English

Vol. 7 4, 2017

Pages

Article name, authors, abstract and keyword

Strength, reliability, durability

12-16

Impact of stress-strain state of the pipeline on the limit state of the pipeline

Yury V. Lisin a, Sergey V. Ermish b, Nikolay A. Makhutov a, Dmitriy A. Neganov a, Viktor M. Varshitskiy a

a Pipeline Transport Institute, LLC (Transneft R&D, LLC), 47a, Sevastopolskiy prospect, Moscow, 117186, Russian Federation
b Transneft Diascan, JSC, 7 Kuybysheva Str., Lukhovitsy, Moscow Region, 140501, Russian Federation

Abstract: Normative approach to the evaluation of pipeline strength (with the use of design stresses) has been analyzed. A refined design approach has been developed that takes into account explicit stages of elastic and elastoplastic deformation and the effect of the stressed state on characteristics of attaining limiting states upon failure. The influence of the volumetric stress state on the change in the resistance to the formation of plastic deformations by means of the coefficient of increasing the first principal stress has been analyzed under the condition of the beginning of plastic deformation. The effect of the second principal tensile stress on the reduction of destructive (limiting) deformations has been studied.

Keywords: nominal stress, three-dimensionality and non-uniformity of stress-strain state, failure hypothesis, design resistance, material strain-herdening coefficient.

References:↓

Design, construction and operation

17-25

About one algorithm of pressure wave propagation velocity identification in the main oil pipeline and its realization features

Rustam Z. Sunagatullin a, Andrey V. Kudritskiy a, Igor S. Simonov a, Aleksandr M. Samusenko a, c

a Pipeline Transport Institute, LLC (Transneft R&D, LLC), 47a, Sevastopolskiy prospect, Moscow, 117186, Russian Federation

Abstract: Existing algorithms for identification of actual velocity of sound wave propagation are, a a rule, superficially described, dont take into account the peculiarities of application and computational complexity of these algorithms, which can lead to significant difficulties and even impossibility of their application in software systems for real-time monitoring of the oil pipeline state. In the presented study, the authors have developed an algorithm for identifying the value of pressure-waves propagation velocity on the linear part of the main oil pipeline (MOP). The algorithm is based on the analysis of readings of sequentially located pressure sensors and identification of the pressure fronts that occur during MOP operation transient modes. The paper gives a detailed description of the algorithm, presents the results of applying the developed algorithm to the MOP sections of Transneft.

Keywords: water hammer, pressure waves propagation velocity, parameters identification, actual characteristics.

References:↓

26-34

Floating roofs of tanks: effectiveness analysis and development directions

Ruben Z. Gadelshin a

a Research and Development center of pipeline transportation Transneft R&D LLC (STC Transneft R&D), 144/3 Oktyabrya prospect, 450055, Ufa, Bashkortostan, Russian Federation

Abstract: The paper provides a classification of internal floating coatings (IFC) of tanks, an analysis of foreign regulatory documents and publications on this topic, including an assessment of the results of determining the effectiveness of various floating coating designs in terrestrial tanks. To improve IFC efficiency, it was proposed to replace block IFC boltings with welds, increase bolted connection tightness and/or to shorten their length, eliminate IFC floating support rails by using the suspension system as an alternative. The results obtained in the work will allow identifying criteria and values of IFC efficiency, to reasonably set out technical requirements to coatings. This, in turn, will improve IFC performance, reduce environmental damage and improve the safety of reservoir operation.

Keywords: vertical tank, floating covers, floating roofs, losses from evaporation.

References:↓

35-43

Numerical modeling of crack propagation under mixed-mode loading

. Boulenouar a, N. Benamara a, M. Merzoug a

a Mechanical Engineering Department, University of Sidi-Bel-Abbes. BP 89. 22000, Larbi Ben Mhidi, Sidi Bel Abbes, Algeria

Abstract: The onset criterion of crack propagation is based on the stress intensity factor, which is the most important parameter that must be accurately estimated and facilitated by the singular element. Using the Ansys Parametric Design Language (APDL), the displacement extrapolation technique (DET) and the maximum circumferential stress (MCS) theory are employed, to obtain the stress intensity factors (SIFs) at crack tip and the crack direction at each step of propagation. The predicted results showed excellent agreement with numerical and analytical results obtained by other researchers. Thus, it is concluded that the automatic crack propagation method developed allows efficient and accurate simulation of mixed mode crack propagation problems.

Keywords: crack propagation, stress intensity factors, mixed-mode loading, displacement extrapolation.

References:↓

Pipeline repair

44-53

Overseas trends in application of composite materials for pipeline repair

Nataliya A. Egorova a, Dmitry S. Zmienko a, Igor V. Kozin a

a Pipeline Transport Institute, LLC (Transneft R&D, LLC), 47a, Sevastopolskiy prospect, Moscow, 117186, Russian Federation

Abstract: For over twenty years, composite materials have been used to repair pipeline defects. Initially, composite materials were used to repair corroded pipelines in order to restore the strength of damaged areas. In addition to repairing corrosion defects, manufacturers offer to use composite materials for the repair of dents, corrugations, bent sections of pipes, including bends and tees. This paper gives a brief overview of various composite repair systems used outside Russia. It explores both advantages and limitations of their application and shows current and prospective areas of research to create more efficient repair systems.

Keywords:composite materials, pipeline repair, composite reinforcement, composite repair systems.

References:↓

54-61

Development of repair components for selective repair of the pipelines

Nikolay G. Goncharov a, Aleksey A. Yushin a, Artem V. Sudnik a

a Pipeline Transport Institute, LLC (Transneft R&D, LLC), 47a, Sevastopolskiy prospect, Moscow, 117186, Russian Federation

Abstract: The paper considers topical issues of selective repair of defective sections of oil pipelines and oil product pipelines with use of repair structures, i.e., split and female T-connectors. The analysis of use of repair structures in the form of split tees is presented, while features of carrying out of welding-assembly works and results of experimental researches are stated. The results of tests of repair structures on static strength and durability by cyclic loading at maximum permissible loads under operating conditions at a specialized stand are presented, with the test procedure described in detail. Stand testing have indicated that the tested specimen were not destroyed at loads simulating the maximum pipeline load under operating conditions.

Keywords: split tee, welds, major pipelines, welding, pipe, heat-affected area, thermal cycle of welding, mechanical properties.

References:↓

Economy and management

62-70

Methodological approaches and principles of preparation of financial model of the company according to IFRS

Pavel Y. Serikov a, Konstantin A. Sivolotskiy a, Maria V. Shchiponikova a, Andrey A. Mestnikov a

a Transneft, 57, Bolshaya Polyanka Str., Moscow, 119180, Russian Federation

Abstract: The paper explores approaches and principles of developing a companys consolidated financial model that complies with International Financial Reporting Standards (IFRS). The example of the financial model adopted in Transneft Group is used to describe a universal algorithm for developing a IFRS financial model. The main stages of the proposed algorithm for developing a IFRS financial and economic model are considered in detail, from initial data collection to calculation of forecast financial and economic indicators.

Keywords: financial model, IFRS, accounting, financing, key performance indicators.

References:↓

71-75

Enhancement of oil pipelines operation practice considering the requirements of safety in the decision support system in the field of regulatory framework

Yakov M. Fridlyand a, Anatoly M. Korolenok b

a Pipeline Transport Institute, LLC (Transneft R&D, LLC), 47a, Sevastopolskiy prospect, Moscow, 117186, Russian Federation
b Gubkin Russian State University of Oil and Gas (National Research University), 65 Leninsky Prospekt, Moscow, 119991, Russian Federation

Abstract: Key aspects of the problem of substantiating regulatory requirements, including their clarification and corrections in main oil pipeline operation are considered taking into account the industrial ecology requirements adopted in DSS. Structure of DSS regulatory support is proposed in determining the risk of emergencies. DSS effectiveness is found to largely depend on the effectiveness of the current system for collecting and processing information used in assessing the magnitude of emergency risk at the main oil pipeline facilities, as well as the scientific and technical level of solving rationing problems in relevant R&D, design and production organizations, supervisory and assessment bodies.

Keywords: major pipeline, industrial safety, regulatory and technical documents, decision support system.

References:↓

Commodity-transport operations and metrological support

76-83

Effectiveness of the side discharge at oil products supply to several consumers

Vyacheslav V. Pavlov, Georgy N. Matveev a, Leonid M. Bekker a, Konstantin Y. Shtukaturov a

a Giprotruboprovod Institute for Trunk Pipeline Design, JSC (Giprotruboprovod, JSC) 241, Vavilova Str., Moscow, 119334, Russian Federation

Abstract: The article considers the following variants of oil products supply to several consumers: with the arrangement of side discharge (simultaneous transfer to all consumers) and alternate supply to each consumer separately. For considered variants there were defined the power consumption of the pumps for transfer, the necessity of pressure control unit construction for associated discharge, extension of the oil products quality measurement system at alternate supply and requirements to pump equipment at pump transfer stations and systems of protection against pressure rise at terminals. As a result of comparison a conclusion has been made on the optimum variant of oil products supply via the pipeline to several consumers.

Keywords: oil products transfer, discharge, hydraulic calculations, pipeline capacity.

References:↓

Materials and equipment

84-93

Investigation of pipelines vibration at testing of high-capacity major pumps

Ivan V. Bukharov a, Valery V. Bodrov a

a Ural Engineering Center, LLC, 6, Rozhdestvenskogo Str., Chelyabinsk 454007, Russian Federation

Abstract: The paper describes the bench system for testing centrifugal pumps and considers the problem of DN1000 pipeline vibrations occurred during the testing of main HM10000-210 pumps. Causes of increased vibration, including cavitation in the throttling of a high-power flow, have been analyzed. The conditions and methods for conducting studies on the increased vibration causes are described. Ways to solve this problem are proposed and experimentally confirmed. The results of measuring the magnitude and spectrum of the vibration velocity distribution at different pipeline sections under various test conditions are presented as the criteria for assessing the studies. The effect of an additional support installation on the pipeline vibration magnitude in various test modes is analyzed.

Keywords: pipeline vibration, pumps testing, flow throttling, cavitation.

References:↓

Automatics, telemechanics & comm

94-105

Optimization of energy costs in pipeline transportation of hot oils

Iskander K. Beisembetov a, imur . Bekibayev a, Uzak K. Zhapbasbayev a, Erbol S. Makhmotov b, Berik K. Sayahov b

a Kazakh-British Technical University, 59, Tole bi St., Almaty, 050000, Republic of Kazakhstan
b KazTransOil, JSC, 19, Block B, Kabanbai Batyr Ave., Astana, 010000, Republic of Kazakhstan

Abstract: The paper considers hot oil pumping enhancement by identifying energy-saving operating conditions of pumps and a heating furnace. The algorithm for solving the problem is based on a new dynamic programming approach. The search problem is divided into a set of overlapping sub-tasks including finding the best substructure.
The object of each sub-task is the function of pumps and heating furnace energy consumption at stations of a pipeline section. Search for a solution involves a combination of working pumps and heating furnaces, which ensures the minimum amount of energy consumption costs. The discussion considers results of calculations of hot pumping at the Kasymov Bolshoy Chagan section of the Uzen Atyrau Samara main oil pipeline. The calculation algorithm is implemented in the SmartTran software for hot pumping modeling and enhancement.

Keywords: digital technology, pipeline transport, optimisation criterion, hot transfer.

References:↓

Law enforcement and security

106-114

Uncertainty of procurement legislation in pipeline transport industry

Denis A. Presnyakov a, Nikolay A. Babenko a, Alfred G. Mubarakshin b

a Transneft, 57, Bolshaya Polyanka Str., Moscow, 119180, Russian Federation
b Executive and administrative staff of Transneft Kama Region, JSC (EAS), 20/1 P. Lumumby St., Kazan, 420081, Republic of Tatarstan, Russian Federation

Abstract: The paper considers general issues of uncertainty in procurement legislation. The principles of legislation are indicated, which are the manifestation of the greatest level of uncertainty. Examples of procurement activities in oil and petroleum products pipeline transportation are used to examine how the legitimacy (illegality) of customer activities are assessed taking into account these principles. The grounds for strengthening the procurement legislation certainty are analyzed. The reasons why the legislator currently does not specify many rules of 223-FZ are indicated.

Keywords: legislation uncertainty, overcoming of uncertainty, legislation on procurement, procurement by specific types of legal persons, principles of legislation.

References:↓

Staff management

115-115

Succession of engineers generations: threat or a new stage of the pipeline industry development?

John Tiratsooa

a Tiratsoo Technical, Department of Great Southern Press, Beaconsfield, UK

Abstract: Here the reports are reviewed presented at the conference Pipeline Pigging & Integrity Management in Houston, which consider the problem of professional succession in the pipeline transport industry. In their works the authors analyze the problems related to the succession of engineers-pipefitters generations, describe the mechanisms of effective handover of professional knowledge and experience.

Overview of scientific periodicals

116-119

Investigation of strain and destruction mechanics and some issues of securing safety and reliability of the pipelines considering the process peculiarities

Valentin N. Komaritsa a, Nataliya N. Sukhorukova a

a Pipeline Transport Institute, LLC (Transneft R&D, LLC), 47a, Sevastopolskiy prospect, Moscow, 117186, Russian Federation

Abstract: The review presents the results of international investigations in the field of material science and mechanics of engineering structures interaction, as well as articles dedicated to the issues of securing safety and reliability of the pipelines considering the peculiarities of the process and facility structure.