Do the pipes of the sprinkler system need to be painted on the ceiling? Whether it s all or only

Regardless of whether it is in the ceiling or not, the fire hydrant system generally uses welded steel pipes, and the surface needs to be anti-corrosion, and at the same time, there must be color marking, so all are generally painted with red paint; One anti-rust paint, 2 red topcoats;

The spray system is generally made of hot-dip galvanized steel pipe, which is connected by grooves, so it generally does not need to be painted, and only serves as a functional identification of the pipeline.

The pipes of the fire sprinkler system are generally pickled hot-dip galvanized pipes. Like you said, you don't need to do paint. Ordinary paints such as alkyd paints will saponify when they are made. Of course, it is no problem to do epoxy resin paint once, and the anti-corrosion effect is also better.

If the pipe joint is welded butt, the galvanized layer will be destroyed. Generally, after polishing, the epoxy resin is made twice by hand.

As for color separation, the internal tube does not need to be separated, and it is standard practice to mark it with a ribbon at an interval of 2 meters.

To brush the paint, all brushes, not only as a color differentiation, but also as a surface protection, generally use red paint.

I guess it's only part of it.