[MW:3063] Re: Distortion limit for ASME Section 8 Vessels

Dia of the Vessel- 2m

Shell, Head thickness-6mm

Design Pressure-Atmospheric pressure.

 

Regards

Prabhakar. S

On Fri, Aug 28, 2009 at 1:23 PM, Arunachalam A <arunvani@gmail.com> wrote:

Code ASME Section VIII Div 1 talks the following tolerances:

 

1. shell/head ovality. as per UG 80/81

2. Fit up tolerances as per UW33

3. Weld reinforcement tolerances as per UW 35.

 

You need to assess the acceptance of tank/vessel based on the above tolerances.

 

Please give the design parameters of the vessel ( shell dia/thick/internal pressure/external pressure  etc). in order to assess the vessel

 

arun

 

On Fri, Aug 28, 2009 at 11:12 AM, prabhakar s <prabhakars84@gmail.com> wrote:

Hi,

 

 

We have procured a Stainless Steel tank from one of our sub contrators. The thickness of the plate is 6mm. They have done hydrotest also. The tank is shifted to our Project site from the Sub contractors yard. We observed a distortion of 3mm near a Longitudinal seam (Both side of the weld seam).

 

I would like to know the allowable tolerance limit for distortion. Is 3mm acceptable? If it is so please give me the code reference.

 

We observed  a Grinding mark of 0.5 mm depth on 6mm thick Shell. what is the allowable limit for this? Is there any code reference?

 

Your early response in this regard will be highly appreciated.

 

 

Regards

Prabhakar. S

 

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