For irrigation pipes: the plastic pipe industry is dominated by polyvinyl chloride (PVC-U) pipes, polyethylene (PE) pipes, and polypropylene (PP-R) pipes.

PE pipe is more ideal
The standard product of PE pipe is black with a sky-blue band on the outer wall. It has just been recognized by the society in the past ten years. Its outstanding advantages are that it has "toughness" and "flexibility" and is not easy to be damaged. When a car drives over it, it will not be damaged. It can be restored to its original shape, can adapt to complex terrain, saves elbows, joints, and other accessories, and is relatively low-priced. It has a theoretical lifespan of 50 years when buried underground. It is currently the most ideal sprinkler and drip irrigation pipe material.

PVC-U pipe has shortcomings
PVC pipes have been a common pipe material for the past 20 years and are available in white and gray. Its advantages are low price, complete specifications of pipe accessories, can be connected with glue, and easy installation. However, its shortcoming is that it is "hard" and "brittle", so it is said to be a fly in the ointment. It has been gradually replaced by PE pipes in pressure pipeline systems.

PP-R pipe is not suitable for use
PP-R pipes are generally white, inlaid with blue or red lines, and the pipe wall is very thick. One of its characteristics is that it has "thermal properties" and the operating temperature can reach 120°C. It is only used for hot and cold water pipes; Second, it has "cold brittleness" and is the most expensive among the three plastic pipes. Therefore, if PP-R is used in a sprinkler and drip irrigation system, it is used in the wrong place.

Steel pipes are only used on bare ground
The advantage of steel pipes is their high strength, but the disadvantages are that they are "corrosive", which affects water quality, and have a short lifespan. They are also expensive. For pipes with a diameter of 110mm and below, the price of steel pipes is more than 2 times higher. Therefore, galvanized steel pipes are used only for local pipes that cannot be buried underground. Galvanized steel pipes are divided into hot-dip and cold-dip. In comparison, hot-dip pipes have better corrosion resistance because the zinc molecules in the coating are densely arranged and "penetrate" the iron molecules deeper. Therefore, hot-dip pipes should be preferred, despite the price. Slightly higher.

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