Section 408.16351. Acid rooms, acid towers, and acid tanks.

(1) During inspection, repairs, or maintenance of acid towers, the employees shall be provided with eye protection, a supplied air respirator, a safety belt, and an attached lifeline. The line shall be extended to an attendant stationed outside the tower opening. Personal protective equipment as prescribed in General Industry Safety Standard Part 33 “Personal Protective Equipment,” as referenced in R 408.16302, shall be worn.

(2)  Walkways, stairs, and other equipment in acid rooms, acid towers, and acid tanks shall be inspected monthly for corrosion and replaced or repaired where any part shows a defect affecting employee safety.

(3)   Where hoops are used on acid tanks, they shall be made of rods rather than flat strip stock and shall be inspected and maintained as prescribed in subrule (2) of this rule.

(4)   Pressure tanks-accumulators shall be inspected semiannually as prescribed in the ASME Boiler And Pressure Vessel Code, Section VIII, “Unfired Pressure Vessels,” 1989 with addenda, as adopted in R 408.16302.

(5)   When lead burning is performed within tanks, fresh air shall be forced into the tanks so that fresh air will reach the face of the employee first and the direction of the current will never be from the source of the fumes toward the face of the employees. Supplied   air   respirators   (constant-flow   type)   shall   be    provided   as   required   in

Occupational  Health  Standard  Part  451  “Respiratory  Protection,”  as  referenced   in R 408.16302.

History: 1979 AC; 1993 AACS; 2014 AACS.