Acceptable Values for Charpy Impact Test at -(minus) 196 degC for A312 TP304

[Anurudh Choudhary]

Dear All,

I'm using A312 TP304 pipe for design temperature -(minus) 196 degC for BOIL OFF GAS (BOG) service.

we have carried out the charpy impact test at -(minus) 196 degC for the pipe. we are having average value of Joules for pipe specimens.

Please provide/guide me with the Acceptable value for Charpy impact values( Joules) at -(minus) 196 degC along with codes/reference for A312 TP304 Pipe.

Kind Regards,

Choudhary Anurudh

[Tri Yulianto]

Hi Choudhary,

Please see ASTM A 370 table 9 for charpy  value acceptance criteria for subsize specimen.

Cheers,

Tri Yulianto
BAM Clough JV - Wheatstone LNG

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[John Henning]

For stainless steels in low temperature applications, charpy impact acceptance criteria is lateral expansion not absorbed energy.  For example see ASME Sc. VIII UHA-51 or B31.3 paragraph 323.3.5(b).

 

John A. Henning

Welding & Materials

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[Parag Pansare]

Dear Anurudh,

As per the material specification A312 impact test is not mandatory for TP 304 grade material upto -250°C. Pl. refer to the first paragraph of this material specification.
Secondly, if your project specification requires impact test to be carried out at -196°C then it is recommended to measure the lateral expansion instead of the impact values.
which is 0.38 mm or higher per this material specification or per B31.3, Pl.refer clause no. 323.3.5 of B 31.3.

Regards,

PARAG PANSARE

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[george....@gr.bureauveritas.com]

Yes John.
However, for those who are using ASME for Pressure equipment to be certified in accordance with 97/23/EC, besides the lateral expansion, the value of 27 Joule has to be obtained on a standard ISO specimen

best regards

Dr. Georgios Dilintas

Authorized Nuclear Inspector
Authorized Inspector Supervisor
API 510 Inspector

I&F REGIONAL TECHNICAL MANAGER
BUREAU VERITAS HELLAS

Tel: +30 210 40 63 113/4
Fax: +30 210 40 63 118
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(See attached file: Dilintas_George.vcf)

"John Henning" ---14/03/2014 17:05:06---For stainless steels in low temperature applications, charpy impact acceptance criteria is lateral e

Hi Choudhary,

Cheers,

This message contains confidential information. To know more, please click on the following link: http://disclaimer.bureauveritas.com

[John Henning]

Problem is they never tell us the whole story.

 

John A. Henning

Welding & Materials

 

[george....@gr.bureauveritas.com]

You have to look in your design code for this. You will find this info neither in ASME IX nor in A312

best regards

Dr. Georgios Dilintas

Authorized Nuclear Inspector
Authorized Inspector Supervisor
API 510 Inspector

I&F REGIONAL TECHNICAL MANAGER
BUREAU VERITAS HELLAS

Tel: +30 210 40 63 113/4
Fax: +30 210 40 63 118
Cell: +30 69 44 64 62 04
(See attached file: Dilintas_George.vcf)

Anurudh Choudhary ---14/03/2014 15:00:23---Dear All, I'm using A312 TP304 pipe for design temperature -(minus) 196 degC for BOIL

From: Anurudh Choudhary <theoilga...@gmail.com>
To: material...@googlegroups.com
Date: 14/03/2014 15:00
Subject: [MW:20323] Acceptable Values for Charpy Impact Test at -(minus) 196 degC for A312 TP304
Sent by: material...@googlegroups.com

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