行业新闻 Industry News
耐磨弯头能得到市场的青睐并不断取代一些传统的防磨材料，根本原因在于其优异的产品品质，以及在与传统防磨材料，如铸石、铸钢和离心浇注陶瓷材料相比所具有的多方面优势。性能比较
(1) 离心浇注复合陶瓷管
该工艺采用自蔓延离心浇注的方法成型，主要利用物质自身化学反应，放热燃烧产生高温，在燃烧波蔓延过程中合成新物质的技术。
(2) 铸钢（包括合金钢）广泛应用在防磨领域，其制造工艺相对简单。但由于材料本身性能的局限和工艺的限制，铸钢材料的表面硬度（约60）远低于陶瓷（80以上），耐磨性能仅相当于陶瓷的几十分之一至更低，（具体数据参见中南大学粉末冶金所的磨损试验报告和日本九州工业陶瓷研究所的喷射磨损试验结果），用其制造的弯头有投运一年多就磨穿的情况。此外，铸钢管道厚度大，非常笨重，且含碳量高，可焊性比较差，需现场对焊缝热处理，给现场的安装维修带来相当大的困难。
此外，从整个锅炉的吊架承载力来说，铸钢弯头、复合陶瓷弯头都是以重量和厚度来取胜，有的弯头磨损面壁厚达40多毫米，从机组设计看，无疑给吊架增加重量，缩短了使用寿命。 以上从性能和价格上对几种材质的弯管进行了对比，可见耐磨弯头无论是初期投入还是运行费用相比陶瓷材料有着非常大的性价比优势。
Welded pipe welded joints should take the side welding molding method. Jumper-style links, welding torch to point to the thick-walled tube-based, strict control of welding heat input, to prevent the welding deformation. Plug-three links, welding torch in order to bias the main charge, so welding heat input can be bigger. Should also control the welding speed and good welding layer temperature, to prevent the weld cooling too quickly. Welded pipe vertical error should be less than 2L ‰, and ≯ 2. To prevent distortion, and the branch in charge of inter-spot support, support using the same or similar base metal material, also used with the base metal electrode matching welding. Three welding completed before the support removed, pipe joints to polish the surface of the residue formation, local produce depression if the surface to be polished smooth after repair welding, and can pass through non-destructive testing for the next process. Weld joints welded pipe major drawback is incomplete penetration, cracks, porosity, slag. Welding quality control should note the following: Select the correct angle and their size; welding groove and the nearby former oil, rust, water and other debris must be clean, Chinese leather welding process to inter net; in accordance with the welding card select the appropriate welding parameters welding. Three of the connection should follow the "GBJ235-82 Industrial pipe construction and acceptance."