Differences method of construction 1Types and Problems of Piping

• 

  Copper pipes

  - Problems of blue/green stain after 5 years (harmful for human body)

  - Especially common in Korea

• 

  Stainless steel pipe

  - Problems of germs and bacteria after 5 years

  - Partial occurrence in every 10 years

• 

  Cast iron pipe

  - Problems of scale and rust

• 

  Cement lining pipe

  - Problems with coating peeling

  - No rehabilitation in the event of a rusted water

• 

  PE pipe

  - Problems with germs and bacteria after 3 years

• 

  Zinc galvanized steel pipe

  - Problems with rusted water after 7 years

  - Leakage after 10 years

  - Requires the replacement of 15-year-old pipes

  - Replacement of pipes in 15 years

Differences method of construction 2Comparison with other methods

• Replacement of piping

  • - The most common way
  • - The final stage of piping management due to high cost and pollution problem

• Cleaning

  • - Low cost
  • - Must be carried out periodically and constantly incurred

• Coating

  • - Simple removal of rust, scale and water
  • - Concern raised about health epidemics caused by carcinogenic substances (bisphenol A) in raw materials

• Chemicals

  • - Cheapest
  • - Concern raised for health and deterioration of water quality, continuous input

• - Addressing foodborne bacteria and corrosion problems
• - Solve problems of germs, water scale and high management cost
• - Low cost, most economical
• - Demonstrated confirmation of effectiveness

Table of Comparison