Material selection for 800℃ flue gas pipelines
Thread Content
Dear design experts, I would like to ask: for waste flue gas pipes operating at temperatures over 800°C, what types of materials can be used for such pipes? Also, what brand of valves are recommended? Thank you
The valve body is made of 2520 (310S). If internal leakage is acceptable, a ventilated butterfly valve is chosen for the valve body; this valve body is constructed by welding steel plates, and it does not have sealing rings. There is a retaining ring between the disc and the valve body, resulting in an internal leakage rate of 1%-3%. If zero leakage is required, a three-eccentric structure is used for the valve, with the valve body being cast, though such a valve body is relatively heavy and support needs to be considered when installing it on the pipeline.
With such high temperatures, the first thing to consider is using materials that can withstand high temperatures. For smoke ducts, ventilation butterfly valves are generally used; as long as the material is suitable and can tolerate the required temperature levels, it can be used
Hard-sealed versions also cannot achieve zero leakage; the best they can do is meet level 5 standards!
Composite pipe with tortoiseshell mesh + corundum-based highly wear-resistant lining, capable of withstanding temperatures up to 1500 degrees
This post was last edited by At the foot of Hengshan Slope on 16:48 on 1/9/2018. Incoloy800 is recommended as a material, but such valves are too expensive. It can withstand temperatures over 800 degrees without any problem. Phone numbers are prohibited in the technical area; please use private messages or email if you need to get in touch