输气管道阀室的工艺系统防雷接地设计探讨

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DOI：10.3969/j.issn.1001-2206.2025.03.006

Discussion on lightning grounding design for process systems in gas pipeline valve chambers

ZHANG Huade Sinopec Petroleum Engineering Corporation，Dongying 257O26， China

Abstract：Inpipelievalvechambersequippedwithcathodicprotectionsystems，directgroundingisnotalowedtopreventteleakage of thecatodicprotectioncurrnt.Teexposedstlpipelinesforlghtningprotectionedtoegroundedceatingacoflicths studyreviewedcurrentstandardsandspecificationsrelatedtolghtningprotectionantistaticmeasures，ndcathodicprotetionand summarizedthelightninggroundingrequirementsforrelevantfaclitiesinthevalvechambers.Toresolvetheaboveconflict，aethod involvingisoateddischargegapgroundingforexposed pipelines wasproposed.Byanalyzing thevoltagewithstandlevelsofmaterialsin the processsystemsandcathodicprotectionsystems inthevalvechambers，theprotectivevoltagelevelfortheisolateddischargegap groundingofpipelineswasdetermined.Thenumberofisolateddischargegapswascalculatedbasedonthelghtningcurentdiversion coeficient.Acomprehensivelghtninggroundingdesignschemeforprocessystems invalvechamberswasdeveloped.Byestablishing mathematicalodelsforteprocsstems，ightinguret，andiolateddischargegapsinalvechambers，teoreticallation calculationsecodctedtestesiallghtgdshaevolageoelpipes，isuatigjintsdstattal devices，awellasthlngurrntpassingtoughtesolateddscargegaps.Tiulationsultserifdteivsand feasibility of the proposed design.

Keywords：isolated discharge gap; lightning grounding; cathodic protection; valve chamber

在长距离输气管道工程中，为确保事故工况下能够截断管道，同时也为了便于管道的分段维护，每隔一段距离在管道上设置阀门，用于截断管道内天然气的流动，该阀门和相关设施组成输气管道的阀室。（剩余6222字）