Selection of liquid chlorine pipelines and valves
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What material should be used for liquid chlorine pipelines? What model should be selected for the corresponding valve?
Liquid chlorine pipelines are typically made of titanium or high-nickel alloy steels (such as Hastelloy) to ensure corrosion resistance. For valve selection, materials with similar corrosion resistance should also be chosen; fluoroplastic-lined ball valves, diaphragm valves, or valves made of high-nickel alloy steel can be used. The specific model needs to be determined based on the pipe size, pressure rating, and flow requirements. .
For liquid chlorine and chlorine gas in our plant, the design company recommended using seamless steel pipes of size 20 for the pipelines, and special stop valves designed for chlorine gas for the valves.:)
20# seamless steel pipes specified in standard 9948 can be used, along with special stop valves for chlorine
First, it is necessary to establish the quality standards for liquid chlorine usage, in accordance with the GB/T5138-2021 standard for industrial liquid chlorine. We recently installed a new production unit this year; the design uses No. 2 seamless steel pipes, as well as fluorine-lined valves specifically designed for liquid chlorine – and such valves are extremely expensive.
Chlorine valves using pipes and bellows in accordance with GB9948.
For liquid chlorine, Q345E pipes in accordance with GB/T6479 are generally used； The valve selected is a bellows globe valve WJ41W-25C