Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here





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?

RE: Y-Strainers

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


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
Also: If you get a response it's polite to respond to it.

RE: Y-Strainers

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

RE: Y-Strainers

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.

RE: Y-Strainers


RE: Y-Strainers

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?

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close