Wednesday, June 24, 2020

Re: [MW:31028] PQR shall be tested in Min & Max PWHT (3 Cycle minimum simulation) condition.

Dear Vijay,

The above query is related to me also, can you please explain in detail.

And I have qualified PQR, please refer to I have included the two different  PQR range. 

Material Both PQR  ASTM A106 Gr B

Thickness Range - 5 mm to 25 mm

First PQR Range - 

POST WELD HEAT TREATMENT( QW-407)
TEMPERATURE RANGE 630 ±10° C
SOAKING PERIOD 190Min
HEATING RATE 190°C/Hours Max
COOLING RATE 190°C/Hours Max

Second PQR Range - 

  TEMPERATURE RANGE TP1 - 638 ±10° C  TP2 - 635  ±10° C
 SOAKING PERIOD:  TP1 - 72 min  TP2 - 189 min 
 HEATING RATE:  TP1 -170°C/Hours and TP2-171°C
 COOLING RATE:  TP1- 163°C/Hours and TP2-106°C/h

But it is not clear to me how to confirm if mechanical properties are ok after just one PWHT ( for sure Tensile St. and Y. S. will be ok, since values are greater, but hardness test?

Please explain to me about the mechanical test and  3 cycles PWHT. Where I require test coupons for first PQR.

Thanks and Regards
Kiran



On Tue, Dec 17, 2019 at 8:54 AM Vijay Katkar <katkar.vijay22@gmail.com> wrote:
Hi Kunal,

3 simulation cycle is required with considering future service repair.

You need to prove that after considering 3 simulation PWHT cycle the minimum tensile requirement can be achievable . But you need to check the base metal also, 

Is the base metal tested/qualified with 3 simulation cycle?

Thank you 

Vijay Katkar 


On Mon, 16 Dec 2019, 1:56 pm , <kunalenfield350@gmail.com> wrote:
Dear Sir's

Client has specified the requirement for testing the PQR in Min & Max PWHT (3 Cycle simulation) condition. As we had pre-qualified PQR with one cycle of 2 Hours soaking. So please suggest how to comply with the requirement & what does this "3 cycle simulation" exactly means?


Regards
Kunal Srivastava

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/3a501189-a776-4557-a36c-bfdc41b280bb%40googlegroups.com.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CAP37wrLbwQ7quZ%2B065SH91POWJFLLCA9gTaFKBT-2ikjX9HzMw%40mail.gmail.com.


--

KIRAN

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CAMFjUk77HDdane_hEbcY96b%2BoO8BN9AQtDUvPBh2KGaKyae3Ug%40mail.gmail.com.

No comments:

Re: [MW:35241] Overlay welding defects

Dear Sir, The below is another type of defect,Mostly these two type of defects we faced. Regards, R.Gowtham. On Wed, Sep 11, 2024 at 1:42 PM...