Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations waross on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Shell vs dish ends thickness of a Pressure Vessel 1

Status
Not open for further replies.

Kaleem1013

Mechanical
Sep 29, 2012
14
We are making a Pressure Vessel of the following specifications

Design Pressure : 3.5 barg
Design Temperature : 85 degC
Diameter (ID) : 900 mm
Length (T/T) : 2000 mm
Capacity : 1000 liters
MOC : SS316L
Head Type : 2:1 Ellipsoidal
Design Code : ASME Sec VIII Div1 Ed. 2010
Corrosion Allowance : 0.0 mm
Shell Thickness : 6 mm

We are forming the dish ends with 6mm sheet, so the final thickness after forming is around 5.3 mm.
So the shell thickness is 6mm, dish ends around 5.3 mm whch will be welded on both sides.

Will this be a deviation from the specifications, or is it negligible.


Please advise.
 
Replies continue below

Recommended for you

You are allowed a thin out on fabrication. If the calculated pressure is there it meets Code. it may not meet specified by the customer and that is between you and the customer.
 
Actually, you are not "allowed" a thin-out tolerance, but when you calculated the nominal thickness, you should have increased it to account for the thin-out.
 
Run the head at 5.3 mm, if it makes, OK, if not, not.

You need to know what "around" really means.

Regards,

Mike
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor