PWHT REQUIRED OR NOT?

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Patel Ankit

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Dec 1, 2020, 10:12:23 PM12/1/20
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Dear Expert,

I hope all are well.

My question is In after Tubesheet Bonding PWHT required or Not?

Base Material : SA 516 GR 70. (Thk : 45 mm )
Bonding Material : SA 240 GR 316. (Thk:5mm)

Tubesheet Dia : 3000 mm

( Note : Bonding plate SS 316 : 1 No joint on base material)

Regards,
Ankit Patel
8140255303.

George Dilintas

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Dec 2, 2020, 10:30:20 PM12/2/20
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What do you mean by bonding

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udaya bhaskar

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Dec 3, 2020, 12:34:04 AM12/3/20
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Not Required PWHT For check bonding.
NDT required for check bonding

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udaya bhaskar

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Dec 3, 2020, 12:34:04 AM12/3/20
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Hello Mr. Ankith,
Please refer  for your clarification: PART UCL REQUIREMENTS FOR WELDED PRESSURE VESSELS CONSTRUCTED OF MATERIAL WITH CORROSION RESISTANT INTEGRAL CLADDING, WELD METAL OVERLAY CLADDING, OR APPLIED LININGS 

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Patel Ankit

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Dec 3, 2020, 12:34:07 AM12/3/20
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Yes sir,

After Bonding PWHT required or not??

Kannayeram Gnanapandithan

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Dec 3, 2020, 1:33:30 AM12/3/20
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is it explosive bonding

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


Patel Ankit

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Dec 3, 2020, 6:37:16 AM12/3/20
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Yes Sir,
It is explosive Bonding.

udaya bhaskar

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Dec 3, 2020, 6:37:18 AM12/3/20
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Mr.Patel, Doesn't require any PWHT after explosive cladding.  
if the customer wants you can, otherwise not.


Nithin Joseph

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Dec 4, 2020, 10:27:04 PM12/4/20
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When plate is bonded by explosion. The shape of the plate is disturbed, resulting in stresses and higher hardness. In order to straighten it up, it is always recommended to do a stress relieving heat treatment. It is nowhere specified, but to avoid issues during straightening and control hardness. 

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Nithin Joseph Dsilva

Patel Ankit

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Dec 4, 2020, 11:30:07 PM12/4/20
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Dear Sir,

If you say that stress receiving process required. My WPS also qualified with PWHT (SR) Process for SS 316 plate welding.

Pl. Suggest me.


Regards,
Ankit Patel

George Dilintas

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Dec 7, 2020, 6:28:20 AM12/7/20
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Could you send a sketch of the joint?
You question is not clear

Prasad Ghanekar

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Dec 7, 2020, 10:39:55 PM12/7/20
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Refering to SA264
HT is not mandatory for cladding process.
It's suplimentory requirement.

Prasad G.

james gerald

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Dec 8, 2020, 3:46:03 AM12/8/20
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Please provide below details.

1. Design Code.
2. Type of cladding like explosive cladding/cold rolling/weld metal overlay(electroslag strip/SAW strip/Laser)

Thanks & Regards

J.Gerald Jayakumar



Patel Ankit

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Dec 11, 2020, 4:53:23 AM12/11/20
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Dear Sir,

Construction code ASME SEC VIII Div 1.
Explosive Bonding.

Regards,
Ankit Patel

james gerald

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Dec 16, 2020, 1:03:23 AM12/16/20
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Dear Ankit,

Normally Explosive Bonding will be performed at Plate Mill and any Heat Treatment if required will be performed at Mill and covered via the MTC.

SS 316 clad plates fall under SA 264 (ASME Sec.IIA). According to the same for Explosive bonding, the clad plate shall be subjected to solution Annealing and the substrate base plate carbon steel Heat Treated to the Material standard separately  prior to Explosive Bonding and can be checked in the MTC.

Thanks & Regards

J.Gerald Jayakumar


Kannayeram Gnanapandithan

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Dec 17, 2020, 3:07:59 AM12/17/20
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before bonding, CS shall be PWHT due to one joint, NDE cleared and Explosive bonding. with these procedure no PWHT required after bonding, otherwise required, Ref UCL-34

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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