For which processes is the flux type typically identified in the WPS?

For which processes is the flux type typically identified in the WPS?

• A. Processes such as SAW, electroslag and electrogas.
• B. SMAW and TIG only.
• C. MIG and FCAW without flux.
• D. Plasma cutting.

Answer: (A)

Flux type in a Welding Procedure Specification is specified for processes that rely on a separate flux material to protect the weld and influence its chemistry. Submerged arc welding uses a granular flux that blankets the arc and forms slag, so the exact flux composition must be identified in the WPS. Electroslag welding depends on flux-related materials to create the slag pool and electrolyte environment that drive the weld, making the flux specification essential. Electrogas welding also involves flux-related materials that affect arc behavior and slag formation, so the flux type is typically listed there as well. In contrast, methods that don’t rely on an external flux—such as welding with solid filler wire under a shielding gas or processes like TIG—do not require a flux type to be specified in the WPS, and plasma cutting isn’t a welding process, so flux isn’t identified there.

Flux type in a Welding Procedure Specification is specified for processes that rely on a separate flux material to protect the weld and influence its chemistry. Submerged arc welding uses a granular flux that blankets the arc and forms slag, so the exact flux composition must be identified in the WPS. Electroslag welding depends on flux-related materials to create the slag pool and electrolyte environment that drive the weld, making the flux specification essential. Electrogas welding also involves flux-related materials that affect arc behavior and slag formation, so the flux type is typically listed there as well.

In contrast, methods that don’t rely on an external flux—such as welding with solid filler wire under a shielding gas or processes like TIG—do not require a flux type to be specified in the WPS, and plasma cutting isn’t a welding process, so flux isn’t identified there.