Skip to main content

Re: [MW:7492] ASME sec 9 (QW 452 & 351 & QW 306) doubt

Dear All
Pl clear me about following
 
as per QW 306,

(Two or more welders or welding operators,

each using the same or a different welding process,

may be qualified in combination in a single test coupon.

For combination qualifications in a single test coupon, the

limits for thicknesses of deposited weld metal, and bend

and fillet testing are given in QW-452 and shall be considered

individually for each welder or welding operator for

each welding process or whenever there is a change in an

essential variable.)

I have to qualify for each process as per QW 451 thickness limits.

I have to mention that thickness range for each process in seprate like if my job is 7.11mm, to mention that, 8mm for rootGTAW & 6.11mm for filler SMAW as thickness range qualified, am i correct?

& one more doubt, that is.. process is single(SMAW), Filler metals r different one is E6010 root(F.No.3) & E7018 filler(F.No.1),

 Test piece is 6" 7.11 mm thik

either i have to mention in wps, that thcikness range qualified for two filler metal for root & filler pass is to be in seprate(like 8 & 6.11mm) or can i mention 14.22mm as single? pl clear me...

 Thanks & Regards
M
On Fri, Oct 8, 2010 at 12:05 PM, Bathula Raghuram (Mumbai - PIPING) <R.Bathula@ticb.com> wrote:

An interpretation applies either to the Edition and Addenda in effect on the date of issuance of the interpretation or the Edition and Addenda stated in the interpretation. Subsequent revisions to the Code may supersede the interpretation.

 

For e.g. part 3 this interpretation refers to QW404.28, QW404.11, QW404.15, and QW404.16 , except QW404.15 remaining paras are not exist in the current edition.

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Sreejith
Sent: Friday, October 08, 2010 12:43 PM
To: materials-welding@googlegroups.com
Subject: [MW:7445] ASME sec 9 (QW 452 & 351) doubt

 

Dear all,
               I came across the interpretation of Sec 9 issued by ASME on year 1988. The question was

            A performance qualification groove weld test coupon has been successfully made by a welder on a  ¾ " thick test coupon using transverse bend tests in accordance with QW-452. The test weld was made with one process, utilizing filler metals of two different F-numbers. Is the deposited weld metal thickness qualified, for each of the F-number filler metals used in qualification, "max . to be welded". (Interpretation: IX-89-02  issued date OCT 6, 1988)

The answer given by the committee is YES .

Anybody agreeing with this answer?If yes please give the relevant statements in ASME sec 9 supporting that. 

Is this answer true if interpretation is as per ASME sec 9 2007 Ed ?


- Sreejith -


--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

Comments

Popular posts from this blog

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...

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...