WHILE ATTEMPTING TO ADJUST OXYACETYLENE PRESSURES FOR USE WITH A #8 ROSEBUD TIP TO HEAT AND REMOVE A FAN FROM A STRAIGHT SHAFT, THE OXYGEN LINE BLEW UP AND SET EE'S CLOTHING ON FIRE JUST ABOVE THE WAISTLINE. THIS CAUSED A 1 SQ/FT OF HIS ABDOMEN TO RECEIVE 2ND DEGREE BURNS AND HE WAS TRANSPORTED TO THE HOSPITAL FOR TREATMENT.