Can 2205 be used for 20% hydrochloric acid tubes?
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This post was last edited by wayne400 on 2019-5-5 at 16:54. 20% dilute hydrochloric acid is being transported, at room temperature and outdoors. UPVC was used originally, but there were constant leaks at the valve connections; the valves couldn’t be sealed properly. Can all the pipes be replaced with 2205? Are there any other good materials as well? The pipes are relatively small, with a DN20 diameter, and there aren’t many of them either
Consider intergranular corrosion, chloride corrosion, and the like.
For the welding of polypropylene, did you use adhesion previously?
FRP pipes should work fine; they are resistant to acids and aging... :)
Lining, composite, porcelain, enamel, hot-dip coating, replacement with stable chemical elements insoluble in chloride ions, and so on
The hydrochloric acid storage tank in our facility is made of fiberglass, while the pipeline material is polypropylene/fiberglass (PP/FRP), and the performance is quite good.
Using PP hot melt will work. Theoretically, PVC bonding is no problem.
Material 2205 cannot be used. It is recommended to use FRPP or PPH materials, and to connect them by welding. Attention should be paid to the wall thickness of the pipe material; it is advised to use materials with a pressure resistance of 0.6 MPa or higher.