Re: [MW:28546] Branch PWHT - Control Thickness

In (2)also the branch joint with mother pipe is a pressure joint and the pad is a non pressure part. 

So can the joint between mother and branch pipe be considered for PWHT thickness? 

Is there any interpretations available. 

Regards, 

Hareesh K V

8547859202

On Thu, Nov 1, 2018, 9:24 AM rajesh kaswala <rajeshkasvala@gmail.com> wrote:

consider 1  because specify branch connection ,

 no. 2 just for pressure & non pressure part joint eg. support 

regard

rajesh

On Wed, Oct 31, 2018 at 7:36 AM Hareesh K V <hareesh13h@gmail.com> wrote:

Dear Sir,

Situation: 

Welding of pipe branch connection with RF pad.

Header size: 20mm; Thickness of RF Pad: 20mm

Branch pipe thickness: 10.97mm

Whether PWHT is required for the branch connection?

As per ASME B 31.3, Clause 331.1.3 (a), the PWHT control thickness is the lesser of the below two conditions,

(1) the thickness of the weld [ As per clause 331.1.3 (b) (5) the control thickness of branch can be calculated.]

(2) the thickness of the materials being joined at the weld or the thickness of the pressure-containing material if the weld is attaching a nonpressure containing material to a pressure-containing material.

Here can i consider (2) as 20mm as that is the thickness of the material being used in this situation and consider the same as the control thickness for PWHT?

Regards,

Hareesh K V

+91-8547859202

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Hareesh K V
+91-9447625012

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