EE WAS WELDING ON HAND RAIL ON VOLVO LOADER. EE STRUCK ARC BEFORE HOOD WAS FLIPPED DOWN. AS EE FLIPPED HOOD DOWN, IT HIT A PIPE NEAR HIS HEAD, AND THEREFORE DID NOT COMPLETELY CLOSE. EE HAD TO MOVE HEAD BACK TO CLOSE HOOD. THE EVENT PROBABLY TOOK 2-3 SECONDS. A FLASH BURN TO BOTH EYES RESULTED. EE RETURNED TO WORK ON HIS NEXT SCHEDULED SHIFT.