I need advice on what material is suitable for the acid addition pipeline in electrolyzers
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This post was last edited by sunjl1981 on 2013-1-6 at 22:27. What material is best for the pipes used to add acid to electrolyzers? We are currently using PVC/fiberglass, but leaks still occur frequently. I would appreciate some advice from those with more experience. # + +
The pipes we use now are also made of PVC/FRP, and leaks do occur, but there are no issues with PVC welding. As for fiberglass, it generally doesn’t leak if bonded properly
This post was last edited by huawei on 2011-6-15 at 10:15. Steel lined with rubber is the best option; however, the rubber used must have a low calcium and magnesium content. In our facility, all the electrochemical cells are lined with steel and rubber, and there have been no leaks. If it’s made of PVC, glass fiber cloth can be wrapped around the pipe and anti-corrosion resin applied; the cost is lower than that of external coatings. This is how we treat our pipes
This post was last edited by huawei on 2011-6-15 10:17. We have been using CPVC at our company, the type that is bonded with glue, and it works very well!
Most of the hydrochloric acid pipelines used in our company are currently made of PVC/fiberglass; could it be a problem with your construction quality? The pressure isn’t very high either
Composite non-metallic material pipes have a high coefficient of thermal expansion, as well as stress concentration. Therefore, it is essential to maintain high quality standards during pipeline construction; elbows, supports, brackets, and expansion joints are all necessary, and even higher requirements apply to the welding quality of the PVC layer. Additionally, the material choice for the PVC layer is also very important; high-quality chemical industry pipes should be used, those that do not contain calcium or magnesium fillers.
Our unit originally used PVC/FRP; due to insufficient strength, the pipes sagged severely over time inside the pipe racks. Although there were no leaks, it was still a frightening sight! Later, all pipes were replaced with steel-lined PTFE pipes.
Reply to 7# tclvjian: Using steel-lined PTFE for everything? You must be rich! Other pipes can also handle it.
It is recommended to replace the steel lining at once with low-calcium-magnesium rubber, which is pressure-resistant, acid and alkali resistant, and has a low content of calcium and magnesium ions. High rigidity and toughness. Long service life. Generally, design institutes require low-calcium-magnesium pipe linings for the process pipes in secondary brine systems. Jiangsu Kaiyuan specializes in the production of rubber-lined equipment and rubber-lined pipes. QQ: 302552097 Phone: 15952621881
Our acid pipes are lined with PO steel, and so far there have been no problems.
How about using CPVC? Has anyone else used it?