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Re: [MW:13554] REGARDING PWHT of STORAGE TANK CLEAN OUT DOOR.

By Materials & Welding
Applicable Code is  ASME SEC IX.
Impact test not required.

On Mon, Jan 23, 2012 at 12:49 PM, james gerald <gerry_tup@yahoo.com> wrote:
Please give the detail of the applicable code and whether Impact test is required based on MDMT
 
Thanks & Regards J.Gerald Jayakumar 0091-9344954677
From: manoj john <manojacgnr@gmail.com>
To: materials-welding@googlegroups.com
Sent: Saturday, January 21, 2012 7:55 PM

Subject: [MW:13536] REGARDING PWHT of STORAGE TANK CLEAN OUT DOOR.

Dear All,

I intended to use the following  WPS  for  storage tank clean out door welding :

Test coupon thickness  -   40 mm.
Material                       -   SA 516 Gr 70
Welding process          -   SMAW.
Electrode                    -    E 7018-1
PWHT  Temperature     -   620 - 650 degree centigrade.
Soaking time               -   180 minutes.
Rate of heating            -   130 Degree centigrade.
Rate of heating            -   130 Degree centigrade.

Storage tank detail:
Shell thickness              - 18 mm
Annular plate thickness  -  20 mm
Clean out door neck       -  18 mm
Clean out door flange      -  20 mm
Material                         -  SA 516 Gr 70
Welding process            -   SMAW
Electrode                       -   E 7018 -1
Stress relieving temp      -   620 - 650 degree centigrade.  
Soaking time                 -   60 minutes.
Rate of heating              -   150 - 200 Degree centigrade.
Rate of heating              -   150 - 200 Degree centigrade

My doubt is whether the soaking time in the PQR is acceptable or I have to qualify another WPS.

Thanks in advance.
Manoj
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