[MW:35481] Re: welding of cladded (alloy 625) pipes with single side access

dear sirs,

Cant use 7018 right after ernicrmo-3 finish. You must have butter in between, otherwise it will cause cracking. Thats for sure. We havent even mentioned the heating issue yet.

Vào lúc 13:18:21 UTC+7 ngày Thứ Tư, 8 tháng 6, 2016, Jithesh Premachandran đã viết:

Hi Nikdin,

After buttering (around 1.5mm thick alloy 625 overlay), machine it and match both ID. Then weld the root and hot pass with GTAW (ERNiCrMo-3) then fill up passes with SMAW process. 

Dont deposit any carbon steel deposits on the groove. Even you use Carbon steel bullets for fit up will leads to crack of groove weld deposits.

On Tuesday, May 24, 2016 at 1:40:39 PM UTC+4, Himan Nikdin wrote:

Dear Experts

I need a practical guide or sample WPS for welding of cladded (alloy 625) carbon steel pipes with one side access. the size of pipes are minimum  4".

Regards,

H.Nikdin

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