Heat Input Calculation

[jzmx]

We have GMAW machined welding equipment with pulsed amperage power sources, wire feeder, travelling system and ADM (arc data monitor). The PQR and WPS were qualified with heat input calculated per QW-409.1 (a) Voltage x Amperage /Travel Speed where A was actually average amperage based on 25k samples per second at the power source output. The instanteneous heat input can be calculated and displayed during the welding. There are sensors for voltage, amperage, wire feed speed and travel speed.

The ASME IX edition since 2010, requires an external power or energy meter for the waveform controlled machine, including plused GMAW, per new QW-409.1 (c) energy / weld bead length or power x arc time / weld bead length.

Does the existing GMAW welding equipment meet the new code requirements?

Regards
Jimmy

 

[SJones]

Maybe ask in the Welding Bonding Fastener Engineering forum, or the ASME (Mechanical) Code Issues forum (only one please). If you do post again, please update this thread to alert people. Thanks.

Steve Jones
Corrosion Management Consultant

http://www.linkedin.com/in/drstevejones

All answers are personal opinions only and are in no way connected with any employer.