Safety Procedures & Troubleshooting Flashcards

What troubleshooting action should be taken when SAW consistently produces a weld with excessive convexity (high crown)?

Answer: Reduce amperage, increase voltage, or increase travel speed to flatten the bead profile

Excessive weld convexity in SAW is reduced by lowering amperage, raising voltage, or increasing travel speed to spread the molten pool more broadly.

During SAW on a rotating pipe section, the weld shows consistent burnthrough at the 6 o'clock position. What is the most likely cause?

Answer: Rotational speed too slow, causing excessive heat buildup at the bottom of the pipe

Burnthrough at the bottom of a rotating pipe weld indicates the rotational speed is too slow, allowing excessive heat accumulation in the gravity-affected puddle zone.

A maintenance technician notices the SAW wire feeder drive rolls are slipping intermittently. What safety and quality risk does this present?

Answer: Inconsistent wire feed causes arc interruptions, potential burnback, and contact tip fusion that can damage equipment

Slipping drive rolls cause wire feed surges and stoppages that lead to burnback where the wire fuses to the contact tip, damaging equipment and creating quality defects.

What is the correct method for safely disposing of used SAW flux that contains high levels of metallic fines and oxides?

Answer: Dispose of used flux according to local hazardous waste regulations and the flux SDS recommendations

Used SAW flux containing metallic compounds may be classified as hazardous waste; disposal must follow the Safety Data Sheet guidance and applicable environmental regulations.

During SAW operation, the operator observes the flux is not completely covering the arc and small flashes of light are visible. What immediate action is required?

Answer: Stop welding and increase flux flow rate before resuming to ensure full arc coverage

Visible arc flashes during SAW mean the arc is not fully submerged, exposing operators to UV radiation and producing an unshielded weld; welding must stop until flux coverage is restored.

An SAW procedure requires preheating thick carbon steel plate to 300°F minimum. How should the preheat temperature be verified before welding begins?

Answer: Using a calibrated contact pyrometer, temperature-indicating crayon, or infrared thermometer at the specified distance from the weld joint

Preheat temperature must be verified with calibrated instruments — not by visual or tactile methods — to ensure it meets WPS requirements before welding.

When troubleshooting longitudinal cracking in the center of an SAW weld bead, which factor is most likely the root cause?

Answer: High sulfur or phosphorus content in the base metal combined with a concave bead profile causing solidification cracking

Centerline solidification cracking in SAW is typically caused by high impurity (S/P) content in the base metal combined with a concave bead shape that concentrates solidification stresses at the center.