Re: [MW:15841] requirment of Lateral expansion for P1 TO P8 PQR as ASME Sec IX

Dear Ankit,

 

In my opinion Lateral Expansion value is not mandatory for PQR.

If you see QW-170 of Sec IX, (for Charpy)

 

QW-170 NOTCH-TOUGHNESS TESTS

QW-171 Notch-Toughness Tests — Charpy V-Notch

QW-171.1 General.

Charpy V-notch impact tests shall be made when required by other Sections. Test procedures and apparatus shall conform to the requirements of SA-370.

QW-171.2 Acceptance.

The acceptance criteria shall be in accordance with that Section specifying impact requirements.

If you also go to the SA370 of Sec II part A column 27. (Records)

There is also nothing mensioned about Lateral Expansion.

It may me mandatory for checking the base material but not for PQR.

Anybody have other opinion please refer the code references.

 

 

On Thu, Nov 1, 2012 at 9:58 AM, Ankit PAtel <ankit.patel@orientalindia.net> wrote:

Dear Experts,

 

We have performed a PQR for 25 thk  plate , P1(SA 516 GR-70 ) To P8(SA 240 TP-316L). These PQR has been stress relieved at 620° C & impact tested at -20°C.

The testing laboratory has noted down only the joule values for the impact test, but they have not noted the Lateral Expansion Values P-8 Material.

The Avg. Joules Values observed are as follows:

Weld-72.67 J

HAZ(GR-70)-35.33J

HAZ(GR-316L)-158 J

PARENT(GR-70)-51.33J

PARENT(GR-316L)-298 J

 

Now our TPI says that for GR-316L Lateral Expansion Values is must for acceptance of the PQR.

Is it so?

Or based on these joules values these PQR can be accepted & used for weld having requirement of impact  test at -20°c

 

 

Thanks & Regards

Ankit Patel
Engineer Quality

 

 

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Thanks & Regards
Biplab Pal
Welding Inspector

E-mail:   biplab.mech@gmail.com
 
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