Y-Strainers

[Yash Patel]

Hello,
My requirement for Y-strainer is CS SW 800# but the supplier is offering CS SW CL600. What is the difference? I think CL600 is only used if you want it flanged end and 800# API is used for NPT and SW. Am I right?

 

[LittleInch]

See this and scroll down a bit to see the class 800 stuff

http://www.eng-tips.com/viewthread.cfm?qid=358510

Class 800 is not a tabulated ASME designation but is widely used apparently for SW and thread end valves and apparently defined in API 602.

It is somewhere between class 600 and 900 so a class 600 item will have a lower pressure rating than a class 800 one. If all you need is a class 600 rating (100 bar at ambient temps) then you'll be ok.

Remember - More details = better answers
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[Yash Patel]

The line design pressure is 50psig. Class 600 rating should work, right??

 

[LittleInch]

Yes. CWP for class 600 is 1450 psig

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[Yash Patel]

thanks

 

[mk3223]

I am curious that why CL600 was specified for the SW part. I suppose that the SW Y-strainer can be made per CL600 pressure rating, i.e. 1450 psig, but why not just 800 psig?