CLAD MATERIALS -WELDING WPS /PQR ERNiCrMo3 / 7018-1 Combination

PK M

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Apr 14, 2021, 2:12:44 AM4/14/21

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Hi experts,

CLAD MATERIALS -WELDING

We have the following Clad Pipe and we are preparing WPS /PQR to weld this SPOOL.

As I know we need to use ERNiCrMo3 / 7018-1 Combination (if GTAW+SMAW) to Complete weld.

But if anyone is having experience with this, please advise whether we will go with

GTAW - ER NiCrMo3 ( Root & Hot )

SMAW – E7018-1 (Balance Filling /Capping).

Please Explain any troubles may have happened regarding dilution or not.

Need Aramco and International code reference? If any one has a sample WPS/PQR Please share with us.

Any corrosion test or NDT

Waiting for your scientific and specific reply.

Thanks in Advance.

Pkm

pkm...@gmail.com

pravean ashok

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Apr 14, 2021, 10:38:01 AM4/14/21

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Dear we have in our previous project

Clad material in AlHosan gas Abudhabi and we found there is no issue in that material go a head

Regards

Pravean

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Atul Chaturvedi

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Apr 14, 2021, 10:38:01 AM4/14/21

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Please use ERNiCrMo3 / ENiCrMo3 combination.

Regards

Atul chaturvedi

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Alcindo Jardim

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Apr 14, 2021, 11:41:59 PM4/14/21

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I know that in clad welding You MUST do at least 3 overlays, otherwise the clad won´t word as it should be. You can use 2 WPS, for this pipe welding. One for ER NiCrMo3 and other to 7018-1.

According to some codes you will need many corrosion tests to approve the PQR, and for the root and hot pass you´ll need more than 3 overlays too. You will need to do all NDT for the ER NiCrMo3 before start the SC welding...

Alcindo O. J. Jr.

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PK M

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Apr 18, 2021, 1:50:46 AM4/18/21

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Dear Sir,

Please Share that WPS.

pkm...@gmail.com

thank you.

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Mehrab Chakoshkar

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Apr 19, 2023, 10:59:31 PM4/19/23

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Hi everyone

For joining the C.S pipe that cladded with Inconel 625, it should be fully welded by NiCrMo-3 (SMAW or GTAW). welding the root pass with NiCrMo-3 and filling the join with 7018 or other C.S consumable material is big mistake. because during welding we'll have dilution and We'll have Cr3C2, this composition will be deposited in the grain boundary and make the alloy very brittle.

If weld a test coupon with ER-NiCrMo-3 and E7018 you can see how easily it will be broken during the bending test.

I have more experience in welding the claldded pipe together and overlaying the pipe so feel free to contact me for more information.