Skip to main content

RE: [MW:7951] QW 423 & QW 424(P.no) conflicts.... Clear me.

By Materials & Welding

Good afternoon,

 

1)      Yes, any change of a P-number requires a new PQR and WPS

 

2)      No, you can weld all material that are of the same P-number with the your original PQR. Let’s say you used SA-516 Gr 70 to run your PQR using a GMAW/FCAW process. You would be able to weld SA-106 Gr B using the GMAW/FCAW process without running a new PQR.

 

3)      No, look at QW 423.1 if a welder qualified on any base metal in the left column they are qualified to weld on any base metal in the right column.  If a welder qualified  on a P1 material they would be able to weld P1 thru P15F, P34 and P41 thru P49 materials. But be aware of the filler metal F-numbers.

 

 

Example:

A welder is qualified on P 1 material using GTAW  E70S-2 (F6) and SMAW ER7018 (F4). The welder would be qualified to weld on P8 material but only in the GTAW ER316 (F6)  process, not the SMAW E316 (F5) due to the F-number being different from the F-numbers qualified.

 

Thank you,

Ken

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Engineer Mech
Sent: Saturday, October 30, 2010 8:25 AM
To: materials-welding@googlegroups.com
Subject: [MW:7947] QW 423 & QW 424(P.no) conflicts.... Clear me.

 

Dear All,

 

1)if P.no is changing, For example from P.no X to P.no Y, either we have to go for new WPS & new PQR or not, Clear me.. (Same Process)

 

&

2) If base material is changing within P.NO 1,  example, A106 to A36. Either i have to go for new PQR or not, & welder to be qualified for tat base material changing within P.no. 1 or not? (Same Process)

 

& 3) one welder got qualified in P.No X, is he only qualified to weld tat P.No only, am i correct or not... (Same Process)

 

Pl clear me about above three...

--
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

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