Skip to main content

Re: [MW:34684] Impact testing - V NOTCH CHARPY. Recommendation

By Materials & Welding

Just to add. From your Question I assume you are using a code such as B31.3 which gives the requirement for the Material specification whether Impact testing is required based on the Job Thickness. In B31.3 there is a stress table which for carbon steels provide Grahs A B C D or the minimum temperature the material requires impact testing.

A snap shot provided below.

Inline image

Please also see the snapshot of Note 6 highlighted above.
Inline image

Snap shot of Curve

Inline image

Inline image


Subsize Charpy impact value provided in my  First mail

Thanks & Regards

J.Gerald Jayakumar




On Wednesday, 6 December, 2023 at 09:34:42 am IST, Prathamesh Patkar <prathameshpatkar@swastikindustriesindia.in> wrote:


Dear Sir,

Thank you for the response.

I had one more query. Are there any acceptance criteria for minus temperature? eg... the specimen should sustain 12 J impact at -20c in order to qualify. 



On Mon, Dec 4, 2023 at 5:30 PM 'james gerald' via Materials & Welding <materials-welding@googlegroups.com> wrote:
A Charpy Impact test is not required for specimen thickness less than 2.5mm.

Subsize specimens can be machined from the Pipe OD 60mm and thickness 5.5mm. Please check with the Mechanical testing lab.

Please refer to ASME Sec.IIA section SA-370.

If specimen thickness exceeds 80% during machining from the original size, temperature reduction according to the Applicable Code shall be applied.

For subsize specimens Impact values refer to snap shot.

Inline image


Thanks & Regards

J.Gerald Jayakumar




On Monday, 4 December, 2023 at 05:06:28 pm IST, Prats <prathameshpatkar@swastikindustriesindia.in> wrote:


Hello,

We have an impact testing requirement to be done on a pipe with an outer diameter of 60mm and a thickness of 5.5mm. 

What specimen size should we select for the testing? As the standard "ASTM E23-23A" states, specimen size should be 55L x 10W x 10 thick. We are a bit confused regarding the specimen size...has anyone faced a similar issue? please recommend 

Moreover, the specimen should sustain 27 J. 

Please help.

Thanks & Regards 
Prats

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/d6ea2566-4818-419b-9dcf-d307c61bab53n%40googlegroups.com.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/598336985.6110574.1701690837182%40mail.yahoo.com.


--

Regards,




--
Thanks & Regards
Prathamesh S Patkar

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CAC4daO1FWBtE5gfLNgNYqhsVg%2Bu0V475C3r53uDxgj82GDtq8A%40mail.gmail.com.

Comments

Post a Comment

Popular posts from this blog

Materails FAQs

By Materials & Welding
Q: What are equivalents for standard Q 235 B (and Q 235 A) for U-channels? (asked by: boris.vielhaber@vait.com) A: DIN Nr. = 2393 T.2, 2394 T.2, EN 10025 W. Nr. DIN 17007 = 1.0038 Design DIN 17006 = RSt 37-2, S235JRG2 (Fe 360 B) Q: What is St DIN 2391 BK material? (asked by: dmcandrews@automaticstamp.com) A: Precision steel tubes, cold-finished/hard. Q: What is C.D.W. Boiler Tube? (asked by: montydude123@yahoo.com) A: Cold Drawn Welded Boiler Tube. Q: WHAT IS W.Nr. 1.4301? PLS TELL US IN EASY LANGUAGUE (asked...
21 comments
Read more

Heat tint (temper) colours on stainless steel surfaces heated in air // Heat tint

By Materials & Welding
Introduction The colour formed when stainless steel is heated, either in a furnace application or in the heat affected zone of welds, is dependent on several factors that are related to the oxidation resistance of the steel. The heat tint or temper colour formed is caused by the progressive thickening of the surface oxide layer and so, as temperature is increased, the colours change.   Oxidation resistance of stainless steels However, there are several factors that affect the degree of colour change and so there is no a single table of colour and temperature that represents all cases. The colours formed can only be used as an indication of the temperature to which the steel has been heated. Factors affecting the heat tint colours formed Steel composition The chromium content is the most important single factor affecting oxidation resistance. The higher the chromium, the more heat resistant the steel and so the development of the heat tint colou...
Post a Comment
Read more

Re: [MW:10788] ON PLOT PIPING & OFF PLOT PIPING

By Materials & Welding
Piping systems involved for the flow lines and gathering lines from the well head isolation valve to the production facility or processing plant isolation valve are determined as OFF PLOT. ON PLOT defines piping system in the processing plant and production platform. ANSI/ASME B31.4 applies for off plot piping system. B31.4 allows the use of either API 1104 or ASME section IX (as appropriate). However, occasionally, a very small system such as piping within 500 feet of a processing plant (some client also said 400 feet) may be declared B31.3 rather than B31.4. When B31.3 is invoked, only ASME Section IX is used. before you decide which code to use for welding procedure and/or welder qualification for pipe welding, you have to know the design and construction code applicable to the system. Please read far enough into scope and diagram illustrating the application of either B31.3 and B31.4 hope this helps rgds 2011/4/21 pradip kumar sil < pradipsil@gmail.com > Dear all, ...
Post a Comment
Read more