PP pipes are tubular products made from polypropylene (PP) as the main raw material, manufactured through processes like extrusion molding. They are among the most widely used plastic pipes available today, with common types including standard PP pipes and PP-R pipes. Coastal and rainy areas pose harsh challenges for piping—high salt in air/water, frequent heavy rains, high humidity, and strong winds—easily damaging traditional pipes (metal, concrete, ordinary plastic). PP pipes’ excellent weather resistance solves these issues, delivering reliable performance.​

PP pipes have strong salt corrosion resistance. Coastal air and groundwater’s chloride ions rust metal pipes and erode concrete, but PP is inert to chloride. It doesn’t react with saltwater or salt-laden air, avoiding corrosion, wall thinning, or leaks. Buried in salty coastal soil or conveying seawater for aquaculture, PP stays intact for decades, unlike metal pipes that rust through in 3–5 years.​

Their water/moisture resistance (near-zero absorption, <0.01%) prevents mold and degradation. Rainy areas’ high humidity (over 80%) and frequent rains rot wood pipes and make non-UV PVC brittle, but PP repels rain, groundwater, and humid air—no swelling, warping, or mold. Its smooth surface stops rain accumulation and damage, ensuring durability in wet conditions.​

UV-stabilized PP resists sunlight damage. Coastal and rainy areas still have intense post-rain sunlight that breaks down many plastics, but UV-stabilized PP avoids discoloration, brittleness, or cracking. It retains strength for 10–20 years outdoors, unlike ordinary polyethylene pipes that turn fragile and leak in 1–2 years.​

Good impact resistance lets PP tolerate wind and debris damage. Coastal typhoons carry debris, and rainy areas have falling branches or sediment scouring, but PP’s toughness withstands minor collisions without cracking—unlike brittle glass or concrete pipes.​

In applications, coastal homes use PP for water supply: buried pipes avoid soil salt corrosion, above-ground ones resist salt air and UV, keeping tap water clean and supply steady.

Coastal aquaculture relies on PP to transport seawater/brackish water for shrimp, crab, or fish farms. Its salt resistance prevents corrosion, and smooth inner walls avoid sediment buildup, maintaining water flow. Unlike concrete that leaches alkalis harming water quality, PP’s inertness keeps aquaculture water stable, boosting organism survival.​

In rainy areas (e.g., Yangtze River Delta), PP handles residential and road drainage. Water resistance prevents blockages from mold/sediment, impact resistance withstands rain-carried debris. Lightweight and easy to install in flood-prone lowlands, PP diverts rain fast to avoid waterlogging—unlike heavy concrete hard to deploy for emergency flood control.​

Coastal/rainy farms use PP for drip/sprinkler irrigation: UV-stabilized PP resists sun and rain, moisture resistance avoids mold in humid fields. Guangdong’s coastal vegetable farms see PP drip pipes last 5–8 years (vs. 2–3 for non-UV plastic), cutting replacement costs and ensuring steady irrigation.​

Coastal parks/resorts use PP for fountain, pond, or lake water circulation: salt resistance and UV stability handle coastal air/sun, non-toxicity protects aquatic plants/fish. Unlike rusty metal pipes that stain water features, PP keeps water clear and low-maintenance.​

PP pipes’ weather resistance solves coastal and rainy areas’ piping pain points, offering durability, safety, and cost-effectiveness, remaining a top choice as these regions prioritize infrastructure resilience.