News

1. For the placement of stainless steel compression pipe fittings, it is necessary to prevent direct sunlight as much as possible. Security guards can be used not only for shielding protection. 2. When the stainless steel compression pipe fittings are stained with oil stains, be sure to scrub them. Especially at the pipe end and the EPDM sealing ring of the pipe fitting, determine whether there is any residue. If there is any residue, it should be removed immediately to prevent it from affecting its sealing. 3. The stainless steel compression pipe fittings are thin-walled stainless steel pipe fittings, which should be handled with care, and should not be thrown, let alone trampled on the pipe fittings during construction. 4. If the pipe fittings cannot be successfully placed in the pipeline, check whether the burrs of the lower pipe fittings have been thoroughly cleaned, especially the burrs on the inner and outer walls, because the burrs will harm the gap between the pipe fittings and the pipeline. 5. After the stainless steel compression pipe fittings are placed, they will not be temporarily clamped. The thread should be rotated first and then clamped to prevent the clamped connector from falling off due to the rotating thread. 6. If there is slack at the pressing place, you can press it again at the original pressing place (pay attention to the hexagonal orientation). 7. When the installation pipeline is skewed, the calibration cannot be taken at the position of the pipe fittings. Once the calibration is performed at the clamping point, it may cause relaxation, which is also an important factor causing poor sealing performance. It should be carried out at the straight pipe. 8. When the pipeline system is suitable for other media other than water (such as oil, chemical preparation, etc.), please communicate with the merchant to prevent the sealing ring of the pipe fittings from being corroded by the medium and swollen and damaged. 9. If the pipeline is installed around the bay or in a site with high salinity, anti-corrosion measures should be considered.

Stainless steel pipe fittings are one of the pipe fittings. They are made of stainless steel, so they are called stainless steel pipe fittings. Stainless steel pipe fittings include: stainless steel elbow, stainless steel tee, stainless steel cross, stainless steel head, stainless steel flange, etc. The shrinking of the reducer is to heat one end of the stainless steel pipe with a large diameter and a large diameter to a red-hot state, and use a hammer to smash it to reduce the diameter to become a large pipe and a small pipe. ". Sometimes the caliber difference between the two ends of the stainless steel head is too large, so one end of the large-caliber tube is first cut off a few arc-shaped triangular pieces, and then heated to a red-hot state, and hit with a hammer to make the cut notch close to it. Form the seam together, round the small port formed, and then weld the seam. According to the size of the reducing diameter of the reducer, it is divided into one press forming or multiple press forming. In addition to the use of steel pipes as raw materials to produce large and small heads in stamping forming, the large and small heads of some specifications can also be produced by stamping forming process with steel plates. The shape of the die used for drawing is designed with reference to the size of the inner surface of the large and small heads, and the blanked steel plate is punched and stretched by the die. In addition to using steel pipes as raw materials to produce large and small heads, the large and small heads of some specifications can also be produced by stamping and forming process with steel plates. The big and small head (reducer) is a kind of pipe fitting for the pipe diameter. The forming process of stainless steel head is usually reduced diameter pressing, expanding diameter pressing or diameter reducing and expanding diameter pressing, and stamping can also be used for reducers of certain specifications. The diameter reduction forming process of the small and large heads is to put the tube blank with the same diameter as the big end of the big and small heads into the forming die, and by pressing along the axial direction of the tube blank, the metal moves along the cavity and shrinks to form. .

We know that the stainless steel flanged ball valve is a valve with excellent performance, which basically does not rust during daily use. However, this is not absolute. If you don't pay attention, there will still be rust during its use. How to prevent this? Stainless steel flanged ball valves are very easy to contact with other metal iron products during the manufacturing process. If the finished product is mixed with other metals, it may rust in the process of future use. In order to keep it from rusting all the time, the easiest way is to follow the process below: 1. After the rough product is finished, it must be cleaned after pickling. If there are sand holes or perforations, it should be gas shielded by argon arc welding. Then grind again, and then carry out solid melting treatment; 2. The finished product should be rinsed with water with anti-rust powder added after the processing and pressure test is completed. 3. Use wooden boxes as much as possible during transportation and do not touch metal products. 4. After the pipeline is installed, it should be regularly maintained and maintained. For example, the valve stem should be lubricated frequently, and the valve should be opened and closed several times properly, so that the valve stem and the sealing surface are not easy to assimilate. Doing the above points can protect the stainless steel flanged ball valve from rusting.

1. The placement of stainless steel compression fittings should avoid sunlight exposure as much as possible, and security personnel can be used not only to block safety protection. 2. When the stainless steel compression pipe fittings are stuck with oil stains, they must be cleaned. Especially in the position of the EPDM sealing ring of the pipe end and pipe fittings, it is necessary to determine whether there is any sediment. 3. The stainless steel compression pipe fittings are thin-walled stainless steel pipe fittings, which should be handled with care, and should not be thrown, let alone trampled on the pipe fittings during construction. 4. If the pipe fittings cannot be successfully placed in the pipeline, check whether the burrs of the lower pipe fittings have been thoroughly cleaned, especially the burrs on the inner and outer walls, because the burrs will harm the gap between the pipe fittings and the pipeline. 5. After the stainless steel compression pipe fittings are placed, they will not be temporarily clamped. The external thread should be rotated first and then clamped, so as to avoid the pressed joint from falling off due to the rotation of the external thread. 6. If there is slack in the clamping place of stainless steel pipe fittings, it can be clamped again at the original clamping place (pay attention to the hexagonal orientation). 7. When the installation pipeline is inclined, it is not allowed to use the correction at the pipe fittings. Once the correction is made at the clamping pressure, it may cause relaxation, which is also the key factor leading to poor airtightness. It should be carried out at the straight pipe. 8. When the pipeline system is suitable for other media other than water (such as oil, chemicals, etc.), please communicate with the merchant to prevent the sealing ring of the pipe fittings from being corroded by the medium and swollen and damaged. 9. If the pipeline is installed near the harbour or in a place with high salinity, corrosion-resistant precautions should be taken into account.

1. When storing or placing unused stainless steel pipe fittings, there should be a special storage area, and the pipe fittings should be placed neatly so that the whole is evenly stressed, avoid mixing with other building materials such as cement, and have a covering to avoid sunlight. Or contact with other oils, sand and gravel. 2. After measuring, drawing lines, and comparing according to the correct operating specifications, if the pressure is not in place at one time, the second pressure can be performed, but remember to press and test the water after the installation is completed to ensure that there is no water leakage. 3. The pipe fittings in the water supply field are thin-walled, and the thinnest stainless steel pipe and pipe fittings are 0.8mm thick. Therefore, when using or handling stainless steel pipe fittings, remember to handle them with care, and do not throw or smash them, which will easily damage the surface of the pipe fittings. The chromium-rich oxide film causes the phenomenon of rusting. 4. If it is difficult to insert the pipe when connecting the stainless steel pipe and the pipe fitting, you can first consider whether the burr of the pipe is not removed when cutting, so as to prevent the burr from damaging the sealing rubber ring in the pipe fitting. 5. If stainless steel pipes and fittings are accidentally contaminated with oil or decoration chemicals at the construction site, remember to clean them in time to prevent damage to the oxide film on the surface of the pipes.

The 304 stainless steel water supply pipe has stronger safety factor performance than other tap water pipes, and its wear resistance is more in line with the requirements. At the current stage of unevenness, the price of stainless steel water pipes on the market is naturally high and low due to different raw materials. As a general consumer, how do you distinguish between 304 and 201 stainless steel pipes? Below I will use three methods to teach you the difference between 304 and 201 stainless steel pipes: 1. Look at the anti-counterfeiting mark on the stainless steel tube. Stainless steel pipes are generally marked with anti-counterfeiting marks, specifically on the body of the pipe fittings on one of the sides. Generally, there will be an anti-counterfeiting mark in the middle of 60~100 cm. The anti-counterfeiting marks generally contain such content: Raw materials of stainless steel pipes, manufacturers or famous brands of stainless steel pipes. 2, 304 and 201 stainless steel pipes, the surface is generally matt. According to the way people see and touch: 304 stainless steel tube has good smoothness and shine, and the hand touch is very smooth; 201 stainless steel plate is dark in color and has no smoothness, and it will feel uneven when touched. . In addition, when the hands are wet with water, touch two kinds of metal materials, and the water-stained fingerprints left after touching, the 304 stainless steel plate is relatively easy to wipe off, and the 201 is not easy to wipe off. 3. Use the polishing machine to install the polishing sheet and slowly polish the two kinds of plates or pipes. When polishing, the flame of the 201 raw material is longer, thicker and more, while the flame of the 304 raw material is shorter, thinner and less. Remember to use light force when grinding and polishing, and keep the amplitude and direction as consistent as possible.

1. In terms of structure and mechanism, the hard seal valve is a seal between metal and metal. The sealing surface and valve seat are all metal, and the machining accuracy and process are difficult. Generally, it is used in high pressure, usually above 2.5MPa. Soft seal is the seal between metal and non-metal, such as nylon \ tetrafluoroethylene, the manufacturing standard is the same. 2. The soft and hard seal on the sealing material refers to the sealing material of the valve seat. The hard seal is precision machined with the valve seat material to ensure the matching accuracy with the valve core (ball), generally stainless steel and copper. Soft seal means that the sealing material embedded on the valve seat is a non-metallic material. Because the soft sealing material has a certain elasticity, the machining accuracy requirements are lower than that of the hard sealing. 3. In the manufacturing process, due to the complex working environment of many chemical and mechanical industries, many of which are high temperature and high pressure, the friction resistance of the medium is large, and the corrosion is strong. Now the technology has advanced, the use of various materials is better, and the processing And other aspects can keep up, so that the hard seal valve has been widely promoted. In fact, the principle of the hard seal valve is the same as that of the soft seal, but because it is a seal between metals, the hardness relationship between the metals, as well as the working conditions and the medium used, must be considered. Hardening treatment is generally required, and continuous grinding between the sealing surfaces is required to achieve sealing. Hard sealing valves have a long production cycle and complex processing, which is not easy. 4. In terms of use conditions, soft-sealed valves can generally achieve high sealing, while hard-sealed valves can be high or low according to requirements; soft-sealing needs to be fireproof, because at high temperatures, the material of soft-sealing will leak, while hard-sealed valves will leak. There is no such problem; hard seals can generally do very high pressures, but soft seals cannot; soft seals cannot be used in some occasions (such as some corrosive media) due to the problem of the flowing medium; Soft seals are expensive. As for manufacturing, there is little difference between the two, mainly the difference between the valve seat, the soft seal is non-metallic, and the hard seal is metal. 5. In the selection of equipment, the selection of soft and hard sealing valves is mainly based on the process medium, temperature and pressure. Generally, the medium contains solid particles or has wear or the temperature is higher than 200 degrees. It is best to use hard sealing. If the torque is large, the opening torque of the valve should also be considered. When the torque is large, a hard-sealed valve should be selected. How to choose soft sealing and hard sealing area of valve? 1. Soft seal In addition to the corrosion-resistant lining valve, the general soft seal valve refers to a valve in which either the valve core or the valve seat adopts a non-metallic material (mainly polytetrafluoroethylene, and rubber, etc.) in the form of sealing. The soft sealing valve has the best sealing effect, but more or less unclean debris (such as welding slag, iron filings, etc.) may be left in the pipeline installation and system cleaning. The soft sealing valve seat or valve core is scratched, which increases the leakage and causes poor sealing reliability. Therefore, the selection of the soft sealing structure must consider the cleaning of the medium and the strict flushing of the pipeline before putting into operation. 2. Hard sealing and hard sealing and then surfacing wear-resistant alloys are the best choices for shut-off valves. In this way, the service life and reliability are also considered while considering the sealing performance. Although the factory index is only 10-6 to 10-8, which cannot achieve the effect of zero leakage of the soft seal, it is enough to meet the requirements of strict shut-off, and it Durable and more cost-effective from an economical point of view. Content from the Internet

Friends who are familiar with stainless steel valves know that the material of 316L stainless steel valve is quite resistant to corrosion, and the corrosion resistance is greater than that of 304 material. The valve of this material has good resistance to harsh, corrosive, acidic and alkaline places. Therefore, the valves used in these occasions generally choose to use 316L stainless steel valves. But some users don't quite understand: Where are 316L stainless steel valves mainly used? , to this end, to explain to you in detail. Due to the good corrosion resistance of 316L stainless steel valves, 316L stainless steel valves are preferred for water supply pipelines and valve equipment used in subsea projects in some coastal areas, followed by chemical plants, dye houses, and paper mills. It is suitable for use in the sewage discharge of the site or the conveying/discharging of other media. At the same time, the use of 316L stainless steel valves can support a service life of more than 70 years. Compared with cast iron valves, the physical properties of 316L stainless steel valves, such as environmental protection, safety, firmness, compression resistance, shock resistance, and durability, promote its long-term use and meet the requirements of Modern environmental protection, energy saving and other usage standards.

1. In daily life, as little chemical substances as raw soy sauce and oil traces are poured into the stainless steel water pipe, because these two raw materials are prone to chemical changes, which will cause the stainless steel water pipe to corrode. 2. Before installing the stainless steel pipe, you can first apply a layer of vegetable oil on the surface of the pipe, and then use a small fire to dry it slightly. The purpose is to better increase the service life of the stainless steel pipe, and it is also very easy to clean. 3. If there is rust on the outer surface of the stainless steel pipe, immediately brush the rust with special stainless steel plate wax for anti-rust treatment. After the wax has been on for a period of time, polishing and cleaning can be carried out. After cleaning the wax, the surface on the outside of the tube was changed again. 4. In daily life, try not to hit the stainless steel pipe with sharp mouths. 5. When transporting stainless steel pipes, the contents of the pipes should be fixed to prevent the pipes from colliding with the contents of the pipes, or encountering other sharp objects, which are very easy to cause pits on the surface of the pipes, which are not beautiful. 6. Once the outer surface of the stainless steel pipe is scratched, you can use a dry cotton towel dipped in a small amount of stainless steel care agent, then scrub the scratches, and gently scrub with a sanding wheel until the scratches subside. 7. One way to repair the surface gloss of stainless steel pipe is to coat the surface of the pipe with a soft fabric, so that the surface of the pipe will become brighter and brighter immediately. However, this method cannot be used frequently. If it is used frequently, the original gloss of the tube is likely to be difficult to repair.

Anyone who knows more about stainless steel pipe fittings knows that stainless steel pipe fittings are prone to form white spots on the surface after being oxidized. After this happens, corresponding treatment must be taken. So what are the treatment methods? Methods as below: 1. Surface grinding method. Grinding can fill the pores of the stainless steel pipe with the ground aluminum powder. 2. High voltage and high current density impact method. In the early stage of anodizing, high voltage and high current impact are adopted, so that the large and small stainless steel pipe fittings originally cut by impurities are connected into pieces by high current impact. 3. Surface shot peening. Since the selection of shot peening power will be greatly improved, the effect of such stainless steel pipe fittings is good after anodizing and dyeing. The above is the whole content of the method of treating the oxidized white spot of stainless steel pipe fittings.

China is a big country in stainless steel production. With the rapid development of the domestic stainless steel industry, the number of stainless steel products has also increased year by year. However, in recent years, Thailand, Malaysia, India, Brazil and other countries have increased sanctions on the export trade of China's stainless steel products, which will affect my country's stainless steel products. Export of stainless steel products. The "2015-2020 China Stainless Steel Industry Development Prospect Forecast and Transformation and Upgrade Analysis Report" provided by the Prospective Industry Research Institute pointed out that in 2014, my country's stainless steel production was 21.692 million tons, a year-on-year increase of 14.27%, accounting for about half of the global output. In 2018, China exported 3.85 million tons of stainless steel, a year-on-year increase of 45.12%. However, with foreign trade sanctions on stainless steel exports, the export business of domestic stainless steel enterprises will face pressure. At the same time, the overcapacity, low quality and environmental pollution problems in the development of domestic stainless steel enterprises also restrict the development of the stainless steel industry. Taking the stainless steel anti-dumping investigation opened abroad as an opportunity, the domestic stainless steel industry will have the following development trends in the future. First, industry concentration will increase. Export restrictions will further increase the current situation of oversupply in the stainless steel market. In the future, the trend of industry mergers and reorganizations and elimination of backward production capacity will strengthen. It is expected that stainless steel enterprises with an annual output of more than 150,000 tons are more likely to be merged and reorganized. Second, the industry will transform from a quantitative growth type to a structural adjustment type. It will be the general trend to continuously adjust the product structure and develop high-tech and high-value-added products; in addition, in order to avoid elimination under the heavy pressure of environmental protection, stainless steel enterprises will also increase investment in environmental protection equipment. Finally, in order to avoid the export risks brought by trade protectionism, stainless steel enterprises will gradually build production bases overseas, which will also help enterprises understand local market demand and improve their competitiveness.

Stainless Steel Sanitary Valve There are stainless steel sanitary butterfly valve, three-piece butterfly valve, quick-installed butterfly valve, round screw butterfly valve, pneumatic butterfly valve stainless steel sanitary diaphragm valve, sanitary pneumatic diaphragm valve, stainless steel sanitary U-tube diaphragm valve, stainless steel sanitary ball valve, dairy ball valve, Sanitary ball valve 3P, sanitary ball valve 2P, no dead angle, with retaining ball valve, sanitary clamp ball valve. Stainless steel sanitary check valve, welded check valve, sanitary three-way plug valve, sanitary manual globe valve, T-shaped globe valve, sampling valve, sanitary regulating valve and other sanitary valves. Sanitary valves refer to the valve fittings used in the pharmaceutical, food and other industries that require high hygiene levels. Generally, what is purchased is the configuration of pharmaceutical factories or food factories for maintenance and related equipment, and the purchasers are basically pharmaceutical and food equipment system integrators and wholesalers. Product technical parameters introduction: 1. Raw materials: 304 material and 316L material are two common materials, and the part in contact with the medium is 304 or 316L 2. Seals: strong acid, alkali and high temperature resistance, small permanent compression deformation 3. Connection: Welding, quick-loading, threaded 4. Quality: The product is processed with high-grade polishing equipment inside and outside to meet the surface precision requirements 5. Working pressure: 1.0Mpa 6. Working temperature: -10℃+150℃ 7. Sealing material: specimen EPDM, and silica gel and fluorine rubber can be selected 8. Applicable medium: liquid, gas, oil, various highly corrosive chemical medium

Stainless steel pipe fittings are one of the pipe fittings. They are made of stainless steel, so they are called stainless steel pipe fittings. Stainless steel pipe fittings include: stainless steel elbow, stainless steel tee, stainless steel cross, stainless steel head, stainless steel flange, etc. The shrinking of the reducer is to heat one end of the stainless steel pipe with a large diameter and a large diameter to a red-hot state, and smash it with a hammer to reduce the diameter and become a pipe fitting with a big head and a small head, commonly known as "big head", or "reducing diameter". ". Sometimes the diameter difference between the two ends of the stainless steel head is too large, so one end of the large-diameter tube is cut off a few arc-shaped triangular pieces, and then heated to a red-hot state, and then hit with a hammer to make the cut gap close to the surface. Form the seam together, round the small port formed, and then weld the seam. According to the size of the reducing diameter of the reducer, it is divided into one press forming or multiple press forming. In addition to the use of steel pipes as raw materials to produce large and small heads in stamping forming, the large and small heads of some specifications can also be produced by stamping forming process with steel plates. The shape of the die used for drawing is designed with reference to the size of the inner surface of the large and small heads, and the blanked steel plate is punched and stretched by the die. In addition to using steel pipes as raw materials to produce large and small heads, the large and small heads of some specifications can also be produced by stamping and forming process with steel plates. The big and small head (reducer) is a kind of pipe fitting for the pipe diameter. The forming process of stainless steel head is usually reduced diameter pressing, expanding diameter pressing or diameter reducing and expanding diameter pressing, and stamping can also be used for reducers of certain specifications. The diameter reduction forming process of the large and small heads is to put the tube blank with the same diameter as the big end of the big and small heads into the forming die, and by pressing along the axial direction of the tube blank, the metal moves along the die cavity and shrinks to form. .

There are three main factors that affect stainless steel corrosion: 1. The content of alloying elements. Generally speaking, the content of chromium is 10.5%, and the steel is not easy to rust. The higher the content of chromium and nickel, the better the corrosion resistance. For example, the content of nickel in 304 material is 8-10%, and the content of chromium is 18-20%. Such stainless steel will not rust under normal circumstances. 2. The smelting process of the manufacturer will also affect the corrosion resistance of stainless steel. A large stainless steel plant with good smelting technology, advanced equipment and advanced technology can ensure the control of alloying elements, the removal of impurities, and the control of the cooling temperature of the billet, so the product quality is stable and reliable, the internal quality is good, and it is not easy to rust. On the contrary, some small steel mills have backward equipment and backward technology. During the smelting process, impurities cannot be removed, and the products produced will inevitably rust. 3. The external environment, the climate is dry and ventilated, and the environment is not easy to rust. The air humidity is high, continuous rainy weather, or environmental areas with high pH in the air are prone to rust. 304 stainless steel, if the surrounding environment is too bad, it will rust.

The floating ball valve is a ball without a supporting shaft. The ball is held in a "floating" state by two valve seats. It is mainly used for cutting, distributing and changing the flow direction of the medium on the pipeline. The floating ball valve mainly has the structural characteristics of seat sealing design, reliable reverse sealing valve sealing rod, fire-proof electrostatic function, automatic pressure relief and locking device. Floating ball valve is suitable for: chemical, petroleum, natural gas, metallurgy, and other industries, as well as hydrogen sulfide-containing media, long-distance natural gas pipelines with many impurities and serious corrosion. The main structural features of the floating ball valve are: 1. The valve is provided with open and closed position indication; 2. Locking device; 3. Stem anti-flying structure; 4. Anti-static device; 5. Fireproof structure; 6. Unique valve seat sealing structure; 7. The middle flange (the connection between the valve body and the left body) has no leakage structure. According to different application requirements, the floating ball valve is divided into: ordinary carbon steel series (WCB&A105); stainless steel series (304, 316); low temperature steel series (LCB, LCC); anti-sulfur series, etc. Floating ball valves are suitable for general industrial use. Working principle The float must always float on the water, and when the water level rises, the float also rises. When the float rises, the connecting rod also rises. The connecting rod is connected with the valve at the other end. When it rises to a certain position, the connecting rod supports the rubber piston pad to close the water source. When the water level drops, the float also drops, and the connecting rod drives the piston pad to open. The float valve adjusts the liquid supply by controlling the liquid level. The flooded evaporator requires the liquid level to maintain a certain height, and a floating ball expansion valve is generally suitable. The working principle of the floating ball valve is to control the opening or closing of a valve by relying on the lowering and raising of the floating ball in the floating ball chamber by the action of the liquid level. The float chamber is placed on one side of the flooded evaporator, and the upper and lower balance pipes are connected to the evaporator, so the liquid level of the two is the same. When the liquid level in the evaporator drops, the liquid level in the floating ball chamber also drops, so the floating ball drops, and the opening of the valve is increased by lever action to increase the liquid supply. vice versa. Function and price comparison The plastic float valve has the function of automatically opening and closing the pipeline to control the water level.

Reporter Chen Jialing reports from Beijing In the early morning of March 11, Beijing time, the London Metal Exchange (LME) once again issued a situation statement on the nickel futures incident. In addition to announcing that the trading of London nickel futures would not resume on Friday, it also gave a statement on the suspension and rollback of related transactions in the middle of the week. for further explanation. It is worth noting that in this announcement, the London Metal Exchange bluntly stated: "The sharp rise in prices on Tuesday has created systemic risks to the market." This is the seventh related announcement issued by the LME since the "epic short squeeze" of London Nickel on March 7. Previously, the exchange had announced the suspension of nickel futures contract trading, the cancellation of the March 8 trading results, and plans to set up and down rates. In addition, the reporter of "China Business News" also learned that, affected by the abnormal market situation of London nickel, some domestic banks are conducting self-inspection on all derivatives business recently. Volatility on Tuesday poses systemic risk In the above announcement, the London Metal Exchange stated that the criteria for resuming nickel trading in London had been clearly given in previous announcements: ensuring procedures to safely restart trading, and exploring the possibility of netting long and short positions before restarting. sex. However, these conditions have not been met so far, so the nickel futures market will not restart on March 11 (Friday). Regarding the specific progress, the exchange stated that it is planning to set up price ranges for all contracts that require physical delivery, such as nickel, and will issue a further announcement in the near future. In terms of net settlement of long and short positions, the initial market reaction was not positive. , especially for short positions, and there is also considerable difference between long and short sides on the appropriate settlement price. In addition, the London Metal Exchange also provided further clarification on the suspension and rollback of trading on Tuesday. It is understood that the exchange has been concerned about the impact of the Russian-Ukrainian conflict, especially the nickel market in an environment of low inventories and high price volatility. "The price of nickel futures has risen sharply this week, but the exchange believes that trading activity is still in an orderly state until the close of Monday night." The London Metal Exchange said, "But from the early hours of Tuesday morning, the price of nickel futures began to rise. There has been a sharp rise in a short period of time, which clearly shows that the pricing in this part of the time does not reflect the actual physical market. When the market is out of order, the exchange decided to suspend trading after consulting the clearing company, and canceled it based on the consideration of maintaining market stability and integrity All transactions after 0:00 on the 8th, and the market returned to the state before it got out of control, that is, the closing price of the previous trading day." The exchange further emphasized that the reason for this decision is that the sharp price increase on Tuesday has created a systemic risk to the market. Taking margin as an example, if the exchange does not take action, it is likely to exceed the level that the LME market has experienced. . Exchanges and clearing houses are deeply concerned about the ability of some market participants to meet margin requirements, potentially triggering a significant risk of a series of defaults, reducing the ability of market participants to continue to enter the market and manage risk. The analysis of the interviewed futures industry analysts pointed out that due to the sharp rise in futures prices, the trading liquidity of both long and short participants in the London nickel trading market has shrunk sharply, and even brought huge trading risks to futures market makers, and brokers may also face additional credit losses. The reporter noticed that from the current measures of the London Stock Exchange, including the suspension of nickel futures trading, the cancellation of the trading results on March 8, and the net settlement of long and short positions, the main purpose is to reduce the risk of short-side default and long-side transactions as much as possible first. cost, and guide this market to gradually restore transaction liquidity. Banks Investigate Risks in Derivatives Business In this market risk of the abnormally soaring nickel price, in addition to traders such as Tsingshan Holding Group Co., Ltd. (hereinafter referred to as "Tsingshan Group"), as brokers, some overseas subsidiaries of banks are also involved. Some bank executives said that banks will not directly engage in commodity futures business, but at most do structured products linked to commodity-related indices. Nickel is too small to be directly involved. A person from the financial market department of a bank revealed: "I have indeed heard that some institutions are self-inspecting all derivatives business." The person also said that most domestic banks should not be affected by the recent nickel incident, and it may be involved overseas subsidiaries of some banks. According to media reports, CCB International (Holdings) Limited (hereinafter referred to as "CCB International"), a wholly-owned subsidiary of China Construction Bank (5.960, -0.09, -1.49%) in Hong Kong, has a trading seat in the London Metal Exchange and is On-site members are one of the brokers of Tsingshan Group this time. Our reporter learned that the business process for companies to participate in London nickel futures and other transactions is usually: trading corporate customers first open an account with an institution (such as CCB International, etc.), and then place an order to the institution when they want to conduct futures trading, and the institution will then go to the transaction. Place an order on site. When a margin call is required, the exchange will first chase the traders on the floor (i.e. CCB International), and then the latter will chase corporate clients. The non-ferrous metal industry research report of Huachuang Securities on March 9 pointed out: "According to the closing price of LME nickel at US$50,000/ton on March 7, the margin is US$6 billion, and it is highly likely that CCB will still advance, and then a company in Zhejiang will raise funds. Repay it to CCB. The debt can be repaid with the annual profit of a company in Zhejiang of about 20 billion yuan." It is worth noting that on March 8, when the London nickel futures market rose sharply, Tian Guoli, chairman of China Construction Bank, called on Weng Zuliang, chairman of China Minmetals Group, to reach a consensus on the future in-depth strategic cooperation between the two parties. Ji Zhihong, Vice President of China Construction Bank, Liu Fanggen, General Manager of the Financial Market Department, Guo Wenqing, General Manager of China Minmetals Group, Liu Caiming, Jiao Jian and Zhu Kebing, Deputy General Managers attended the meeting. "Minmetals Group is a state-owned enterprise founded in non-ferrous metal trade, indicating that China Construction Bank has begun to seek professional company support and carry out self-help. On March 9, Tsingshan Group announced that it would replace domestic metal nickel plates with its high matte nickel plates, and had already deployed spot products through various channels for delivery. In addition, the above-mentioned research report also pointed out that the Hong Kong Stock Exchange, as the major shareholder of LME, is helpful to solve the problem, but the LME shot is more to resolve market risks, without intervention or direct liquidation. It was also a blank check. In addition to financial institutions, the impact of the nickel incident has also radiated to the upstream and downstream of the domestic industrial chain. The person in charge of the futures department of a domestic non-ferrous metal industry enterprise told this reporter: "The price has risen too fast. If calculated according to the price before the suspension of trading on March 8, each imported ton of raw materials will lose 300,000 to 400,000 yuan. Companies in the upstream and downstream of the industrial chain are all on the sidelines. For small and medium-sized processing enterprises, it may have a great impact, because they have no means to stabilize prices.

When it comes to stainless steel, I believe everyone knows it, because stainless steel is widely used in our lives. But when it comes to stainless steel surface processing, many people may not know the process. Today we will talk about the surface processing of stainless steel. 1. Mirror surface treatment process Stainless steel mirror surface treatment process is to polish the surface of stainless steel to make the surface of stainless steel have a mirror effect. In our stainless steel surface machining mirror finish, there are different grades: 6K, 8K, superfinished 10K, which can be processed according to different requirements. 2. Sandblasting process The sandblasting process is relatively common in our stainless steel surface processing. It is mainly the processing technology of rapidly spraying the blasting material onto the stainless steel surface through the power of air compression, so that the sandblasting effect we want can be processed. 3. Wire drawing process Stainless steel wire drawing board is a very common material in the decoration industry. This process can be divided into: stainless steel fingerprint wire, stainless steel random pattern wire, spiral pattern and so on. This kind of processing effect is very thick and popular, and it gives people the characteristics of good hand feeling, delicate luster and wear-resistant surface. Stainless steel processing equipment is classified into shearing equipment and surface treatment equipment, and shearing equipment is further divided into flattening equipment and slitting equipment. In addition, according to the thickness of stainless steel, there are cold and hot rolling processing equipment. Thermal cutting equipment mainly includes plasma cutting, laser cutting, water cutting, etc.

First of all, before installation, the threaded connection surfaces of all pipes of the Y-strainer should be carefully cleaned, and the appropriate amount of pipe sealant or Teflon tape (polytetrafluoroethylene) should be used. End threads are left untreated to avoid allowing sealant or Teflon tape to enter the piping system. Secondly, the Y-type filter can be installed horizontally or vertically downward. Just pay attention to the material of the gasket of the strainer when installing. If it is a non-metallic material, it is easy to be damaged due to excessive temperature. Again, pay attention to the direction of the screens of different pipes. For example, the screen direction of the gas pipe should be horizontal, and the screen of the liquid pipe should be installed downward. In addition, there are many types of Y-strainers, such as light filters, air filters, and liquid filters. Therefore, during installation, the installation method should also be determined according to the actual situation of different types of Y-strainers. a: for gas b: for liquid c: flow down

If the main origin is Foshan, Wenzhou, Hangzhou, Chengdu and other Guangdong provinces, the production quality and price are generally higher than other regions. Wenzhou mainly sells more at low prices and is known as the city of stainless steel valves. And the connection methods are also different. It depends on the needs of each company and customer. List the more famous stainless steel water pipe manufacturers in various regions as below Guangdong Province: Yaolong Pipe Industry, Guan Yisheng, Meiya, Minle, Artron, etc. Zhejiang: Zhengkang, Flante, Wenzhou luwei valves and fittings Co.Ltd Sichuan: Common

1. In daily life, as little chemical substances as raw soy sauce and oil traces are poured into the stainless steel water pipe, because these two raw materials are prone to chemical changes, which will cause the stainless steel water pipe to corrode. 2. Before installing the stainless steel pipe, you can first apply a layer of vegetable oil on the surface of the pipe, and then use a small fire to dry it slightly. The purpose is to better increase the service life of the stainless steel pipe, and it is also very easy to clean. 3. If there is rust on the outer surface of the stainless steel pipe, immediately brush the rust with special stainless steel plate wax for anti-rust treatment. After the wax has been on for a period of time, polishing and cleaning can be carried out. After cleaning the wax, the surface on the outside of the tube was changed again. 4. In daily life, try not to hit the stainless steel pipe with sharp mouths. 5. When transporting stainless steel pipes, the contents of the pipes should be fixed to prevent the pipes from colliding with the contents of the pipes, or encountering other sharp objects, which are very easy to cause pits on the surface of the pipes, which are not beautiful. 6. Once the outer surface of the stainless steel pipe is scratched, you can use a dry cotton towel dipped in a small amount of stainless steel care agent, then scrub the scratches, and gently scrub with a sanding wheel until the scratches subside. 7. One way to repair the surface gloss of stainless steel pipe is to coat the surface of the pipe with a soft fabric, so that the surface of the pipe will become brighter and brighter immediately. However, this method cannot be used frequently. If it is used frequently, the original gloss of the tube is likely to be difficult to repair.