scholarly journals APPROBATION AND ANALYSIS OF EXPERIMENTAL RESEARCHES'S RESULTS OF THE EXTENDED METHOD OF PHYSICAL-MECHANICAL CHARACTERISTICS STEELS'S CONTROL

2018 ◽  
pp. 37-49
Author(s):  
N. I. Chaban ◽  
I. V. Rybitskyi ◽  
M. O. Karpash ◽  
V. D. Myndiuk
Keyword(s):  
Structural Changes ◽  
Mechanical Characteristics ◽  
Oil And Gas ◽  
Experimental Studies ◽  
Calculation Model ◽  
Flaw Detector ◽  
Structural Noise ◽  
Destructive Testing ◽  
Reasonable Choice ◽  
Non Destructive

Most of the oil and gas equipment complex is subjected to cyclic-variable, mechanical, thermal loads and corrosive-active environment. These effects causing a change in the structural statr of the metal contribute to the accelerated development of defects, especially in places with stress concentrators, which ultimately lead to the constructions destruction. Available ultrasonic, electromagnetic, and eddy-current non-destructive testing methods are currently aimed at solving defect detection problems. However, it is more important to timely identify the initial stage of the process of damage accumulation in a metal by determining changes in the structural state of the metal. The article proposes a methodology for studies of steel structural changes arising in the process of exploitation and their impact on mechanical characteristics. A reasonable choice of the optimal indicator characterizing the image of the acoustic structural noise of the material obtained by applying ultrasonic flaw detector in a complete set with piezoelectric converters with a phased array is substantiated. The complex of physical and mechanical parameters of the investigated samples are measured and the results obtained were analyzed. The modern methods of determination of mechanical characteristics of steels are considered, their deficiencies are determined and the methods of their optimization are proposed. The regression-correlation analysis of the experimental studies results was carried out, which resulted in the equation of dependence between a set of non-destructive control parameters and mechanical characteristics of steels was obtained. In order to verify the adequacy of the proposed model and to establish the possibility of controlling the casing and tubing on the samples made, series of experimental studies were carried out, which confirmed the reliability of the resulting calculation model for determining the mechanical characteristics of the steels by using two informative parameters, namely hardness and integral density of images of acoustic structural noise.

scholarly journals ANALYSIS OF METHODS AND MEANS OF DETERMINATION OF THE FACTORY OF OIL PIPELINES AND THE CALCULATION OF THEIR RESIDUAL RESOURCES

2021 ◽  
pp. 134-141
Author(s):  
R. T. Martyniuk ◽  
O. T. Chernova ◽  
M. R. Shyan
Keyword(s):  
Oil And Gas ◽  
Experimental Studies ◽  
Statistical Processing ◽  
Design Parameters ◽  
Experiment Planning ◽  
Actual State ◽  
Technical Diagnostics ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Non Destructive

The basic principle of diagnosing long-life metal structures, and pipe­lines in particular, is based on consistent and systematic measurements of certain design parameters, on detecting changes in these parameters during operation and comparing them with the original ones, and on predicting changes in these parameters. The application of technical diagnostics and non-destructive testing methods to determine the actual technical status is a regular technological operation and, as experience shows, an effective way of ensuring the tech­nical reliability and safe operation of pipelines and the gas transmission system as a whole. The methods of non-destructive testing, correlation analysis and mod­ern methods of statistical processing of experimental and reference data (artificial neural networks) were used to determine the actual state of oil and gas pipelines. Factor and regression analysis methods were used during theoretical studies. In the course of the experimental studies, the methods of experiment planning, probability theory were used.

Photometric Method of Diagnosis of Bearing Units Operating with Hydrocarbon Mixtures

2018 ◽  
Vol 284 ◽  
pp. 1342-1348
Author(s):  
E.N. Gryadunova ◽  
R.N. Polyakov ◽  
N.V. Tokmakov
Keyword(s):  
Experimental Studies ◽  
Physicochemical Process ◽  
Bright Spot ◽  
Photometric Method ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Internal Damage ◽  
Hydrocarbon Mixtures ◽  
Bearing Unit ◽  
Non Destructive

The article is devoted to the diagnosis of bearing units working with hydrocarbon mixtures. The diagnostic is based on the photometric method. This method allows you to determine the internal damage to the bearing unit at the stage of the appearance of the microcrack. The photometric method is based on changing the color of the indicator fabric. As the indicator substance, a bromine solution was used which had a dark brown color. If there is a leak, the hydrocarbon reacts with bromine molecules and a bright spot appears on the tape. Indicator fabric is applied to the bearing unit during assembling.The material of the article contains a model of the physicochemical process, which is the basis of the photometric method. Various stages of leakage of hydrocarbon mixtures through microcracks were studied. The results of the experimental studies are consistent with the theoretical propositions. The proposed diagnostic method can be used as a method for non-destructive testing of bearing units.

scholarly journals Investigation of the corrosion process and destruction of metals by using acoustodamage method

2019 ◽  
Vol 121 ◽  
pp. 01017 ◽  
Author(s):  
Dmitry Tretyakov ◽  
Alexander Belyaev ◽  
Aliya Galyautdinova ◽  
Vladimir Polyanskiy ◽  
Darya Strekalovskaya
Keyword(s):  
Oil And Gas ◽  
Quantitative Relationship ◽  
Oil And Gas Industry ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Gas Industry ◽  
Acoustic Anisotropy ◽  
Industrial Alloy ◽  
Hydrogen Induced Cracking ◽  
Non Destructive

The paper presents the results of investigation of acoustic anisotropy in industrial alloy made of steel 14HGNDC after hydrogen-induced cracking (HIC) tests according to the standard NACE TM0284-2003. It was found that location and parameters of corrosion cracks with size about 20 microns can be determined by distribution and value of acoustic anisotropy. A quantitative relationship between value of acoustic anisotropy and size of corrosion cracks in the range from 60 to 6600 microns was established. The obtained results have a great importance for improving methods of hydrogen-induced cracking tests and for non-destructive testing of brittle destruction of structures in oil and gas industry by using the acoustodamage method.

New Environmentally Friendly Solutions to Prevent Oil Pipelines Disasters

2015 ◽  
Vol 797 ◽  
pp. 334-344
Author(s):  
Michał Bardadyn ◽  
Marcelo Paredes ◽  
Mateusz Wrobel ◽  
Krystian Paradowski ◽  
Andrzej Zagórski ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Surrounding Medium ◽  
Operating Conditions ◽  
Small Samples ◽  
Destructive Testing ◽  
Element Analysis ◽  
Qualified Personnel ◽  
Oil Pipelines ◽  
Pipeline Networks ◽  
Non Destructive

In this paper a newly environmental friendly Non-Destructive Testing (NDT) method for underground oil and gas pipeline networks is proposed. A suitable equipment extracts small samples of material from installed buried pipes for mechanical testing. Numerical calculations using Finite Element Analysis (FEM) proves that decreasing wall-thickness pipes is safe for in-field operating conditions. Nevertheless, those locations from where samples are cut should be monitored. For instance by means of Acoustic Testing (AT) system. New way of placing sensors is proposed. Sensors are introduced inside the pipe so that any acoustic wave changes from surrounding medium can be measured. In this type of AT a straightforward procedure must be followed to install sensors on pipe. Therefore, there is no need to uncover tested areas with qualified personnel. The research showed that the signals recorded from internal sensors are comparable to those results extracted from external ones. The study also revealed lower vulnerability to acoustic interference of the sensor placed inside the pipeline.

scholarly journals Smartphone-Based Automated Non-Destructive Testing Devices

2020 ◽  
Vol 11 (4) ◽  
pp. 272-278
Author(s):  
V. F. Petryk ◽  
A. G. Protasov ◽  
R. M. Galagan ◽  
A. V. Muraviov ◽  
I. I. Lysenko
Keyword(s):  
Information Technologies ◽  
Flaw Detector ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Interdisciplinary Field ◽  
Ultrasonic Flaw Detector ◽  
Ultrasonic Flaw ◽  
Operational Information ◽  
General Network ◽  
Non Destructive

Currently, non-destructive testing is an interdisciplinary field of science and technology that serves to ensure the safe functioning of complex technical systems in the face of multifactorial risks. In this regard, there is a need to consider new information technologies based on intellectual perception, recognition technology, and general network integration. The purpose of this work was to develop an ultrasonic flaw detector, which uses a smartphone to process the test results, as well as transfer them directly to an powerful information processing center, or to a cloud storage to share operational information with specialists from anywhere in the world.The proposed flaw detector consists of a sensor unit and a smartphone. The exchange of information between the sensor and the smartphone takes place using wireless networks that use "bluetooth" technology. To ensure the operation of the smartphone in the ultrasonic flaw detector mode, the smartphone has software installed that runs in the Android operating system and implements the proposed algorithm of the device, and can serve as a repeater for processing data over a considerable distance (up to hundreds and thousands of kilometers) if it necessary.The experimental data comparative analysis of the developed device with the Einstein-II flaw detector from Modsonic (India) and the TS-2028H+ flaw detector from Tru-Test (New Zealand) showed that the proposed device is not inferior to them in terms of such characteristics as the range of measured thicknesses, the relative error in determining the depth defect and the object thickness. When measuring small thicknesses from 5 to 10 mm, the proposed device even surpasses them, providing a relative measurement error of the order of 1 %, while analogues give this error within 2–3 %.

scholarly journals METHOD OF REFERENCE SIGNALS CREATING IN NON-DESTRUCTIVE TESTING BASED ON LOW-SPEED IMPACT

2021 ◽  
Vol 2021 (4) ◽  
pp. 70-82
Author(s):  
V.S. Eremenko ◽  
◽  
V.P. Babak ◽  
A.O. Zaporozhets ◽  
◽  
...  
Keyword(s):  
Flaw Detector ◽  
Signal Spectrum ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Orthogonal Functions ◽  
Discrete Hartley Transform ◽  
Information Signal ◽  
Random Components ◽  
Non Destructive ◽  
Discrete Argument

The article describes the approach to the formation of a simulation model of information signals, which are typical for objects with different types of defects. The dispersive analysis of the signal spectrum components in the bases of the discrete Hartley transform and the discrete cosine transform is carried out. The analysis of the form of the reconstructed information signal is carried out depending on the number of coefficients of the spectral alignment in Hartley bases and cosine functions. The basis of orthogonal functions of a discrete argument is obtained, which can be used for the spectral transformation of information signals of a flaw detector. A method of simulation of information signals has been developed and experimentally investigated, which allows taking into account the deterministic and random components of the characteristics of real information signals. References 24, figures 13, tables 3.

scholarly journals Robotic Model for Unmanned Crack and Corrosion Inspection

2019 ◽  
Vol 9 (1) ◽  
pp. 862-867 ◽  
Keyword(s):  
Structural Integrity ◽  
Oil And Gas ◽  
Processing Technique ◽  
High Rate ◽  
Image Processing Technique ◽  
Destructive Testing ◽  
Periodic Inspection ◽  
The Cost ◽  
The Impact ◽  
Non Destructive

After prolonged usage of materials, the formation of cracks and corrosion initiates due to stress, loading condition, the environment of operation, etc. and this affects the structural integrity of structures. Periodic inspection of structures is usually planned, especially in industries where the impact of failure could be devastating, such as oil and gas pipelines, storage tanks, vessels, and airplanes, etc. which are just a few amongst others. This inspection is often aimed at detecting cracks and corrosion of internal and external components using several forms of non-destructive testing mechanism usually performed by a specialist at a high rate. To reduce the cost of inspection as well as downtime due to inspections and maintenance, deployments of mobile robots with fault tracking and identification purpose are steadily increasing. This paper, therefore, details the implementation of an image processing technique using MATLAB to identify defects of structural elements.

Regularities of Changes in the Mechanical Characteristics and Electrical Properties of the Reaction Furnaces Coils Material during Operation

2020 ◽  
Vol 992 ◽  
pp. 706-711
Author(s):  
E.A. Naumkin ◽  
J.N. Shermatov
Keyword(s):  
Structural Changes ◽  
Mechanical Characteristics ◽  
Diffusion Processes ◽  
Relative Magnitude ◽  
Electrical Signal ◽  
Destructive Testing ◽  
Static Tests ◽  
Negative Effect ◽  
Void Structure ◽  
Reaction Furnace

The main causes of early failure of reaction furnaces coils are diffusion processes in the material as a result of which structural changes occur, new phases are formed and void structure is formed in the surface layers of the metal, which has a negative effect on the mechanical characteristics. In this regard as a structurally sensitive method, which allows evaluating the changes occurring in the metal, the response parameters of the electrical signal are used which are sensitive to pore formation and allow predicting the zone of formation of the breaking crack. Fragments of the coils of the reaction furnaces from the radiant section, which were in operation for 750, 1300, 8000, and 10000 hours and the pipe element in the delivery condition were chosen as the objects of the study. As a result of the research a correlation between the amplitude of the first harmonic of the electrical signal output voltage with the results of static tests for tensile and impact bending was established. This happens due to the fact that during operation there is an increase in the relative impact viscosity and relative tensile strength, and the relative magnitude of the voltage amplitude of the first harmonic of the output electrical signal also increases. These results can be used as a method of mechanical properties assessment by non-destructive testing, and also they can be used to develop a criterion for the rejection of reaction furnace coils.

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