Remove the flame. If the filler metal does not melt, continue to heat the joint and try again. The melted filler metal is sucked into the casing port according to the capillary effect until a complete filler metal ring appears on the casing port. Remove the flame Pay special attention not to let the flame directly contact the filler metal. It should be the heat at the joint that melts the filler metal. In order to clean the copper pipe,Kratie6061 aluminum bar, the welding flux must have a degree of corrosivity and shall be cleaned after brazing. The so-called & quot; self-cleaning& quot; fluxes are generally not recommended because of their corrosivity.Some steel mills in Liaoning are interested in purchasing pig iron, but the local resources are tight, and the iron mills quotations are on the high side, resulting in a stalemate between supply and demand. The demand for cast iron and ductile iron in Jiangsu, Shandong, Shanxi, Hebei, Henan and other regions is sluggish, and the inventory pressure of iron mills is increasing. As the price of raw materials decreases, the quotation of iron mills continues to decline. At present, the demand and cost support are weak, and there is no positive boost. The short-term pig iron market is weak and difficult to change.Kratie,Hot water accelerates the corrosion of copper pipes.Later, British researchers found that copper has a strong bactericidal effect. It is believed that in the near future, copper will make great contributions to improving human health. Copper plate T is named after its purple color. It is not necessarily pure copper, sometimes it also involves a few deoxidizing elements or other elements to improve raw materials and s, so it is also included in copper alloys. The processed materials of Chinese cor plate can be divided into four categories according to the composition: ordinary copper plate (T, T, T, T, oxygen free copper plate (TU, TU and high-purity, vacuum oxygen free copper), deoxidized copper plate (TUP, TUMn), and special copper plate (arsenic copper, tellurium copper, silver copper) with a few alloy elements added. The conductivity and thermal conductivity of copper plate are second only to silver, and are widely used to manufacture conductive and thermal conductive devices. The red copper belt has outstanding corrosion resistance in the atmosphere, sea water, some non oxidizing acids, alkalis, salt solutions and a variety of organic acids (aic acid, citric acid), and is used in the chemical industry. In addition the red copper plate has outstanding weldability and can be made into various semi products and products through cold and thermoplastic processing. In the s,It has excellent conductivity, ductility and corrosion resistance.antages: low production cost and high production efficiency.The main force of iron ore futures closed at in The closing price of the day today was the same as that of the previous trading day, including * * * * ,KratieStainless steel welded pipe, * * * , settlement price , trading volume , and position volume . The intraday tradg volume decreased by compared with the previous trading day, and the position volume decreased by compared with the previous trading day. After six consecutive days of downward adjustment, there was a rebound at the bottom of the session today, but it was corrected again later, and the closing was flat.

The hard copper tube is not artificially treated after being drawn or extruded, so that it can be naturally formed. At this time, the organizational form in the copper tube is full. This kind of copper tube is more likely to crack and is not suitable for bending. Therefore, the hard copper tube is generally straight.Corrosive agents such as calcium bicarbonate, silicon phosphate crystal, etc. are added to the water to regulate the PH value of the water and the corrosion symptoms.antages: low production cost and high production efficiency.High quality and low price,After : on October , continue to implement the measures of stopping and limiting production specified in TZBZ [] No. document. All sintering machines and shaft furnaces using wet desulphurization in iron and steel enterprises in the city were shut down, and sintering machines using semi dry desulphurization continued to be shut down for %. The access of vehicles is alicted. The port collection and distribution vehicles are prohibited from entering and leaving the port area. The city s steel, coking, electric power, cement chemical and other key vehicle enterprises are not allowed to transport vehicles into and out of the plant. After : on October , the vehicle enterprises in the above industries will implement % of the peak load shifting emission reduction measures. It is estimated that the average daily consumption of sintering powder in Tangshan will be more than yuan, and the purchase of iron ore may still maintain a small amount of prudence. In addition, due to the influence of industrial users & amp; quot; coal to gas& quot;, the recent performance of coke is weak. Therefore, in terms of steel plant production, the support of raw materials is weak.Copper pipe has the characteristics of, and is the choice for the installation of water pipe, heat supply and refrigeration pipe.For small diameter pipes, when using filler metal, the length of filler metal is allowed to be equal to the diameter of the pipe, which is enough to fill the weld crater. One of the five major application fields of red coppr plate T, red copper bar and red copper tube: copper is the most widely used and used in the electrical and electronic industries, accounting for more than half of the total consumption. Used for various cables and wires, motors and transformers, switches and printed circuit boards; In the manufacture of machinery and transport vehicles, it is used to manufacture industrial valves and accessories, instruments, sliding bearings, molds, heat exchangers, etc.

The main force of iron ore futures closed at in The closing price of the day today was the same as that of the previous trading day, * * * , settlement price , trading volume , and position volume . The intraday tradg volume decreased by compared with the previous trading day, and the position volume decreased by compared with the previous trading day. After six consecutive days of downward adjustment, there was a rebound at the bottom of the session today, but it was corrected again later, and the closing was flat.where,In consideration of the above factors, more and more steel plants have stopped production since October and the production limit in Wu an and Tangshan heating seasons has been advanced. In addition, and the willingness to further replenish the inventory is not strong. In terms of supply the demand for iron ore in the future is likely to further deteriorate. The iron ore inventory of the steel plant is relatively high the formal implementation of production limit in & quot; +& quot; urban heating seasons after November by steel enterprises, the fourth quarter is generally the peak period for the shipment of imported ores. Although the production of domestic mines has been reduced due to environmental protection, the quantity of * * * is relatively limited. In general,Kratie2205 stainless steel plate, the short-term iron ore market may lack upward momentum.As the inner wall of the pipe rubs with water, its film is damaged, resulting in erosion corrosion. The higher the water pressure, the greater the flow, and the low-temperature pipeline in the oxygen production equipment can also be used. Some relatively thin copper tubes can be used to transport some pressurized liquids, and can also be used as pressure measuring tubes in instruments; In addition, the copper pipe is relatively firm, unlike other metals, which are easily corroded, so now many water pipes and refrigeration pipes used in buildings will choose to use the copper pipe.Kratie,If the corrosion on the copper surface is found to be slight, it can be erased with linen copper wire, but it is not recommended to apply oil for preservation.The room temperature tensile strength of the annealed red copper sheet is ~ kgf/mm, the elongation is ~%, and the Brinell hardness (HB) is ~To sum up, due to the influence of factors such as the current spot market price is much higher than the expected winter storage price of merchants, the gradual emergence of supply and demand pressure, and the weakness of raw material support, among which the contraction of market demand has a greater impact. Therefore, the author believes that in the short term, the spot building materials do not have the possibility to rise significantly, and the price of building materials may mainly operate in shock, but with the shrinking demand, the supply and demand pressure becomes prominent However, considering the influence of winter storage and other factors, it is still possible for merchants to lower the spot price in November.