EEMUA 158 2

[metalmichie]

I'm hoping someone can shed some light on this.

We currently have weld procedures qualified in accordance with EEMUA 158 and approved by DNV. As part of 158 the wire feed speed is an essential variable but our WPS’s and PQR’s have columns for WFS but they have not been recorded.
What I would like to know is is there a calculation to work out the WFS governed from Amps and Volts and wire diameter?

Any help would be greatly appreciated..

 

[Goahead]

You may try to use the Weld Calculator

http://www.millerwelds.com/resources/calculators/mig_solid_amperage_calculator.php

http://www.welding-advisers.com/

 

[gtaw]

The short answer is no.

The welding current is a function of the electrode extension (resistance), the wire feed speed, and the shielding gas used.

The other fly in the ointment is the fact that the values recorded on the PQR are "actual" values. Them must be recorded at the time the test assembly is welded. Filling in the blanks after the fact is know in some circles is called "pencil whipping." The entries made after the test coupon is welded and documented invalidates the PQR. Since the PQR is a legal document, pencil whipping the PQR is a fraudulent act. It invalidates the WPS and any welders qualified using the WPS.




Best regards - Al

 

[metalmichie]

Thanks for your help it's greatly appreciated.

 

[DekDee]

metalmichie,
I would be asking for your money back from DNV.
If it is an essential variable and it is not even noted on the PQR how can anyone possibly approve it - let alone a notified body ?
You pay for reputable organisations to review and approve your welding documentation - only to find out now it is not worth the paper it is printed on.
Regards,
DD