GMAW-STT + FCAW WPS

[manpreet]

G'day,

I am qualifying below procedure to be PWHT'd at 3 hrs and impact tested @ -46 deg C, please share your opinion of passing the testing:

Mat A: A333 Gr 6

Mat B: A350 LF2

Dia: 300NB

Thk: 33.32mm

GMAW-STT: ER70S-6

FCAW: E71T-1M12JM H8

Hardness: 250 HV10 max.

I am aware that ER70S-6 is only tested to -29 deg C and flux wire to -40 deg C, and i am trying to replace the STT wire with ER80SD2, but difficult to get them in given timeframe.

Thanks.

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[kannayeram gnanapandithan]

go with F71T5

THANKS & BEST REGARDS

KG.PANDITHAN, AWS-CWI, CSWIP 3.1

CONSULTANT-WELDING & QUALITY

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[hamid kananinezhad]

Dear Sir

As you know  A333,Gr6 and A350-LF2(CL.1)  is LTCS material it means  these material  is used at low tempreture .The wire consumable shuld be passed this tempreture.sultable wire is 

 ER 80S Ni2(SFA 5.28) for GTAW and E8018-C1(SFA 5.5) for SMAW

 

B.Regards

h.Kanani

[Ramin Kondori]

Hi Manpreet,

Applying PWHT after welding will improve your weld and HAZ toughness to the level you need.

I have done this successfully before using low heat input pulsed-MIG (ER70S-6).

GMAW-STT works just the same (even better) and you will be all right.

Best Regards

Ramin Kondori

Sr. QA/QC engineer

Yadavaran Oilfield Project

SIPC (SINOPEC)