Seeing that the leading experts listened attentively, Shen Huan became more confident.
"As we build more and more LNG terminals, we need more LNG carriers to match.
According to the current data, I believe that by ten years, the LNG terminal built in China may have a receiving capacity of more than 30 million tons!
” "Based on a 170,000-square-meter LNG ship, a round-trip capacity of 500,000 to 1 million tons can be achieved in a year, so calculated, our country's future demand for LNG ships will reach 40 or more."
"At present, there are actually less than 10 shipyards in the world that have the capacity to build LNG ships, but Asian shipyards are gradually starting to occupy this market.
However, the development of LNG ships is inseparable from supporting industries, especially the localization of high-end materials and mechanical and electrical equipment, which requires us to gather the strength of our national shipbuilding industry in order to create our LNG ship industry cluster. ” "Take our neighbors as an example, the stick shipbuilding industry has a very complete LNG ship support, such as polyurethane foam board, stainless steel corrugated board, glass wool, rigid insulation, flexible insulation and other liquid tank enclosure system components, special cryogenic valves, cryogenic pipe insulation materials, dual-fuel engines, cryogenic gas compressors, reliquefaction devices, etc."
"And we are still in the beginning, so our LNG ship will definitely be longer than similar foreign products, the construction period is longer, such as the supporting equipment and cryogenic materials we need, can only be imported from abroad, the price is high, the order cycle is long, not to mention, the commissioning service may also be constrained, on-site construction encounters materials, parts and components supplement problems, may fall into a long wait, this is our disadvantage, we need to concentrate the strength of the entire shipbuilding industry to break this barrier."
Shen Huan's words made the leaders and experts present fall into deep thought.
Indeed, the first LNG ship not only imported most of the supporting equipment and materials, but also cooperated with European Atlantic shipyards in terms of design and construction, that is, the construction standards, and introduced hundreds of European standards, which are concentrated in the cargo tank enclosure system, loading and unloading system, turbine system and other parts.
You must know that the entire LNG ship is divided into the first tank, the first fuel tank, the cargo hold area, the engine room, and the tail tank, and then subdivided into more than 200 sections, which are manufactured and spliced into the dock into a huge hull.
The cargo hold of the 147,000 cubic meter LNG ship is the core part, which consists of four extra-large ultra-low temperature insulated cargo holds.
How were these cargo holds built?
The process is too complicated.
More than 50,000 insulated boxes, forming the inner wall, are then covered with 0.7 mm thick Yin tile steel film and welded.
This kind of welding is quite difficult, because if you are not careful, you may weld through and ignite the insulated box at the back.
Because these insulated boxes are made of special wood imported from Malaysia, they are filled with perlite powder, which is flammable.
Jin Hanlin muttered: "Comrade Shen Huan has a long way to go, everyone, the future development of our top LNG carriers in China's shipbuilding industry depends on everyone's joint efforts!"
” Zhao Yongjie said busily: "Chairman, please rest assured, we will definitely build our first LNG ship in accordance with the instructions of our superiors, and digest and absorb relevant technologies to form our independent intellectual property rights."
Of course, we are also very clear about the difficulty of this, so we should ask Comrade Yang Haifeng, the chief engineer of our company, to talk about it!
” Jin Hanlin nodded and said, "Well, then please ask Chief Engineer Yang to talk about it!"
” Yang Haifeng, the chief engineer of Wudong-Zhonghua Shipbuilding Co., Ltd., a man about fifty years old, also has a face full of confidence.
"Chairman, leaders, our LNG ships are technically more demanding than any type of ship.
The first is the service life, which requires the hull to have a service life of more than 40 years. ” "Secondly, the huge and complex cryogenic alarm network, more than 3,000 cryogenic alarm points, and the total length of more than 100 kilometers of welds in the cargo hold area of the whole ship, if there is a little mistake and cause leakage, it will be fatal to the entire LNG ship."
"Of course, there are also the terms of the contract we signed with the shipowner, which are also quite strict, if the delivery date is delayed by one day, the fine is 150,000 US dollars; One centimeter of draft error is a million dollars in fines, and so on!
” "Of course, the most important thing is the cargo containment system, which is GTT's patented technology and the core technology of LNG carriers.
"The key point is the production and installation technology of insulating boxes, as well as film installation and welding technology, tightness test technology, as well as special installation platform manufacturing, installation and disassembly technology, etc.
In the case of the installation platform, there are tens of thousands of parts, which are the technologies that we need to master and improve. ” When Yang Haifeng said this, everyone present felt an invisible pressure.
Shen Huan also remembered that Wudong-Zhonghua Shipyard has been working hard to realize the localization of key equipment and materials for LNG ships, such as low-temperature stainless steel pipes for LNG ships, and began to fully apply domestic ones in the construction of the seventh LNG ship.
The low-temperature stainless steel pipe for LNG ships requires a design temperature of minus 192 degrees Celsius and a working temperature of minus 163 degrees Celsius, and the first six LNG ships are imported from Europe.
Because the development of this kind of steel pipe is very difficult, you must know that ordinary steel will become fragile at dozens of degrees below zero, let alone withstand this extreme low temperature.
Therefore, Wudong-Zhonghua Shipyard is also actively cultivating supporting suppliers in the LNG industry cluster, and finally completed the localization of low-temperature stainless steel pipes for LNG ships together with supporting suppliers, which not only greatly reduces the cost, but also shortens the cycle.
Of course, not only that, but in the process of localization of LNG carriers, China Shipping Jiaotong University and other institutions of higher learning have also made great contributions.
For example, for the construction of the most critical LNG technology, the low-temperature maintenance system, Wudong-Zhonghua Shipyard cooperated with China Shipping Jiaotong University to solve the problem of LNG low-temperature enclosure system and intelligent manufacturing of LNG ship insulated boxes.
China Shipping Jiaotong University has designed a new automatic production line of insulated box robot with independent intellectual property rights, from blanking, logistics, nailing and filling, the accuracy is above the wire level, this automatic production line is similar to Shen Huan's ship pulsating production line, which can adapt to the manufacture of insulated boxes of different capacity LNG ship types.
Of course, in the field of China's shipbuilding industry, not only Wudong-Zhonghua, but also Jiangnan Changxing Shipbuilding Group is also working hard to carry out the research and development of LNG ships.
It's just that Jiangnan Changxing Shipbuilding Group chose a spherical tank-shaped LNG ship, which is different from the ship type chosen by Wu Dongzhonghua.
The biggest difference between these two types of LNG carriers is the difference in their cargo containment systems.
In 2015, Jiangnan Changxing Shipyard built a 30,000 cubic meter C-type cargo LNG carrier with the world's largest single cargo capacity.