Stress-strain state testing of metal structures at site facilities of pipeline transportation of oil and oil products: state and prospects

UDK: 622.692.4.004.58
DOI: 10.24887/0028-2448-2019-11-144-148
Key words: main pipelines, site facilities, pipelines, metal structures, equipment, stress-strain state, diagnostics during operation, magnetic and ultrasonic methods of control
Authors: L.Yu. Mogilner (The Pipeline Transport Institute LLC, RF, Moscow), N.N. Skuridin (The Pipeline Transport Institute LLC, RF, Moscow), E.P. Studenov (The Pipeline Transport Institute LLC, RF, Moscow)

In the literature data, much less attention is paid to the study of the stress-strain state of pipelines and metal structures of site facilities than to similar objects of the linear part of main pipelines. This article analyzes the capabilities, advantages and disadvantages of existing approaches to the experimental determination of the parameters of the stress-strain state of technological pipelines and other metal structures used at oil pumping stations and tank farms. For these products, characteristic sizes range fr om several tens of centimeters to several meters. This is a significant difference fr om the linear part, wh ere the characteristic length starts from ten meters (the length of one pipe section).The possibilities of application of tensometry, optical, magnetic and ultrasonic methods are considered. Examples of attempts to practical implementation of these methods at site facilities are given, and problems that hinder the implementation of these methods in the practice of diagnosing objects during operation are noted. Among these problems, the main ones include the following. As a rule, there is no information about the initial state of the metal structure before operation and the history of their loading during operation, the chemical composition and methods of manufacturing controlled metal structures vary widely, the results of measuring and calculating the parameters of the stress-strain state depend on the chemical composition and method of manufacturing metal structures, there are no generally accepted established requirements for samples for standardization of mechanical stresses in a metal. The article states that it is advisable to measure the parameters of the stress-strain state of metal structures using a set of complementary methods. It is also advisable to supplement these measurements with calculation methods for determining stresses. It is noted that currently there are no methods that fully meet the requirements for measuring the parameters of the stress-strain state of metal structures as part of the site facilities of trunk pipelines. Promising methods for determining the stress-strain state are noted.

References

1. Makhutov N.A., Prochnost' i bezopasnost': fundamental'nye i prikladnye issledovaniya (Strength and safety: fundamental and applied research), Novosibirsk: Nauka Publ., 2008, 528 p.

2. Lisin Yu.V., Ermish S.V., Makhutov N.A. et al., Impact of stress-strain state of the pipeline on the lim it state of the pipeline (In Russ.), Nauka i tehnologiya truboprovodnogo transporta nefti i nefteproduktov = Science & Technologies: Oil and Oil Products Pipeline Transportation, 2017, V. 7, no. 4, pp. 12–16.

3. Neganov D.A., Basics of deterministic normative methods of pipeline strength substantiation (In Russ.), Nauka i tehnologiya truboprovodnogo transporta nefti i nefteproduktov = Science & Technologies: Oil and Oil Products Pipeline Transportation, 2018, V. 8, no. 6, pp. 608–617.

4. Erekhinskiy B.A., Maslakov S.V., Shustov N.I., Cracking of metal housings of Christmas-tree gate valves of northern fields gas producers (In Russ.), Territoriya Neftegaz, 2014, no. 2, pp. 31–36.

5. Lyapishev D.M., Zhitomirskiy B.L., Modern approaches to the organization of monitoring of stress strain behavior of process pipelines and compressor plants (In Russ.), Gazovaya promyshlennost', 2016, no. 11, pp. 46–53.

6. Egorov F.A., Neugodnikov A.P., Veliyulin I.I., The study of the stress-strain state of the pipes of the main pipeline using fiber-optic strain gauges (In Russ.), Territoriya Neftegaz, 2011, no. 10, pp. 26–29.

7. Islamov R.R. et al., Determination of longitudinal mechanical stresses in pipeline based on data fiber optic sensors for measuring strain (In Russ.), Oborudovanie i tekhnologii dlya neftegazovogo kompleksa, 2016, no. 5, pp. 45–50.

8. Gorkunov E.S., Efimov A.G., Shubochkin A.E. et al., Modern approaches to the organization of monitoring of stress strain behavior of process pipelines and compressor plants (In Russ.), V mire nerazrushayushchego kontrolya, 2016, V. 19, no. 3, pp. 43–46.

9. Antonov A.A., Letunovsky A.P., Possibilities of assessment of residual stress in welded designs (In Russ.), V mire nerazrushayushchego kontrolya, 2018, V. 21, no. 1, pp. 10–12.

10. Kuzmitskiy M.L., Ksenofontov N.M., Challenges of stress measuring methods application on the structural assessment of navigation facilities machinery (In Russ.), V mire nerazrushayushchego kontrolya, 2018, V. 21, no. 1, pp. 14–18.

11. Zhukov S.V., Kopitsa N.N., Defect – condition of destruction (In Russ.), Truboprovodnyy transport. Teoriya i praktika, 2006, no. 1, pp. 84–87.

12. Mekhontsev Yu.Ya., Magnitouprugie datchiki dlya issledovaniya ostatochnykh napryazheniy (Magnetoelastic sensors for residual stress testing), In: Ostatochnye napryazheniya v zagotovkakh i detalyakh krupnykh mashin (Residual stresses in the workpieces and parts of large machines), Sverdlovsk: Publ. of NIITYaZhMASh, 1971.

13. Aginey R.V., Islamov R.R., Mamedova E.A., Determination of stress-strain state of the pressure pipeline section by the coercive force measurement results (In Russ.), Nauka i tehnologiya truboprovodnogo transporta nefti i nefteproduktov = Science & Technologies: Oil and Oil Products Pipeline Transportation, 2019, no. 3, pp. 284–298.

14. Vengrinovich V.L., Vintov D.A., Prudnikov A.N. et al., Peculiarities of internal stress measurement in ferromagnetic materials using barkhausen effect and other magnetic techniques (In Russ.), V mire nerazrushayushchego kontrolya, 2018, V. 21, no. 1, pp. 5–9.

15. Dymkin G.Ya., Krasnobryzhii S.A., Shevelev A.V., An ultrasonic method for measuring residual mechanical stresses in the rims of solid-rolled railroad wheels that considers the intrinsic anisotropy of the material (In Russ.), Defektoskopiya = Russian Journal of Nondestructive Testing, 2013, V. 49, no. 1, pp. 8–14.

16. Volkova L.V., Murav'eva O.V., Murav'ev V.V., Buldakova I.V., Device and methods for measuring of acoustic anisotropy and the residual stress in the main gas pipelines’ metal (In Russ.), Pribory i metody izmereniy, 2019, V. 10, no. 1, pp. 42–52.

17. Aleshin N.P., Baranov V.Yu., Bezsmertnyy S.P., Mogil'ner L.Yu., The effect of anisotropy of the elastic properties of rolled products on the detection of defects during ultrasonic quality control of welding large diameter pipes (In Russ.), Defektoskopiya, 1988, no. 6, pp. 80–86.


18. Mogil'ner L.Yu., Vremenko A.V., Skuridin N.N., Pridein O.A., The use of electromagnetic and acoustic thickness gauges in the diagnostics of metal structures and mechanical process equipment (In Russ.), Nauka i tehnologiya truboprovodnogo transporta nefti i nefteproduktov = Science & Technologies: Oil and Oil Products Pipeline Transportation, 2019, no. 3, pp. 315–325.

In the literature data, much less attention is paid to the study of the stress-strain state of pipelines and metal structures of site facilities than to similar objects of the linear part of main pipelines. This article analyzes the capabilities, advantages and disadvantages of existing approaches to the experimental determination of the parameters of the stress-strain state of technological pipelines and other metal structures used at oil pumping stations and tank farms. For these products, characteristic sizes range fr om several tens of centimeters to several meters. This is a significant difference fr om the linear part, wh ere the characteristic length starts from ten meters (the length of one pipe section).The possibilities of application of tensometry, optical, magnetic and ultrasonic methods are considered. Examples of attempts to practical implementation of these methods at site facilities are given, and problems that hinder the implementation of these methods in the practice of diagnosing objects during operation are noted. Among these problems, the main ones include the following. As a rule, there is no information about the initial state of the metal structure before operation and the history of their loading during operation, the chemical composition and methods of manufacturing controlled metal structures vary widely, the results of measuring and calculating the parameters of the stress-strain state depend on the chemical composition and method of manufacturing metal structures, there are no generally accepted established requirements for samples for standardization of mechanical stresses in a metal. The article states that it is advisable to measure the parameters of the stress-strain state of metal structures using a set of complementary methods. It is also advisable to supplement these measurements with calculation methods for determining stresses. It is noted that currently there are no methods that fully meet the requirements for measuring the parameters of the stress-strain state of metal structures as part of the site facilities of trunk pipelines. Promising methods for determining the stress-strain state are noted.

References

1. Makhutov N.A., Prochnost' i bezopasnost': fundamental'nye i prikladnye issledovaniya (Strength and safety: fundamental and applied research), Novosibirsk: Nauka Publ., 2008, 528 p.

2. Lisin Yu.V., Ermish S.V., Makhutov N.A. et al., Impact of stress-strain state of the pipeline on the lim it state of the pipeline (In Russ.), Nauka i tehnologiya truboprovodnogo transporta nefti i nefteproduktov = Science & Technologies: Oil and Oil Products Pipeline Transportation, 2017, V. 7, no. 4, pp. 12–16.

3. Neganov D.A., Basics of deterministic normative methods of pipeline strength substantiation (In Russ.), Nauka i tehnologiya truboprovodnogo transporta nefti i nefteproduktov = Science & Technologies: Oil and Oil Products Pipeline Transportation, 2018, V. 8, no. 6, pp. 608–617.

4. Erekhinskiy B.A., Maslakov S.V., Shustov N.I., Cracking of metal housings of Christmas-tree gate valves of northern fields gas producers (In Russ.), Territoriya Neftegaz, 2014, no. 2, pp. 31–36.

5. Lyapishev D.M., Zhitomirskiy B.L., Modern approaches to the organization of monitoring of stress strain behavior of process pipelines and compressor plants (In Russ.), Gazovaya promyshlennost', 2016, no. 11, pp. 46–53.

6. Egorov F.A., Neugodnikov A.P., Veliyulin I.I., The study of the stress-strain state of the pipes of the main pipeline using fiber-optic strain gauges (In Russ.), Territoriya Neftegaz, 2011, no. 10, pp. 26–29.

7. Islamov R.R. et al., Determination of longitudinal mechanical stresses in pipeline based on data fiber optic sensors for measuring strain (In Russ.), Oborudovanie i tekhnologii dlya neftegazovogo kompleksa, 2016, no. 5, pp. 45–50.

8. Gorkunov E.S., Efimov A.G., Shubochkin A.E. et al., Modern approaches to the organization of monitoring of stress strain behavior of process pipelines and compressor plants (In Russ.), V mire nerazrushayushchego kontrolya, 2016, V. 19, no. 3, pp. 43–46.

9. Antonov A.A., Letunovsky A.P., Possibilities of assessment of residual stress in welded designs (In Russ.), V mire nerazrushayushchego kontrolya, 2018, V. 21, no. 1, pp. 10–12.

10. Kuzmitskiy M.L., Ksenofontov N.M., Challenges of stress measuring methods application on the structural assessment of navigation facilities machinery (In Russ.), V mire nerazrushayushchego kontrolya, 2018, V. 21, no. 1, pp. 14–18.

11. Zhukov S.V., Kopitsa N.N., Defect – condition of destruction (In Russ.), Truboprovodnyy transport. Teoriya i praktika, 2006, no. 1, pp. 84–87.

12. Mekhontsev Yu.Ya., Magnitouprugie datchiki dlya issledovaniya ostatochnykh napryazheniy (Magnetoelastic sensors for residual stress testing), In: Ostatochnye napryazheniya v zagotovkakh i detalyakh krupnykh mashin (Residual stresses in the workpieces and parts of large machines), Sverdlovsk: Publ. of NIITYaZhMASh, 1971.

13. Aginey R.V., Islamov R.R., Mamedova E.A., Determination of stress-strain state of the pressure pipeline section by the coercive force measurement results (In Russ.), Nauka i tehnologiya truboprovodnogo transporta nefti i nefteproduktov = Science & Technologies: Oil and Oil Products Pipeline Transportation, 2019, no. 3, pp. 284–298.

14. Vengrinovich V.L., Vintov D.A., Prudnikov A.N. et al., Peculiarities of internal stress measurement in ferromagnetic materials using barkhausen effect and other magnetic techniques (In Russ.), V mire nerazrushayushchego kontrolya, 2018, V. 21, no. 1, pp. 5–9.

15. Dymkin G.Ya., Krasnobryzhii S.A., Shevelev A.V., An ultrasonic method for measuring residual mechanical stresses in the rims of solid-rolled railroad wheels that considers the intrinsic anisotropy of the material (In Russ.), Defektoskopiya = Russian Journal of Nondestructive Testing, 2013, V. 49, no. 1, pp. 8–14.

16. Volkova L.V., Murav'eva O.V., Murav'ev V.V., Buldakova I.V., Device and methods for measuring of acoustic anisotropy and the residual stress in the main gas pipelines’ metal (In Russ.), Pribory i metody izmereniy, 2019, V. 10, no. 1, pp. 42–52.

17. Aleshin N.P., Baranov V.Yu., Bezsmertnyy S.P., Mogil'ner L.Yu., The effect of anisotropy of the elastic properties of rolled products on the detection of defects during ultrasonic quality control of welding large diameter pipes (In Russ.), Defektoskopiya, 1988, no. 6, pp. 80–86.


18. Mogil'ner L.Yu., Vremenko A.V., Skuridin N.N., Pridein O.A., The use of electromagnetic and acoustic thickness gauges in the diagnostics of metal structures and mechanical process equipment (In Russ.), Nauka i tehnologiya truboprovodnogo transporta nefti i nefteproduktov = Science & Technologies: Oil and Oil Products Pipeline Transportation, 2019, no. 3, pp. 315–325.


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