Great Power Ship

Chapter 140 Underwater Welding (Subscribe)

Hearing Liu Chengzhi's words, Captain Jafari, who was a little surprised at first, was really surprised now.

He originally thought that the semi-enclosed diving suits used by Zhujiang Factory and others were imported from developed countries in Europe and the United States, but unexpectedly they were made by himself. That incredible feeling is similar to how a nobleman lived in a slum. Like a beautiful princess, it simply subverted Jafari's three views.

You must know that as of the end of the 70s, the living standard in Bosnia was higher than that in China. Even the wealthy Bosnia could only look at the semi-enclosed diving equipment, but the poorer country can make it?

This is simply against the laws of nature.

However, when Jafari was stunned, Sunzi Meijiji, who had been staring at the sea for a long time, suddenly said: "It's been almost half an hour, and there is no movement at all. The person who went down just now will not Are you drowned?"

Waking up with a start, he immediately looked at Liu Chengzhi beside him, his gray eyes were full of doubt and worry.

Yes, whether something can be manufactured is one aspect, and whether it can be used is another aspect. What if the GD-2S semi-enclosed diving equipment is a good-looking product?
After all, China is also a typical developing country, and the disadvantages of poor experience and weak foundation cannot be avoided, so...

Qin Gangsheng is also worried. If the equipment is broken and in place, it can be repaired or replaced; If something goes wrong, it will definitely be a big trouble.

So the anxious Qin Gangsheng hurriedly urged Liu Chengzhi: "Mr. Liu, think of a way, if it doesn't work, I'll call the Port Authority. They have a special rescue team, and we'll talk about bringing people up first!"

"Everyone put their hearts in their stomachs. Our GD-2S semi-enclosed diving equipment can provide 17 hours of operation time at a fixed depth of no more than 2 meters. Now it is less than 40 minutes. The distance It's two hours too early."

Seeing that the people around him were getting nervous, Liu Chengzhi hurriedly spoke out to comfort him, but this sentence aroused Captain Jafari's already sensitive nerves, and asked quickly: "The depth is 17 meters? Could it be that your half Closed diving gear can be adjusted to different diving depths?"

"Of course!" Liu Chengzhi nodded, and at this moment there was a splash on the water near the bow, and a shiny black head appeared. Seeing this, Liu Chengzhi immediately threw down the eager Captain Jafari, pointing Looking at the person emerging from the sea: "See, I said our GD-2S semi-enclosed diving suit is not that bad, Zhang Yongping is not that good!"

During the conversation, Zhang Yongping had already swam to the shore, opened his diving mask, and said to Zheng Dexing on the shore: "It's a bit troublesome, Old Zheng, the gap below is a bit big, and the boat of this size must be made of high-quality low-carbon steel. Our No. 18 welding rod is probably not good..."

"Of course your welding rods won't work. It's best to use our Japan's Kawasaki Heavy Industries underwater dry welding machine for underwater welding of such large-tonnage ships. Of course, if you can get the 7018S underwater welding rods from the United States, there is no problem. It claims to be able to weld all underwater metal structures, even American nuclear submarines can use this welding rod for underwater wet welding, but it's a pity..."

Before Zhang Yongping finished speaking, Sun Zimei Jiji, who learned about the situation through an interpreter, became energetic immediately, but at the end, Sun Zimei Jiji pursed his lips and shook his head, obviously no longer optimistic The group of people in Zhujiang factory will do the next operation.

Sun Zimei Jiji had been humiliated once before because of the semi-enclosed diving gear.

Even a country like Bosnia, which has been devastated by war, knows about semi-enclosed diving equipment, but he, a ship expert who is known as the only developed country in Asia, doesn't know about it.

If this gets out, what will the industry think of Sun Zimei Jiji in the future?
So when I heard that there were some problems with the underwater welding at the Zhujiang factory, I couldn't wait to jump out to brush up my presence, in order to highlight my aggressiveness, and tell everyone present that although he Sun Zimei Jiji is not I know some semi-enclosed diving equipment, but he has a specialization in the art industry, and he is still the most professional in ship repair.

This is true.

Underwater welding is divided into dry welding and wet welding. As the name suggests, dry welding is to use welding tools to empty the water around the welding surface, and then perform welding operations just like ground welding.

The welding quality of this welding method is high, and the forming is relatively stable, but the cost of the corresponding equipment is also very expensive, the operation is also very complicated, and the cycle is also very long.

Wet welding is much simpler, that is, the welding operation is performed on the working surface directly under water. The cost is low, the operation is simple, and the cycle is short, but there are disadvantages of poor weld quality.

After all, the surrounding water flow has a certain impact on the welding process.

But it is not absolute. For example, the American 7018S underwater welding rod mentioned by Sun Zimei Jiji can perfectly solve this problem. You must know that this welding rod is an underwater wet welding specially developed by the United States for underwater repair of nuclear submarines. technical core.

After all, U.S. nuclear submarines are deployed around the world and cruise around the world. Although they have undergone strict inspection and maintenance before sailing, bumps and bumps will inevitably occur during the deployment process. At this time, it is obviously inappropriate to use complicated dry welding repairs.

Underwater wet welding is faster and more convenient.

It's just that the shell steel used by nuclear submarines is specially treated, let alone welded underwater, even the production plants on land require special welding processes to splice them together.

Therefore, after years of research, the relevant technical departments of the United States have developed the 7018S underwater electrode, which enables it to repair and weld the hull of the nuclear submarine within a range of more than 100 degrees underwater.

Later, this technology expanded from the U.S. Navy to the construction and maintenance of offshore oil drilling platforms and submarine oil and gas pipelines. However, whether it is for military or civilian use, the 7018S underwater electrode is regarded as a core technology by the United States and its exports are restricted.

It is precisely because of this that Sun Zimei Jiji said this, because he knows very well that there is no such high-level underwater special welding rod in China. If there is no such thing, there is no way to repair the ship. If there is no way to repair the ship, why are they still here? What?
Let's obediently leave it to the Japanese. Although there is no 7018S underwater welding rod, Japan's underwater dry welding machine is still world-renowned, and it is no problem to repair a boat.

As a result, Zheng Dexing, who heard these words, ignored Sun Zimei Jiji, the so-called ship technology expert, and calmly ordered other people in the Zhujiang factory beside him: "Prepare the No. 20 welding rod!"

Sun Zimei was stunned for a moment, but he didn't expect that his words, a Japanese expert in ship technology, would be ignored...

(End of this chapter)