From September 14 to September 15, 2023, relevant experts from Dalian Shenlan Pump Co., Ltd. and Shanghai Zhongshen Technology Co., Ltd. witnessed the pressure resistance test, leakage rate test, insulation resistance test and dielectric strength test of low-temperature electrical penetration joint of Sinopec Longkou LNG Receiving Station in our company, and the test results all met the factory requirements; Check and verify product appearance and nameplate; The size of the product was reviewed, and the documentation related to the quality of the low-temperature electrical penetration joint was also consulted. Through the on-site test witness, product appearance inspection and quality certification documents, the results are in line with the contract and related requirements.