Packaging marked as shown in this column or of the same type with higher service pressure must be used, except as provided in §§ 173.301(l), 173.301a(e), and 180.205(a) Maximum permitted filling density (percent) Manifolding is authorized for cylinders containing the following gases: Valves and pressure relief devices on manifolded cylinders filled with a compressed gas must be protected from damage by framing, a cabinet or other method. In addition, for Division 2.1 (flammable gas) material, the pressure relief devices (PRDs) must be arranged to discharge upward to prevent any escaping gas from contacting personnel or any adjacent cylinders. ![]() Pressure relief devices on manifolded horizontal cylinders filled with a compressed gas must be arranged to discharge unobstructed to the open air. The pressure relief devices selected for the manifolded unit must have been tested in accordance with CGA S–1.1 and CGA S–7. Each cylinder must be individually equipped with a pressure relief device as required in paragraph (f) of this section, except that pressure relief devices on manifolded horizontal cylinders that are mounted on a motor vehicle or framework may be selected as to type, location, and quantity according to the lowest marked pressure limit of an individual cylinder in the manifolded unit. Manifold branch lines must be sufficiently flexible to prevent damage to the valves that otherwise might result from the use of rigid branch lines. Except for Division 2.2 materials, each cylinder must be equipped with an individual shutoff valve that must be tightly closed while in transit. Manifolded cylinders must be supported and held together as a unit by structurally adequate means. (1 ) Cylinder manifolding is authorized only under conditions prescribed in this paragraph (g). View on this date view change introduced compare to most recent Nitrogen dioxide, liquefied, or dinitrogen tetroxide, liquefied. Organic phosphates mixed with compressed gas. ![]() UN Portable Tank Table for Liquefied Compressed Gases and Chemical Under Pressure.Ĭompressed gases in tank cars and multi-unit tank cars.Ĭompressed gases in cargo tanks and portable tanks. ![]() General requirements for shipment of compressed gases and other hazardous materials in cylinders, UN pressure receptacles and spherical pressure vessels.Īdditional general requirements for shipment of specification cylinders.Īdditional general requirements for shipment of UN pressure receptacles.įilling of cylinders with nonliquefied (permanent) compressed gases or adsorbed gases.Īdditional requirements for shipment of nonliquefied (permanent) compressed gases in specification cylinders.Īdditional requirements for shipment of non-liquefied (permanent) compressed gases in UN pressure receptacles.Īdditional requirements for the shipment of adsorbed gases in UN pressure receptacles.Ĭharging of cylinders with compressed gas in solution (acetylene).įilling of cylinders with liquefied compressed gases.Īdditional requirements for shipment of liquefied compressed gases in specification cylinders.Īdditional requirements for shipment of liquefied compressed gases in UN pressure receptacles.Ĭharging of cylinders with a mixture of compressed gas and other material.
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