Mich. Admin. Code R. 29.7020

Current through Vol. 24-24, January 15, 2025

Section R. 29.7020 - Containers

Rule 20. Section 2-1.3 is reproduced from NFPA 50A, and sections 2-1, 2-1.1, 2-1.2, and 2-1.4 to 2-1.8.2 of the storage and handling of gaseous and Liquefied H₂ code are added as follows:

2-1 Containers.

2-1.1 H₂ containers shall comply with 1 of the following:

(a) Designed, constructed, and tested in accordance with appropriate requirements of ASME International, "Boiler and Pressure Vessel Code," Section

VIII, "Rules for the construction of pressure vessels, " adopted by reference in section 8-1.

(b) Designed, constructed, tested, and maintained in accordance with Title 49, CFR.

(c) Metal hydride storage systems shall be listed for the application and designed in a manner that prevents the removal of the metal hydride.

(d) When allowed by the department, fully over-wrapped carbon composite containers designed to a standard acceptable to the department based on the best interest of public health, safety, and the environment.

2-1.2 Permanently installed aboveground containers shall be provided with substantial supports, constructed of noncombustible material on firm foundations of noncombustible material, and shall comply with the following subsections as applicable:

(a) Steel supports in excess of 18 inches (45.72 centimeters) in height, shall have a minimum 2-hour fire resistance rating, see figure 2-1.2.

Exception: Supports may be greater than 18 inches (45.72 centimeters) if owner demonstrates, to the satisfaction of the department, that the container will not be exposed to a 2-hour pool fire.

(b) If a permanently installed aboveground container is in an area that is subject to buoyant forces, provision shall be made to prevent the container, either full or empty, from floating during a rise in water level, including up to the established maximum flood stage.

(c) Horizontally installed containers shall have not more than 2 points of support longitudinally or other methods approved by the department based on the best interest of public health, safety, and welfare and the environment.

(d) Horizontally installed containers shall not be in direct contact with each other.

(e) Composite containers shall be protected from UV radiation as required in the manufacturer's specifications.

(f) Aboveground containers shall be protected by painting or other equivalent means where necessary to inhibit corrosion.

Exception: Composite containers shall not be painted without prior permission from the container manufacturer.

(g) Welding or brazing for the repair or alteration of an ASME pressure vessel shall comply with the standard adopted in section 8-1.2.1.

(h) Other welding or brazing shall be permitted only on saddle plates, lugs, or brackets which are attached to the pressure vessel by the pressure vessel manufacturer.

(i) The exchange or interchange of pressure vessel appurtenances intended for the same purpose shall not be considered a repair or alteration and appurtenances must comply with these rules.

Figure 2-1 .2______

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2-1.3 Each portable container shall be legibly marked with the name hydrogen in accordance with ANSI/CGA C-4, Method of Marking Portable Compressed Gas Containers to Identify the Material Contained. Each manifold hydrogen supply unit shall be legibly marked with the name hydrogen or a legend such as "This unit contains hydrogen."

2-1.4 An owner or operator that has had a container subjected to heat exposure due to fire shall remove the container from service, unless the owner or operator provides documentation of recertification in accordance with section 2-1.1, to the department substantiating container integrity.

2-1.5 Guard posts or other approved means shall be provided to protect a container system subject to vehicular damage. When guard posts are installed, all of the following design specifications shall be met:

(a) Guard posts shall be constructed of steel not less than 4 inches (10.16 centimeters) in diameter and shall be filled with concrete.

(b) Guard posts shall be spaced not more than 4 feet (1.2 meters) on center.

(c) Guard posts shall be set not less than 4 feet (1.2 meters) deep in a concrete footing that is not less than 15 inches (38.1 centimeters) in diameter.

(d) Guard posts shall be not less than 4 feet (1.2 meters) in height above grade.

(e) Other means as approved by the department based on the best interests of public health, safety, and welfare and the environment.

2-1.6 Physical protection. Containers, piping, valves, pressure-relief devices, regulating equipment, and other appurtenances shall be protected against physical damage and tampering.

2-1.7 Portable containers subject to shifting or upset shall be secured. Nesting may be used to secure portable containers.

2-1.8 Underground containers. Underground containers for the storage of gaseous H₂ shall be in accordance with this subsection.

2-1.8.1 Construction. Storage containers for gaseous H₂ shall be designed and constructed in accordance with Section VIII of ASME International, "Boiler and Pressure Vessel Code," adopted by reference in section 8-1, and shall be vacuum-jacketed in accordance with section 2-1.10.1.1.

2-1.8.2 Corrosion Protection. The underground container shall be protected by an engineered corrosion protection system designed by a corrosion expert. If cathodic protection is used the maintenance schedule shall meet the requirements of section 5-4.

Mich. Admin. Code R. 29.7020

2008 AACS