China titanium piping solution supplier: www.titaniuminfogroup.com

Development and application of titanium welded pipe in China

Titanium and titanium alloy straight seam welded pipe (hereinafter referred to as “titanium welded pipe“) is welded by rolling titanium and titanium alloy rolled strip or wide plate into tube shape. Titanium alloy grades in the United States are mainly Gr.1, Gr.2 and Gr.12, while those in China are mainly TA1, TA2 and TA10.

de63f8f0981b437c859d62ceb72e76c7 - Development and application of titanium welded pipe in China

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Production process of titanium welded pipe:

Titanium strip uncoiling → shearing butt welding → looper storage → titanium belt cleaning → tube forming → welding → eddy current flaw detection of weld → preset diameter → on-line annealing → fine sizing / straightening → eddy current flaw detection → laser diameter measurement → on-line code spraying → cut to length → ultrasonic flaw detection → precise sizing / flat head → air tightness test → finished product inspection → packaging and warehousing.

Development of titanium welded pipe industry in China in recent years

Due to the constraints of raw materials and processing technology, the production technology of titanium welded pipe has been in the hands of professional manufacturers in Japan, the United States, France, Russia and other countries for many years. Compared with other titanium products, the development of China’s titanium welded pipe started late, and the early development was relatively slow. Although titanium seamless pipe started earlier in China, its application is limited due to its many processing procedures, long production cycle, low efficiency and high cost. However, the production efficiency and yield of titanium welded pipe are high, and the expansion and bending properties of titanium welded pipe are similar to those of seamless pipe. Therefore, the amount of titanium welded pipe in China is increasing year by year, and its application in power plant condenser is increasing day by year 。
In the early stage of the development of titanium welded pipe, although China introduced a complete automatic production line of small diameter titanium welded pipe from abroad, which ended the history that China could not produce titanium welded pipe, at that time, the raw material of titanium welded pipe in China was totally imported, and the strip blank for thin-wall titanium welding pipe could not be provided. At the same time, the sales price of foreign titanium strip coil was high, so the titanium welding in China was restrained In addition, due to the multiple effects of technology introduction and digestion and raw material procurement difficulties, domestic titanium welded pipe has not really possessed the mass production capacity, and the titanium welded pipe market in China at that time did not really form.
In recent ten years, the rapid development of China’s titanium welded pipe industry is mainly due to China’s major breakthrough in the production technology of titanium strip coil, the raw material of titanium welded pipe. The technical performance index and quality stability of domestic cold and hot rolled titanium strip coil can meet the requirements of titanium welded pipe.
In recent years, with the overall progress of titanium industry, the expansion of sponge titanium production capacity and the expansion of titanium processing capacity such as titanium strip coil, the downstream titanium welded pipe industry has also made considerable development. Since 2008, China has successively built a number of titanium welded pipe production lines. The expansion of titanium welded pipe production capacity and the slowdown of titanium industry development speed aggravate the competition among titanium welded pipe enterprises. At present, in addition to Xiangtou Jintian technology group and other enterprises with complete titanium industry chain, other titanium welded pipe enterprises, as well as many enterprises with stainless steel pipe and rare metal pipe as their main business, are also promoting the progress of titanium welded pipe industry. Titanium welded pipe enterprises pay more and more attention to the development of new technology and differentiation.
The application field of titanium welded pipe is expanding continuously. Titanium welded pipe has become the first choice to replace stainless steel pipe, copper nickel alloy pipe and titanium seamless pipe in many industries. After several years of development, domestic titanium welded pipe has broken through a series of key process and technical bottlenecks, and has been widely used in power, air conditioning, seawater desalination, water treatment equipment and other fields. In addition, domestic titanium welded pipe has also realized batch export. It can be seen that the production process and quality level of domestic titanium welded pipe have been greatly improved.

Development of titanium welded pipe industry in China in recent years

Due to the constraints of raw materials and processing technology, the production technology of titanium welded pipe has been in the hands of professional manufacturers in Japan, the United States, France, Russia and other countries for many years. Compared with other titanium products, the development of China’s titanium welded pipe started late, and the early development was relatively slow. Although titanium seamless pipe started earlier in China, its application is limited due to its many processing procedures, long production cycle, low efficiency and high cost. However, the production efficiency and yield of titanium welded pipe are high, and the expansion and bending properties of titanium welded pipe are similar to those of seamless pipe. Therefore, the amount of titanium welded pipe in China is increasing year by year, and its application in power plant condenser is increasing day by year.
In the early stage of the development of titanium welded pipe, although China introduced a complete automatic production line of small diameter titanium welded pipe from abroad, which ended the history that China could not produce titanium welded pipe, at that time, the raw material of titanium welded pipe in China was totally imported, and the strip blank for thin-wall titanium welding pipe could not be provided. At the same time, the sales price of foreign titanium strip coil was high, so the titanium welding in China was restrained In addition, due to the multiple effects of technology introduction and digestion and raw material procurement difficulties, domestic titanium welded pipe has not really possessed the mass production capacity, and the titanium welded pipe market in China at that time did not really form.
In recent ten years, the rapid development of China’s titanium welded pipe industry is mainly due to China’s major breakthrough in the production technology of titanium strip coil, the raw material of titanium welded pipe. The technical performance index and quality stability of domestic cold and hot rolled titanium strip coil can meet the requirements of titanium welded pipe.
In recent years, with the overall progress of titanium industry, the expansion of sponge titanium production capacity and the expansion of titanium processing capacity such as titanium strip coil, the downstream titanium welded pipe industry has also made considerable development. Since 2008, China has successively built a number of titanium welded pipe production lines. The expansion of titanium welded pipe production capacity and the slowdown of titanium industry development speed aggravate the competition among titanium welded pipe enterprises. At present, in addition to Xiangtou Jintian technology group and other enterprises with complete titanium industry chain, other titanium welded pipe enterprises, as well as many enterprises with stainless steel pipe and rare metal pipe as their main business, are also promoting the progress of titanium welded pipe industry. Titanium welded pipe enterprises pay more and more attention to the development of new technology and differentiation.
The application field of titanium welded pipe is expanding continuously. Titanium welded pipe has become the first choice to replace stainless steel pipe, copper nickel alloy pipe and titanium seamless pipe in many industries. After several years of development, domestic titanium welded pipe has broken through a series of key process and technical bottlenecks, and has been widely used in power, air conditioning, seawater desalination, water treatment equipment and other fields. In addition, domestic titanium welded pipe has also realized batch export. It can be seen that the production process and quality level of domestic titanium welded pipe have been greatly improved.

Comprehensive advantages of titanium welded pipe

In China, the production technology of low strength and low alloying titanium seamless pipe is relatively mature. In some pipes that need high pressure resistance and structural stress, thick wall titanium seamless pipe is generally used. However, due to the influence of factors such as low yield and long delivery cycle of titanium seamless pipe, it has become the trend of titanium pipe industry to vigorously develop titanium welded pipe. Compared with titanium seamless pipe, the comprehensive advantages of titanium welded pipe are more and more obvious. In Japan, the United States, Europe and other countries and regions, titanium welded pipe is gradually replacing titanium rolling pipe.

The mechanical properties of titanium welded pipe and titanium seamless pipe are basically the same

Taking titanium and titanium alloy tubes for heat exchanger and condenser as an example, the national standard is GB / T3625-2007, and the American standard is ASTM B338. The chemical composition, mechanical properties and process performance of titanium welded pipe and titanium seamless pipe are not different or even the same. With the development of welding and heat treatment technology of titanium welded pipe, single gun or multi gun TIG / paw self fusion welding is widely used in China’s thin-walled titanium welded pipe. After welding, the on-line heat treatment process is adopted. By optimizing the welding and annealing process, the microstructure of base metal, weld and heat affected zone is basically similar. At the same time, the welding stress is eliminated and the weld microstructure is homogenized. Through comparison, it is found that the weld composition of titanium welded pipe is basically consistent with that of base metal, and the mechanical properties and corrosion resistance of weld are the same as those of base metal.

The appearance and quality of titanium welded pipe is better than that of titanium seamless pipe

Titanium welded pipe is welded by cold rolled strip coil, with uniform wall thickness, good concentricity, good finish, and is not easy to scale in the pipe. In particular, the production of thin-walled titanium tube by seamless rolling process can not meet the technical requirements. It is difficult to achieve wall thickness less than 1 mm for titanium seamless pipe after rolling or drawing process, while titanium welded pipe can achieve wall thickness of 0.5 mm or less, which saves a lot of materials and costs. At the same time, due to the thin wall thickness of titanium welded pipe, higher heat transfer coefficient and better heat transfer effect can be obtained.

Titanium welded pipe has outstanding advantages in cost and environmental protection

The production process of titanium seamless tube is complex. The tube blank of certain specification is rolled or drawn by three high or multi roll rolling mill and drawing machine, and then the seamless tube is produced by reducing diameter and wall. The production efficiency and yield of the process are low. Titanium seamless tube from sponge titanium to tube, through rolling or drawing, material waste is large, the yield is only about 50%, and can not achieve large-scale mass production, production cycle is relatively long.
Titanium welded pipe is produced by automatic continuous production line, using titanium strip with uniform wall thickness through cold bending, welding, on-line heat treatment, sizing and straightening, nondestructive testing and air tightness testing. From sponge titanium to welded pipe, the material utilization rate is usually about 80%. If titanium strip coil is used as raw material, the material utilization rate is more than 95%. With the rapid development of China’s titanium industry and the maturity of welding technology, the production efficiency of titanium welded pipe will be greatly improved, and the quality stability, consistency and production efficiency will be higher. It can be cut into the required length according to customer requirements, with short delivery time, high material utilization rate and lower unit cost than seamless pipe.
Titanium seamless pipe is usually produced by rolling or drawing process. A lot of rolling oil and drawing oil will be used in the production process, and the pollution on the production site is serious. After rolling and drawing of titanium tube, degreasing and pickling of grease and dirt on the inner and outer surface of the tube are needed. The pickling process has a great environmental pollution. In order to ensure the health of operators and protect the environment, it is necessary to increase protective equipment and protective measures, so as to increase capital investment and the production cost of products. Titanium welded pipe is produced in large quantities through automatic production line, with stable quality and high production efficiency. In addition to a certain amount of energy consumption such as water and electricity, the titanium welded pipe almost has no pollution to the environment.

Application of titanium welded pipe

Application in seawater desalination

In the past, the material of condensing tube in seawater desalination equipment was mostly copper alloy tube, but its corrosion resistance was poor, and with the increase of copper price, the cost also increased a lot.
Later, stainless steel welded pipe with good corrosion resistance gradually replaced copper alloy pipe and became the main material for condenser pipe. And the application of titanium welded pipe is also gradually launched, many countries prefer to use titanium welded pipe with high cost but better corrosion resistance.

Application in electric power industry

Both thermal power plants and nuclear power plants need to use a large number of heat exchanger devices, such as condenser, condenser, heat exchanger, etc. Most of these power plants use seawater as the cooling medium, and titanium welded pipes with corrosion resistance and long maintenance period are used as cooling pipes.

Application in petrochemical industry

In some fields of petrochemical industry, such as the cooler used in crude oil refining and p-xylene production, stainless steel welded pipe is not suitable for use, and pitting corrosion is very easy to occur, so titanium welded pipe must be used.
In the chemical industry, many corrosive devices only use titanium welded pipe to ensure the normal operation of the equipment and reduce the maintenance time and frequency.

Sports industry

Stainless steel welded pipe plays a major role in sports equipment, but titanium welded pipe is also widely used in sports goods, such as golf club, bicycle frame and so on.

Application in aerospace industry

In the field of aerospace, titanium welded pipe has incomparable advantages compared with stainless steel welded pipe. It can not only reduce the weight of the aircraft, but also prolong the service life and reduce the maintenance time.
In a word, the practicability of titanium welded pipe is very high, but the price is more expensive. With the progress of production technology and technology, the price of titanium welded pipe will be gradually reduced and accepted by the majority of users.

Conclusion

With the deepening of understanding of titanium welded pipe, the use of titanium welded pipe in petrochemical industry will be recognized by the market, the scope of use will be wider and wider, and the market share will be larger and larger. Although the investment cost of titanium welded pipe is higher than that of common fluid transportation pipeline, its cost is lower than that of titanium seamless pipe. From the analysis of service life and maintenance cycle of titanium welded pipe, the investment cost of titanium welded pipe can be compensated in use. The use of titanium welded pipe in pipeline system can reduce the number of regular maintenance, reduce the shutdown time, improve product quality and improve the pipeline life To reduce production costs. In particular, in recent years, the global titanium industry is not very prosperous, and the competition is very fierce. The price of titanium welded pipe has been at a low level. Enterprises in the petrochemical industry choose titanium welded pipe with lower equipment investment cost.
Although China’s titanium welded pipe industry has made rapid development, the production process and quality level have been greatly improved. Titanium welded pipe has been widely used in power, seawater desalination, water treatment equipment, air conditioning equipment and other industries, the use of titanium welded pipe in petrochemical industry is still being promoted.

Source: China Titanium Welded Pipes Manufacturer: www.titaniuminfogroup.com

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development and application of titanium welded pipe in china - Development and application of titanium welded pipe in China
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Development and application of titanium welded pipe in China
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Titanium and titanium alloy straight seam welded pipe (hereinafter referred to as "titanium welded pipe") is welded by rolling titanium and titanium alloy rolled strip or wide plate into tube shape. Titanium alloy grades in the United States are mainly Gr.1, Gr.2 and Gr.12, while those in China are mainly TA1, TA2 and TA10.
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www.titaniuminfogroup.com
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