Flexible nonmetallic hoses may be used in which of the following scenarios?

Flexible nonmetallic hoses are particularly suited for use in construction sites or emergency indoor repairs due to their lightweight nature and ease of handling. In temporary settings where quick deployment and flexibility are required, nonmetallic hoses can provide necessary functionality for transporting gases like LPG or CNG without the need for extensive installation work typical of rigid pipes.

These hoses are designed for flexibility and mobility, making them ideal for scenarios where the configuration of the system may need to change frequently or where space is limited. They can easily accommodate movement and adjustments needed during emergency situations or in dynamic construction environments.

In contrast, long-term pipeline installations and permanent structural connections typically require more durable and robust materials that can withstand higher pressures and provide enduring stability, which is not the primary advantage of nonmetallic hoses. Emergency outdoor repairs may also necessitate more robust solutions that can handle exposure to environmental factors.