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2019/4
Estimated level of stress concentration in joints of welded pipes and fittings (welded tees) of main pipelines
Geosciences

Authors: George I. MAKAROV graduated from Bauman Moscow Higher Technical School in 1973. He is Doctor of Technical Sciences, Professor of the Department of Welding and Monitoring of Oil and Gas Facilities of Gubkin Russian State University of Oil and Gas (National Research University). He is specialist in the field of strength and fracture mechanics. He is author of more than 100 works, a monograph and a textbook. E-mail: svarka@gubkin.ru

Abstract: The article opens a series of publications on the results of a cycle of works on the estimated level of the stress-strain state of welded pipes joints of main pipelines with connecting parts of the following types: transitional and equal bore tees; concentric and eccentric transitions; elliptical plugs. The numerical solution of these types of problems was obtained by the finite element method using the free educational version of the computer program ANSYS Student. This article presents the calculating results of welded pipes with typical welded tees joints, and provides an assessment of the bearing capacity under various operating conditions.

Index UDK: 621.791; 624.042; 624.044; 624.046

Keywords: main pipeline, welded pipes, connecting parts, welded tees, stress-strain state, stress concentration, bearing capacity assessment

Bibliography:
1. Makarov G.I. Oil and gas welded structures and facilities. Calculation and design. Textbook for students of oil and gas higher education school. M.: Publishing house “Sputnik+”, 2013, 361 p. (in Russian).
2. Makarov G.I. Technical policy strategy of oil and gas pipeline transport systems modernization. Welding, 2013, no. 9, p. 44-48 (in Russian).
3. Makarov G.I. Technical Policy Strategy. The technical policy strategy in the design, construction and operation of oil and gas pipeline transport systems. Business Journal Neftegaz.RU, 2016, no. 11-12, p. 20-25 (in Russian).
4. Technical regulations of buildings and structures safety. Federal Law No. 384-ФЗ of 12.30.2009 (in Russian).
5. Makarov G.I., Antonov A.A. Welded main pipelines residual welding stresses level laser interferometry method estimation. Welding, 2018, no. 1, p. 38-42 (in Russian).
6. Makarov G.I., Kapustin O.E. Welded pipelines stress-strain state experimental estimation using electrical resistance sensors and analog-to-digital converters. Welding, 2018, no. 11, p. 3-14 (in Russian).
7. Makarov G.I., Vinokurov V.A. Elastic strip with a stationary moving crack dynamics. Applied mechanics problems ordinary differential equations theory methods. M.: “Proceedings of the Moscow Higher Technical School”, 1980, no. 336, p. 24-31 (in Russian).
8. Makarov G.I. User manual for the computer program ANSYS for welded structures finite element method calculation. M.: Publishing Center of I.M. Gubkin Oil and Gas Russian State University, 2019, 53 p. (in Russian).
9. Makarov G.I. Pipes quality regulation. Federal normative documents development principles for main pipelines pipe products properties regulating under conditions of import substitution. Business Journal Neftegaz.RU, 2015, no. 11-12, p. 14-20 (in Russian).
10. Makarov G.I. The pipe question. Standardization and technical regulation of main pipelines pipe products quality under conditions of import substitution. Business Journal Neftegaz.RU, 2015, no. 5, p. 12-17 (in Russian).
11. Makarov G.I. On the steps of the normative hierarchy. Confirmation of the correspondence of main gas pipelines large-diameter pipes to normative requirements for fracture toughness indexes. Business Journal Neftegaz.RU, 2014, no. 5, p. 18-22 (in Russian).
12. Makarov G.I. Main line for main pipelines. Prospects for welded high-strength pipes using. Business Journal Neftegaz.RU, 2013, no. 1-2, p. 64-69 (in Russian).

2018/3
Сhecking quality of welded pipes for gas pipelines for compliance with static and dynamic crack resistance normative requirements
Geosciences

Authors: Georgy I. MAKAROV graduated from Bauman Moscow Higher Technical School in 1973. He is Doctor of Technical Sciences, Professor of the Department of Welding and Oil and Gas Facilities Monitoring of Gubkin Russian State University of Oil and Gas (National Research University). He is specialist in the field of strength and fracture mechanics. He is author of more than 100 works, a monograph and a textbook. E-mail: svarka@gubkin.ru

Abstract: The article considers a new system for quality assurance of large diameter welded pipes for main gas pipelines in terms of fracture toughness. We propose to use the existing quality assurance system for tubulars for oil and petroleum products pipeline transport. It is proposed to use static fracture toughness and long crack propagation resistance as the normalized fracture toughness parameters, These have not been previously used for main gas pipelines

Index UDK: 621.791; 624.042; 624.044; 624.046

Keywords: main gas pipeline, welded pipes, quality parameters assurance, fracture toughness, static crack resistance, long crack propagation resistance

Bibliography:
1.Makarov G.I. Protyazhennye razrusheniya magistral’nyh gazoprovodov. Pod red. A.D. Sedyh. M.: Izdatel’stvo «Academia», 2002, 208 p.
2.Makarov G.I., Dimov L.A. Vliyanie gruntovoj zasypki osnovaniya na protyazhennye razrusheniya podzemnyh magistral’nyh gazoprovodov. Osnovaniya, fundamenty i mekhanika gruntov, 2005, no. 2, p. 7-10.
3.Makarov G.I., Dimov L.A. Effect of Soil Backfill of Bed on Extended Failures of Underground Gas Mains. Soil Mechanics and Foundation Engineering, 2005, vol. 42, no. 2, p. 46-50.
4.Makarov G.I. Dopolnenie k teorii rascheta magistral’nyh gazoprovodov na soprotivlyaemost’ protyazhennym razrusheniyam. Truboprovodnyj transport [Teoriya i praktika], 2008, no. 1, p. 22-25.
5.Makarov G.I. Utochnennaya teoreticheskaya model’ deformirovaniya truby magistral’nogo gazoprovoda pri protyazhennom bezostanovochnom razrushenii. Truboprovodnyj transport [Teoriya i praktika], 2008, no. 2, p. 16-19.
6.Makarov G.I. Vliyanie topografii dvizheniya treshchiny na soprotivlyaemost’ magistral’nogo gazoprovoda protyazhennomu bezostanovochno-mu razrusheniyu. Truboprovodnyj transport [Teoriya i praktika], 2009, no. 1, p. 21-23.
7.Makarov G.I. Normativnye trebovaniya po vyazkosti razrusheniya metalla trub magistral’nyh gazoprovodov v otnoshenii ih soprotivlyae-mosti protyazhennym bezostanovochnym razrusheniyam. Truboprovodnyj transport [Teoriya i praktika], 2010, no. 1, p. 17-19.
8.Makarov G.I. Normativnye trebovaniya k vyazkosti razrusheniya trubnyh stalej. Svarochnoe proizvodstvo, 2010, no. 5, p. 36-39.
9.Makarov G.I. K voprosu ucheta vliyaniya prodol’noj sily v teoreticheskoj modeli deformirovaniya truby magistral’nogo gazoprovoda pri protyazhennom bezostanovochnom razrushenii. Truboprovodnyj transport [Teoriya i praktika], 2012, no. 1, p. 48-51.
10. Makarov G.I. Trebovaniya k vyazkosti razrusheniya metalla trub magistral’nyh gazoprovo- dov, garantiruyushchie otsutstvie protyazhennyh bezostanovochnyh razrushenij. Truboprovodnyj transport [Teoriya i praktika], 2013, no. 5, p. 12-16.
11. Makarov G.I. Ekspertnaya ocenka soprotivlyaemosti magistral’nyh gazoprovodov, rabotayushchih na ponizhennyh rezhimah perekachki, rasprostraneniyu protyazhennyh bezostanovochnyh razrushenij. Truboprovodnyj transport [Teoriya i praktika], 2013, no. 6, p. 12-17.
12. Makarov G.I. Sovremennye normativnye trebovaniya po pokazatelyam vyazkosti razrusheniya svarnyh trub bol’shogo diametra dlya magistral’nyh truboprovodov. [Svarka i bezopasnost’]. Trudy II Vserossijskoj nauchno-prakticheskoj konferencii, posvyashchennoj 80-letiyu d.t.n., professora A.P. Ammosova, 10-11 oktyabrya 2017 g. Yakutsk, 2017, p. 48-54.
13. Programma rascheta gazoprovoda na soprotivlyaemost’ protyazhennym razrusheniyam. Svidetel’stvo o gosudarstvennoj registracii programmy dlya EHVM No. 2009614102 ot 3 avgusta 2009 g. G.I. Makarov, pravoobladatel’ OOO «Institut VNIIST».
14. Standart organizacii STO 01297858 0.0095.0-2013. Naturnye ispytaniya trub na razryv s cel’yu opredeleniya vyazkosti razrusheniya. Programma i metodika ispytanij. Razrabotchik: Makarov Geor-gij Ivanovich. M.: VNIIST, 2013, 22 p.
15. Makarov G.I., Glazunov S.P. O primenenii vysokoprochnyh i vysokovyazkih trub povyshennyh kategorij kachestva novogo pokoleniya dlya magistral’nyh truboprovodov. Nauchno-tekhnicheskij i proizvodstvennyj zhurnal neftegazovogo stroitel’stva. «NGS», 2012, no. 1, p. 20-29.
16. Makarov G.I. Strategiya tekhnicheskoj politiki modernizacii sistem truboprovodnogo transporta nefti i gaza. Svarochnoe proizvodstvo, 2013, no. 9, p. 44-48.
17. Makarov G.I. Magistral’nyj put’ dlya magistral’nyh truboprovodov. Perspektivy ispol’zovaniya svarnyh vysokoprochnyh trub. Delovoj zhurnal Neftegaz.RU, 2013, no. 1-2, p. 64-69.
18. Makarov G.I. Modernization of Systems of Pipeline Transport of Gas and Oil. Welding International, 2014, vol. 28, no. 9, p. 744-747.
19. Makarov G.I. Po stupenyam normativnoj ierarhii. Podtverzhdenie sootvetstviya trub bol’sho-go diametra dlya magistral’nyh gazoprovodov normativnym trebovaniyam po pokazatelyam vyazkosti razrusheniya. Delovoj zhurnal Neftegaz.RU, 2014, no. 5, p. 18-22.
20. Makarov G.I. Trubnyj vopros. Normirovanie i tekhnicheskoe regulirovanie kachestva trubnoj produkcii dlya magistral’nyh truboprovodov v usloviyah importozameshcheniya. Delovoj zhurnal Neftegaz.RU, 2015, no. 5, p. 12-17.
21. Makarov G.I. Regulirovanie kachestva trub. Principy razrabotki federal’nyh normativnyh dokumentov, reglamentiruyushchih svojstva trubnoj produkcii dlya magistral’nyh truboprovodov v usloviyah importozameshcheniya. Delovoj zhurnal Neftegaz.RU, 2015, no. 11-12, p. 14-20.
22. Makarov G.I. Strategiya tekhnicheskoj politiki. Strategiya tekhnicheskoj politiki v proektirovanii, stroitel’stve i ehkspluatacii sistem truboprovodnogo transporta nefti i gaza. Delovoj zhurnal Neftegaz.RU, 2016, no. 11-12, p. 20-25.