PVC drain pipe vs. cast iron pipe: A comprehensive comparison of performance, cost, and environmental performance

1. Performance: PVC drain pipe stands out for its lightweight nature, weighing only about one-fifth of cast iron pipe. This significantly reduces transportation and installation complexity, effectively improving construction efficiency. Furthermore, the smooth interior of PVC drain pipe reduces water flow resistance and facilitates rapid drainage. It also offers excellent corrosion resistance, resisting attack from acids and alkalis, and boasts a service life of up to 50 years. Cast iron pipe, on the other hand, is renowned for its high strength, excellent pressure and seismic resistance, and can withstand greater external impacts. It also offers excellent sound insulation and noise reduction, making it suitable for locations requiring high levels of quietness. Under normal use, it boasts a lifespan of 30-60 years.

2. Cost: PVC drain pipe boasts a simple production process and low raw material costs, resulting in a finished product price that's only one-third to one-half that of cast iron pipe. Installation costs are also reduced due to its ease of construction. While cast iron pipe has a higher initial purchase cost, its durability and reduced maintenance and replacement frequency keep overall costs manageable over the long term.

3. Environmental Protection: PVC drainage pipes consume low energy to produce and can be recycled and reused after disposal, reducing resource waste and environmental pollution. Cast iron pipes are made from abundant and renewable iron resources, and the pollution control technology used in the production process is mature, aligning with the concept of green development.

Both PVC and cast iron pipes play an irreplaceable role in building drainage. With their respective advantages, they meet diverse building needs and jointly promote the development and improvement of building drainage systems.