As you have stated, ER 70 S3 are normally manufactured to meet -20 Deg criteria as per standard requirements ASME Sec II C. However if your project requirement calls for -46 Deg C, the filler metal also need to be procured with the filler metal certified to this as a special requirement or if your client accepts all filler wire batches can be tested at external lab. Note that testing at external lab might lose the filler metal manufacturers liability in case of problems. This is in addition to the fact that the PQR has passed the -46 Deg C requirement.
With Regards,
V.Vaidyanathan
Welding Inspection Engineer │ Worley Parsons│Kuwait
( +965 238 61657 │ Fax. +965 2398 1695
www.worleyparsons.com
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of kannayeram gnanapandithan
Sent: Saturday, April 03, 2010 6:29 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:4678] ER70S-3 for low temperature application
Better u Test ER70-S3 with GTAW separately at minus 46 c and u can be sure on this eventhough code does not call
On Sat, Apr 3, 2010 at 12:31 AM, Natarajan Devan <devan1961@gmail.com> wrote:
yes you can apply PQR.
Once proven record is available. i think your PQR is LTC ( A333)material.
regards
N.Devan
On 4/1/10, Muhammed Ibrahim <ibratech@gmail.com> wrote:
Hi members,
Please provide a suggestion for the following query.
I have qualified a PQR for GTAW+SMAW with ER70S-3 & E7018-1. The PQR is impact tested at - 46 deg C at root(GTAW) and filling (SMAW) and passed (Min. 50J energy obtained).
As per ASME Sec.II part C, E7018-1 will support up to - 46 Deg C, but ER70S-3 will support up to - 20 Deg.C only.
Since I have proven the toughness through PQR, can I use this PQR for job with impact test requirement of - 46 Deg C, even ER70S-3 does not support for this temperature as per Sec.IIC?.
Thanks & Regards
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Natarajan.Devan
Senior Welding Inspector
Al Furat Petroleum Co-Syria
Tel: 00963 11 6182103 Res
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