Re: [MW:31038] 3 Cycle PWHT requirements acc.to ASME

testing requirements are same as when you qualify a new PQR.

only additional is that test coupon will be subjected to heat treatment 3 times (3 cycles)

On Friday, 26 June 2020 at 10:42:46 UTC+5:30 K K wrote:

Dear All,

Expertise can you please see my query, Can I get the solution to the below query.

How to Calculate 3 cycle PWHT, What are the requirements? please explain to me in detail.

What are the initial requirements and what are mechanical and hardness requirements? 

Please explain to me in detail with a step vise.

I hope i will get a good response from the Materials & Welding team and from Expertise.

Thanks

Kiran

On Wednesday, June 24, 2020 at 12:10:59 PM UTC+5:30, K K wrote:

Thanks for your support.

Regarding PWHT of 3 cycles.

Below I have mentioned my PQR ranges for PWHT.

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.

As per the above range, it's qualified 3 cycles, but how? and for 3 Cycles PWHT where I required test coupons? how many coupons tests shall I have conduct?

Please clarify my above query in detail with code.

Thanks once again.

Kiran

On Tuesday, June 23, 2020 at 11:43:19 AM UTC+5:30, petervsoloman wrote:

Dear Kiran,

Once PWHT competed for joints due to modification cut/reweld or repair re PWHT required that particular joints.

it is mention in the procedure is enough to do the job. This you can mention in your weld repair procedure.

Regards,

PETER SOLOMAN

+971 33663119

On Mon, Jun 22, 2020 at 7:32 AM K K <kara...@gmail.com> wrote:

Dear All,

Please describe to me regarding 3 cycle PWHT requirements as per ASME.

If my PQR tested with two coupons where I required one more test coupon and additional one more for repair.

Please explain to me in detail and related to mechanical testing for PWHT.

What is the meaning of this paragraph - **an additional one PWHT cycle shall be incorporated to simulate field repair or modification.**

Thanks and Regards

Kiran

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