Manoj,
This PQR is acceptable, it is qualified for the design thickness as mentioned below. PQR with higher soaking time is qualified for lower soaking time also as per QW- 407.2.
Note any change of PWHT (T&T) is a supplementary essential variable (i.e. where notch-toughness requirement applies ), which is not the case here.
Thanks.
Pradip Goswami,P.Eng.IWE
Welding & Metallurgical Specialist & Consultant
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of manoj john
Sent: Monday, January 23, 2012 10:26 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:13554] REGARDING PWHT of STORAGE TANK CLEAN OUT DOOR.
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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