[MW:5383] FW: 5353] PWHT requirement as per EN 13480

 

Rahul,

 

I have attached the extract from EN-13840-4,on PWHT with the explanatory notes.  EN  specifications though brief, are very systematic. If you look at the notes and highlighted areas, it explains the minimum thickness requirement for PWHT, including holding time and temperature.

 

Let me know if it works for you.

 

Thanks.

 

Pradip Goswami,P.Eng.

Welding & Metallurgical Engineer/Specialist

Ontario Power Generation Inc.

Email-pgoswami@sympatico.ca,

pgoswami@quickclic.net

 

 

 

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Subject: [MW:5353] PWHT requirement as per EN 13480
Date: Wed, 2 Jun 2010 14:13:10 +0200
From: Rahul.Pisat@akzonobel.com
To: materials-welding@googlegroups.com

Hello All,
In EN 13480, part 4, PWHT requirement for all material group is defined as per Table 9.14.1-1  & 9.141-2.
As per this table there is no minimum thickness requirement defined for PWHT requirement. In these table PWHT parameters, i.e. Temperature & Holding time , are defined for Controlling thickness above 0 mm.
  ( unlike, ASME B31.3 ,where we need to have a PWHT for carbon steel material above 19 mm & for CrMo steel with thickness 13 mm & above ).
But in related para. 9.14.1,  NOTE -1 states that, PWHT may be required on steels with lower thickness than specified in these table.
Can anybody explain me where , in EN 13480,   I can find the minimum thickness of a particular material which does not require PWHT ?


Kind regards
Rahul

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