Petroleum refinery waste gas, natural gas or oil as raw materials, through a series of chemical reactions can be produced ethylene, propylene, acetylene, etc., and further synthesis can produce ethylene, polystyrene, acetone, butadiene, etc.. For the synthesis of the process is similar to the chemical industry, will be exposed to various types of acidic media, corrosive service environment is quite harsh, and the medium conditions change the magnitude of the larger range of materials used is also wide, involving the commonly used austenitic stainless steel: 304 stainless steel tube, 316 stainless steel tube, 321 stainless steel tube, duplex stainless steel tube: 2205 stainless steel tube, 2507 stainless steel tube. Ferritic stainless steel tube: 430 stainless steel tube 410 stainless steel tube, iron-nickel-based corrosion-resistant alloy tubes and nickel-based corrosion-resistant alloy tubes: 625 corrosion-resistant nickel alloy tube, C-276 corrosion-resistant nickel alloy tubes, 825 corrosion-resistant alloy tubes and so on.

Stainless steel seamless pipe compared with stainless steel welded pipe: Stainless steel seamless pipe structure is better, can withstand higher pressure higher temperature resistance and corrosion resistance performance is better and more beautiful. Stainless steel seamless pipe compared with ordinary carbon steel pipe: Stainless steel seamless pipe air corrosion resistance and resistance to water and general media corrosion, better toughness, high temperature creep resistance performance is better, longer service life, beautiful surface. Comparison of seamless stainless steel pipe and plastic piping: Seamless stainless steel pipe can withstand heat and high temperature, high strength to withstand higher pressure, better wear resistance, better hygiene performance, after a strict distribution ratio control and processing can do antibacterial and non-toxic.

With the development of the automobile industry, stainless steel in the automobile industry is increasingly widely used, the scope of application is not limited to decoration, has been extended to the frame, exhaust system, engine parts.At present, a family car consumes about 20 to 30kg of stainless steel, Japan in the early 1990s, the annual stainless steel used in the automobile industry is about 100,000 to 130,000 tons. Stainless steel automobile frame automobile frame or high-speed passenger car body shell, has been successfully manufactured by the stainless steel containing 11% to 12% Cr, life expectancy of at least 10 to 20 years. These grades include 409 (00Cr11Ti), 40800Cr12TiNbAlAM363 (0Cr11Ni4Ti), 00Cr12NiTi and so on. The latter in South Africa, the United Kingdom, Australia, Belgium and other countries have been used in large buses, coal transportation vehicles, urban subway vehicles and a variety of sweepers, sprinklers, trailers, etc., sometimes used in combination with 06Cr19Ni10 stainless steel. It is expected that the demand for such stainless steel in Europe will reach 1 million tons. Proof of use: after running 1.2 million kilometers, the exposed part of the frame is still in excellent condition, by the stone collision caused by the coating flaking of the exposed part of no signs of corrosion. The unprotected parts of the car show no signs of corrosion and the surfaces are as smooth as ever. Exhaust system with stainless steel pipe and related stainless steel materials, automotive exhaust system has been changed from aluminum-plated materials to stainless steel materials to ensure that the operation of 5 years without maintenance requirements, from the economic and practical point of view, the general selection of 0Cr11Ti (409) type of ferritic stainless steel, while the Japanese are more grades, basically 13Cr ~ 17Cr ferrite stainless vanadium and its improved type, in some parts also The use of Cr-Ni austenitic stai