Mich. Admin. Code R. 29.7079

Current through Vol. 24-21, December 1, 2024

Section R. 29.7079 - Containers

Rule 79. Sections 2-1 to 2-1.10.1.3 and figure 2-1.2 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 the following.

(a) Storage containers shall be designed, constructed, and tested in accordance with appropriate requirements of the ASME "Boiler and Pressure Vessel Code," section VIII, "Rules for the Construction of Pressure Vessels," adopted by reference in section 8-1.

(b) Portable containers shall be designed, constructed, and tested in accordance with title 49 CFR.

(c) 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.

(d) 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.

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

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

(a) Steel supports in excess of 18 inches (46 centimeters) in height shall be protected with a protective coating having a 2-hour fire resistance rating, see figure 2-1.2.

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

(f) Temperature effects. Foundations or supports that could come in contact with the cryogenic fluid in the event of a spillage, such as at fill connections, and flanges, shall be constructed of materials that are capable of withstanding the cryogenic temperature effects, such as concrete and stainless steel.

(g) Excessive loads. Stationary containers shall be supported to prevent the concentration of excessive loads causing differential settlement of the support system.

(h) Expansion and contraction. Foundations for horizontal containers shall be constructed to accommodate expansion and contraction of the container.

(i) Support of ancillary equipment. Foundations shall be provided to support the weight of ancillary equipment such as vaporizers and/or heat exchangers.

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2-1.3 Marking. Liquefied H₂ containers and systems shall be marked in accordance with this section.

2-1.3.1 Portable containers. Portable containers shall be marked in accordance with CGA C-7, "Guide to the Preparation of Precautionary Labeling and Marking of Compressed Gas Containers," adopted by reference in section 8.

2-1.3.2 Stationary containers. Stationary containers shall be marked in accordance with NFPA 704, "Standard Systems for the Identification of the Hazards of Materials for Emergency Response," adopted by reference in section 8.

2-1.3.3 Identification of contents. Each container shall be marked as follows:

LIQUEFIED HYDROGEN - FLAMMABLE GAS in letters that are not less than 3 inches (7.62 centimeters) in height.

2-1.3.4 Container specification. Stationary containers shall be marked with the manufacturing specification and maximum allowable working pressure on a permanent nameplate in accordance with the standard to which the container was manufactured.

2-1.4 An owner or operator that has had a container subjected to heat exposure due to an engulfing fire, a fire in which at least 25% of the container surface is exposed, shall remove the container from service, and shall not return the container to service, unless the owner or operator provides documentation to substantiate mechanical and performance integrity of the container in accordance with section 2-1.1 to the department. Such documentation shall be issued by a qualified engineer.

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 shall be permitted as a means of securing portable containers.

2-1.8 Overfill protection and prevention systems. An approved means or method shall be provided to prevent the overfilling of storage containers.

2-1.9 Vacuum level monitoring. An approved monitoring method shall be provided to indicate vacuum degradation within the vacuum jacket(s).

2-1.10 Underground containers. Underground containers for the storage of liquefied H₂ shall be in accordance with this subsection.

2-1.10.1 Construction. Storage containers for liquefied H₂ shall be designed and constructed in accordance with section VIII of ASME "Boiler and Pressure Vessel Code," adopted by reference in section 8, and shall be vacuum-jacketed in accordance with section 2-1.10.1.1.

2-1.10.1.1 Vacuum jacket construction. The vacuum jacket shall be designed and constructed in accordance with section VIII of ASME "Boiler and Pressure Vessel Code," and shall be designed to withstand the anticipated loading, including loading from vehicular traffic, where applicable. Portions of the vacuum jacket installed below grade shall be designed to withstand anticipated soil, hydrostatic, and seismic loading.

2-1.10.1.2 Material. The vacuum jacket shall be constructed of stainless steel or other approved corrosion-resistant material.

2-1.10.1.3 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 5-3.

Mich. Admin. Code R. 29.7079

2008 AACS