Published June - July 2023, Pg. 49-59

Section: Oil and gas preparing and transportation

UOT: 621.646.8

DOI: 10.37474/0365-8554/ 2023-06-07-49-59

Analysis of safety factors in the calculation of strength by internal pressure of oil and gas field and main pipeline systems

F.H. Seyidli - “Geotechnological Problems of Oil, Gas and Chemistry” SRI

J.N. Aslanov - “Geotechnological Problems of Oil, Gas and Chemistry” SRI

The article is devoted to the analysis of the safety factors used in the calculations for the internal pressure strength of oil and gas pipelines. A number of national, regional and international normative technical documents regulating the design of pipelines were considered. The safety factors provided in these documents in the calculation of the strength of pipelines are analyzed. For a comparative estimation, mathematical models were developed. As a result of the analyzes, the use of a safety factors for the yield strength of pipe material was recognized as more acceptable in calculating the strength of pipelines. The authors give recommendations on the choice of safety factors depending on the mode of operation and the type of transported hydrocarbon products. AzDTN2.2-9 is the only regulatory document in force in the territory of the Republic of Azerbaijan in this sphere. As this document does not meet modern criteria and is morally outdated, it was considered expedient to develop a new regulatory and technical act taking into account the suggestions made.

References:

1. AzDTN 2.9-2:2009 Magistral Boru Kemerlerinin Layihelendirme Normalary, 78 s.

2. SNiP 2.05.06-85* Magistral´nye truboprovody, 118 с.

3. STO Gazprom 2-2.1-383:2009. Normy proyektirovaniya promyslovykh truboprovodov, 2009, 141 s.

4. QOSTP 54382:2011. Podvodnye truboprovodnye sistemy. Obshchie tekhnicheskie trebovaniya, 274 s.

5. ASME 31.8:2020 Gas Transmission and Distribution Piping Systems, 224 p.

6. ASME 31.4:2019 Transportation Systems for Liquid Hydrocarbons and other Liquids,138 p.

7. ISO 13623:2017 Petroleum and Natural Gas Industries - Pipeline Transportation Systems, 84 p.

8. CSA Z662:19  Canadian Standard Oil and Gas Pipeline Systems, 922 p.

9. BS 8010 2:2017 Pipelines on land: Section 2.8 Steel for oil and gas, 57 p.

10. BS 8010 3:2019 Part 3: Pipelines subsea:: Section 4.2 Steel for oil and gas, 83 p.

11. API RP 1111:2015 Design, Construction, Operation and Maintenance of Offshore  Hydrocarbon  Pipelines. 58 p.

12. DNV-OSF101:2015 Submarine Pipeline Systems. 238 p.

13. ABS -2018 Subsea pipeline systems, 174 p.

14. RMR  ND  N2 -020301-002;2009. Pravila klassifikatsii i postroyki morskikh podvodnykh truboprovodov, 205 s.