Thread Content
Currently, the high flash point valves used in vaporization furnaces are generally made of ordinary cast bimetallic materials. These materials expand and contract with temperature changes, and they are not metallurgically bonded to the outer steel structure; as a result, they cannot be welded or repaired. This makes it difficult to avoid the formation of pores and inclusions. Moreover, cavitation and impact within the flash vaporization buffer device can easily cause the wear-resistant layer to come off, requiring the entire valve to be replaced in such cases. The surfacing with a high-chromium alloy bimetallic layer precisely compensates for the shortcomings of casting: it offers excellent wear resistance, is metallurgically bonded to the outer steel structure, and features a high bonding strength between the wear-resistant layer and the outer steel. It can withstand temperature changes and impacts, does not crack or peel off, and can also be repaired locally – the wear-resistant layer can be thickened in areas that are severely worn, thereby **increasing the service life of the flash vaporization buffer device**. The bottom and straight pipe sections can be designed with various options based on the specific conditions at the site. Currently, flash vaporization buffer devices fabricated by surfacing welding are being used in many projects, with a service life of over 2 years, and they are gradually gaining recognition in the market. It has achieved excellent results in Shenhua Ningmei Olefins Company, Shenhua Coal-to-Oil Project, and Inner Mongolia HuiNeng Coal-to-Natural Gas Project.