After the pipe is cleaned， the welding flux and flux shall be immediately applied to the interface and the bayonet clearance. Sufficient flux shall be thinly coated on the mating surface and assembled immediately， so that dust and dirt will not pollute the capillary gap.
철광석 선물 주력은 에서 로 마감했다. 이날 종가는 ***， **， 결제가 ， 거래량 ， 보유량 를 포함해 전 거래일과 같았다.일내 거래g 거래량은 전 거래일보다 만 명， 보유량은 전 거래일보다 만 명 줄었다.일 연속 하향 조정 후 오늘 장중 하단에서 반등하였으나， 그 후 다시 반등하여 보합으로 마감하였다.
뮌헨Four in one formula and process conditions Preparation of solution Take formula as an example: mix the calculated amount of water for zinc oxide into a paste slowly add it into the calculated amount of phosphoric acid under stirring until it is completely dissolved， then add zinc nitrate and tartaric acid， dilute it with water to / of the total volume， add sodium alkosulfonate and OP emulsion， and stir to make it completely dissolved. Then add chromium dihydrogen phosphate dissolved in dilute phosphoric acid， and add titanium sulfate. After all materials are added， stir them to make the solution even， cool them to room temperature， put a large amount of iron filings in the solution， and soak them for - days to make them contain enough ferrous ions. When the content of ferrous ion reaches above g/L， and then the solution can be used at elevated temperature. When the ferrous ion reaches the above value， the phosphating speed is fast the solution is stable， and the phosphating film is fine and dense. During operation， attention shall be paid to controlling the temperature. If the temperature is higher than ℃， the degreasing technology of degreased copper pipe. How to make degreased copper pipe? The process flow of degreased copper tube? What are the characteristics of degreased copper tubes? Use of degreased copper tube? There are too many questions. Lets solve them at once. Everyone knows the copper tube. Nitrate reacts easily. The heater should be installed on the two walls of the tank， not on the bottom of the tank， to prevent local overheating. Stainless steel pipe or iron pipe should be used for heater， and lead pipe or copper pipe should not be used to avoid contamination of solution by impurities. What is degreased copper pipipe? "The advantages of degreased copper pipes comprehensive treatment of grease， rust removal， reduce the work area， save equipment costs， shorten working hours， improve labor productivity and reduce costs. This method can only be used in the occasions where the requirements for coating quality are not high.However， in actual production due to the amount of oil contamination， the consumption rate of each component in the solution is different， so attention should be paid to adjustment and control to maintain its due role. What is the degreasing copper tube? "I have roughly known the degreasing methods of degreasing copper tubes: solvent degreasing，뮌헨황동판， alkali degreasing， ultrasonic degreasing， high pressure hot water degreasing， electrolytic degreasing， etc. Solvent degreasing: use degreasing solvent to dissolve the oil on the surface of red copper pipe， collect it together into a container， volatilize collect and reuse the volatile solvent， and separate the pollutants from the circulation system. This method was used in the early stage， which has problems such as low cleaning efficiency， difficult maintenance， and environmental pollution. In recent years， many kinds of surfactants have been developed. The lipophilic group of surfactants can help to dissolve oil in water to realize degreasing. Alkali degreasing: Alkali degreasing is a complex chemical physical process. In addition to saponification reaction， there are sometimes emulsion reaction and adsorption reaction. Typical saponification reaction formula is as follows: RCOOH+NaOHRCOONa+HO At present， industrial degreasers are composite reagents， and the solution temperature is ℃. Ultrasonic degreasing: ultrasonic degreasing is to degrease the upper and lower surfaces of red copper pipes by using ultrasonic to generate high-speed vibration， whichtly used for monomer and irregular shaped components. High pressure hot water degreasing: without degreasing agent， heat the deionized water to ℃， and spray it directly to the surface of red copper pipe for cleaning under the pressure of about bar. Electrolytic degreasing: electrolytic degreasing， using the red copper tube as the cathode to generate H， which will scour the oil stain on the surface of the red copper tube; The O generated by the anode is in atomic state and has strong oxidation capacity， which can improve the degreasing effect. Therefore， the problem that alkali spraying and brushing cannot fully contact the micro concave part of the surface is solved. Generally， the cleaning effect of alkali degreaser spraying or high-pressure hot water degreasing plus brushing can meet the requirements of most users. If there are special requirements， the degreasing effect of various degreasing methods (one side of the copper tube) is as follows: alkali degreaser spray plus brushing: mg/m alkali degreaser brushing plus electrolytic degreasing: mg/m ultrasonic wave: mg/m high-pressure hot water degreasing: 바 타The second of the five application fields of red copper plate T， red copper row and red copper tube: copper is widely used in the chemical industry to manufacture vacuum vessels， distillation pots， etc. 상술한 바를 종합하면， 현재 현물 시장 가격이 상인들이 예상한 겨울 창고 저장 가격보다 훨씬 높은 등 요소의 영향으로철광석 가격이 상승함에 따라 철광석 가격지수는 한때 달러 아래로 떨어져 수입 광석의 출하 열기를 떨어뜨렸다.이밖에 환경보호검사가 더욱 엄격해져 일부 국내광산의 공급이 큰 영향을 받았다.현재 국내 광산의 가동률은 이전 최고치보다 % 포인트 낮아 앞으로 더 떨어질 것으로 보인다. 압출법: 본 생산 방법은 정련 후 구리 주괴를 주조하고 차 가열 후 대형 압출기로 구리 파이프를 압출한다.
Although the opening continued the weak trend， the intraday transactions improved， and the prices of some copper bar manufacturers rose. From the specific situation， although the manufacturer feedback that the shipment is average，뮌헨12Cr1MoV 합금 강판， the mentality is relatively calm， the market inventory is not much， and the manufacturer is not willing to significantly reduce the price. In terms of the market， the transaction of strip steel is better than other steel varieties， and the downstream mainly focuses on callback buying without panic inventory clearing. It can be seen that although the steel market continues to shake， the overall demand for strip steel remains in a good state.
The evaporated zinc is immediately turned into zinc in the air， forming white smoke， which brings great difficulties to the operation and affects the health of welders. Therefore， in the places where decorative brass pipes are welded， ventilation and other protective measures should be strengthened. The poor weldability of brass will cause problems such as pores， cracks， zinc evaporation and so on.
If you want to avoid this kind of situation for a long time， you can choose passivation treatment. In this way， not only is the copper surface serious， it can be cleaned under normal circumstances， but it is not a big problem to keep it in the air for one year or more after ultrasonic treatment and immersion treatment， so this effect is very good.
검증 방법그것은 우수한 전도성， 열전도성， 연전성과 부식성을 가지고 있다.
Disadvantages of copper pipe As far as copper pipe is concerned， high production cost and high price are its biggest disadvantages. Compared with other pipe fittings， the cost of copper pipe is much higher， and the connection at the copper pipe interface requires high construction technology level.
In the morning trading today， the price of domestic copper bar fell. According to the monitoring data of Lange Steels cloud business platform， the average price of * mm hot rolled strip in key cities in China is ， down yuan from yesterday. Futures prices fluctuated， and the prices of spot market manufacturers eased slightly today. According to the feedback， the market was mainlysee yesterday， which caused the overall transaction blocked and the mainstream manufacturers prices fell today.
The application of copper tube The copper tube is generally used in the heat exchange equipment， 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.
안전 요구In Jiangyin market， another distribution center， the overall inventory of the current circulation link is about tons slightly lower than the normal level. At the beginning of this week， the price gap between Jiangyin prices and those in the north has also been able to correspond to the slightly lower circulation inventory. However， from the perspective of the policy port of the steel plant， the overall production situation of Nangang，뮌헨316L 스테인리스 파이프， Hengrun， Dada， etc. is relatively normal， and the amount of resources in the later period remains stable. The overall inventory of Lecong market remains at about to tons， which is a medium normal level， and the recent spot price of Lecong market has a large gap with that of the north.
희박한 액체 기름때와 가벼운 녹을 제거하고 일정한 내식성을 가진 인화막을 생성하는 데 적합하다.ex 표 참조충분한 레시피와 조작 조건.표 탈지， 녹 제거， 인화 및 둔화
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?
뮌헨Disadvantages of copper pipe As far as copper pipe is concerned， high production cost and high price are its biggest disadvantages. Compared with other pipe fittings， the cost of copper pipe is much higher， and the connection at the copper pipe interface requires high construction technology level.
월에 국내 중후판 가격이 대폭 하락했다.월 일까지 주요도시의 일반탄소판가격센터는 이미 으로 내려가 월말에 비해 톤당 원 하락했다.이달 초， 거시적인 나쁜 소식과 최근 기본면이 좋지 않은 영향으로 시장심리상태가 비관적으로 전환되였고 일부 거래원들은 저가로 출하했다.시장재고가 상승하고 재고압력이 높으며 재고부족현상이 소실되고 시장거래분위기가 랭담하며 수요표현이 지속적으로 하락하고 현물가격이 압력을 받아 하락하고있다.
당산강판이 지난 주말에 대폭 상승하여 일부 북방도시의 강철공장이 생산제한을 실시하였고 일부 국내경제수치가 다소 개선되였는데 이는 제조업체의 신심을 진작시켰다.믿음오늘날 강재 가격이 보편적으로 상승하고 있다.그러나 회의가 다가오고 태풍으로 인한 남쪽의 비가 내리면서 하류 공사장의 공사 진도가 영향을 받아 지속적인 수요에 불리하다.고현물 가격 거래이 지역 시장의 평가 범위는 제한되어 있으며， 기업은 단기간에 유연하게 경영할 수 있으며， 선적 거래는 * * * 이다.