Effects　of　Oil　Temperature　Change　in　a　Petrole以m　Pipeline on　Accuracy　of　the　Leak　Detection（Ⅲ） -Experiments　on　a　Model　Pipeline

Abstract

This　paper　is　a　report of experiments on a model pipeline，conducted to verify the theory that oil　temperature　change　in　a　petroleum　pipeline　causes　IN-OUT　flow　differential　as　described　in　part I　of　this　series． The　model　pipeline　consists　of　copper　pipe　with　heater　and　fresh　water　was　used　under　a　cons－tant　inlet　pressure．　A　numerical　calculation　was　also　executed　considering　variations　of　viscosity，How and　temperature　distribution　caused　by　oil　temperature　change， As　the　results　of　the　experiments，the　analytical　calculation　and　the　numerical　calculation，the propriety　of　the　theory　was　veriHed　alld　it　was　revealed　that　this　theory　is　applicable　to　any　pipeline operated　under　not　only　constant　flow　condition　but　also　other　opemting　conditions.