Common pressure ratings for PE irrigation pipes usually include 0.25MPa, 0.4MPa, 0.6MPa, 0.8MPa, 1.0MPa, 1.25MPa, and 1.6MPa, etc.

The specific pressure grade selected depends on various factors, such as the design requirements of the irrigation system, topographical differences, pipe length, water source pressure, and the water requirements of the crops being irrigated.

Generally, for flat terrain, shorter pipelines, stable water pressure, and moderate requirements for irrigation uniformity, lower pressure grade PE irrigation pipes can be chosen. Conversely, in complex terrain, longer pipelines, fluctuating water pressure, or higher requirements for irrigation uniformity, higher pressure grade PE irrigation pipes are often necessary.