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， the welding flux must have a degree of corrosivity， and shall be cleaned after brazing. The so-called "self-cleaning" fluxes are generally not recommended because of their corrosivity.
Overview of three production methods of copper tube Copper tube is a very important material for copper materials. There are many ways to complete the production of this copper tube. For copper pipes， the following three methods are generally used to produce materials. The copper tubes produced by these three methods are not only very good in performance， but also very convenient to operate. There are three production methods for copper tube， so what are the three production methods for copper tube?
청경채.Methods of copper pipe anti-corrosion Strengthen scientific research.
Disadvantages: Due to loose tissue and high pressure resistance， the pipe is only used to produce small air conditioning copper rods.
무 사자 증동관은 일종의 비철금속관으로서 압제하고 늘어나는 무봉관이다.동관은 열전도성이 뛰어나고 견고하며 부식에 강하다.환경 온도에 비해 갈라지지 않기 때문에 모든 주택 분양주택에 수도관， 난방관， 냉동관을 설치하는 것이 현대 하청업체의 우선순위가 되었다.
In addition， it is not easy to be corroded and can adapt to various environments. It can be used normally at low and high temperatures， so copper pipes need to be selected for many times in other places.
Strong connection firmness of copper pipe: the connection between copper pipe and copper fittings is strong.
적동판 T， 적동배출， 적동관 대 응용분야의 : 구리는 화학공업업종에 널리 응용되여 진공용기， 증류탱크， 양조탱크 등을 제조하는데 사용된다.
용접 후， ~ ℃ 에서 퇴화하여 & amp;quot；자열 & amp;quot；압력.
동관은 동관， 비철금속관이라고도 한다.그것은 일종의 압라무봉관으로 무게가 가볍고 열전도성이 좋으며 저온강도가 높고 부식에 견디는 등 특징을 갖고있다.동관은 이런 우수한 재산을 가지고 있기 때문에， 동관의 사용은 매우 보편적이다.경동관과 연동관은 사용 과정에서 어떤 차이가 있습니까?양자는 구체적인 응용 방면에서 어떤 차이가 있습니까?
높 은 가치동관의 세 가지 생산 방법 중에서 산화법이 가장 많다.금속 구리가 양극에 의해 산화되고 양극의 구리 이온이 관 재료에 부착되면 구리 관을 생산할 수 있기 때문이다.여기방법도 구리 재료를 생산하는 가장 상용하는 방법이다.그것은 오랫동안 사용되었을 뿐만 아니라 산화 반응을 통해 구리 파이프를 생산하는 성숙한 기술이 있습니다.이런 생산 방법은 중국 동관의 주요 생산 방법이다.
This week (- the market price of red copper bar rose， and the transaction was not ideal. On the bidding day of Shagang last weekend， the price was stable to support the market， and the rising of billets at the weekend drove the market up in a wave， and the price of variety wire rods also rose by yuan at the weekend. However， it was reported that the deal was very poor， due to the negative outlook on the future market and the reduction of steel billets in the afternoon spiral diving， the market lowered the price. Market price changes， Xinji rose yuan on the rd; For the future market， the off-season is coming， the demand is weakening， and the market wait-and-see mood is getting stronger. But when winter comes the environmental protection inspection is becoming more and more strict， which supports the market. It is expected that the price ofety wire rod will be adjusted in a weak way in the short term.
When placing they should be stored separately according to the different components， and should not be mixed together. The copper surface may have electrolytes， especially with other materials such as rubber， which has a large impact.
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， pumps， etc.
업무 설명동관은 일종의 비철금속관으로서 압제하고 늘어나는 무봉관이다.동관은 열전도성이 뛰어나고 견고하며 부식에 강하다.환경 온도에 비해 갈라지지 않기 때문에 모든 주택 분양주택에 수도관， 난방관， 냉동관을 설치하는 것이 현대 하청업체의 우선순위가 되었다.
How to make copper tubes shine copper is stable in dry air， generating a layer of green material， commonly known as "copper green"， and its main component is "basic copper carbonate". So， how to remove verdigris? We can remove the verdigris by mechanical friction， but this is not only troublesome， but also will damage the surface of the bronze. Heres a good way to remove verdigris. Use a measuring cylinder to measure ml of concentrated ammonia water and put it into a beaker， then add ml of distilled water， stir it with a glass rod to prepare ammonia solution， that is， thus removing the verdigris. In order to improve the effect of removing verdigris from the copper polishing water， chalk or talcum powder can also be mixed into the copper polishing water， which can increase the mechanical friction， fully expose the deep layer of copper rust， ensure the complete reaction of verdigris and ammonia， and make the copper surface smooth and bright. Dip cotton in copper water and repeatedly scrub copper products with copper rust. Soon， the copper rust disappeared from the surface of the bronze ware， and the copper products showed a bright metallic luster again， while the cotton was dyed blue. When the verdigris on some copper products are not easy to remove， soak them in the copper scrubbing water for a while， and then scrub them with cotton dipped in the copper scrubbing water.
The market price of Zhengzhou copper bars is basically stable， and the shipment is not good. In terms of tube blank: today， Shandong Luli tube blank slightly reduced by yuan， and the current mainstream ex factory price is - yuan. In terms of pipe plant: Linyi Pipe Plant locked the price for a week. With a stable market mentality， the factory price of hot rolled seamless pipes is now between - yuan. On the market side: with the arrival of the off-season， traders generally ship goods at a high price. Replenishment is mainly to maintain the existing inventory， and there is no large replenishment plan. The demand is sluggish， and the market price of Zhengzhou copper bar is expected to be stable and declining.
청경채.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 citys steel， coking，청경채.15CrMo 합금 강판， 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 "coal to gas"， in terms of steel plant production， the support of raw materials is weak.
However， it is difficult to change this situation too much in the short term. It is expected that the domestic strip steel price will mainly rise in the short term. It is reported that in order to pursue profits， Tangshan Iron and Steel Group Co.， Ltd. is currently increasing the supply of hot coils. It does not rule out that more steel mills in the future are inclined to one end of the plate in pursuit of profits，청경채.T2 동갈비， or to lay hidden dangers for the decline. As far as tomorrow is concerned， the price may still maintain a narrow range of shock operation pattern.
Disadvantages: low output， high production cost and high price. Extrusion copper tube process is a stable and excellent copper tube production method at home and abroad at present. Only the copper tubes produced by this process are more suitable for the field of heating and ventilation， which is the development direction of copper tube industry in the future.