What additional requirement must metallic hose have for marking?

Metallic hoses are critical components used in various applications, particularly in systems involving compressed natural gas. For safety and regulatory compliance, these hoses must meet specific marking requirements. A permanently attached manufacturer's tag is essential because it provides vital information about the hose, including specifications, material, pressure ratings, and compliance with safety standards.

This marking serves multiple purposes: it aids in the identification of the hose for maintenance and inspection, ensures that operators are aware of the maximum pressure limits, and allows for verification against industry regulations and standards. The information on this tag also helps in quickly assessing whether the hose is suitable for a particular application, which is especially important in ensuring safety in environments where high-pressure gases are involved.

Other marking options, such as permanent ink or basic labels, may not provide the comprehensive information necessary for safety and regulatory compliance. Therefore, the requirement for a permanently attached manufacturer's tag is crucial for both safety and reliability in the operation of systems utilizing metallic hoses.