Governing Thickness for PWHT(B31.1&31.3)

Mohd Siraj

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Sep 21, 2015, 12:19:59 PM9/21/15

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What is governing thickness for PWHT is it weldmetal being welded or thicker component being welded?

ASME B31.3

331.1.3 Governing Thickness. When components are joined by welding, the thickness to be used in applying the heat treatment provisions of Table 331.1.1 shall be that of the thicker component measured at the joint.

Q-1 : If i have one joint dissimilar butt joint between P1 # 20mm thk and 45mm thk and weld metal thickness is 20mm (40mm portion is made tapper).

Still i hve to do PWHT for this joints as per 45mm.??

(i know as per B31.3 if preheat is applied 95C pwht not req,but what in case of service requirement is PWHT.)

ASME B31.1

132.4.1 The term nominal thickness as used in

Table 132 and Notes is the lesser thickness of (A) or (B)

as follows:

(A) the thickness of the weld

(B) the thicker of the materials being joined at the

weld

Same things applicable as per B31.1 ??

george....@gr.bureauveritas.com

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Sep 22, 2015, 6:24:36 AM9/22/15

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For one more time I recommend to read all the relevant chapter of the Code and not isolated paragraphs.
So I would like to draw your attention also to the following paragraphs
132.1.2
132.2 (B)
and to 132.4.2

best regards

Dr. Georgios Dilintas

Authorized Nuclear Inspector
Authorized Inspector Supervisor

I&F REGIONAL TECHNICAL MANAGER
BUREAU VERITAS PIRAEUS - GREECE

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Karunakaran Karan

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Sep 22, 2015, 10:26:31 AM9/22/15

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Dear Gents,
What is the minimum thickness for PWHT in revision 2014.
Pl.guide me.
Thank you
karunakaran

On 9/22/15, george....@gr.bureauveritas.com

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george....@gr.bureauveritas.com

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Sep 22, 2015, 11:45:57 AM9/22/15

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What is the jointed materials Pnos?

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Hafiz Ali Alvi

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Sep 22, 2015, 11:18:07 PM9/22/15

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Q-1 yes PWHT is applicable for joint between 45mm and 20mm. See interpretation of B31.3

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Karunakaran Karan

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Sep 23, 2015, 5:25:57 AM9/23/15

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Hello,
P1 GI to P1GI AND PIG1 TO PIG2
Thnk you

Thank you

On 9/22/15, george....@gr.bureauveritas.com
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george....@gr.bureauveritas.com

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Sep 23, 2015, 1:31:33 PM9/23/15

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I case the applicable Code Section is B31.1:
No PWHT if T as defined in 132.4.1 is < 19.00 mm
No PWHT if T as defined in 132.4.1 is < 25.00 mm and preheat of 95 degC min is applied
No PWHT if T as define in 132.4.1 is between 19 mm and 38 mm (Included) and CE < 0,50 and min preheat 121 degC and max deposited thickness per pass 6 mm

best regards

Dr. Georgios Dilintas

Authorized Nuclear Inspector
Authorized Inspector Supervisor

I&F REGIONAL TECHNICAL MANAGER
BUREAU VERITAS PIRAEUS - GREECE

Tel: +30 210 40 63 113 /4 /5
Fax: +30 210 40 63 118
Cell: +30 69 44 64 62 04

Karunakaran Karan ---23/09/2015 12:26:02---Hello, P1 GI to P1GI AND PIG1 TO PIG2

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george....@gr.bureauveritas.com

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Sep 23, 2015, 1:31:33 PM9/23/15

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In case the applicable Code Section is B31.3
No PWHT for all thickness below or equal to 20 mm (2006 edition)

best regards

Dr. Georgios Dilintas

Authorized Nuclear Inspector
Authorized Inspector Supervisor

I&F REGIONAL TECHNICAL MANAGER
BUREAU VERITAS PIRAEUS - GREECE

Tel: +30 210 40 63 113 /4 /5
Fax: +30 210 40 63 118
Cell: +30 69 44 64 62 04

Karunakaran Karan ---23/09/2015 12:26:02---Hello, P1 GI to P1GI AND PIG1 TO PIG2

From: Karunakaran Karan <karu...@gmail.com>
To: material...@googlegroups.com
Date: 23/09/2015 12:26
Subject: Re: [MW:23512] Governing Thickness for PWHT(B31.1&31.3)
Sent by: material...@googlegroups.com

> -- *S.KARUNAKARAN* karu...@gmail.com

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