1) Urban tap water supply, direct drinking water supply and different quality water supply.
2) Coal gas, liquefied gas and natural gas distribution and transportation.
3) Corrosive water drainage
4) Liquid pipe transportation in beverage and food industry, petrochemical industry, chemical fiber, forestry, printing and dyeing, pharmacy, papermaking, metallurgy, etc.
5) Water conservancy and farm irrigation works
6) Mud and mine slurry transportation
7) Industrial and living waste drainage
8) Post and telecommunication line, electricity cable protection bushing.
9) Seawater aquaculture and seawater transportation filed.