IMPACT TEST IN PTC AT -47 DEG

[Vivek Pandey]

DEAR EXPERTS

AT this time Iam facing a critcal problem in impact test at minus 47
deg. I have a already existing qualified PQR WITH E 8018G & IMPACT
Tested at -47deg. I have used the same PQR in vessel production test
at -47deg but this PTC has failed in imapct test of WELD & HAZ at
-47deg we are getting erratic value 10, 12, 90 in weld & 60, 10, 50 in
HAZ

Kindly suggest your opanion about this problem as soon as possible

[Dindo]

you have to monitor the actual welding of the coupon and make sure that you are within the parameters of the qualified WPS, if it still fails you can always send the coupon for stress relieving (which is more costly since you have to PWHT your vessel too)

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[Sundaram Elumalai]

Hi,

 

Now we are qualifying two new PQR for new project for less base metal

thick. (9mm). Code AWS D1.1

 

ROOT / HOT Pass              -GTAW (deposited 4mm)

Fill/Cap                                - SMAW (deposited 5mm)

 

We need to perform the impact test as per Client Welding spec for each process.

In this case, we have to go for Sub size with temperature reduction.

 

Client Welding spec requirement is minimum - 29 °C. 

 

If I go with 10x5mm sub size, I need to reduce 11.1 °C  and test to be

done at -40.1°C. (  -29 -11.1) 

Then Joule value will considered as per ASTM 370,16 J from the below

second table.

 

Is it correct ?

 

With Kind Regards,

 

S.Elumalai.

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[Rajagopal Kannan]

Hi,

It is not practical to go for 5mm thk. with the weld deposit of 5mm.

You have to go for lesser dimensions.

Thanks,

K.Rajagopal

--

[Prakash Hegde]

Hi Aas such   there is no need of sub size You can have single size of 9 or 8.5mm x 10mm Impact specimen as it covers both process   Regards   Hegde --- On Wed, 21/12/11, Sundaram Elumalai <Elumalai...@starfab.com.sa> wrote:

second table.   Is it correct ?   With Kind Regards,

[james gerald]

Sizing can be done either at the root or cap and subsize of 5mm can be obtained with the notch located in the particular process.

 

Yes the test temperature of  -40.1°C. is correct.

 

If the Full size(10x10mm) requirement is 34J then for subsize(10x5mm)  16J is acceptable

 

 

Thanks & Reagrds
 
J.Gerald Jayakumar
00968-93281596

From: Rajagopal Kannan <rajagopa...@gmail.com>
To: material...@googlegroups.com
Sent: Wednesday, December 21, 2011 9:57 AM
Subject: Re: [MW:13244] IMPACT TEST -SUB SIZE

[MM]

Dear Elumalai,

Nice to hear from you.

 

If we do impact testing at the specimen size of 10 X 7.2mm (i.e 80% of 9mm) there is no need of reduction in temperature

 

If we are using a sub size of 5mm (i.e lesser than 80% of original) then we have to go for reduction in temperature

As per AWS D1.1- 2008 table 4.14 note (C ) and table 4.15 for this case further reduction of 11.1°C is required  i.e -29 – 11 = -41.1°C (9mm-5mm)

 

The observed energy required for sub size as per note of table 4.15 and ASTM A370 Table 9 is 14 Joules average and 11 joules individual

 

 

 

 

 

 

 

 

 

 

 

Cheers

MM

 

 

From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of Sundaram Elumalai
Sent: Wednesday, December 21, 2011 8:16 AM
To: material...@googlegroups.com
Subject: [MW:13243] IMPACT TEST -SUB SIZE

 

Hi,

--

[Sundaram Elumalai]

Hi,

 

We need to perform the impact test as per Client Welding spec for each process. This is the reason I have to go with subsize.

 

With Kind Regards,

 

S.Elumalai.

---

[meisam shokri arfaei]

Dear Sir,

According to ASTM A370 part 26.3, the choose of temperature reduction or changing the acceptance criteria or both of them is based on your contract. If you need to change the acceptance, you can use table 9 and if you have to change temperature you can use table UG-84.2 of section 8, div.1.

But here we have a note, but it is my interpretation.

The reduction in the temperature (if needed) shall calculate from the diference between the actual thickness of the material and the size of the specimen. In your case because you use two different processes, we can consider each process as an individual thickness. So you may make a set of impact specimens from GTAW with 3.33x10 mm sub-size standard specimen and a set of specimens from SMAW with 5x10 mm sub-size standard specimen which both of them do not need any reduction in temperature because in the case of GTAW the nominal thickness is 4mm and your specimen is 3.33 and 3.33 is mor than 80% of 4 mm. Also it is true about SMAW part.

 

In the othe way, you can consider that you wand make  specimens from multi-process welded joints regardless of the processes. In your case you can make a 7.5x10 sub-size standard specimen without any reduction in the temperature because 7.5mm is more than 9mmx80% or 7.2mm.

 

Regards

M. Shokri Arfaei

International Welding Engineer (IWE)

ASNT NDT Level III

ERI Metallurgy Lab. Manager

Tel: +98-21-66282127

Fax: +98-21-66282779

 

Please don't print this e-mail unless you really need to. BeGreen!

[Darapu Dattatreya]

Dear Experts,

 

We are facing Impact Test failures problem after Normalizing the pipe fittings manufactured Impact Tested SA 5416 Gr. 70 Material at - 46 deg. C

 

We have put a lot of pipe fittings in our normalizing furnace 25 mm thk. & 14 thk pipe fittings, after that we have selected one sample each thk and Impact tested, the 14 mm thk fitting the passing the Impact test requirement for parent metal, HAZ & Weld as per ASME B 31.3 & the other sample 25 mm thk. failing the Impact requirement on Parent metal & HAZ and the Impact value we have observed 8 , 10 & 12 etc. and the 

 

Can any body explain the reason for the failures in Impact test requirements as per ASME B 31.1.

 

Regards,

 

D.Dattatreya.    

On Tuesday, December 20, 2011 10:16 PM, Dindo <dindod...@gmail.com> wrote:

you have to monitor the actual welding of the coupon and make sure that you are within the parameters of the qualified WPS, if it still fails you can always send the coupon for stress relieving (which is more costly since you have to PWHT your vessel too)

On Mon, Dec 19, 2011 at 10:27 PM, Vivek Pandey <vivek....@gmail.com> wrote:

DEAR EXPERTS

AT this time Iam facing a critcal problem in impact test at minus 47
deg. I have a already existing qualified PQR WITH E 8018G & IMPACT
Tested at -47deg. I have used the same PQR in  vessel production test
at -47deg but this PTC has failed in imapct test of WELD & HAZ at
-47deg we are getting erratic value 10, 12, 90 in weld & 60, 10, 50 in
HAZ

Kindly suggest your opanion  about this problem as soon as possible

--
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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

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

could you send your normalizing procedure?

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)

Darapu Dattatreya ---18/12/2013 06:43:09---Dear Experts,  

http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm

The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

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[Darapu Dattatreya]

Dear Expert,

 

Please find attached Heat treatment procedure as requested by you.

 

 

Regards,

 

D.Dattatreya.

On Wednesday, December 18, 2013 1:48 PM, "george....@gr.bureauveritas.com" <george....@gr.bureauveritas.com> wrote:

could you send your normalizing procedure?

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)
Darapu Dattatreya ---18/12/2013 06:43:09---Dear Experts,  

From: Darapu Dattatreya <darapu_d...@yahoo.com>
To: "material...@googlegroups.com" <material...@googlegroups.com>
Date: 18/12/2013 06:43
Subject: Re: [MW:19645] IMPACT TEST IN PTC AT -47 DEG
Sent by: material...@googlegroups.com

[kannayeram gnanapandithan]

what is consumable classicification?

[Nilesh Pathare]

Please note that in ASME Sec. II C for 8018G the elements required the minimum values as mentioned in note G. So the properties of each batch of consumables are not guaranteed to meet the requirement. Please check the test certificates for 8018-G. It is better to select the consumables from8018 B series or C series (specially for Low temp. applications) as per your base material requirement.

(G) In order to meet the alloy requirements of the “G” group, the undiluted weld metal shall have the minimum of at least one of the elements listed in this table. Additional chemical requirements

may be agreed to between supplier and purchaser.

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Best Regards,

Nilesh Pathare