×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Jobs

Threaded Reducing Tee available in CLASS 3000?
4

Threaded Reducing Tee available in CLASS 3000?

Threaded Reducing Tee available in CLASS 3000?

(OP)
I am looking for an NPS 1-1/4" x NPS 1/2" threaded reducing tee avaible in Class 3000? I know that they are available in class 125, 150, 300, etc. (as per Anvil International catalogue), but I haven't found one in Class 3000. Do they exist?

I also ask because they are not listed within the ASME B16.11 spec. If they do in fact exist, in what spec are they found?

RE: Threaded Reducing Tee available in CLASS 3000?

B16.11 doesn't specifically list any reducing tees or crosses, as far as I'm aware. It just gives a general rule for dimensions of fittings in section 6.5 (the largest size connection is the driving dimension for each branch).

So that should be available as a fitting, but I would contact your fitting vendor. It's a bit of an odd size combination, but not so weird you shouldn't be able to track one down. Given that you're dealing with threaded piping, it might be easier / cheaper to swage up and go to an 1-1/2" x 1/2" reducing tee for that connection. You could also use a bushing, if that's allowable in your particular piping system.

RE: Threaded Reducing Tee available in CLASS 3000?

Have you checked MSS SP-114? Not sure if that standard covers your scope, but its worth a shot.

RE: Threaded Reducing Tee available in CLASS 3000?

2
Threaded reducing tees are available in class 3000# in carbon and stainless steel. By that I mean you can buy them, or more properly, I have bought them and they exist on my shop storage shelf.

Socket weld by threaded (threaded branch) reducing tees do not exist, but can be made from the threaded reducing tees.

Are you likely to find one with any dimension being 1 1/4" NPS? Doubtful. Most people avoid 1 1/4" NPS as an oddball size. So it may exist in theory, or in a table, but it'll be (almost) as rare as 3.5" NPS pipe. I've never seen a piece of that in my 25+ yrs slingin' pipe.

RE: Threaded Reducing Tee available in CLASS 3000?

(OP)
Guys, appreciate all the feedback!

We were actually able to order a NPS 1-1/4 x NPS 1-1/4 x NPS 1/2 threaded (FPT) Class 3000 Tee. I guess that even though the B16.11 spec doesn't specifically layout a table of options for threaded reducing tees, Sections 3.2 and 6.5 suggest that it is possible.

Also, I recently needed an NPS 3/4 x NPS 3/4 x NPS 1/2, SW x SW x Threaded Class 3000 Tee. To do so, the vendor took a 3/4 x 3/4 x solid branch tee, and then drilled and tapped the branch to 1/2". I find it interesting that the world of fittings is larger than what the specs tell us (still have to use engineering judgement of course!).

Thanks for your help on this guys.

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!


Resources