Production Of Large-diameter Pipe Research Articles

Great connections of a small town: Novomoskovsk in the international economic relations of Ukraine in the 1950s – 1980s

The purpose of the article is to define the place of Novomoskovsk in the international economic relations of Ukraine in the 1950s – 1980s, and main participants of these relations at the city level, directions, content and features. Research methods: historical-chronological, historical-genetic, comparative, descriptive. Main results. the article reveals the importance of Novomoskovsk, Dnipropetrovsk region, one of the small cities in the development of international economic relations of Ukraine as a part of the USSR. It is defined that the main factor that determined the place of Novomoskovsk in the international economic relations is the Novomoskovsk Pipe Plant activity. The role of the plant in these relations consisted of the production for export, business trips abroad, their admission to study and exchange experiences. The USSR, Ukraine in particular with its powerful industrial complex, played an important role in the reconstruction, formation, and development of the metallurgical industry in the countries of “people’s democracy” in Europe, Asia, countries whose governments were loyal to the USSR. The Novomoskovsk Pipe Plant and its employees contributed to the construction and operation of the first metallurgical complexes in Bulgaria and China. Since 1963, the enterprise has been one of the leaders in Ukraine and the USSR in the production of large diameter pipes for main gas and oil pipelines, which has strengthened its presence in the execution of export orders. The relations of the plant were not limited to the countries of the socialist camp, but also included countries with market economies. These relations were particularly influenced by political and ideological factors, as shown by the example of the USSR’s relations with West Germany, France and Japan. The Novomoskovsk Pipe Plant served as a base for holding international UN seminars on the training of metallurgical specialists, and its employees participated in international exhibitions, presenting the plant’s products. The course of the Cold War and international crises led to the appearance of a peculiar phenomenon of the Soviet era – the inclusion of production in propaganda campaigns, which were joined by groups of enterprises. From the side of the pipe plant, these were rallies in support (of Algeria, Cuba, Vietnam, etc.) and commitments on additional working days, increased production rates, early deadlines for implementation of plans, and the deduction of products in favor of support facilities. The importance of industrial relations for the development of the non-productive sphere is emphasized: contacts with foreigners in the city during business trips served as a window to the world, contributed to the expansion of worldview. In addition, with the help of people’s diplomacy there were formed trustworthy relationships between nations and people, which promoted the positive international image of the USSR in the best way possible. Practical significance: the results of the research can be used to form the theme of scientific research on regional, Ukrainian, world history of the second half of the 20th century implied into the practice of teaching relevant disciplines in higher education institutes, used to create / update museum exhibitions in Novomoskovsk. Scientific novelty: a significant part of published and unpublished sources on the topic of international economic relations of Novomoskovsk is generalized and processed for the first time, some of the sources are introduced into scientific circulation firstly and are interpreted considering the latest research on the history of the Cold War. Type of article: research.

Algorithm to Find Technical Solutions for the Modernization of the Cold Rolling Mill of Large Diameter Pipes

The problem of reconstruction and modernization of manufacturing equipment for the production of large diameter pipes was considered in this paper. To assess the strength and the technical resource of the equipment was used mathematical modeling based on the experimental results and consistent solution of nonlinear boundary value problem of the elasticity theory. The results of solution for the tube cold mill, which were used for design of the new equipment, are given

Informal Institutions in Сontracting under Сonditions of Fundamental Changes (Evidence from the Large-diameter Pipe Industry)

«Вестник Санкт-Петербургского университета. Экономика» — научно-теоретический рецензируемый журнал, обобщающий результаты исследований ученых всего мира в различных областях науки, включая мировую экономику, историю развития экономики и экономической мысли, финансы, кредит и страхование, теорию и практику управления, статистику и учет, экономико-математическое моделирование.

Russian Production of Large-Diameter Pipes Organization: The Context, Results, and Prospects

On the example of one of the successful sectors of the Russian industry — the production of large diameter pipes (LDP) for trunk pipelines, the relationship between corporate governance and industry development is explored. At present, the specificity aspects of corporate governance in Russia leads to a short planning horizon, the high role of informal rules and the strong dependence of the company development vector on the controlling shareholders (company owners) interests. The owners of LDP companies decide to increase investment and production capacity under the conditions of demand drop for LDP. At the same time, the LDP demand drop poses a problem of significant underloading of capacities, which as a result may lead to a dropin the level of pipes production competencies and the industry product quality level reduction from achieved in 2014–2015 point. The article considers the configuration of key aspects of the Russian LDP production: corporate governance, capacity utilization, which determines the accumulation and loss of competencies, as well as the product quality.

Standards as a tool for quality management in the pipe market

In the production of large diameter pipes, quality standards are a new tool of struggle in the international market. Management systems that meet the requirements of international standards, for enterprises act as a tool that, in the process of interacting with the external environment, is able to adapt and adequately rebuild the activities of the enterprise. The purpose of the article is to analyze the application of standards in pipe plants as a tool for quality management.

Тепловой эффект бейнитного превращения в трубных сталях при ускоренном охлаждении

We have designed original laboratory bench, which allows to model technological rates of cooling of hot-rolled sheets in the process of controlled thermomechanical processing (TMCP). We have used samples cut from the industrial sheet of pipe steel type 06G2MB, which was intended for production of large diameter pipes with strength X80. We have obtained dependencies of temperatures from the time at cooling rates 100-500 оС/s. All processing modes resulted in almost identical structures formed mainly due to bainitic transformation. Dispersion of structures increased with increasing cooling rate. Thermotechnical calculations were carried out assuming that the temperature equalization occurs instantly along with the sample thickness. Times of transformation are 1-9 s. Most of the transformation at all cooling modes in conditions close to isothermal occurred. Athermic nature of bainitic transformation in TMCP was recorded. In the studied interval of cooling rates, the temperature of bainitic transformation start was 660-730 ºC. The heat effect was approximately equal to 120 kJ/kg, which is twice the thermal effect of martensite transformation for the low-carbon steels. This fact allows suggesting that the kinetics of bainitic transformation is largely determined by the energy of slowest process, namely, the re-arrangement of carbon atoms of carbon in the austenite occurring in parallel to the shear adjustment of FCC lattices into BCC. It is presumed that energy contribution of the redistribution process of carbon atoms (if their amount is small) to the thermal effect of bainitic transformation at least compare with energy effect of shear lattice rearrangement.

Study of the thermomechanical behavior of API 5L X80 steel micro-alloyed with Nb-Ti through hot torsion tests

The controlled rolling of high strength low alloy steel has been widely used in the production of large diameter pipes for the oil and gas industry. The thermo-mechanical control process (TMCP) is used to maximize grain refinement and achieve both higher strength and toughness in the steels. In this sense, API 5L X80 micro-alloyed Nb-Ti steel was submitted to hot torsion tests to evaluate its hot deformation behavior. The critical temperatures (Tnr, Ar3 and Ar1) were obtained by testing with multiple strains in continuous cooling. From the flow stress curves generated in the isothermal tests, it was possible to obtain a critical strain that starts dynamic recrystallization, the peak strain for temperatures ranging from 1150oC to 850oC, and the strain rates at 0.2; 0.4 and 0.8s-1. The results showed that peak and critical stress values increase as the temperature decreases and strain rate increases.

«WHITE METALLURGY» IN THE PIPE PRODUCTION AS A BASIS OF EFFICIENT INNOVATION DEVELOPMENT OF ENTERPRISE AND REGIONAL ECONOMICS

This is a summary of large-diameter pipe production history: from the gas pipeline «Middle Asia-Centre» to the new business-concept «White metallurgy» based on the combination of production culture, high quality of products produced, environmental safety, responsibility and high personnel qualification introduced intensively within the framework of sustainable development strategy in the practices of production-economic activity of JSC «Chelyabinsk.

EXPERIMENTAL RESEARCH PHOTOGRAMMETRY METHOD FOR THE FORMING OF PIPE BILLET ON THE EDGE-BENDING PRESS SECTOR OF THE LINE TESA 1420

The results of experimental studies are shown using new measurement techniques for non-contact measurements of geometric billets on edge-bending press sector of the line 1420. The estimation of the influence of geometry on the edge of the pipe blank form to the marginal zone after subsequent processes is described. The article lists he steps of the pilot study. The experimental data is shown as coordinate points. A comparative analysis of the results of measurements of edges geometry was made in various ways. The advantages and a perspective of photogrammetry are described for the production of large diameter pipes.

Shaping of thick sheet in the production of welded large-diameter pipe

An analytical method is proposed for calculating the shaping parameters of thick sheet in the production of large-diameter pipe. This method is considered in several stages: formulation of a geometric model of the blank and the tool; numerical calculations; selection of the algorithm; and analysis of the results. Comparison of calculated and experimental shaping parameters for sheet used in the production of different types of large-diameter pipe reveals good agreement. The proposed method is recommended for calculating the shaping parameters in the production of large-diameter pipe and the setup so as to minimize the defects due to the geometry of the press.

Shaping of pipe blanks in the edge-bending press of the TESA 1420 pipe-electrowelding line

Contact geometric measurements of pipe blanks in the edge-bending section of the TESA 1420 pipe-electrowelding line are made by a new method. The influence of the pipe blank’s edge geometry on the shape of the edge zone after the subsequent processes is assessed. The stages of the experiment are outlined. The experimental data are obtained in the form of the coordinates of points on the edge. Measurements of the edge geometry by different methods are compared. The use of photographic-survey measurements is promising for use in the production of large-diameter pipe.

Engineering calculations for processes involved in the production of large-diameter pipes by the sms meer technology

Analytical methods are presented for calculating the main parameters of the mechanical processes involved in the production of large-diameter pipes by a technology developed by the German company SMS Meer – the process of bending back the edges of the semifinished product (the main parameters here are the size and shape of the thick-walled steel semifinished product during and after its shaping on an edge-bending press, the springback coefficient of the semifinished product, and the residual curvature of its edges), step-forming of the semifinished product into an O-shape (the main parameters here being the size and shape of the contact region between the punch and the semifinished product, the springback coefficient of the latter, and the residual curvature of its surface), and expansion of the pipe (the main parameter being the residual diameter of the pipe after expansion). The model of an elastoplastic medium is used for all stages of the above processes. The results of the study that was performed can be used to develop a technology for making thick-walled large-diameter pipes for major pipelines.

Production of new steel grades in the oxygen-converter shop

The production of new steel grades in the oxygen-converter shop by means of the ladle-treatment system introduced at OAO Magnitogorskii Metallurgicheskii Kombinat in 2010 is considered. That system includes two-position ladle-furnace unit 2; a two-position vacuum-treatment unit; and a two-position low-intensity injection unit. This system is used to produce high-strength pipe steel with specified hydrogen content; and low-alloy steel with guaranteed nitrogen content (no more than 0.006%) and sulfur content (≤0.002%), for the production of large-diameter pipe.

Effective broaching in mills of different design

Helical broaching mills used in the production of large-diameter pipe with variable dimensions of the blank (sleeve) are considered. The influence of the type of mill on the cyclic shape change is discussed, taking account of the supply angle. Recommendations are made regarding the readjustment of the mills and optimal broaching conditions for different purposes.

Research on Planet Crumb-Free CNC Pipe-Cutting Machine Mechanical Parameters

According to the actual production of large diameter pipe cutting presents a difficult problem planetary debris-free pipe cutting methods, design sketch of the entire system drive, cutter parameters are given, and deduced pipe cutting machine Motor and feed motor of the kinetic parameters for practical application provides a feasible solution.

Shaping of blank in large-diameter pipe production

The three most promising production methods for large-diameter pipe are considered. These methods are employed at Russian plants. Each one has advantages and disadvantages. Detailed study is required to improve product quality.

High end inspection by filmless radiography on LSAW large diameter pipes

Longitudinally submerged arc welded pipes for gas and oil transportation are subject to the most severe safety requirements. To further enhance the NDT process, EUROPIPE as a manufacturer of large diameter pipes for the oil and gas industry has invested in the digital X-ray inspection technology and herewith completely replaces the X-ray film. The new installation consists of two separate X-ray chambers in order to keep up with the production flow. In each chamber two digital detector arrays and two X-ray tubes are installed. This installation replaces three old X-ray chambers with twelve X-ray tubes. The installation is the result of long-term research and development in the field of X-ray testing. The installation is one of the first implementing this technology in an automated serial production of large diameter pipes.

Use of Accelerated Cooling to Improve the Mechanical and Processing Properties of Rolled Plates Used to Make Large-Diameter Gas-Line Pipe

A process called controlled thermomechanical rolling has been developed to make low-alloy steels used in the production of large-diameter pipes. The process, carried out on plate mills, combines thermomechanical (controlled) rolling with accelerated cooling done after the rolling operation. The results of commercial trials of the technology lead to the following conclusions: 1. Compared to conventional controlled rolling (CR), use of the additional operation of accelerated cooling (AC) makes it possible to significantly increase strength properties without lowering impact toughness or cold resistance. Accelerated cooling also makes it possible to broadly vary the properties of rolled products of a given chemical composition and thickness. 2. The accelerated cooling of plates makes it possible to replace the ferritic-pearlitic structure usually formed in steel after conventional controlled rolling with a fine-grained ferrite-bainite stucture having a diminished level of striation. 3. Compared to traditional controlled rolling, CR + AC makes it possible to attain a prescribed level of strength with lower quantities of carbon and alloying elements. That in turn improves the weldability of the steel. 4. The use of accelerated cooling reduces the load on the mill because a higher finishing temperature is used than in traditional CR. Thus, it also becomes possible to increase rolling speeds through a reduction in the number of pauses made to cool the slabs on the mill.