Sites: GlobalSpec.com | GlobalSpec Electronics | CR4 | Electronics360
Login | Register
The Engineer's Place for News and Discussion®

Previous in Forum: Are Rotational Molds Movable From Shop To Shop?   Next in Forum: Calculation of Overhead Costs for Lathe Machine
Close

Comments Format:






Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







5 comments
Participant

Join Date: May 2013
Posts: 3

Diameter of Skirt for Hemispherical Head

05/10/2013 12:47 AM

Dears

Can somebody tell me is there any standard to decide diameter of skirt support where the type of head is Hemisperical one??

Also please tell me when Y-ring option is selected instead of skirt welded directly to hemispherical head??

Register to Reply
Pathfinder Tags: Hemispherical Head
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Ketchikan, AK, USA
Posts: 14976
Good Answers: 564
#1

Re: Daimeter of Skirt for hemispherical head

05/10/2013 3:42 AM

I don't think there is a standard for this; you may design it at your own option, so long as it meets strength requirements.

__________________
In vino veritas; in cervisia carmen; in aqua E. coli.
Register to Reply
Participant

Join Date: May 2013
Posts: 3
#3
In reply to #1

Re: Daimeter of Skirt for hemispherical head

05/10/2013 4:17 AM

Thanks!!. However In my opinion mean diameter of hemispherical head shoud match with mean dia of skirt support if there is a sufficient clear gap between butt weld joint of shell to head and skirt support to head.Correct me if I am wrong.

Your reply that "there is no standard applicable" is valid also for selection of forged Y-ring?? OR Y-ring should be selected in certain cases like creep temp. range etc.

And if one decide to go for Y-ring then how to decide the dimensions of this Y-ring??

Is there any standard of any PMC available?? OR is there any standard procedure to dimention Y-ring??

Register to Reply
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain - possibly to become "South Scotland" or "Non-Caledonia" from September 2016. Kettle's on.
Posts: 22390
Good Answers: 563
#2

Re: Daimeter of Skirt for hemispherical head

05/10/2013 4:07 AM
__________________
The recent explosion of personal telephony across the globe seems to have gone hand-in-hand with a profound reluctance to actually use the damn things for the purpose for which they have been designed.
Register to Reply
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Ketchikan, AK, USA
Posts: 14976
Good Answers: 564
#5
In reply to #2

Re: Daimeter of Skirt for hemispherical head

05/12/2013 7:51 PM

I have seen vessel skirts anywhere from o.d. = shell o.d. down to stanchions of pipe. I think you are right to mention the distance between head-to-shell and head-to-skirt joints.

I am not familiar with the Y-ring terminology, and again I don't know of any standards for it. However, seismic considerations (e.g., overturning moment) may apply.

__________________
In vino veritas; in cervisia carmen; in aqua E. coli.
Register to Reply
Associate

Join Date: Dec 2010
Location: Australia
Posts: 47
Good Answers: 5
#4

Re: Diameter of Skirt for Hemispherical Head

05/12/2013 6:48 PM

Most times the skirt goes around the waist .. or the ankles if you're really lucky..not the Hemishperical head...

__________________
Have you tried turning it off and on?
Register to Reply Off Topic (Score 5)
Register to Reply 5 comments
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Copy to Clipboard

Users who posted comments:

bht2010 (1); PVnilesh (1); PWSlack (1); Tornado (2)

Previous in Forum: Are Rotational Molds Movable From Shop To Shop?   Next in Forum: Calculation of Overhead Costs for Lathe Machine