Re: [MW:31043] 3 Cycle PWHT requirements acc.to ASME

QW 407.2. is it not applicable to impact requirements. 

On Fri, 26 Jun 2020 2:23 pm 'james gerald' via Materials & Welding, <materials-welding@googlegroups.com> wrote:

Is the Heat Treatment required for Plates or for the Welds.

If it is for the Plates during the procurement stage, then you need to follow the same Heat Treatment simulating the exact condition it undergoes.

1. Initial Heat Treatment for the Plates will be the first cycle.

2. PWHT after welding will be the second cycle

3. Taking into account the Repair after PWHT will be the 3rd cycle.

You can simulate the same condition on one coupon and undergo the test as per Material standard.

If it is for Welds, then you can apply PWHT in one cycle as the snap short  below.

One Coupon and the testing requirements as per ASME Sec.IX and applicable specifications.

Thanks & Regards

J.Gerald Jayakumar

On Friday, June 26, 2020, 12:12:39 PM GMT+7, K K <karan.hbl@gmail.com> 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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