Material selection for chlorine-specific pipelines
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Previously, the company used Q235B pipes for its chlorine pipelines; it plans to manufacture a vaporizer in which the tank needs to be immersed in hot water at around 80 degrees Celsius, and therefore Q345E pipes are intended to be used for these pipelines. Some people say to use grade 20 steel or grade 10 steel, while others suggest using material 7169 (I’ve never heard of it). I searched for 7169 online but couldn’t find any information on it :o. Can experienced peers share their usage experiences?
Why isn’t anyone responding? It’s urgent. . . . . .
4169, I guess. 4169 is a nickel-based alloy
We designed it; we chose Q345E
We used Q345E, and after two years there was no sign of corrosion!
Q345E is generally used, but ordinary carbon steel pipes are also employed; ordinary carbon steel pipes need to be replaced frequently
This material does not meet the current specification requirements
Seeking advice. Which standard does this source come from?
In GB 20801, Q345E is only used in low-temperature conditions.