UG84.6 IMPACT SPECIMEN CLARIFICATION

[venkat guru]

Hi sir,
This is venkatesan from singapore.

Could you please clarify on the requirements of ASME Section Viii Div.1 Edition 2013 Section UG84.6?

PQR Base material : SA516 Gr.70 of thickness 38.1mm
Deposited weld metal like GTAW-4mm+SMAW-15mm+SAW-19.1mm

Question: HAZ impact specimen suppose has to be taken based on UG84.6, definitely GTAW process is difficult to cover.

Do we have to take impact for each process or just follow UG84.6 table?

Simply means, Impact test specimen will take for PQR/ PTC as per ASME VIII. Is based on thickness or process?

Thanks
Venkatesan

[vu duc thuan]

Hi Bro.,

For two side welded, the base material thickness 38.1mm therefore you should choose the note 2 as below and the CVN sets shall be taken by removed from depth of between 1/4t and 1/2t from weld surface. It mean that the CVN set shall be taken between from 9.55mm from root to 19.05mm from weld surface.

Note “(2) For two sided welds in base metal thicknesses greater than 3/4in. (19 mm), specimen sets shall be removed from a depth of between 1/4t and 1/2t from each weld surface”

 

Best Regards,

 

Vu Duc Thuan

Mobile No:  +(84) 983 017 936

Email Add: dthu...@gmail.com

Skype/Msn: vdthuan_vtau

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[Jim Price]

A few questions.

Is the GTAW pass your root pass?

If so is it consumed by hot pass?

What’s your primary process after the GTAW?

Is your weld joint welded from one or both sides?

 

 

Jim Price | Welding Engineer, CWI

Direct:  320.7463439 | Fax: 417-862-5564

jimp...@polarcorp.com

 

 

 

 

 

From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of venkat guru
Sent: Monday, December 21, 2015 9:40 AM
To: material...@googlegroups.com
Subject: [MW:23987] UG84.6 IMPACT SPECIMEN CLARIFICATION

 

Hi sir,

--

[Mhaskar Aly]

Yes Impact testing of HAZ will be as per Code...Code does not ask it process wise

Impact Test of Welds you can go with as per Code as well as Process wise.

Aly

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[Dinesh Gaur]

Dear Venkatesan

              For procedure qualification ,you have to comply both (ASME SecIX and ASME Sec VIII div.1,UG 84 for impact test).for PTC follow ASME Sec VIII div.1,UG 84.6 and figure UG 84.5.

To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CAOenW4gYGAnD3VXTUkHD-17oS44quXEz6WsRFQKRm_MGaGWWYQ%40mail.gmail.com.

[venkat guru]

Hi all,

Code: ASME VIII

Condition : PQR/PTC completed with combination of 3 welding process

During testing,  impact test specimen taken as per UG84 but 2 welding process not covered due to some reason
(I.e) all 10x10x55 specimen only cover one process out of 3 process.

After impact testing,  all results are accepted.

Now, Is these accepted results applicable only for tested one process or initial 3 process?

pls reply with appropriate justification

Thanks
Venkatesan
g.venka...@gmail.com
+65 84392538

[ramón ignacio briceño]

Hi Venkatesan,

The impact test welding is unique, indistinct welding processes used. Imports the correct selection of filler metal and the correct application of heat input to favorable results during the impact test specimen. Differentiate process is not the best. Again check UG-84 ASME Section VIII Div-1/2013.

Regards,

Ramon Briceno

Metallurgical Engineer

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Date: Mon, 21 Dec 2015 23:40:04 +0800

Subject: [MW:23987] UG84.6 IMPACT SPECIMEN CLARIFICATION

From: g.venka...@gmail.com
To: material...@googlegroups.com

[Perumal Govindan]

Hi
All 3 welding process shall be covered for impact testing.

Please confirm the joint is single vee or double vee.
In case if double vee joint what will be the welding process on back side welding or after back chipping, in case after back chipping if smaw process was used, needed to select impact test specimens for smaw and saw process.

Please note that sub size specimens will also be acceptable with subsequent temp. reduction.

Answer for your query: No,  3 welding process impact test specimens are required for acceptance if no back chipping was carried out.

With kind regards
Govindan

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[Joseph]

Hi Govindan,

Can you please clarify, where it is stated in code that each welding process need to be covered? As per my interpretation on ASME Div 1 &2, both speaks about weld impact specimens to be taken at 1.5mm from surface. It's nowhere specified, each welding process need to be covered.

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[Perumal Govindan]

Hi
Based on my previous experience I have replied.

I suggest Mr Venkatesan shall approach Client/PMC for acceptance.

With kind regards

Govindan

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