SA 387 GR 11 CL2 and SA 387 GR 22 CL2

[Vishwas Keskar Welding Manager WELDING]

Experts 

The dished end is to be fabricated with one number Chordal seam  for MOC of 

1) SA 387 GR 11 CL2

2)SA 387 GR 22  CL2

One  chordal seam in dished end is coming due  to plate  size( width) limitation  and the  diameter required of  dished end. So butt joint welding is to be done  followed by NDT .

Hot forming is planned . After forming is completed, separate   Normalizing and tempering Heat treatment is required as per Client specification.

PQR is to be established as per ASME SEC IX  .

Pl. suggest suitable consumable  and maintain strength 

Pl. share experience if any 

[Kannayeram Gnanapandithan]

ER 90S B3

THANKS & BEST REGARDS,

KG.PANDITHAN, BE, IWE,  CSWIP 3.1,

ISO 9712 Level 2 in VT,

ASNT-Level II in PT,MT,RT & UT,

LA ISO 9001-2015,

International Welding Engineer. 

CONSULTANT-WELDING & QUALITY

Mobile no: +919940739349

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[pgos...@rogers.com]

You should use E 8018 B2 or 8018B3L as SMAW consumables. SAW wire flux combination matching SMAW chemistry is also to be considered. If the hardness requirement is in place, then 8018 B3L would be advisable.

On Cr-Mo steels normalizing may sacrifice the Charpy impact , hence consumable with extra Mo(B3Lgrades) may be of help.  

 

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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Email:pgos...@rogers.com,pradip....@gmail.com

Cell/Whasapp:1-905-9793232

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[Prakash Hegde]

Hi

Its bit complicated

Does gr22 plates undergone simulation Heat treatment Generaly this Mail is QT and  Nr T is not prefered if NR T

 you require to carry NR T  and further PWHt on welded coupon and it is bit difficult to achieve property on weld by following NRT +pwht as per original plate Nr T (supplied condition

Generally such steel is welded using 9015EB3

Better go for crown and petal system for D end

What is the thk of Dend

Regards

Hegde

As 

You dont get Consumbles for 

a

les

Sent from Yahoo Mail on Android

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[Vishwas Keskar]

Thanks a lot for your reply

Will run PQR and check 

Good Night 

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[Vishwas Keskar]

Yes ,I too think the same way.

But want to understand /know what is followed  by other fabricaters when this condition arises.

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[Prakash Hegde]

Hi!

my experience 

Normalising of weld of higher thickness reduces the YS and UTS cosiderably 

as D/End manufacturer invariably ask for repeated Normalising during forming  ( say 2 to 3 times) and they take soaking temperature to higher side i.e above  930 c

Therefor it is recomended to go for Total Hot forming of D/E ( with no weld seam)

and then after go for Nr +T  to get back required properties

or Go for Crown and Petal type D/E having   which does not req NR +T of Weld

(As its total LM parameter No increases)

Regards

 

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[Vanchinath S.A.]

Low alloy steel weld will fail after Q&T or N&T. crown and petal is the answer.

regards

vanchi

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[Kannayeram Gnanapandithan]

how , weld metal is a  bainetic structure, how the strength decreases,  for carbon steel , yes, if we do NT, it will get reduced, for that we have to go higher, overmatched electrode.

THANKS & BEST REGARDS,

KG.PANDITHAN, BE, IWE,  CSWIP 3.1,

ISO 9712 Level 2 in VT,

ASNT-Level II in PT,MT,RT & UT,

LA ISO 9001-2015,

International Welding Engineer. 

CONSULTANT-WELDING & QUALITY

Mobile no: +919940739349

To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/463709533.110531.1655442583764%40mail.yahoo.com.

[chandraknat vaidya]

Yes. Preferred is crown & petal construction for LAS.

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