CS material, E70S2- Welder qualified , can he weld SS 316 material & Duplex, Super duplex material with E70s2 qualification ? or he should be qualified by separate SS 316 & Duplex ,SDSS material ?

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Madheswaran s

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Jul 29, 2022, 2:13:04 AM7/29/22
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Dear Experts,

CS material, E70S2- Welder qualified , can he weld SS 316 material & Duplex, Super duplex material with already  he has E70s2 qualification ? or he should be qualified by separately for SS 316 & Duplex ,SDSS material ?



Thanks,
Madheswarn.S

pgos...@rogers.com

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Jul 29, 2022, 8:55:41 AM7/29/22
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Hi,

The welder is not qualified to weld SS 316 or DSS or SDSS. Though the F No for consumables remain to be the same , the P No gets changed. Hence welder will require new qualification.

 

Thanks.

 

Pradip Goswami.P.Eng, IWE.

Independent Welding & Metallurgical Engineering Specialist

Saudi Aramco Approved Designated Project Welding Engineer (DPWR)

Qatar Petroleum Approved, SME-Materials & Corrosion Engineering.

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maheshQAQC

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Jul 30, 2022, 10:00:02 AM7/30/22
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Hi Sir,
As per QW-423 welder does not required re qualification and he can weld as per table mentioned material. pls correct me if i misinterpret the table. 

thanks
Mahesh
QW-423.png

M.Sathiya Narayanan

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Jul 30, 2022, 10:00:14 AM7/30/22
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Check the filler no of both welding consumble if both are same we can use it, 

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srinivas rao

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Jul 30, 2022, 10:01:21 AM7/30/22
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Dear Madheswaran ,

As general understanding of code  ,If the Essential variables of CS qualified by the welder are not changes, then the welder is allowed to weld SS material as permitted by the ASME SEC IX , QW-423, There is only one major change in SS welding is back purging(backing). A welder qualified without backing, can weld with backing as per ASME sec IX this is only limited to GTAW process/the process where essential variables are not changed

So a welder qualified in CS without purging can weld SS with purging. But one has to consider other variables like are this welder cable to do welding in case of purging, is he aware of welding variable, other welding requirements to be followed for material mainly inter pass, travel speeds.

Considering the base material chemistry , metallurgy and criticality of the job one shall not allow CS qualified welder for SASS, DSS, SDSS welding even though code permits.

thanks& regards,
Srinivas Rao
Welding Engineer  

Zeghanu Gigi

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Jul 31, 2022, 3:44:38 AM7/31/22
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Some contractors use the essential variable tables (QW-352 thru 357) to minimize their costs. For instance, they might test the welder for stainless steel material by using carbon steel material.

Consider the actual project material is stainless steel and you do not want to waste stainless steel material for testing.

You ask the welder to weld in carbon steel material but with stainless steel filler metal.

Ø Based on the essential variable table P number 1 (Carbon Steel) qualifies P 8 (Stainless Steel), and the

Ø  F number is the same.

Ø So you qualify your welder for stainless steel material by using carbon steel material but stainless steel filler metal.

Ø Adding back gas(purge gas) for SS welding -NO ESSENTIAL VARIABLE



Sham Shahabuddin -Welding Inspector, HANBO

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Jul 31, 2022, 3:44:47 AM7/31/22
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Dear Mr. Madheswarn

Since you haven't mentioned the Code Reference, I'm considering ASME SEC IX which is widely used in the industry. As per ASME SEC IX, if the welder is qualified to weld the filler ER70S2, which falls under F-Number F6, he can weld all the filler which falls under F-Number F6, as per QW-433. Since ER316 and other filler wires of SS fall under F-Number F6, the welder can weld these SS Filler wires. Note that other essential variables shall also be noted like Backing, Purging which depends upon the Welding process.

Also please note which Code is referred and based on that this qualification also changes.

Regards
SHAM SHAHABUDDIN
QC INSPECTOR - WELDING


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Sham Shahabuddin -Welding Inspector, HANBO

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Jul 31, 2022, 3:44:57 AM7/31/22
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Dear Mr. Mahesh

Yes you are correct, if the welder is Qualified in P1(CS) he is qualified to weld all metals of P‐No. 1 through P‐No. 15F, P‐No. 34, and P‐No. 41 through P‐No. 49. Since SS material falls in P8, the welder can weld SS Base Metal also.

Regards
SHAM SHAHABUDDIN
QC INSPECTOR - WELDING

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KRISHNASAMY MASANAM

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Sep 7, 2022, 2:20:34 AM9/7/22
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Dear Sirs, 

 

Greetings and have a good day… I need your suggestions for the below items... 


we have done Super duplex to Super duplex WPS and PQR, and it was successfully accepted in mechanical tests. While sent to the client for approval, they were requested to do the chemical test. We did the chemical test at three times which are failed, we don’t know what was wrong, why the test is failed, I have attached the files of the welding parameters of PQR for your reference, Could you please advise us how to solve this issue… Thanks in advance…  



Thanks and regards,

Krishnasamy Masanam
QC Supervisor - Mechanical
China National Chemical Engineering Third Construction Company
South Ghawar Gas Separation Plant
Contact No: +966 54 798 2196
WhatsApp:  +91 93423 11004

From: material...@googlegroups.com <material...@googlegroups.com> on behalf of pgos...@rogers.com <pgos...@rogers.com>
Sent: Friday, July 29, 2022 3:55 PM
To: material...@googlegroups.com <material...@googlegroups.com>
Subject: [MW:33323] RE: 33319] CS material, E70S2- Welder qualified , can he weld SS 316 material & Duplex, Super duplex material with E70s2 qualification ? or he should be qualified by separate SS 316 & Duplex ,SDSS material ?
 

praveen alavandar

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Sep 7, 2022, 3:37:33 AM9/7/22
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Dear Krishnasamy,

Please use matching welding SDSS welding consumable, I see you are using ER / E 2209 grades for super duplex grades, which obviously will not meet the chemistry requirements.

Regards,

manish kulkarni

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Sep 7, 2022, 3:37:41 AM9/7/22
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Pl check your PQR ,you have used 22Cr filler for Welding of 25 Cr material. 
Weld chemical shall match or exceed parent metal chemical analysis for duplex SS.
Regards 


On Wed, 7 Sept 2022 at 11:50 am, KRISHNASAMY MASANAM

james gerald

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Sep 7, 2022, 4:24:55 AM9/7/22
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ER2594 IS Preferable for welding grade 32750. 
On Wed, 7 Sept 2022 at 11:37, 'manish kulkarni' via Materials & Welding

Naveen Raj

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Sep 7, 2022, 6:05:46 AM9/7/22
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Hi,

Kindly use SDSS welding consumable instead of DSS (use GTAW ER-2594 & SMAW E-2594).

Since you're already qualified the PQR just check client specification to use the same in actual job (SDSS consumable cost is more and PQR re-qualification cost also more so check with client for using same PQR with SDSS consumable on the job) 

Best Regards,
Naveenraj. R 

james gerald

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Sep 7, 2022, 6:05:55 AM9/7/22
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Reason for chemistry is to have matching consumable and to havePREN above 40 and to have  proper delta ferrite percentage for uns 32750 grade



On Wed, 7 Sept 2022 at 12:24, 'james gerald' via Materials & Welding

Ahmad el-sharkawy

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Sep 7, 2022, 6:56:14 AM9/7/22
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gents;
if he use E2594 and ER2594 without nitrogen in purging and shielding in mixing gas corrosion test will not pass by any way.

Ahmed Elsharkawy| QA/QC Engineer.
Mobile:    (+20) 01110423873
Mobile:    (+20) 01026633417
Email:   Ahmad.Sh...@gmail.com



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Sathish Kumar C

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Sep 7, 2022, 11:15:59 PM9/7/22
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Hi Krishna Ji
The matching filler is 2594/2595 for DSS materials. We have to use the 2209 filler for Duplex materials

Thank you,
Best Regards
SathishKumar C
 


Shahil Saini

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Sep 7, 2022, 11:32:05 PM9/7/22
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Hello krishnaswamy

We are also working on super duplex stainless steel,  you can change the welding consumable, on the place of E2209-15 and ER 2209 you can use ER 2594 and E2594-15.

To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/PH0PR07MB92354351F7F51CD1C0E4640BAB419%40PH0PR07MB9235.namprd07.prod.outlook.com.
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Vishwas Keskar

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Sep 8, 2022, 12:08:57 AM9/8/22
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TYP 2209 is not an appropriate  filler metal for Super duplex UNS S32750
TYP 2594 shall be used 

Thanks  and regards

Vishwas - IWE
International Welding Engineer 

Abdul Rauf

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Sep 11, 2022, 2:15:43 AM9/11/22
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Dear

Please confirm the purity of Argon gas and monitor the flow rate minutely. 

Regards 

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