological conditions of pipelines laying and a large number of those which worked 50-75% of normative life time cause a special relation to their safe operation ensuring. The application of technical diagnosis and non-destructive testing methods is normal operation for actual technical state evaluation and as the practice shows an effective way for assurance of technical reliability and safe operation of pipelines and gas transportation system as a whole. Physical and mechanical properties of pipe metal are on...
Basic parameter which characterizes technical state of metallic structures (MS) is thickness of i... more Basic parameter which characterizes technical state of metallic structures (MS) is thickness of its critical components. Thickness control is most common routine in technical inspection and is used for evaluation of residual operating life. Ultrasonic inspection is most efficient among existing non-destructive methods for thickness control. Almost all current ultrasonic inspection methods require the use of a couplant between transducer and the material to be inspected. Need of couplant is probably the most serious restriction of the method. Non-contact ultrasonic inspection allows exclusion of the disadvantage and increase inspection efficiency. Great energy losses during non-contact air-coupled ultrasonic inspection disable using commercial ultrasonic transducers [1]. In this report there are given main results of theoretical and experimental research concerning air-coupled ultrasonic transducers design and experimental setup for non-contact ultrasonic measurement of geometry para...
ABSTRACT We figured out the most informative parameters of microstructural changes in the materia... more ABSTRACT We figured out the most informative parameters of microstructural changes in the materials of metalworks, interrelated with their mechanical and physical properties. In order to determine the structureand phase-sensitive characteristics of materials, we used various methods and means of nondestructive testing. By using a set of the physicomechanical characteristics of nondestructive testing, we found the optimal number of control parameters and microstructure characteristics.
One of the most effective ways of preventing drill equipment (pipe strings) failures is the evalu... more One of the most effective ways of preventing drill equipment (pipe strings) failures is the evaluation of real technical state of threaded joints at various exploitation stages using methods of non-destructive testing. Detection of cracks in pipe body is reviewed. The parameters of inspection are determined for various standard sizes of pipes.Flaw detection in pipe threaded joints with triangular and tool-joints threads is discussed. The ultrasonic method is proposed to use. The special techniques of non-destructive testing are described. The most interesting is technique that allows flaw detection in heavy-weight drill pipes threaded joint without disassembling. Also a novel technique for quality inspection of thread stripping (bonding strength and leakproofness) is proposed. Threoretical basis of this technique is discussed. All techniques are impemented in real technical means that are showed and mentioned.
The problems of usage of combined measurement method for several material parameters set (hardnes... more The problems of usage of combined measurement method for several material parameters set (hardness and thermal conductive parameter) to evaluate mechanical properties of metalwork materials. The results of comparative investigations to establish the dependence between several non-destructive parameters and yield strength of the lifting pipe material are given.
Volume 1: Fuels and Combustion, Material Handling, Emissions; Steam Generators; Heat Exchangers and Cooling Systems; Turbines, Generators and Auxiliaries; Plant Operations and Maintenance, 2013
World experience shows that important factor in the calculations for natural gas consumption betw... more World experience shows that important factor in the calculations for natural gas consumption between suppliers and consumers is not only the volume of natural gas, but the quality indicators. With gas market liberalization, gas properties are expected to vary more frequently and strongly (composition, heating value etc.). Quality of natural gas is currently a topical issue, considering the steady increase of gas consumption in the world in recent decades. Existent chromatographs and calorimeters are very accurate in gas quality determination, but general expenditure and maintenance costs are still considerable. Market demands alternative lower cost methods of natural gas quality determination for transparent energy billing and technological process control. Investigation results indicate that heating value (HV) is a nonlinear function of such parameters as sound velocity in gas, N2 and CO2 concentration. Those parameters show strong correlation with natural gas properties of interes...
Natural gas quality determination as primary energy resource for our country can be assigned to e... more Natural gas quality determination as primary energy resource for our country can be assigned to energy security from the point of view of its limited resources in Ukraine and the dynamics of the continuous growth of prices for natural gas. Just so, since 1999, the price for natural gas has increased at an average almost in 3 times for the population and in 10 times for enterprises. Heat, released by the natural gas burning (heating value) is the main indicator of natural gas quality, the indicator of its application. The heating value of natural gas can be determines in two ways: – by the calculation method (for component composition) [1]; – by the experimental method (using the water calorimeter) [2]. Both methods for natural gas heating value determination have a number of significant drawbacks [8, 9], the main of which are: – significant time and cost expenses for the research; – inability of the heating value continuous measurement (in real time) directly to the consumer. For so...
Recently the problem of safe operation time definition and extension is really urgent in all indu... more Recently the problem of safe operation time definition and extension is really urgent in all industrially advanced countries. Decline of metalware production for the replacement of decommissioned one causes the significance or problem solving. Primarily it concerns thermal and nuclear power stations, petroleum and natural gas industry, chemical industry, ground and air transportation, civil engineering [1]. Scope of Ukraine's pipeline system, a wide variety of severe hydrogeological conditions of pipelines laying and a large number of those which worked 50-75% of normative life time cause a special relation to their safe operation ensuring. The application of technical diagnosis and non-destructive testing methods is normal operation for actual technical state evaluation and as the practice shows an effective way for assurance of technical reliability and safe operation of pipelines and gas transportation system as a whole. Physical and mechanical properties of pipe metal are on...
Basic parameter which characterizes technical state of metallic structures (MS) is thickness of i... more Basic parameter which characterizes technical state of metallic structures (MS) is thickness of its critical components. Thickness control is most common routine in technical inspection and is used for evaluation of residual operating life. Ultrasonic inspection is most efficient among existing non-destructive methods for thickness control. Almost all current ultrasonic inspection methods require the use of a couplant between transducer and the material to be inspected. Need of couplant is probably the most serious restriction of the method. Non-contact ultrasonic inspection allows exclusion of the disadvantage and increase inspection efficiency. Great energy losses during non-contact air-coupled ultrasonic inspection disable using commercial ultrasonic transducers [1]. In this report there are given main results of theoretical and experimental research concerning air-coupled ultrasonic transducers design and experimental setup for non-contact ultrasonic measurement of geometry para...
ABSTRACT We figured out the most informative parameters of microstructural changes in the materia... more ABSTRACT We figured out the most informative parameters of microstructural changes in the materials of metalworks, interrelated with their mechanical and physical properties. In order to determine the structureand phase-sensitive characteristics of materials, we used various methods and means of nondestructive testing. By using a set of the physicomechanical characteristics of nondestructive testing, we found the optimal number of control parameters and microstructure characteristics.
One of the most effective ways of preventing drill equipment (pipe strings) failures is the evalu... more One of the most effective ways of preventing drill equipment (pipe strings) failures is the evaluation of real technical state of threaded joints at various exploitation stages using methods of non-destructive testing. Detection of cracks in pipe body is reviewed. The parameters of inspection are determined for various standard sizes of pipes.Flaw detection in pipe threaded joints with triangular and tool-joints threads is discussed. The ultrasonic method is proposed to use. The special techniques of non-destructive testing are described. The most interesting is technique that allows flaw detection in heavy-weight drill pipes threaded joint without disassembling. Also a novel technique for quality inspection of thread stripping (bonding strength and leakproofness) is proposed. Threoretical basis of this technique is discussed. All techniques are impemented in real technical means that are showed and mentioned.
The problems of usage of combined measurement method for several material parameters set (hardnes... more The problems of usage of combined measurement method for several material parameters set (hardness and thermal conductive parameter) to evaluate mechanical properties of metalwork materials. The results of comparative investigations to establish the dependence between several non-destructive parameters and yield strength of the lifting pipe material are given.
Volume 1: Fuels and Combustion, Material Handling, Emissions; Steam Generators; Heat Exchangers and Cooling Systems; Turbines, Generators and Auxiliaries; Plant Operations and Maintenance, 2013
World experience shows that important factor in the calculations for natural gas consumption betw... more World experience shows that important factor in the calculations for natural gas consumption between suppliers and consumers is not only the volume of natural gas, but the quality indicators. With gas market liberalization, gas properties are expected to vary more frequently and strongly (composition, heating value etc.). Quality of natural gas is currently a topical issue, considering the steady increase of gas consumption in the world in recent decades. Existent chromatographs and calorimeters are very accurate in gas quality determination, but general expenditure and maintenance costs are still considerable. Market demands alternative lower cost methods of natural gas quality determination for transparent energy billing and technological process control. Investigation results indicate that heating value (HV) is a nonlinear function of such parameters as sound velocity in gas, N2 and CO2 concentration. Those parameters show strong correlation with natural gas properties of interes...
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