At present， the fundamentals faced by the domestic copper bar market are still mixed. On the one hand， the market supply is expected to shrink， but on the other hand， the northern market has entered the off-season of demand， and the markets expectation of future demand is pessimistic. In the short term， domestic steel prices will enter the operating track of range consolidation. To sum up， considering the current situation of demand and inventory in the steel market， it is difficult for the steel market to make a breakthrough. As the th National Congress of the Communist of China is approaching， environmental protection phenomena such as steel mills are still going on， and black series speculation is still taking place. But personally， the fluuation range of the market in this region is limited， and the shipment transaction is * * *.
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， pumps， it will aggravate the corrosion of copper pipes. Oxygen in water causes corrosion.
구리 자체의 특성으로， 환경 습도가 높은 곳에서는 녹이 슬고 부식되기 쉽다.습도우리가 자주 사용하는 경우 문제가 더 적지만 오래 두면 구리가 손상됩니다.많은 사람들이 구리 표면을 어떻게 처리하는지 모릅니까?이제 직원이 답변해 드리겠습니다.
쿠 카.[] Welding process of copper pipe Clean the end and seven ports of steel pipe with steel wool. Do not use abrasive cloth or abrasive paper to clean， because it will affect the clean interface and result in poor welding effect.
동판， 동봉， 동관의 다섯 가지 주요 응용 분야 중 다섯 가지: 동은 의약에 쓰인다.세기 년대에 중국 의학 발명가 류퉁칭과 류퉁러는 구리가 매우 강한 s를 가지고 있음을 발견하고 해당하는 &를 개발하는 데 성공했다.quot；암 억제 및;“；，이것은 머지않아 성공할 것이다.
The market opened today. Although the performance of Zitong Pai futures was modest，동경.7075 알루미늄 막대， the overall market has stopped. The market mentality has not changed much sincekend. The price is stable， but some specifications are subject to negotiation， and the negotiation range is about - yuan. The overall rhythm of the market is stable and cold. In the middle of winter， the overall market in Northeast China has entered the traditional off-season， and all construction sites have been closed. In addition to the transportation pressure brought by the low temperature， the market was bleak.
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， However， considering the influence of winter storage and other factors it is still possible for merchants to lower the spot price in November.
The above two types of thermal connection usually use the term welding， because in both cases， molten solder is written into the narrow gap on the clean and close solid metal surface of the two devices to be installed.
장 & # ;우리는 동관 재료의 장점을 상세히 서술했다: 동관 지온은 뜨거운 물을 열매체로 이용하여 동관 가열관에서 순환하고 바닥을 가열하며， 지면을 통해 복사와 대류 전열 방식으로 바닥을 가열하는 일종의 가열 방법을 말한다.. 동관은 열을 방출하는 효과가 빠르고 내열성이 강하다.고온으로 물을 공급하는 상황에서도 지온관의 사용 수명은 영향을 받지 않는다.둘동관은 금속관이고，o 잘 안 긁혀요.따라서 누설은 쉽지 않다.셋고온에 강하고 고압에 강하며 어떤 일반 플라스틱 파이프에 비해도.동관 바닥은 따뜻하고 고온과 고압에 강하다.사수명이 길다.다섯
물품 보험또한 쉽게 부식되지 않으며 다양한 환경에 적응할 수 있습니다.그것은 저온과 고온에서 정상적으로 사용할 수 있기 때문에 다른 곳에서는 여러 번 동관을 선택해야 한다.
금주(-， 홍동봉의 시장가격이 상승하여 거래가 좋지 않다.지난 주말 사강의 입찰일， 가격이 안정되어 시장을 지탱하였고， 주말에는 강판의 상승으로 시장이 일파만파 상승하였으며，동경.T2 동갈비， 주말에는 각종 선재의 가격도 위안 상승하였다.그러나 거래가 매우 나빠 가격이 상승했다고 보도되었다.)다음 이틀간의 식탁.수요일까지 미래 시장에 대한 부정적인 전망과 오후 나선형 다이빙 중 철강 벽돌의 감소로 인해 시장은 가격을 인하했다.시장가격 변화로 신집은 일 원 상승했습니다.후장에 대해 말하면 비수기가 곧 다가오고 수요가 약화되여 시장의 관망정서가 더욱 짙어지고있다.그러나 겨울이 왔을 때 환경 보호 검사가 점점 더 엄격해져 시장을 지탱했다.예상당분간 메탈 실크는 미약한 방식으로 조정될 것이다.
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.
In 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， 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，동경.2205 스테인리스 강판， and the recent spot price of Lecong market has a large gap with that of the north.
환영 하 다단점: 생산량이 낮고 생산 원가가 높으며 가격이 높다.압출 동관 공예는 현재 국내외의 안정적이고 우수한 동관 생산 방법이다.오직 이런 공예로 생산한 동관만이 난방분야에 더욱 적합하며 이는 동관업종의 미래의 발전방향이다.
동관의 방부 방법은 과학 연구를 강화한다.
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.
동경.Today， the price of tube billets is up and down. At present， Jiangxin hot rolling is yuan continuous casting yuan is down yuan， Dongfang hot rolling yuan is down yuan， Luli hot rolling yuan is down yuan， Tiangang hot rolling an is down yuan， production is stopped in mid January， Weigang hot rolling yuan is up yuan， continuous casting yuan is up yuan， Huaigang yuan is up yuan， Zhongtian yuan， Changqiang yuan， Linggang yuan.
Tangshan billets rose sharply last weekend， steel mills in some northern cities implemented production restriction， and some domestic economic data improved， which boosted manufacturers confidence. Today， steel prices generally rose. However， the construction progress of the downstream construction site is affected， which is not conducive to the continuous demand. The high spot price transaction today is weak， which is difficult to support the continuous rise of steel prices. It is expected that the building materials market will maintain a volatile trend tomorrow， and some businesses may reduce prices and take goods.
The production method of soft copper tube is basically the same as that of hard copper tube， that is the annealing process is added compared with the hard copper tube. Annealing of copper tubes means that they are calcined in a high temperature furnace to change the arrangement of the elements in the copper tubes. However， after annealing， which makes it easier to bend. The copper tubes produced in this way are called soft copper tubes.