NDLI: Remedial Measures to Tame the Frost Heaves at Gas Distribution Stations in West-East Gas Pipeline

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Deng, Daoming Wang, Xiaoping Li, Kai Jiang, Yongtao Gong, Jing
Copyright Year	2010
Abstract	The first West-East Gas Pipeline, running from the Tarim Basin gas fields in Xinjiang to the Yangtze River Delta area in China, is an 1016-mm-dia, 3900-km-long pipeline, the design capacity and pressure of which are 12 billion cubic meters annually and 10 MPa respectively. The whole pipeline was put into commercial operation on Oct. 2004, and the distribution stations suffered from frost heaves due to subfreezing gas temperatures, with obvious uplifts of valves from the bases, upheavals of the ground, and cracks of the paved surfaces and fence walls, and deformations of gas pipelines. From the commission on, the demand on gas in the downstream market was booming, and the company strove to upgrade the throughput to 17 billion cubic meters annually by building new gas compressor stations, so the more serious frost heaves are expected at the regulator stations. As we know, gas-fueled heaters can effectively tackle the frost heaves, but the difficulty of land acquisition, and more expensive CAPEX and OPEX limit the installation of the gas-fueled heaters. In this paper, various types of measures to cope with the frost heaves are compared and analyzed. Based on the geotechnical survey of field soils, theoretical calculations and actual data, soil replacement schemes with a water migration control technique are developed and successfully applied at different gas distribution stations with different water tables. The schemes are simple to use, and are cost-effective. When the remedial actions with this scheme are conducted, no interruptions of service are required. Furthermore, a large sum of expense is saved in comparison with the gas-fueled heaters.
Sponsorship	International Petroleum Technology Institute and the Pipeline Division
Starting Page	83
Ending Page	90
Page Count	8
File Format	PDF
ISBN	9780791844236
DOI	10.1115/IPC2010-31261
e-ISBN	9780791838853
Volume Number	2010 8th International Pipeline Conference, Volume 4
Conference Proceedings	2010 8th International Pipeline Conference
Language	English
Publisher Date	2010-09-27
Publisher Place	Calgary, Alberta, Canada
Access Restriction	Subscribed
Subject Keyword	Frost heave Distribution station Remediation West-east gas pipeline Pipelines
Content Type	Text
Resource Type	Article

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