THE INJRED EE WAS WORKING OUT OF A CRANE MANBASKET REPAIRING A FLANGE ON A WATER COOLING LOOP. HE ASKED HIS PARTNER TO HAND HIM ANOTHER BOLT FOR THE FLANGE, AND AS HIS PARTNER REACHED OUT TO H AND IT TO HIM HE LEANED AGAINST AN ACID LINE CAUSING IT TO START LEAKING AT THE NIPPLE TO THE FLOW METER. ANOTHER MECHANIC THEN TRIED TO SHUT THE ACID OFF AT THE VALVE, WHICH CAUSED THE NIPPL