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Re: [MW:22802] Non conform ferrite on Duplex UNS31083

By Materials & Welding

less resistance to chlorine stress corrosion cracking

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


Pedro JUNIOR ---03/02/2015 11:59:15---Dear experts, Ferrite content has been measured (24 to 29% measured in weld metal) below project req

From: Pedro JUNIOR <pedro.junior@total.com>
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Date: 03/02/2015 11:59
Subject: [MW:22800] Non conform ferrite on Duplex UNS31083
Sent by: materials-welding@googlegroups.com




Dear experts,
 
Ferrite content has been measured (24 to 29% measured in weld metal) below project requirements (30 to 55%). Counter tests demonstrated same values.
 
Most of our contractor's WPQRs are qualified with GTAW+SMAW processes for thicknesses over 14 mm.
In order to comply with their general practices, contractor decided to order duplex SMAW filler metal
After review of feedback of the contractor on ferrite content, it appears that ferrite % is quite low in general with SMAW. This feedback has not been clearly figured out on WPQR reports and production welds do not comply with our requirements (client requirements).
Welding monitoring have been done properly. General quality of the weld is good. The concern comes from the filler metal itself.
 
In case of acceptance.
 
è Which are the risk of accepting Ferrite Content below the minimal required for duplex?
 
Best Regards
 

Pedro JUNIOR
QC Piping Inspector
TOTAL E&P ANGOLA
DT/EPT/MHSAQ/QAQC
Tel : +244 222 67 2097
Cell:+244 912 641 681
Email: pedro.junior@total.com		  
Mailing Address:
TOTAL E&P Angola
Rua 6 IL 6 B.I SONILS, Boavista Luanda
B.I- 100-Office 011
Luanda - Angola
 
                                                 
 
 

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