[MW:12338] Re: If Dia of Filler Rod changes what would be Volts , Amps & Travel Speed

Dear Abraham,
As per section IX,
1) Heat input is only essential Variable when impact test (Toughness
test) Requirement , if you change current, Ampes and Travel speed as
per your convenient for welding. No need to qualify new PQR for same
parameter. you just refer clause QW 251.3.
You can change parameter and weld with 4.o dia meter wire there is no
need to restrict the electric parameter.
Regards
Vijay

On Aug 18, 10:47 pm, abdul khan <abdul_khan2...@yahoo.co.in> wrote:
> Dear Abhram,
>  
> Current calculation for different size of electrode the formula is
>  
> Current = ( Size of Electrode  x 40 ) ± 20.
>  
> Eg. 3.2 X 40 = 128 ± 20 Amps
>  
> Regards.
> A.J.Khan
>
> --- On Thu, 18/8/11, Abraham <QIS-...@hdec.co.kr> wrote:
>
> From: Abraham <QIS-...@hdec.co.kr>
> Subject: [MW:12260] If Dia of Filler Rod changes what would be Volts , Amps & Travel Speed
> To: materials-welding@googlegroups.com
> Date: Thursday, 18 August, 2011, 7:28 AM
>
> Dear all
>  
> I need to make a WPS as per ASME SEC IX & Construction Code is ASME B31.3
>  
> PQR :  12" 42 THK 
> Material :  SA335 P22
> Process :  GTAW + SMAW
>  
> Actual Filler Wire Used in PQR  : 3.2 mm  Dia Rod  ( Amps : 100 ~ 125  , Volts : 23 ~ 26 , Travel Speed : 10 ~ 15 Cm / Min )
>  
> But in our site we are using 2.4mmm , 3.2 mm , 4.0 mm Dia Filler Rods
>  
> I want to make a WPS mentioning Current , Volt  , Travel speed for this 2.4 mm & 4.0 mm Rod also .
>  
> What basis  and Which clause I can get consequent A , V & TS  ?  
>  
>  By below clause we can support our WPS but cant get the value for A , V & TS .
>                                              
>                                                (i) 404.3 Change in Size of Filler metal is Non Essential Variable
>                                                (ii) 409.8 Change in I & E Range is an Non Essential Variable
>                                                (iii ) 409.1  Heat input increase in Supplementary Essential Variable . My case no need Impact Testing
>  
>  
> Thanks and Regards
>  
> A.P.Abraham ,
> Qatar .
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