Do carbon steel pipes need to be coated with a protective layer?

Carbon steel pipes require protective coating.
The service life of carbon steel pipes has a lot to do with the environment in which it is used. If it is used outdoors without a protective layer, it will soon perforate. But if it is used indoors and is coated with a protective layer such as epoxy resin, it will It can be used for a long time.
Carbon steel seamless steel pipe is a long steel material with a hollow cross-section and no seams around it. The protective coating can extend the service life of the carbon steel pipe.