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    大港油建公司承建的天津南港LNG應急儲備22萬方薄膜罐項目順利通過氨氮試驗

    字體: 放大字體  縮小字體 發布日期:2024-07-30  來源:大港油建公司  瀏覽次數:350
            這一試驗是評估薄膜罐密閉性的關鍵步驟,其結果直接反映了內罐薄膜系統的施工質量。在此次測試中,大港油建公司負責的7號罐表現卓越,僅發現48個漏點,顯著低于法國GTT公司設定的100個漏點標準。在同期進行的二、三階段6具薄膜罐的測試中,7號罐以優異成績位居榜首。這次試驗不僅驗證了薄膜罐主屏蔽層的卓越質量和性能,也彰顯了大港油建公司在管理與施工技術上的實力。

     

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           氨氮試驗的執行過程涉及在波紋板表面噴涂黃色顯影劑,并在IBS空間(主保溫屏蔽空間)內注入氨氮混合氣體,維持正壓環境。當氨氣在焊接缺陷處泄漏時,與顯影劑接觸即發生顏色變化,實現漏點的精確定位。此檢測方法的靈敏度遠超傳統滲透檢測,為儲罐的安全運行提供了堅實的保障。

    值得一提的是,LNG薄膜罐技術代表了液化天然氣大型儲罐領域的前沿技術水平。該項目也是大港油建公司乃至管道局首次承接的大型LNG薄膜罐項目。為確保項目的高質量完成,大港油建公司提前做好硬件投入和人員技術儲備,建設完成MarkⅢ型陸地薄膜罐模擬艙,并于2023年取得法國GTT公司頒發的認證證書,相關人員也通過了資格考試認證,具備了承攬該項目的準入資格。項目施工中,團隊全體參建人員不畏艱難,邊干邊學邊研究邊提升,成功克服了施工中的重重挑戰,完成了從理論到實踐的蛻變。

    This test is a key step in eva luating the tightness of the membrane tank, and its results directly reflect the construction quality of the membrane system of the inner tank. In this test, tank 7, operated by Dagang Oil Construction Company, performed well, with only 48 leak points found, significantly lower than the 100 leak point standard set by French GTT company. In the same period of the second and third stage of 6 film tank tests, tank 7 ranked first with excellent results. This test not only verified the excellent quality and performance of the main shielding layer of the film tank, but also demonstrated the strength of Dagang Oil Construction Company in management and construction technology.

    The execution process of the ammonia nitrogen test involves spraying yellow developer on the surface of the corrugated plate and injecting ammonia nitrogen mixture into the IBS space (the main insulation shielding space) to maintain a positive pressure environment. When the ammonia gas leaks at the welding defect, the color changes when it contacts with the developer, and the accurate location of the leak point is realized. The sensitivity of this detection method is much higher than that of the traditional penetration detection, which provides a solid guarantee for the safe operation of the storage tank.

    It is worth mentioning that LNG thin film tank technology represents the cutting-edge technology level in the field of LNG large storage tanks. This project is also the first large-scale LNG thin film tank project undertaken by Dagang Oil Construction Company and even the Pipeline Bureau. In order to ensure the high-quality completion of the project, Dagang Oil Construction Company has made hardware investment and personnel technical reserve in advance, completed the construction of Mark III land film tank simulation cabin, and obtained the certification issued by GTT Company of France in 2023, and the relevant personnel have passed the qualification examination certification, with the access qualification of the project. In the construction of the project, all the team members were not afraid of difficulties, and they successfully overcame many challenges in the construction and completed the transformation from theory to practice.

     
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