Please tell me what pipe material is used for 30% sodium chloride solution?
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Please tell me what pipe material is used for 30% sodium chloride solution?
No. 20 steel pipe will do. The calcium chloride cooling brine we use is No. 20 steel pipe.
This post was last edited by Dugu Lingyun on 2019-12-19 21:45. If the temperature is not high, choose 2205 dual-phase steel below 50℃, use carbon steel lined plastic pipes below 100℃, and use 2507 above 100℃. Of course, titanium pipes are no problem.
The specific material to choose is also related to the design temperature. For 30% caustic soda solution, No. 20 carbon steel can be used when the design temperature is below 50 degrees. For 50 to 90 degrees, No. 20 carbon steel can be selected and the welds should be stress-relieved and heat treated. The valve internals should be made of nickel-based alloys. The valves can also be lined with carbon steel and FEP. After exceeding 90 degrees, the pipes should be made of nickel-based alloys.
Is your temperature very low? Below 25℃, right?
What is the temperature and pressure? Normal temperature and low pressure. Plastic pipes are fine.
This depends on the operating temperature first, otherwise it will cause damage to the pipe. Carbon steel can be used at room temperature.