Weldolet Branch vs Header Schedule 1

[GasGuy]

If the branch and header are different schedules are the following weldolets ok;
Std WT header, XS branch - buy XS weldolet
XS header, Std WT branch - buy XS weldolet (will have step down to branch pipe WT). If step unacceptable for flow reasons, request weldolet bore be machined down to match Std Wt branch.

Bonney Forge state "where the schedule of the run is greater or less than the schedule of the branch, it is essential that both schedules be specified". Can't you just order the heaviest wall of branch/header if steps on some branch connections are ok?

 

[BigInch]

If you have the step down, it should be no problem as the step down allows welding to both end wt. I would use the step down rather than making someone machine a weldolet.

Its a polite way for Bonney to say that they are just trying to avoid doing your job. You ('re your company) is responsible for the design, not them, right?

 

[GasGuy]

I have a photo of a bonney forge weldolet with the following stamped on it;
6" x 12"
SCH100 (header) x SCH 160 (branch)

I gather this is just a standard SCH160 weldolet with a special stamp on it. What's the point of that? The weldolet won't change dimensionally for a SCH100 header will it (if using a SCH160 weldolet)?

 

[Yorkman]

Can't say as I've ever heard of a sch. 100?

I'm not a real engineer, but I play one on T.V.
A.J. Gest, York Int./JCI

 

[Yorkman]

I stand corrected, thread378-158954 has a listing of available pipe schedules and starting at 10", sch 100 is listed! One more thing I've learned today.

I'm not a real engineer, but I play one on T.V.
A.J. Gest, York Int./JCI

 

[abba7114]

Can some one tell why sockolets and thredolets are described with #ratings while olets are rated in schedules.
Thanks in anticipation of your answer

 

[cadnutcase]

Abba,

Simply put,

Schedules refer to the wall thickness of the pipe and which in turn refer to the I.D. of the pipe.

Threadolets and Sockolets engage the outside of the pipe and is why there are not typically refered to with schedules. The O.D. of the pipe never changes.

I can't find a link that tells where to draw the line on 2000#, 3000# and 6000# or MI fittings. See link for pic.

http://www.bonneyforge.com/specs/branch/thredolet.cfm

Weldolets are a little diffent. Imagine welding a pipe square to a plate. You wouldn't drill the whole in the plate equal to the O.D., you would drill it the I.D.
Just like butt welding tee's or ells up to a pipe.

Picture is a little small but look here.

http://www.bonneyforge.com/specs/branch/weldolet_szonsz.cfm

Yorkman,
On a side note, your company and mine are competitors.

Cadnutcase
TAS

 

[ytse]

Threadolets and sockolets are for small bore socketweld or threaded branch pipes and the # rating is to match B16.11 standard for forged socket weld and threaded fittings.

Weldolets are for butt welded pipe branches to match pipe schedules per B36.10M