УДК 622.691.4.07+621.644.07
(UDK 622.691.4.07+621.644.07)
(AGEING OF EX WORKS POLYETHYLENE COATING DURING PIPE STORAGE ON OPEN SITES)
The organization of pipe storage in base and line conditions depends on location, time and conditions of storage, range of pipe products, availability and type of protective coating and is linked to production capabilities and availability of financing. The requirements to storage conditions, which are specified in departmental and national documents, are being improved in stages as experience is gained and logistical capabilities are developed. To date, protection against UV radiation is not mandatorily provided by current all-Russian normative documents, regulating rules of factory coated pipes storage.
The paper analyses basic industry documents containing requirements to storage, inspection and repair of polyethylene pipe coatings. It presents the results of laboratory tests carried out at Gazprom VNIIGAZ LLC of polyethylene pipe coatings stored at open-air sites for 3-12 years in Northern, Central and Southern regions. The classification of the ultraviolet radiation hazard level depending on its intensity, geographical and topographic factors is given. Recommendations for protection of polyethylene coatings against UV radiation when storing pipes in open areas are given.
E.V. Petrusenko1, e-mail: E_Petrusenko@vniigaz.gazprom.ru;
P.V. Golivkin1, e-mail: P_Golivkin@vniigaz.gazprom.ru;
A.E. Zaitsev1, e-mail: A_Zaytsev@vniigaz.gazprom.ru
1 Gazprom VNIIGAZ LLC (Moscow, Russia).
Sazonov A.P., Petrusenko E.V., Retivykh M.V., Rakhimova A.A. Development and Certification of External Anticorrosive Polyethylene Coatings of Pipe Products for Gazprom PJSC. Korrozija “Territorii ‘NEFTEGAS’” [Corrosion of Oil and Gas Territory]. 2021;2(46):36–39. (In Russ.)
Company Standard (STO) Gazprom 2-2.2-130-2007. Technical Requirements for External Anticorrosive Polyethylene Coatings of Factory Applied Pipes for Construction, Reconstruction and Major Repairs of Underground and Offshore Gas Pipelines with Operating Temperature up to 80 °C. Moscow: Information and Promotional Center Gazprom JSC; 2007. (In Russ.)
Departmental Guidance Document (VRD) 39-1.10-026-2001. Methodology for Assessment of Actual Position and Condition of Underground Pipelines. Weblog. Available from: https://files.stroyinf.ru/Data2/1/4293847/4293847774.htm [Accessed 16 December 2021]. (In Russ.)
Bykov I.Y., Pak A.L. On the Causes of Cracks in Polyethylene Factory Pipe Coatings During Pipe Storage at Low Temperatures. Inzhener-neftyanik [Engineer-oilman]. 2014;(2):30–32. (In Russ.)
Petrusenko E.V., Zaitsev A.E. Causes of Cracking of Factory Polyethylene Pipe Coating and Factors Contributing to Resistance of Coatings to Cracking. Korrozija “Territorii ‘NEFTEGAS’” [Corrosion of Oil and Gas Territory]. 2021;2(46):40–44. (In Russ.)
Handbook of Instructions (SP) 86.13330.2014. Code of Practice. Main (Trunk) Pipelines. Weblog. Available from: https://docs.cntd.ru/document/1200111111 [Accessed 16 December 2021]. (In Russ.)
DNV-RP-F106. Factory Applied External Pipeline Coatings for Corrosion Control. Recommeded Practice. 19th Edition, September 2021.
ISO 21809-1:2011. Petroleum and Natural Gas Industries – External Coatings for Buried or Submerged Pipelines Used in Pipeline Transportation Systems. Part 1: Polyolefin Coatings (3-Layer PE and 3-Layer PP).
Industry Regulations ОР-03.100.50-КТН-120-10. Organisation of Construction and Installation Works Using Factory Insulated Pipes. Technical Requirements and Equipment. (In Russ.)
Company Recommendations R Gazprom 9.1-063-2020. Corrosion Protection. External Anticorrosive Polyethylene Coating of Factory-Applied Pipes. Instructions for Repair of Damaged Areas. (In Russ.)
Interstate Standard (GOST) 9.602-2016. Unified System of Corrosion and Ageing Protection. Underground Constructions. General Requirements for Corrosion Protection. Weblog. Available from: https://docs.cntd.ru/document/1200140210 [Accessed 16 December 2021]. (In Russ.)
State Standard of the RF (GOST) Р 51164-98. Steel Pipe Mains. General Requirements for Corrosion Protection. Weblog. Available from: https://docs.cntd.ru/document/1200001879 [Accessed 16 December 2021]. (In Russ.)
Novoselov F.A. Development of Methods for Diagnosing the Integrity of Pipe Protective Coatings During Construction of Main Gas Pipelines: Thesis Abstract of the Cand. in Engineering Sciences. Мoscow; 2013. (In Russ.)
Nakhaev M.I., Ananyev L.B., Ivanova N.S. et al. Ultraviolet Irradiance, UV-Index and Their Forecasting. Trudy gidrometerologicheskogo nauchnoissledovatel'skogo tsentra Rossiyskoy Federatsii [Proceedings of the Hydrometeorological Research Center of the Russian Federation]. 2014;(351):173–187. (In Russ.)