What marking must be on an LHG transfer hose that is suitable for more than 1 LHG product?

A permanently attached metal plate indicating suitability is essential for an LHG (Liquefied Hazardous Gas) transfer hose that is intended for use with more than one type of LHG product. This marking is crucial because it provides clear, durable information about the hose's compatibility with various substances, ensuring that operators are aware of its proper use and limitations.

This type of marking helps prevent hazardous situations that may arise from using the hose with an inappropriate substance. The permanent nature of the metal plate ensures that the information remains intact and legible over time, which is vital in maintaining safety and compliance with regulatory standards in hazardous material transfer operations.

Other options, such as a paper label or plastic tag, do not provide the same level of durability or reliability, making them less suitable for the demands of safe LHG transfer operations. Additionally, having no specific marking would fail to communicate critical safety information and could lead to mishandling of the hose and increased risk of accidents.