What information must be legible on the nameplate of an LP-gas container constructed before September 1, 1984?

The nameplate of an LP-gas container constructed before September 1, 1984, must include key information such as the manufacturer's name, the serial number of the container, the working pressure, and the water capacity. This requirement is crucial for ensuring safety and traceability. The manufacturer's information provides a point of contact for any inquiries regarding the container's specifications or any potential issues. The serial number allows for unique identification of that specific container, aiding in maintenance records and recalls if necessary.

The working pressure is critical for safe operation, as it defines the maximum pressure the container can handle without risk of failure. The water capacity indicates the volume of liquid that the container can safely hold, which is important for determining the amount of liquefied gas it can store. All this information contributes to safe handling and compliance with industry regulations, allowing users to properly assess whether the container is suitable for their needs and to verify that it meets applicable safety standards at the time of its construction.

Other options, while they may pertain to operational aspects of LP-gas systems, do not represent required information on the nameplate for containers from that specific construction period.