Copper processing

It is drawn seamless and repression. Light weight, good thermal conductivity, high temperature strength. Used in the manufacture of heat transfer equipment (such as condensers, etc.). Oxygen is also used for low temperature piping assembly equipment. Small diameter copper pipe used for conveying liquid under pressure (such as lubrication system, hydraulic system, etc.) and used as instruments of pressure measuring tube. Brass has strong, corrosion-resistant properties, and become first choice for modern residential housing contractor in all water pipes, heating, cooling pipe installation. 1, copper is economical. Since brass is easy to process and connection to the installation, you can save materials and total cost, stability reliably copper resistance, eliminating the need for maintenance. 2, copper is lightweight. The same inner diameter of the threaded pipe cutter, the brass does not require thickness of the black metal. When installed, the delivery costs brass smaller, easier maintenance and smaller footprint. 3, the shape of the copper can be changed. Because the brass can be bent, deformed, it often can be made into bends and fittings, brass allow smooth bending at any angle bend. 4, copper is easily connected. 5, copper is safe. No leakage, no combustion, no toxic gases, corrosion-resistant. Brass hard, difficult to corrosion, and high temperature, high pressure, can be used in a variety of environments. In contrast, many of the shortcomings of other pipes is obvious, such as the last residential multi-galvanized steel, easy to rust, not a long time there will be running water yellow, water and other smaller issues. Some material strength at high temperatures will rapidly decrease will have hidden dangers when used for hot water pipes, and the copper melting point of 1083 degrees Celsius, the temperature of the hot water system of copper pipes insignificant. Archaeologists found within pyramids of Egypt dating back 4500 years ago, copper pipes, still can use. Edit this paragraph brass classification and implementation of standard air conditioning and refrigeration equipment for Seamless Copper Tube GB / T 17791-2007 cable for Seamless Copper Tube GB / T 19849-2005 conductive Seamless, round copper tubes GB / T 19850- 2005 magnetron oxygen-free copper pipe GB / T 20301-2006 seamless inner grooved copper tube GB / T 20928-2007 Edit this paragraph copper weight formula, copper is copper: Copper was purple, and He said copper. Copper density is 8.96, melting point 1083 ℃, the quality of copper is calculated as follows: G = 8.96πδ (D-δ) / 1000 G: Quality kg δ: pipe wall thickness mm D: pipe diameter mm suitable for manufacture of copper Copper grades of T1, T2. T1T2 T1 chemical composition Cu + Ag99.95%, P0.001%, Bi0.001%, Sb0.002%, As0.002%, Fe0.005%, Ni0.002%, Pb0.003%, Sn0.002 %, S0.005%, Zn0.005%, O0.02%. T2 chemical composition Cu + Ag99.95%, Bi0.001%, Sb0.002%, As0.002%, Fe0.005%, Pb0.005%, S0.005%. Thermal conductivity (λ) 384 / W · (m · K) -1 than the thermal melting (C) 0.394 / kj · (kg · K) -1 edit this section copper copper specification nominal diameter (mm) 8 , 10,15,20,25,32,40,50,65,80,100,125,150, in 1/4 3/8 1/2 5/8 3/4 1 1 1/4 1 1/2 2 2 1/2 3 3 1/2 456 average outside diameter (mm) 9.52,12.7,15.88,19.05,22.22,28.58,34.92,41.28,53.98,66.68,79.38,92.08,104.78,130.18,155.58 K level 0.89,1.24,1.24, 1.24,1.65,1.65,1.65,1.83,2.11,2.41,2.77,3.05,3.40,4.06,4.78 wall thickness (mm) L level 0.76,0.89,1.02,1.07,1.14,1.27,1.40,1.52,1.78,2.03, 2.29,2.54,2.79,3.18,3.56 M class 0.64,0.71,0.81,0.89,1.07,1.24,1.47,1.65,1.83,2.11,2.41,2.77,3.10 edit this section copper application and uses copper Application is much more extensive than pure iron, each year 50% of copper is electrolytic purification of copper, for the electrical industry. Here, the copper, really have to be very pure copper over 99.95% of the job, a very small amount of impurities, especially phosphorus, arsenic, aluminum, etc., will greatly reduce the conductivity of copper. Copper oxygenated (easily mixed with a small amount of oxygen when copper) on a large conductivity for electrical industry generally must be oxygen-free copper. In addition, lead, antimony, bismuth and other impurities in crystals of copper will not combine to cause heat brittle, will also affect copper processing. This high purity copper, general electrolysis refining: the non-copper (ie blister) as the anode, copper as the cathode, copper sulfate solution as an electrolyte. When the current through the impure copper anode gradually melting, copper will gradually deposited on the cathode. Such refining of copper; purity of 99.99%. Copper is a comparison of pure copper, copper is generally considered to be approximate, electrical conductivity, have good ductility, but the strength and hardness of some poor.