Re: P8 material limit of as per QW-403.6

[JAYAPAL DHAKSHNAMOORTHY]

  Dear experts,

I have qualified PQR of Thickness-6mm (P8G1) Austenitic stainless steel, & What is the minimum and max.thickness qualified  as Per QW-403.6.in WPS (for Impact).

Regards,

DHAKSHNAMOORTHY.J

[Karthik]

Hi,

In your case it is 6mm thickness, Minimum qualified thickness is 3mm and maximum is 12 mm

Thanks& Regards,

 

(Karthik)

Karthikeyan.S

M: +66-892512282SE-mail : karthi...@yahoo.com

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[Brijesh Maurya]

As per QW-403.6, minimum base metal thickness qualified is T/2 i.e. 3mm & max. thk qualified is 2T i.e. 12 mm

[JAYAPAL DHAKSHNAMOORTHY]

Hi Dears,

could you explain another also in QW 403.6 says (This variable does not apply when a WPS is qualified with a PWHT above the upper transformation temperature or when an austenitic or P.no.10H material is solution annealed after welding)

Regards,

DHAKSHNAMOORTHY.J

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[Hareesh K V]

Dear Sir, 

For the condition with impact testing,

The minimum thickness requirement is as per ASME BPVC Sec IX is 3 mm. 

The maximum thickness as per ASME BPVC Sec IX is 2T

But the maximum thickness as per ASME B 31.3 is T+6mm.

Regards, 

Hareesh K V

[José Juan Jiménez Alejandro]

Good morning and greetings to all, dear colleagues and specialists on the subject.
You can cite the paragraph of ASME B31.3 where you specify that the maximum thickness is T + 6 mm, thanks in advance.

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[Hareesh K V]

Dear Sir, 

Please refer Table 323.3.1 of ASME B31.3.

Please review. 

Regards, 

Hareesh K V

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[ABHISHEK SINGH]

As per QW-403.6 thickness limit will be 3 to 12 mm.
But in yours case what is the MDMT?

[JAYAPAL DHAKSHNAMOORTHY]

Our MDMT is -45 degree

On Tue, 14 Jan 2020, 10:08 ABHISHEK SINGH <mech....@gmail.com wrote:

As per QW-403.6 thickness limit will be 3 to 12 mm.
But in yours case what is the MDMT?

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[José Juan Jiménez Alejandro]

The P8 does not require PWHT

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[ABHISHEK SINGH]

For P No. 8 impact test is not required for MDMT Minus 45 deg. C. It’s client requirement??