일반적으로 산소아세틸렌을 기원으로 사용하고 액화석유가스 용접도구를 사용하여 가열한다.용접 도구의 용접봉은 이음매를 향하고 계속해서 전체 이음매를 가열해야 한다.이것은 과도한 국부 가열을 피할 것이다.
When welding， just add enough filler metal to fill the capillary gap. Too much filler metal will only form a ball at the bottom of the joint or run into the pipe.
산나물As 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 more serious the corrosion.
먼저 구리 파이프를 가열하고 용접한 다음 이음매를 가열하여 가열된 부분이 진홍색으로 변할 때까지 가열합니다. 이때 충전 금속이 파이프와 접촉할 때 충전 금속은 용해되어야 합니다.
페리 아 고 다This week (-， the market price of red copper bar rose， and the transaction was not ideal. On the bidding day of Shagang last weekend，산나물5083 알루미늄 바， 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， which led to the price being stable for the next two days. Until Wednesday， 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 extrude copper tubes by large extruder after secondary heating.
현재의 전체 가격차를 감안할 때 which supports the market. It is expected that the price ofety wire rod will be adjusted in a weak way in the short term.
Extrusion method: This production method is to cast copper ingots after smelting， 오늘 현지 동봉 가격은 계속 높은 수준으로 상승하고 있지만， 화동 지역 이외의 지역은 뚜렷한 후속 추세가 나타나지 않고 있으며， 현지 가격은 여전히 동북과 화중 지역과의 가격차의 우세를 가지고 있다.생산 제한의 영향으로 현지의 후속 상품량이 비교적 적기 때문에， 현지의 재고 압력은 더욱 낮아질 것이며 동봉 가격의 지탱은 여전히 강하다.그러나 현재 국내 부동산 통제는 여전히 강화되고 있다.시장 & # ;미래의 수요에 대한 시장의 예상이 약화되고 있습니다.오늘 심양 동봉의 시장 가격이 안정되어 출하량이 좋지 않다.
If you want to make the copper surface become bright again， you can polish it with copper point solution. It can not only make the copper surface brighter， but also quickly remove the rust and oxide layer on the copper surface to restore the luster of the copper itself.
The copper pipe has high welding precision， fast production speed， good surface finish and beautiful appearance. Therefore， it is widely used in precision welding industries such as glasses， hardware， electronics， accessories， sanitary ware and kitchenware.
It can be wrapped with moisture-proof paper for moisture-proof protection. It can also prevent oxidation to a certain extent. If cracks or serious corrosion are found， they must be isolated.
실행 기준The 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 * * * * ， * * * ， trading volume ， and the position volume decreased by compared with the previous trading day. After six consecutive days of downward adjustment， but it was corrected again later， and the closing was flat.
또한 쉽게 부식되지 않으며 다양한 환경에 적응할 수 있습니다.그것은 저온과 고온에서 정상적으로 사용할 수 있기 때문에 다른 곳에서는 여러 번 동관을 선택해야 한다.
오늘날 벽돌의 가격은 높아졌다 낮아졌다 한다.현재， 강흠열간 압연은 위안， 연주 위안은 위안， 동방열간 위안은 위안， 노력열간 압연은 위안은 위안， 천강열간 압연은 위안 하락한다안강은 원 하락하여 월 중순에 생산을 중지하였고 위강열연은 원으로 원 상승하였으며 련주 원으로 원 상승하였고 회강 원으로 원 상승하였으며 중천 원， 장강 원， 릉강 원이였다.
또 다른 집산지인 강음시장에서 현재 유통단계의 전체 재고는 약 만 톤으로 정상 수준보다 약간 낮다.이번 주 초 강음 가격과 북방 가격 간의 가격 격차도 약간 낮은 유통 재고에 대응했다.그러나 제철소 정책항을 보면， 남강， 항윤，산나물15CrMo 합금 강판， 다다 등 전체 생산 상황은 비교적 정상이며， 후기 자원량은 안정을 유지한다.락종시장의 전반 재고는 만~만톤 좌우를 유지하여 중등정상수준에 속하며 최근 락종시장의 현물가격은 북방과 비교적 큰 차이가 있다.
투자 하 다.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， with the approaching meeting and the rainfall in the south caused by the typhoon， 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.
To prevent core problems of copper tubes， the outlet tempmperature of copper tubes should be well controlled. The cooling capacity of the annealing furnace in the cooling stage should be improved by equipping a refrigeration unit for the annealing furnace， so as to ensure that the outlet temperature of copper tubes does not exceed ℃. By controlling the outlet temperature of copper tubes，산나물동대， the problems of the core of coil tubes and the inner wall of the purging inlet end can be solved.
Strong connection firmness of copper pipe: the connection between copper pipe and copper fittings is strong.
산나물Red copper plate has ductility. Pure copper， which is as big as a drop of water， can be pulled up to two kilometers of thin wire or rolled into a transparent foil larger than a bed. The most valuable property of red copper row is that it has a very good conductive ， second onlyver in common metals. But copper is much cheaper than silver， so it has become the "protagonist" of the electrical industry.
Advantages and scope of application of copper tube ground heating At present， ground heating is not only a comfortable heating method， but also a symbol of modern life quality. More and more houses， public buildings， sports facilities， industrial facilities and other places begin to use ground heating radiator， which is an important part of ground heating. Due to the corrosion resistance of copper， copper tubes are selected as the main material of radiator in many places.
When stacking， it shall be stacked reasonably and placed first.