Ind. Admin. Code tit. 355, r. 3-2-3 – Markings on containers and systems

Sec. 3. (a) Each container or system covered in sections 4 through 7 of this rule shall be marked by the manufacturer as follows:

(1) With a marking identifying compliance with, and other markings required by the rules of the code under which the container is constructed.
(2) With the name and address of the supplier of the system, or the trade name of the system, together with the year of manufacture.
(3) With the capacity of the container in pounds or gallons, U.S. Standards.
(4) With the working pressure in psig for which the container is designed.
(5) With the wall thickness of the shell and heads.
(6) With a marking indicating the maximum level to which the container may be filled with liquid at liquid temperatures between twenty (20) degrees Fahrenheit and one hundred (100) degrees Fahrenheit, except on containers:
1. (A) provided with fixed maximum level indicators; or
2. (B) that are filled by weighing.
Markings shall be in increments of not more than twenty (20) degrees Fahrenheit and shall be located on the container dataplate or on a liquid level gauging device. Refrigerated storage tanks shall be exempt from this section but shall be marked to show the maximum permissible liquid level (see section 9(b) of this rule).
(7) With the outside surface area in square feet. Refrigerated storage tanks shall be exempt from this requirement.

(b) Marking specified as on the container shall be on the container itself or on a dataplate permanently affixed thereto.

(State Chemist of the State of Indiana; Agricultural Ammonia PT A, Sec II, Rule 2.3; filed Dec 30, 1965, 2:15 p.m.: Rules and Regs. 1966, p. 4; filed Jan 19, 2001, 2:04 p.m.: 24 IR 1627; errata filed Apr 24, 2001, 9:06 a.m.: 24 IR 2709; readopted filed Jun 20, 2001, 3:22 p.m.: 24 IR 3822; readopted filed Apr 27, 2007, 2:03 p.m.: 20070509-IR-355070039RFA; readopted filed Nov 25, 2013, 3:27 p.m.: 20131225-IR-355130482RFA; readopted filed Jul 2, 2019, 10:42 a.m.: 20190731-IR-355190258RFA; readopted filed Nov 4, 2025, 2:37 p.m.: 20251119-IR-355240619RFA)