Which property is true for Polyethylene (PE) pipe used in irrigation?

• A. Very brittle in cold
• B. Good low-temperature impact resistance
• C. Aging resistant
• D. Poor chemical resistance

Answer: (B)

Polyethylene irrigation pipe is valued for its toughness and ability to stay ductile in cold conditions. This means it can absorb impacts and resist cracking when buried, subjected to frost, or bumped by rocks and equipment in the field. That resilience at low temperatures is why good low-temperature impact resistance is a defining and reliable property for PE pipe in irrigation systems.

PE achieves this because its polymer structure allows it to bend and deform rather than snap under stress, especially in the common HDPE grades used for irrigation. In contrast, statements about aging resistance are not as strong a fit, since aging can occur with UV exposure, heat, and oxygen unless stabilizers are used. And PE actually offers excellent chemical resistance to many agricultural chemicals, so describing it as having poor chemical resistance isn’t correct. It is also not very brittle in cold; it remains tough rather than cracking in low temperatures.