A method for preserving long urban network with a long strip from the corrosive effects of urban network environment, including carburizing and nitriding, uniform surface layer of chromium oxide. However, a typical nitrogen-6% hydrogen atmosphere in a sintering furnace hot zone of operations, reduce environmental damage protective chromium oxide scales. Then it will be a lower temperature by re-oxidation, and then stored in the cooling zone further oxidation. Therefore, the long urban network with a reduction in cyclic oxidation furnace. It has been observed that the life, so that a long service life can be extended with a urban network, increasing the moisture content of typical nitrogen atmosphere sintering. The dew point of the atmosphere are heated zone furnace can increase the oxygen partial retention of chromium oxide scales on the belt surface. Appropriate adjustments to long urban network with a moisture content of no decarbonization parts are sintered. Given the environment described, it discusses the degradation of 314 stainless steel mesh belt is exposed to two nitrogen-based atmosphere sintering furnace: similar to a typical nitrogen-6% hydrogen mixture and modified the composition of the gas mixture. Modified atmosphere furnace set up using the newly developed cost-effective humidification system. The atmosphere is modified to maintain a protective chromium oxide on the surface of the entire belt sintering process and at the same time oxidation decarbonization of sintered parts. Ning Xi Lu factory specializing in the production chain network Horseshoe chain manufacturers. I produced the high-quality selection of Horseshoe Horseshoe chain link material, light weight Horseshoe chain belt, mesh chain horseshoe chain gap large, flat surface, smooth running, will not go astray and so on. It is widely used: food, washing stainless steel horseshoe chain, drying, cooling, heat treatment of the transfer line. Also demand side hemming or welding according to customers. It can also be installed on both sides of the chain - chain-Horseshoe chain. Our company also specializes in a variety of specifications, materials chains, sprockets, chain net, chain conveyors, conveyor and parts production. I (西卢 chain network) in "good faith" attitude, won the praise of new and old customers. Turn Horseshoe chain, 西卢 chain network Factory (certification), Pingliang Horseshoe chain by Ningjin 西卢 chain network plant. Ningjin Xi Lu chain network Factory (www.njxllw.cn) Shandong Dezhou, chains, sprockets leaders, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Xi Lu chain network in the plant leadership with the staff warmly welcome all inquiries negotiations to create Xi Lu chain network plant a better future.