What type of tag must be permanently attached to a metallic hose?

The requirement for a manufacturer's tag to be permanently attached to a metallic hose stems from safety and compliance standards. The manufacturer's tag provides essential information regarding the hose's specifications, including its construction material, size, maximum pressure rating, and certification details. This is crucial for users and inspectors to ensure that the hose is appropriate for the intended application, particularly in systems involving substances like compressed natural gas (CNG), where safety and proper functioning are paramount.

A manufacturer's tag also often includes necessary information about the hose's operational limits and guidelines. This documentation helps ensure that users adhere to safety protocols and use the hose correctly, reducing the risk of accidents or failures. In regulatory contexts, this tag serves as evidence that the hose meets the industry standards and regulations at the time of manufacturing, which is vital for maintaining safe operations.

While other tags, such as owner's or inspection tags, may serve specific purposes, they do not provide the comprehensive and critical information that the manufacturer's tag does. Federal tags might relate to compliance with government regulations but do not serve the specific function of detailing the hose's characteristics. Therefore, having a manufacturer's tag permanently affixed is a key part of ensuring safety and compliance in the use of metallic hoses in CNG applications.