輸氣管道閥室的工藝系統(tǒng)防雷接地設計探討

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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

在長距離輸氣管道工程中，為確保事故工況下能夠截斷管道，同時也為了便于管道的分段維護，每隔一段距離在管道上設置閥門，用于截斷管道內(nèi)天然氣的流動，該閥門和相關設施組成輸氣管道的閥室。（剩余6222字）