(2) titanium tube heat exchanger in the refining and chemical application Titanium has excellent corrosion resistance, high strength and good workability, thus refining and chemical industry has been applied earlier in the United States, Europe, Japan titanium and other applications for over 40 years, has nearly 20 years in China. Titanium is mainly used for coolers, condensers and heat exchangers, not only for the water cooler, but also for the oil and gas heat exchanger; not only for the new system of titanium tube heat exchanger, can also be used as a transformation of titanium pipe replacement Brass (still with brass plate) cooler. Japan from 1955 began to use titanium resolve atmospheric and vacuum low-temperature H2S-HCl-H2O environmental corrosion problems. Europe as early as 1960 will be applied to titanium heat exchanger refinery, initially mainly to solve the seawater, brackish water, erosion and pollution, and later used to prevent corrosion of low-quality crude oil and gas and corrosive to equipment. In recent years, due to more domestic crude oil imports from the Middle East, and higher sulfur content crude oil, which brings transformation titanium refining equipment to improve the material to adapt to the Middle East sour crude refining corrosion requirements. With the increase of domestic crude oil extraction, which also increased the amount of sulfur containing acid salt of titanium tube heat exchanger, diversification and low-quality sources of oil, the equipment corrosion problems are more prominent, and improve the selection criteria, the choice of titanium the manufacture of certain key sectors of serious corrosion heat or condensation cooling equipment, oil refining chemical energy conservation, efficiency, one of the main measures. Chemical activity of large chemical activity of titanium is large, a strong chemical reaction with atmospheric O, N, H titanium alloy products, CO, CO2, water vapor, ammonia and the like. Carbon content greater than 0.2%, it will form a hard TiC in the titanium alloy; at higher temperatures, and also the role of N forms TiN hard surface; at above 600 ℃, the high hardness of hardened layer is formed of titanium absorbs oxygen ; hydrogen content increased, brittle layer will form. Absorbing gas produced brittle surface to a depth of 0.1 ~ 0.15 mm, the degree of hardening of 20% to 30%. Chemical affinity of titanium titanium gauge also large, easy and sticking friction surface. Thermally conductive elastic small thermal conductivity of titanium λ = 15.24W / (mK) approximately 1/4 of nickel, iron 1/5, 1/14 aluminum, and a variety of thermal conductivity than the thermal conductivity of titanium alloys decreases approximately titanium 50%. Titanium elastic modulus of about 1/2 of titanium steel coil, so the difference in stiffness, deformation, not making slender rod and thin-walled parts, cutting a large amount of the machined surface of the rebound about stainless steel 2 to 3 times, after causing the tool flank face intense friction, adhesion, adhesive wear. Titanium tube coolers, titanium, acid corrosion by Special Metals Co., Ltd. Weifang djeke. Weifang djeke Special Metals Ltd. (www.taihuanreqi.com) (www.taihuanreqi.com) strong, credible, Shandong Weifang chemical equipment industry has accumulated a large number of loyal customers. The company better work attitude and continuous improvement will lead djeke innovative ideas into the brilliant and you work for a better future!