What material should be used for pipes carrying hydrogen chloride?

To be more specific, is it liquid, powder, or granular? What is the transportation temperature of the material? Factors such as pressure are all important; it’s not just one thing

Choose lined enamel pipes if the temperature is not very high

Pipes with PTFE linings can also be used. There are also those made of fiberglass.

It’s a very early post; I was hoping to find any solutions available here. . . . Let’s share our insights. If it’s just hydrogen chloride, then 316L will suffice. If the hydrogen chloride contains a small amount of moisture, at normal temperature and pressure, 316 can be used marginally; however, it’s better to use Hastelloy, such as C267. If the hydrogen chloride contains a large amount of water, along with high pressure and high temperature, 316 will definitely fail – at least C267 should be used; other materials have not been tested in such conditions. If the hydrogen chloride contains a large amount of water as well as free chlorine, then iron-containing pipes will basically fail under high temperatures. If the temperature is above 250°C, at atmospheric pressure, or with only a few kilograms of pressure, Ni-based tubes can be used ； However, if the temperature drops below 250 at this point, ordinary nickel tubes cannot withstand it; tantalum tubes can be used instead. By mastering a few principles, it can be seen that hydrogen chloride itself is not highly corrosive ； Having water present is a problem, as it leads to acid corrosion. However, at temperatures of 250°C or above, 300°C or more, the presence of water isn’t an issue; it does not cause corrosion to stainless steel. The most problematic situation is when there is water present, along with temperatures around 180°C and several dozen kilograms of pressure. If there is free chlorine present, then iron-containing pipes generally cannot withstand it. As for pipes with polymer or ceramic linings, I’m not entirely sure. It is estimated that the joint area will be problematic, and high temperatures will pose difficulties. .

For low-temperature hydrogen chloride, polypropylene pipes (abbreviated as PP) can be used entirely; for high-temperature applications, steel-lined enamel or steel-lined F4 pipes can be considered. However, such pipes have one drawback: it is necessary to first calculate the pipe dimensions, fabricate the pipes with flanges, and then carry out flange connections on site.