R 408.11221
R 408.11221 Cylinder marking.
Cite as Mich. Admin. Code R 408.11221
Rule 1221. (1) Compressed gas cylinders shall be legibly marked, for the purpose of
identifying the gas content, with either the chemical or trade name of the gas. Such
marking shall be by means of stenciling, stamping, or labeling, and shall not be readily
removable. Whenever practical, the marking shall be located on the shoulder of the
cylinder.
(2) Unlabeled cylinders shall not be used.
(3) Empty cylinders shall be so marked at time of depletion.