Skip to main content

Re: [MW:35507] WPS for Furnace PWHT

As per ASME B31.3, Clause 331.1.6 (b):
Any required PWHT shall be carried out in accordance with the qualified WPS.

For furnace PWHT involving spools of different diameters and varying thicknesses, all weld joints subjected to PWHT must be welded using a WPS qualified with PWHT. This requirement remains applicable even when the individual joint thickness is less than 20 mm, despite the code-specified threshold of greater than 20 mm for P1 materials, as outlined in Table 331.1.1 of ASME B31.3 (2008).

Therefore, performing furnace PWHT on any joint that was welded using a WPS not approved for PWHT constitutes a non-conformance with the applicable quality requirements. Do you agree? If not please elaborate.

Prakash


On Sat, Apr 5, 2025 at 7:52 AM Hareesh K V <hareesh.kitco@gmail.com> wrote:
Dear Sir,

I am not clear about the question.

Is the question is "The welding is done without following a WPS having  PWHT and actually the joints need the same" is it?

May I know the material ?

Also if it is of Carbon Steel material, is PWHT requirment is there based on design or based on ASME 31.3?

Regards,

Hareesh K V

On Mon, 27 Jan, 2025, 11:57 am Prakash Kumar Bontra, <prakashbontra@gmail.com> wrote:
For furnace PWHT as per ASME B 31.3 all the joints in the spool (1" to 36") need PWHT approved WPS and where to refer?

Prakash Bontra

--
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/CANeLWoNy0URXS9X7TEvvZRVe4V-1LNPKwidHJ097fDyPAjyh7Q%40mail.gmail.com.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to a topic in the Google Groups "Materials & Welding" group.
To unsubscribe from this topic, visit https://groups.google.com/d/topic/materials-welding/oPoxrZeCuSA/unsubscribe.
To unsubscribe from this group and all its topics, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/materials-welding/CAEv1fk_qTuLX3BbXwWEmjZYkHEKJg5fYEQ4n3tV28CtXxXG8DA%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/CANeLWoNcLHBndkp%3DRS5noKQnJLek4y7Ku9xuQHgAK7-WcZJ%2B4A%40mail.gmail.com.

Comments

Popular posts from this blog

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

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, ...

Materails FAQs

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...

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

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...