Materials for chlorine-containing saline pipelines
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The process for producing lithium chloride using the calcium chloride method involves a chlorinated solution medium; the operating temperature is around 60 degrees, and the pressure is the usual pressure at the pump outlet, namely 0.3 MPa. There are two pumps with a relatively high head, reaching 1.0 MPa. What is a suitable material for pipes in this situation? Currently, steel-reinforced polyethylene composite pipes, FRPP pipes, or steel-lined PO, or steel-lined PTFE are under consideration. However, the specifications state that the operating temperature for steel-reinforced polyethylene composite pipes is up to 70 degrees, which is not suitable for my current manufacturing process; therefore I don’t want to use them. Yet the client prefers this material very much ； FRPP pipes require a short support distance from the pipe rack ； The client believes that steel-lined pipes are inconvenient to install, and suggests using them less often. Moreover, steel-lined PTFE is expensive. From my personal perspective, I still think a steel-lined PTFE option is more suitable for the current manufacturing processes. If any of you have any good suggestions, please share them and let’s discuss together
Of course, steel-lined PTFE is the preferred choice – reliability and safety come first.
A steel lining of F4 is relatively reasonable. The initial investment is a bit high, but it’s a one-time solution.
Which is better, steel-lined PO or steel-lined polytetrafluoroethylene?
At the same temperature and with the same medium, I also have a vacuum filtration section. What material should be used for the vacuum pipes? Those lined with PTFE cannot withstand negative pressures, and will plastic pipes collapse under such conditions?
Lined with PTFE can achieve resistance to negative pressure. Specialized in manufacturing chemical-resistant pipes, valves, and equipment
Won’t the lining fall off over time? This depends on the quality of the manufacturer
This post was last edited by Anti-corrosion Machinery 0 on 2018-3-21 at 16:10. Trust the professionals.
Our chlor-alkali brine also has a temperature of around 60°C, and steel-reinforced PE pipes are used for it; however, the design institute does not recommend their use, yet they are still employed due to their excellent corrosion resistance