Re: [MW:29467] 40 mm root gap

It was an error in the survey

--

Regards,

Arun Padman Manayil

On Fri, Apr 5, 2019, 15:07 chandraknat vaidya <vaidyac10@gmail.com> wrote:

Why 40 mm gap is reqd.?

On Thu, Apr 4, 2019 at 5:25 PM Ramin Kondori <raminkondori@gmail.com> wrote:
A WPS with 40mm root gap and 10mm base metal is not something you expect to be approved...
This must be the fault of design or cutting plan or cutting operations etc.

The first option that should be investigated is whether the plate can be used in a different location. Refer to the shop drawings and material cutting sheets to study this alternative.
Another possibility, assuming material is available, is splicing on material by butt-welding. The weld must be reflected in the shop drawings and meet D1.1 quality criteria.
If none of these are feasible, the piece may have to be replaced.

You can cut back your structural member and then weld a piece so that the final assembly is within the weld joint dimensional tolerances (this weld shall be CJP). This is the industry practice for such wide root gaps.

Regards
Ramin Kondori
Sr. QA/QC & Welding Engineer
-----------------------------------------------------------
PG-Dip. in Welding Engineering (IWE AT 0070)
BSc. in Civil Engineering (IUT)
BGAS Painting Inspector
ASNT Level I&II

On Thu, Apr 4, 2019 at 3:23 PM Arun Padman <arunpadman0105@gmail.com> wrote:
Dear All,

I have a situation in which I need to qualify a WPS with 40mm root gap and 10mm base metal,

But the client is not ready to allow us to conduct the PQR, he need a technical clarification before we conduct PQR,

Is it allowed to weld 40 mm root gap with backing plate as per AWS D1.1, please help me.

Regards,

Arun Padman Manayil
P Save a tree. Please don't print this e-mail unless you really need to

--
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.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

--
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.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

--
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.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

--
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.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

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

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...

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...

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...

Materials & Welding

Search This Blog