Kobber ovalt rør

Beskrivelse

Oval Copper Tube

Copper has a single, “alpha” phase structure even up to relatively large percentage additions of secondary elements. However copper in the engineering sense is generally regarded as those alloys having less than 0.5% of any additional elements.

Thermal conductivity – better than gold or aluminium, copper excels in transferring heat. In short, drawn copper engineering tubing is used in engineering applications where a combination of properties are required:

• Electrical conductivity – and electric currents.
• Malleability – copper, especially phosphorous deoxidised copper (Cu-DHP) retains a combination of ductility and strength that has allowed it to be used for metal fabrication since before the bronze age. Because it work hardens, it can retain its formed shape after easy manipulation.
• Strength – in the hard condition copper has a tensile strength of about 385 Mpa.

Some characteristics of drawn copper tube:

Thermal and electrical properties

Like aluminium, copper has been used in the electrical industry for many years because it offers good electrical conductivity (about 150% that of aluminium). The purer the grade, the higher the conductivity: Cu-ETP and Cu-OFE are high purity grades, widely used for electronic and electrical applications.

Copper also has good thermal conductivity at about six times that of steel. As long as other requirements are satisfied (corrosion resistance, strength and electrical characteristics) copper may be a perfect choice of material.

Corrosion resistance & coatings

Copper is termed a “noble” metal as it resists corrosion in a wide variety of media.

Plating can be used to enhance the appearance, electrical performance or corrosion resistance of copper but can also cause problems if a galvanic cell is set up between plating and the copper substrate; specialist advice should always be taken.

Strong but malleable

Copper grades attain about 385 MPa when fully hard and over 200 MPa in the soft condition. Unlike steel, copper and its alloys become stronger at low temperatures and do not suffer the ductile/brittle transition of steel.

Copper tube is widely used to fabricate complex components where the combined properties of strength and ductility are required. Typical applications include gas and oil boilers, refrigeration and air conditioning plant. Copper is also pre-eminent in the field of household water systems.

Drawn Copper Tube

Drawn Copper Tube and alloys have been designed to match capabilities to needs and are amongst the oldest materials in the service of man.

Even small additions of a second element can significantly effect a property.

The alloying elements employed to alter the characteristics of pure copper used for copper alloy engineering tubing impart differing characteristics, often in combination: strength, temperature capabilities, machining properties or corrosion resistance. They all retain to some degree basic properties of copper: ductility, thermal and electrical conductivity.

All the alloys are fairly strong: high strength alloys can be treated to achieve well over 500 Mpa (aluminium brass reaches 550 and phosphor bronze over 650 Mpa).

China is a major producer and consumer of copper in the world. As a very common and important metal, copper is widely used in various industries. From the perspective of the proportion of the output of copper products processed in China, the output of copper tubes will be 2.14 million tons in 2021, accounting for 10.75% of the total output of copper products.

In recent two years, affected by the epidemic, the international copper price fell, leading to a sharp drop in China’s copper price. I 2020, the output of copper tubes will be 2.05 million tons, with a slight increase of 2.14 million tons in 2021.

From the perspective of the regional distribution of global copper pipe demand, China is the region with the largest demand for copper pipes in the world. I 2019, China’s copper pipe demand accounted for 54.1%, followed by Europe, North America, Japan, South Korea and other regions. The import and export data of copper pipes in China from 2017 to 2021 show that the export quantity and amount of copper pipes are always higher than the import quantity and amount. China is a big exporter of copper tubes. I 2021, China’s copper pipe export volume will be 230800 tons, 207200 tons more than the import volume. I 2021, China’s copper pipe export volume will be 14.702 billion yuan, 13.011 billion yuan higher than the import volume. From 2017 to 2021, the quantity and amount of China’s copper pipe imports remained stable, with small fluctuations. Affected by the epidemic in 2020, the number and amount of copper tube exports decreased slightly, but recovered again in 2021, and the overall copper tube exports showed an upward trend.

I 2021, Thailand will be the country with the largest export and import of copper pipes in China. I 2021, China will import 706 million yuan of copper tubes from Thailand, twice as much as Japan. I 2021, China will import 302 million yuan of copper tubes from Japan. I 2021, Shanghai will be the city with the largest demand for copper pipe imports, with an import amount of 796 million yuan. The second is Zhejiang Province and Guangdong Province, which are 309 million yuan and 292 million yuan respectively. The electronics, automobile and other industries in these regions are well developed, and there is a large demand for copper.

Kobberrør har god ledningsevne og er det vigtigste materiale til ledende tilbehør og varmeafledningstilbehør til elektroniske produkter. Kobberrør har stærk korrosionsbestandighed, er ikke lette at oxidere og reagere med nogle flydende stoffer. Det er det første valg for moderne entreprenører at installere vandrør, varme- og kølerør i alle erhvervshuse til boliger.

Kobberrør kaldes også kobberrør. Brugsmodellen vedrører et ikke-jernholdigt metalrør, som er et presset og trukket sømløst rør. Kobberrør har egenskaberne god ledningsevne og varmeledningsevne. Det er det vigtigste materiale i ledende fittings og varmeafledningsbeslag til elektroniske produkter, og er blevet det første valg for moderne entreprenører til at installere vandrør, varme- og kølerør i alle erhvervsbygninger til boliger. Kobberrør har stærk korrosionsbestandighed, er ikke lette at blive oxideret og reagerer med nogle flydende stoffer, så de er lette at bøje og forme;.

Omtrent 75% af kobberrør i Kina anvendes i køleindustrien. På grund af sin fremragende fleksibilitet, Varmeledningsevne og korrosionsbestandighed, Kobberrør bruges i vid udstrækning i fordamperen, Kondensator, Tilslutning af rør, rør og rørfittings til klimaanlæg, køleskabe og frysere, blandt hvilke klimaanlæg er de vigtigste nedstrøms. I 2021, output fra klimaanlæg, Husholdningskøleskabe og frysere vil stige betydeligt. I første halvår, udgangen vil være 15.85 millioner enheder, 44.35 millioner enheder og 15.85 millioner enheder, henholdsvis, 21%, 19% og 42%. Stigningen i køleproduktionen vil drive efterspørgslen efter kobberrør til køling.

I offshore teknik, Kobberlegering kondensatorrør har fremragende elektrisk ledningsevne, varmeledningsevne, korrosionsbestandighed og andre egenskaber., Det har brede anvendelsesmuligheder. På pressemødet i juni 2021, Den nationale udviklings- og reformkommission sagde, at 123 afsaltningsprojekter er afsluttet i Kina, med en samlet kapacitet på 1.65 millioner tons/dag. I handlingsplanen for udvikling af afsaltning og udnyttelse af havvand foreslås det, at 2025, det samlede omfang af afsaltning af havvand i Kina vil nå op på mere end 2.9 millioner tons/dag, og den nye skala af afsaltning af havvand vil nå op på mere end 1.25 millioner tons/dag, Så der er stor efterspørgsel efter kobberrør af varmevekslingskondensatorer.