Re: [MW:21290] QW-452.3 GROOVE-WELD DIAMETER LIMITS

Dear Rajesh,

Hope this will help.

The following interpretation of ASME Section IX applies to Set-through and Set-on nozzle installation:
Interpretation: IX-80-67
Subject: Section IX, Nozzle to Shell Connections
Date Issued: December 8, 1980
File: BC-80-675
Question: When nozzle or branch connections are attached to the wall or head of a pressure vessel, what are the basic criteria establishing procedure and performance qualification requirements, assuming impact test is not a requirement?

Reply: Where the nozzle is attached to the vessel by welding completely through the thickness of the vessel wall, the procedure shall be qualified for the thickness of the vessel wall penetrated by the nozzle or attachment. Where additional metal is placed on either the interior or exterior of the vessel wall in the form of fillet welds, they shall be considered as having been qualified by the procedure qualification covering the thickness of the vessel wall. Performance qualification for this weldment may be made in plate to cover the appropriate thickness of the vessel wall and the position in which the weld is being made. Diameter is not a factor.

Where the nozzle or attachment is welded to the vessel wall by welding through the thickness of the nozzle or attachment, the procedure qualification shall be made for the thickness of the nozzle or attachment wall at the time of welding. Performance qualification for this condition shall be made with the appropriate diameter pipe as required by QW-452.3, with the range of thickness of weld metal qualified determined by the thickness of the nozzle or attachment wall at the time of welding. Any fillet welds, both procedure and performance, will have been qualified when qualifying for the full penetration welds involved.

Note: The above interpretation refers to nozzle attachment to vessels, however the criteria apply to branch attachments topressure piping as well.

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On Sat, 6/28/14, rajesh s. mhaske ,Engineer Welding ,PUNE,INDIA <rajesh.mhaske17@gmail.com> wrote:

Subject: Re: [MW:21289] QW-452.3 GROOVE-WELD DIAMETER LIMITS
To: materials-welding@googlegroups.com
Date: Saturday, June 28, 2014, 12:50 PM

   Dear sir
              
Any reference document for below statement/ case study/Asme
interpatation copy . I have to give it to third party
inspector.
Now we are doing same but don't have document for
reference

On Saturday, June 28, 2014 11:45:12 AM UTC+5:30, veera
raghava kommisetti wrote:Set-on Type -
Not qualified.Set-In Type -
Qualified.

On Fri, Jun 27, 2014 at
11:35 AM, rajesh s. mhaske ,Engineer Welding ,PUNE,INDIA
<rajesh....@gmail.com> wrote:


Dear sir
          
Pipe dia : 323.*33 mm thk
          
Tube dia : 50.8 *6.35 mm thk
          
Groove design for  above pipe to tube welding  :
set in (groove on header )  / set on (groove on
tube  )

          
Welding process : GTAW + FCAW

          
Qualification of welder: OD >73 mm and Thk - Max to be
welded with process GTAW+FCAW
          

Question :
           
1) Can above qualified welder be deployed for welding of set
in and set on joint.

           





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