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RE: [MW:23108] Post Weld Hydrogen bake out...Post weld baking -P-22

By Materials & Welding
Hello Pradip,
 
As mentioned below by Gerald and Dr. Georgios Dilintas(in another email) , a bake out @ 250-300 Deg C for 1-2 hrs would be advisable. The variables are :-
  • section thickness(25 mm or more)
  • H4 or Non H8 category of welding consumables.
If  welding is done  by GTAW (all through) then bake out may not be required at all or could be very minimal, @ 30 mins max (for mental comfort), to satisfy all  requirements.
 
Thanks.

 
 
Pradip Goswami, P.Eng,IWE
Welding & Metallurgical Engineer/Specialist
Ontario, Canada
pgoswami@quickclic.net
pradip.goswami@gmail.com
 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com]
Sent: Tuesday, June 23, 2015 2:39 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:23104] Post Weld Hydrogen bake out...Post weld baking -P-22

Please refer API Recommended Practice 934-A regarding Post Heating or DeHydrogenation Treatment

Recommended 300degC for min 1Hour.

Copy not available with me.
 
Thanks & Regards
J.Gerald Jayakumar
0091-9344954677

From: pradip kumar Sil <pradipsil@gmail.com>
To: materials-welding <materials-welding@googlegroups.com>
Sent: Tuesday, June 23, 2015 9:57 AM
Subject: [MW:23103] Post Weld Hydrogen bake out...Post weld baking -P-22

Dear All,
Post weld hydrogen bake out ( Post weld baking ) is aplicable for ASTM 335 GR. P-22 material.There is any applicable standard.
Regards
Pradip
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