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Zhoushan Huafeng completed the first repair of dual fuel ship "Longkou Tiger" with air  

"TIGER LONGKOU" is a liquefied natural gas (LNG) tank deck container dual fuel carrier (700 tank class, length 192.00 m, type width 37.60 m, type depth 13.50 m, design draft 8.2 m, deadweight 25,000 tons), currently the largest in the world.  Jointly developed by Jiangsu Yangzijiang Shipbuilding Group And Tiger Gas and built by Jiangsu New Yangzi Shipbuilding Co., LTD., the new ship was officially delivered in early January this year.  

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The ship can accommodate nearly 700 45-foot tank containers (about 15,000 tons of LNG), meeting the relevant requirements of at least 20 international organizations, countries or regions, realizing "one tank to the bottom" and "door to door" transportation, meeting the energy needs of various regions, in line with the distributed energy supply advocated by China.  As an environmentally friendly, efficient and energy efficient vessel, the ship is equipped with Type C LNG fuel tanks and dual fuel engines. It has a design speed of 16 knots and a range of 5,000 nautical miles in LNG-powered mode, meeting IMO Tier III emissions standards.  

"Longkou Tiger" entered the factory for repair and transformation on January 9, 2022. The main transformation works are as follows: box Angle (dovetail groove) and D-ring (ground order) were added to the outer deck, and the reverse side was strengthened;  MGO(empty status) fuel tank expansion, etc.  

From a long-term point of view of the market, dual fuel ship form will become the latest must-haves in the shipping market, ship repair with natural gas will also be normalized trend, for the ship during the repair of the special requirements of safety, our company and the ship set up project safety coordination committee (VSCC), strict organization planning, to discuss the best safety construction plan,  And the daily safety production requirements throughout the whole process of construction.  

When the ship entered the factory, there was 300 cubic meters of natural gas main engine fuel left in the fuel tank. The company conducted inert sealing treatment for the connected pipeline system around the LNG tank in the cabin as required, and maintained round-the-clock continuous monitoring in the cabin to ensure that the oxygen test and explosion test were qualified.  All construction personnel have undergone professional safety training before boarding, wear antistatic clothing as required, and follow strict construction procedures.  In addition, the safety protection of the liquid cargo hold is strengthened. All the scaffolding in the hold is set up and inspected according to the standard of specially coated scaffolding.  

The ship has completed 900 dovetail grooves and more than 1,000 ground reloading in the plant.  At the same time, the fuel tank was expanded by about 500 cubic meters.  

Dual fuel ship with gas repair, the ship enterprise team (especially safety) requirements are very high, currently there are few implementation cases in the world, this is our company's first attempt, has very important significance.  Through the ship repair, the company has also accumulated rich experience, which has laid a solid foundation for the subsequent repair of this type of ship.