Previous in Forum: Multi Split Air-Conditioning System   Next in Forum: Exhaust Blower Sizing for Small Fume Hood
Close

Comments Format:






Change Mode
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:







Add Vote
7 comments
Rate Comments: Nested
wijeesh
Associate
Engineering Fields - Mechanical Engineering - New Member

Join Date: Apr 2008
Location: India
Posts: 25

Min Distance Between Shell Weld Seam and Nozzle

08/12/2011 3:05 AM

Hello Can anybody suggest the minimum required distance between longitudinal/circum weld seam and nozzle. Is there any requirement in ASME codes Div 1 or 2. As per shell standards, it is 50mm or 2t whichever is greater. But confused with the value of 't' whether it is the thickness of shell or nozzle.
Here im attaching my drawing Regards Vijeesh

__________________
 vgsh
Register to Reply
Pathfinder Tags: Min distance between Shell weld seam and Nozzle
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Good Answers:

These comments received enough positive votes to make them "good answers".
Tornado
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 21017
Good Answers: 795
#1

Re: Min distance between Shell weld seam and Nozzle

08/12/2011 3:39 AM

In this instance, t = shell thickness.

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

Join Date: Jan 2010
Location: Mineral wells Tx
Posts: 630
Good Answers: 34
#2

Re: Min distance between Shell weld seam and Nozzle

08/12/2011 3:59 AM

ASME does not include requirements for distance between welds. Longuitudinal welding must be x-rayed prior to welding the connection (Nozzel). Beware the thickness, the material and the service, you may require PWHT.
Register to Reply
wijeesh
Associate
Engineering Fields - Mechanical Engineering - New Member

Join Date: Apr 2008
Location: India
Posts: 25
#3
In reply to #2

Re: Min distance between Shell weld seam and Nozzle

08/12/2011 5:54 AM

Thanks for your reply..

Yes the current vessel is as per ASME Div 2 & required PWHT.

Regards

Vijeesh

__________________
 vgsh
Register to Reply Off Topic (Score 4)
Mukesh0861
Power-User

Join Date: Dec 2010
Posts: 377
Good Answers: 20
#4

Re: Min distance between Shell weld seam and Nozzle

08/12/2011 6:41 AM

This distance is important in view of future repair of the weld seam if required, in that case gap of 2t, (twice thickness of shell plate) is neccessary.
Register to Reply
2
Abdel Halim Galala
Guru
Engineering Fields - Piping Design Engineering - New Member Egypt - Member - Member since 02/18/2007

Join Date: Feb 2007
Location: Cairo, Egypt
Posts: 1733
Good Answers: 248
#5

Re: Min Distance Between Shell Weld Seam and Nozzle

08/13/2011 12:59 AM

See my post #3 of CR4 Thread: Minimum distance between welds.

__________________
 It is better to be defeated on principles, than to win on lies!
Register to Reply Good Answer (Score 2)
No more Good Answers.
prdp2344
Commentator

Join Date: Aug 2011
Location: India
Posts: 59
Good Answers: 11
#6
In reply to #5

Re: Min Distance Between Shell Weld Seam and Nozzle

08/13/2011 6:06 AM

GA for your cmments in 2007.

__________________
 When there is smoke, there must be fire.
Register to Reply
mahesh_4754
Associate

Join Date: Oct 2008
Location: mumbai, maharashtra, india
Posts: 45
Good Answers: 3
#7
In reply to #5

Re: Min Distance Between Shell Weld Seam and Nozzle

08/14/2011 11:35 AM

Dear Halim, That was a perfect shot. Can you pl. share your experience with us: why 2.5t and not 2.0t in this case, as 2.0t is the normal industry practice? regards
Register to Reply
Register to Reply
Have a Different Question?
7 comments

Good Answers:

These comments received enough positive votes to make them "good answers".
Copy to Clipboard

Users who posted comments:

Abdel Halim Galala (1); mahesh_4754 (1); Mukesh0861 (1); prdp2344 (1); Tornado (1); Whitephone (1); wijeesh (1)

Previous in Forum: Multi Split Air-Conditioning System   Next in Forum: Exhaust Blower Sizing for Small Fume Hood

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Mechanical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (64 right now)
Show Members
Advertisement