Skip to main content

Re: [MW:35908] Visual examination- Any reference

By Materials & Welding



Dear Mr. Pradeep,

The statement is essentially correct. It is not a present Section V requirement but, it was in the earlier editions and is still preserved through 

cross-references in other ASME sections. The controlling clause is: ASME Section V– Article 9 (T-952  or T-953, depending on the edition).

Typical wording is edition-dependent and wording shift slightly between editions, which is why you may not see the exact sentence you

quoted in your copy.

·   Viewing distance: The VT shall be conducted at a distance not greater than 24 in. (600 mm)

·   Lighting: Illumination shall be sufficient to provide a minimum of 15 foot-candles (≈160 lux) for general examination and 50 foot-candles 

    (≈540 lux) for the detection of small discontinuities.

Later editions of Section V streamlined Article 9, removing some descriptive text. The same technical requirements are now referenced 

rather than repeated. Many construction codes restate the VT requirements directly. As a result, clients often quote VT requirements from:

·  Older Section V editions

·  Construction codes (Section VIII, IX, B31, etc.)

·  Employer/Owner VT procedures derived from Article 9.

For example, ISO 17637 explicitly states:

·  Viewing distance ≤ 600 mm

·  Minimum illumination:

160   lux (~15 fc) general

500 lux (~50 fc) for fine indications

This is why many VT procedures include exactly your quoted values. 


Best way to cite it in a procedure is:

Visual examination shall be performed in accordance with ASME Section V, Article 9. Illumination and viewing conditions shall comply with 

the requirements referenced therein (minimum 15 fc for general examination; 50 fc for detection of small discontinuities, and viewing distance

not exceeding 600 mm).


Trust it is clear.

rgds,

C Sridhar.


Virus-free.www.avg.com

On Sat, 13 Dec 2025 at 11:12, s. pratheep <pratheep013@gmail.com> wrote:

Dear expert, 
please review the screenshot above. Is it correct? If so, could someone please provide a reference? Article 9 of ASME Section V does not mention this. Can anyone confirm?


With regards
Pradeep 

--
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 visit https://groups.google.com/d/msgid/materials-welding/CAD3Y_Ug421wDr0XsOy_TPCMxX%2Be8Hdj%2BCdMRxWWuGd4_ZOqqKQ%40mail.gmail.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 visit https://groups.google.com/d/msgid/materials-welding/CAHo%3DYijaW9fLo%3D%3Dr0kCzC9nP4N8imECcXqGsEQ6cW_H37aXH8A%40mail.gmail.com.

Comments

Post a Comment

Popular posts from this blog

Re: [MW:34105] SA266 GR4N 4 Cycle SPWHT

By Materials & Welding
Hi,  You are correct, Minimum refers to the one cycle for which this part will expose until final work shop PWHT. hence mill test certificate shall include this.  Max. SPWHT, refers to additional cycles of heat treatment that are reserved for future repairs during equipment lifetime.  Again, these simulated no. Of cycles shall be specified in MTC.  The idea is we need to make sure that steel mechanical properties are not compromised upon exposure to multiple repairs (i e 4 cycles in your case).  One could say, if steel is subjected to 4 cycles and is ok, then it should by defacto be good for one cycle, yet, this is wrong assumption cause mechanical problems and microstructure of materials varies accordingly based on no. Of cycles for which material will expose. This is apparent in alloy steel and especially for impact test values as an example.  In your case, this forged CS with properties before PWHT can be understood to be " as forged" condition (i.e. Wit...
Post a Comment
Read more

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