What kind of pipeline is suitable for use in high-temperature environments with corrosive gases?
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A pipeline made of 98% sulfuric acid is connected to a high-temperature furnace, where the sulfuric acid is used in chemical reactions within the furnace. The temperature inside the furnace is around 500 degrees, and there is also the risk of corrosion caused by hydrogen chloride gas. Please discuss what material would be suitable for use in this sulfuric acid pipeline. Let’s discuss this together; those who give good answers will receive **points as a reward.
It is better to use Inconel 625 tubing, but it is relatively expensive.
Regarding the Inconel 625 pipes mentioned by the friend on the 2nd floor, are there pipes of DN25 available? What is roughly the price for them?
Inconel625 material is available in various specifications; please consult domestic and international import agents for details.
The friend upstairs is wrong; the pipes you mentioned are not capable of withstanding high temperatures at all – they can handle at most a little over 100 degrees
Try the steel-reinforced PVC pipes – they’re new, and they should work fine, but they are a bit expensive
INCONEL625 has good high-temperature resistance, while Hastelloy has excellent corrosion resistance
This post was last edited by yunsanapo on 2013-4-2 09:17. The key elements are high-temperature concentrated sulfuric acid and high-temperature hydrogen chloride gas; for pipes like these, only high-purity silicon carbide can solve the problem. With current technology, silicon carbide pipes of up to 4 meters in length can be manufactured! Alternatively, coating Hastelloy X with a silicide layer can also provide a long service life; it is also relatively easy to process. If metal linings are to be used, gold or platinum lining must be chosen, as other common metal materials cannot withstand HCl gas at temperatures above 540 degrees, nor can they tolerate boiling hot concentrated sulfuric acid! Gold can withstand temperatures of up to 870 degrees in high-temperature HCL, while platinum can tolerate temperatures of up to 1200 degrees