A high pressure tube is a tube that can withstand pressure. It is used to transport the liquid. There are many kinds of pipes, such as steel tubes, copper tubes, stainless steel tubes, and so on. High quality carbon structural steel and alloy structural steel high pressure pipe are mainly used for manufacturing steam boilers and pipes with high pressure and above pressure.
High pressure Steel Pipe and stainless steel seamless steel pipe, these boiler tubes work under high temperature and high pressure, and the pipe will be oxidized and corroded under the action of high temperature smoke and steam. Therefore, the steel pipe has high lasting strength, high oxidation resistance and good organization stability.
Steel number is: high quality carbon steel steel steel number 20G, 20MnG, 25MnG; alloy structural steel steel 15MoG, 20MoG, 12CrMoG, 15CrMoG, 12Cr2MoG, 12CrMoVG, 12Cr3MoVSiTiB, etc.; rust resistant steel commonly used 1Cr18Ni9, 1Cr18Ni11Nb high pressure pipe in addition to chemical composition and mechanical energy, to do water pressure test, to make expansion. Oral and flattening tests. The steel pipe is delivered in heat treatment state.
High pressure metal tubes have high lasting strength, high oxidation resistance and corrosion resistance, good tissue stability and sufficient strength, hardness, wear resistance and impact toughness. High Pressure Tubing,High Pressure Hose,High Pressure Rotary Hose,Hydraulic Hose High Pressure He Bei GuangHao Pipe Fittings Co .,LTD (Cangzhou Sailing Steel Pipe Co., Ltd) , https://www.guanghaofitting.com
Since the market reached a high point in March 2008, after one year's time, the total production and sales of domestic automobiles in a single month have recovered to 1 million units in March 2009. After consecutively increasing in the first three months of 2009, the vehicle engine has also recovered its production and sales in one month to a level of one million units, setting a new historical height when the auto market has just warmed up.
Small-displacement engine benefits significantly
According to the statistics of the latest issue of China's auto industry production and sales, from January to March 2009, 55 domestic automobile engine companies that have been included in the statistics range have accumulatively produced 2,246,100 engines, and sold 2.4019 million engines in total, which was the same period in 2008. This compares with a decrease of 1.74% and 7.08% respectively; however, the month-on-month increase of March was 4.28% and 0.06%, respectively, which was an increase of 32.20% and 28.44% respectively compared with February of this year.
As of the end of March 2009, among a total of 55 engine companies, Guangxi Yuchai, Chongqing Chang'an, Liuzhou Wuling Liuji, FAW-Volkswagen, Beijing Hyundai, Chery, FAW Group, Harbin Dongan Automobile Engine, Anhui Quanchai, Harbin Dongan Automobile Power , Kunming Yunnei, Dongfeng Nissan Passenger Vehicle, Shanghai GM Powertrain, Shanghai Volkswagen Automotive and Dongfeng Honda Engine ranked among the top 15 in terms of cumulative production volume in the first quarter.
Compared with the first quarter of a year ago, Guangxi Yuchai still maintained its No. 1 position, but from its production and sales data, it found that compared to its 11.15% cumulative year-on-year growth rate based on the number of units, the cumulative year-on-year in Kilowatts It is a negative growth of 3.36%. This change shows that its product structure has been greatly adjusted with the market, and mid-size car diesel engines are obviously better sold in heavy-duty diesel engines. The same situation also appeared in FAW Group's product data.
As the state supports the impact of small-displacement cars and subsidy policies for cars to the countryside, Chongqing Changan and Liuzhou Wuling Liuji have two micro-vehicle-based gasoline engine manufacturers occupying the top two and three positions of the cumulative engine production; never before The two companies ranked first and second in the top 15 in terms of light diesel power were respectively ranked No. 9 and No. 11; Harbin Dongan Automobile Power was also producing small-displacement gasoline engines. Lord, rankings have risen.
In addition, Beijing Hyundai’s engine sales rose from last year’s 11th overall to 5th this year, which is in line with the production and sales of the entire vehicle. GAC Toyota’s engine and FAW Toyota’s (Tianjin) engine fell out of the top 15. Both Shanghai Volkswagen and Shanghai GM were split into two separate power divisions, each with a decline in rankings.
Light diesel engine overall better than heavy duty diesel engine
In terms of diesel engines, the total output of 70.67 million units and 674,300 units were respectively sold in the first three months, an increase of 2.34% and -4.11% respectively. As the market gradually picks up, diesel companies have a clear intention to make up for their inventory because production is larger than sales.
From the performance of diesel engine companies, of the 26 diesel engine companies included in the statistics for the first three months of 2009, there were seven companies with an average monthly output of 10,000 units, which was the same as last year. The ranking of the top 7 producers in terms of cumulative production is: Guangxi Yuchai, FAW Group, Anhui Quanchai, Kunming Yunnei, Weichai Holdings, Dongfeng Chaochai, and China National Heavy Duty Truck Group. Among them, Anhui Quanchai, who was ranked among the top seven players last year, entered the top three at one stroke; Dongfeng Motor's shares fell to the top 7 (11) due to product structure.
Among the enterprises with large production volume (with an average monthly production of more than 5,000 units) in the first quarter, the strong growth performance is: Anhui Quanchai (cumulative growth of 61.31%), Shandong Laidong (51.59%), Kunming Yunnei (16.63%) and Guangxi Yuchai (11.45%); the unsatisfactory performance was Dongfeng Motor (-51.54%), Weichai Holdings (-30.07%) and Beiqi Foton (-19.68%). Compared with a year ago, the limelights of light diesel engines and heavy-duty diesel engines just shifted over.
The State encourages policies to favor small-displacement gasoline engines
In terms of gasoline engines, the cumulative production and sales volume for the first three months of 2009 were 1,728,300 units and 1,726,600 units, respectively, 3.33% and 8.19% lower than the same period of last year.
Among the 40 gasoline engine companies in statistics, Chongqing Changan, Liuzhou Wuling Liuji, FAW-Volkswagen, Beijing Hyundai, Chery, Harbin Dongan Automobile Engine, Harbin Dongan Automobile Power, Dongfeng Nissan Passenger Vehicle, Shanghai General Dynamics, Shanghai Volkswagen Automobiles, Dongfeng Honda Engine, Geely, Shanghai Volkswagen Powertrain, GAC Toyota Motor and Shanghai General Motors rank the top 15 in terms of production volume.
From the accumulated production in the first quarter, it can be seen that among the enterprises with large production capacity (average monthly output of more than 10,000 units), the momentum is better than the same period of last year: Shanghai Volkswagen Powertrain (82.00%), Chongqing Anhuaihai Power (75.71%), Beijing Hyundai (36.32%), Chongqing Chang'an (24.12%), Geely (12.00%), Harbin Dongan Automobile Power (11.33%) and Dongfeng Nissan Passenger Vehicle (10.93%); Interesting ones are Shanghai General Motors (-44.68%), FAW Toyota (Tianjin) engines (-43.54%), Shanghai Volkswagen (-34.98%), GAC Toyota Motors (-24.25%) and Shanghai General Motors ( -24.20%). Of course, the above changes in production and sales data are related to factors such as the splitting of companies and the adjustment of China Automobile Association report. In spite of this, it can still be seen that companies with better production conditions are basically related to policy benefit factors.
It is worth noting that, from the sales data of passenger vehicles in the first quarter, the cumulative number of cross passenger cars in the sub-models ranks first in cumulative year-on-year growth of 34.78%, while the MPV models (mainly business-oriented) that have been affected greatly become The only negative growth (-15.41%) of the major models. In terms of engine displacement, models with a displacement of less than or equal to 1.0 liters and between 1.0 and 1.6 liters benefit significantly, with an increase of 26.52% and 20.78%, respectively, while the displacement is between 4.0 liters and 3.0 to 4.0 liters. The models were the most affected, falling by 93.68% and 60.49% respectively. These are in line with the effects that the country's various policies and measures must achieve.
The high pressure pipe occupies an important position in the development of the steering pipe of the hydraulic power steering system.
In addition, the microstructure, grain size and decarburization layer of finished steel pipe also have certain requirements. Seamless pipes for geological drilling and oil drilling and control are used for drilling underground wells in order to ascertain the structure of underground strata, underground water, oil, natural gas and mineral resources.
The exploitation of oil and natural gas can not be separated from the drilling, and the geological drilling and controlling of the seamless steel pipe used for oil drilling is the main equipment of the drilling, which mainly includes core outer tube, core tube, casing, drill rod and so on.
Because the drilling pipe has to work deep into the depth of several kilometers, the working conditions are very complex, the drill rod is subjected to tensile, pressure, bending, torsional and unbalanced impact loads, and it is also worn by mud and rock. Therefore, the pipe must have enough strength, hardness, wear resistance and impact toughness, steel pipe. The use of steel "DZ" (Geological Chinese Pinyin head) is represented by a number of steel yield points. The commonly used steel numbers are DZ45 45MnB, 50Mn; DZ50 40Mn2, 40Mn2Si; DZ55 40Mn2Mo, 40MnVB; DZ60 40MnMoB.
The steel pipes are all delivered in heat treatment.
Petroleum cracking pipe: seamless tube for furnace tubes, heat exchanger tubes and pipes used in petroleum refineries. Commonly used high quality carbon steel (10, 20), alloy steel (12CrMo, 15CrMo), heat resistant steel (12Cr2Mo, 15Cr5Mo), stainless steel (1Cr18Ni9, 1Cr18Ni9Ti) manufacturing. In addition to the chemical composition and various mechanical properties, the steel pipe should also ensure water pressure, flattening, flaring and other tests, as well as surface quality and non-destructive testing. The steel pipe is delivered under heat treatment.
Stainless steel pipe: hot rolled stainless steel tubes of various stainless steel, cold rolled stainless steel pipes, widely used in oil, chemical equipment pipes and all kinds of stainless steel structures for various purposes. In addition to ensuring chemical composition and mechanical properties, all steel pipes used to withstand fluid pressure should be qualified for water pressure testing. All kinds of special steel pipe should be guaranteed according to the stipulations.
High pressure rubber tube has non-toxic, environmental, physiological inertia, UV resistance, ozone resistance, high temperature resistance (-80 to 300 degrees), high transparency, strong resilience, compression resistant permanent non deformation, oil resistance, stamping, acid and alkali resistance, abrasion resistance, refractory, voltage resistance, electrical conductivity and so on.
In the first quarter, the momentum of the car engine warms up significantly