中国石油网消息：3月23日，从管道局设计院获悉由该院渤海分公司自研的LNG海底管道技术方案，通过了中国船级社（CCS）海洋工程技术中心的认证，获得国内首张LNG海底管道原则性批准（AIP）证书。这标志着管道局LNG海底管道技术方案在技术合规性、安全性和可靠性方面得到专业认可。

China Oil News: On March 23rd, it was learned from the Design Institute of the Pipeline Bureau that the LNG submarine pipeline technical solution independently developed by its Bohai Branch has passed the certification of the Marine Engineering Technology Center of China Classification Society (CCS), and obtained the first domestic AIP (Principle Approval for LNG Submarine Pipeline) certificate. This indicates that the pipeline bureau's LNG submarine pipeline technical solution has received professional recognition in terms of technical compliance, safety and reliability.

针对LNG介质超低温工况和浅近海复杂环境条件，管道局设计院渤海分公司系统开展了管道结构设计、低温力学性能分析及运行安全评估等工作，最终形成一套完整、可验证的LNG海底管道技术方案。

In response to the ultra-low temperature conditions of LNG and the complex environmental conditions in the shallow coastal areas, the Bohai Branch of the Pipeline Bureau's Design Institute systematically carried out pipeline structure design, low-temperature mechanical performance analysis, and operation safety assessment, etc. Eventually, a complete and verifiable LNG submarine pipeline technical solution was formed.

该方案采用内外管分离的双层钢管结构，实现了低温介质的稳定输送与管道的安全性的双重保障；利用真空保冷技术与气凝胶材料协同作用，大幅降低LNG输送过程中的热损失，确保超低温输送的高效性；结合浅近海特殊环境，设计了多种应对外压、温差循环等挑战的技术方案，赋予系统在复杂海洋环境中具备较强的适应性和长期运行稳定性，为我国LNG近岸输送工程提供了技术储备和示范支撑。

This scheme adopts a double-layer steel pipe structure with an internal and external tube separation, achieving dual guarantees for the stable transportation of low-temperature media and the safety of the pipeline. By leveraging the synergy of vacuum insulation technology and aerogel materials, it significantly reduces heat loss during LNG transportation, ensuring the efficiency of ultra-low temperature transportation. Considering the special shallow coastal environment, a variety of technical solutions to address challenges such as external pressure and temperature cycling have been designed, endowing the system with strong adaptability and long-term operational stability in complex marine environments, providing technical reserves and demonstration support for China's offshore LNG transportation projects.

AIP证书是中国船级社（CCS）海洋工程技术中心对创新技术概念设计的原则性认可，对推动技术创新、降低技术风险、加速新技术商业化应用具有不可替代的重要作用。

The AIP certificate is the principle recognition given by the Marine Engineering Technology Center of China Classification Society (CCS) for innovative technical concept designs. It plays an irreplaceable and significant role in promoting technological innovation, reducing technical risks, and accelerating the commercial application of new technologies.