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TOPIC: Intrument Air Line SS or CS

5 years 5 months ago #8445

  • LSG
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Gents,

What is your take on the I/A line to be SS or CS? I have done projects where they have used both types of material.

Re: Intrument Air Line SS or CS 5 years 3 months ago #7112

  • 11echo
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Like you I have used both, but my experience because stainless steel is expensive, plus is a "pain" to thread, everyone normally uses carbon steel that is hot dipped galvanized and threaded, it is cheaper/easier way to go in industrial use. Pharmaceutical use is different, in clean room environments, stainless is preferred.

Re: Intrument Air Line SS or CS 5 years 3 months ago #7113

  • Jop
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I agree with all of 11echo's comments but would add the following.
I recommend the use of SS if the prevailing atmosphere (enclosed or outdoor) is highly corrosive i.e.: Chlorine, etc.
Do it once and Do it Right

Re: Intrument Air Line SS or CS 5 years 3 months ago #7119

  • 11echo
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I'd like to make a clarification to JOP's comment, I agree with him in general but you have to be careful with chlorides and stainless steel. Trying to use common 316/316L in or around chlorine can lead to "chloride stress cracking", so be sure you're following an approved piping material spec(by a material engineer) for the commodity that is being piped up or exposed to.
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