[MW:10476] RE: 10474] Weaving

Dear Sampath,

 

I assume you are using ASME as specification? In such case it of course fully depends on if notch toughness tests are required (ASME section IX QW-251.2). If required the heat input is a supplementary essential variable and you may only accept deviations in heat input according to QW-409.1. If not than you may accept such but I in generally don’t not accept any deviations +/- 25 % outside the HI used during WPS qualification without requiring new WPS qualification, but that is my own vision and not written in the specification.

 

Met vriendelijke groeten / Best Regards

 

Herman Pieper

 

Pieper Quality Support & Inspection

Phone: +31 (0)521 380083

Fax:     +31 (0)84 7539225

Cell:     +31 (0)6 51691215

www.pieper-qsi.nl

 

Van: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] Namens Sampath Kumar
Verzonden: donderdag 24 maart 2011 7:31
Aan: materials-welding@googlegroups.com
Onderwerp: [MW:10474] Weaving

 

Dear Friends,

 

WPS says the weaving is allowed/permitted 3times the diameter of the electrode.Please tell me wheather we can allow if the weaving is more than the allowable limit.If it can be allowed.What is the reasons and on what basis it is allowed?If it can not/should not be allowed.Why and what is the reasons?

 

My opinion is that it should not be allowed.[1]Because it deviates from the WPS.[2]properties may vary because of the excess heat In put due to excess weaving.

 

The contractor is of opinion that they will change the WPS to suit excess weaving.It is not an essential variable,hence it can be allowed.To substantiate their claim they say they will change the WPS and they will perform Hardness Test to prove that the properties were not changed.

With Best Regards

Sampath

 

 

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