江西天然气管道交流干扰检测与防护_杜艳霞.pdf

2014 1 33 1 1000-8241 2014 01-0056-05 1. 1000832. 100029 - - DD CEN TS 15280 2006 GB/T 50698- 2011 6410 TE88 A doi 10.6047/j.issn.1000-8241.2014.01.011 Detection and prevention of AC interference in Jiangxi Natural Gas Pipeline 1 1 2 DU Yanxia , SHA Xiaodong , LIU Xiao 1. Corrosion and Protection Center, University of Science and Technology Beijing, Beijing, 100083; 2. SINOPEC Gas Company, Beijing, 100029 Abstract: Several sections of a pipeline operated by Jiangxi Natural Gas Co. Ltd., are close to high-voltage power line or electrifi ed railway. In order to comprehensively evaluate the AC interference risk of these pipe sections, preliminary and detailed detection on AC interference have been conducted according to the European DD CEN-TS 15280-2006 and China GB/T 50698-2011. The detection parameters include AC interference voltage, AC density, the ratio of AC density to DC density and soil resistivity. The places seriously infl uenced by AC interference are selected to conduct the fi eld remission test and design calculation. The AC interference prevention scheme is established accordingly. In the places where the pipes are severely interfered, the zinc remission strip is laid parallel to the pipes, and the decouplers are installed between the remission strip and the pi