How frequently should gas pipe or tubing be marked in feet?

The frequency at which gas pipe or tubing should be marked in feet is critical for identification and maintenance purposes. Marking the pipes helps in easily locating the gas line for inspections, repairs, or any necessary modifications. The standard practice in the industry typically calls for marking gas piping every 20 feet. This spacing allows for sufficient visibility to identify the placement and routing of the piping without excessive clutter from too many markings.

The other options suggest more frequent markings, but this might lead to confusion or unnecessary complexity in identifying the lines. A 20-foot marking interval strikes a balance between visibility and practicality, ensuring that the information is clear and accessible when needed. This standard is often guided by safety protocols and regulatory guidelines, contributing to effective monitoring and maintenance of gas systems.