Manufactured assemblies employing flexible hose shall not be labeled with which of the following?

• A. Date of installation
• B. System name or symbol
• C. Standard pressure
• D. Color code

Answer: (C)

Labeling of manufactured flexible-hose assemblies focuses on identification, traceability, and gas recognition. The date of installation provides a maintenance and replacement reference, ensuring hoses are inspected or replaced on schedule. The system name or symbol ties the hose to a specific gas distribution network or area, helping staff trace where the hose belongs within the facility. The color code gives an immediate visual cue to which gas is being delivered, reducing the risk of cross-connection or misadministration.

labeling the standard pressure would not be appropriate because operating pressures can vary by gas type and part of the system, and there isn’t a single universal “standard pressure” that applies to all flexible-hose assemblies. The actual pressure information is defined elsewhere in system documentation, not on the hose label.