When there is a excavation to make a foundation ditch, but the ground water level is higher than that of the ditch, then the precipitation is needed to keep the ditch a dry operation environment. During the project, well screens and pipes will play an essential part.

With the increase of population and industrial water usage, there is a greater need of water resources. Whether in transporting or purifying water, the system building depends a lot on materials like well screens.

In recent years, some original water resource pollution caused by the rapid development of urbanization, together with the considerable city population, display that the importance of enabling to continuously provide clean fresh water is obvious, where stainless steel screens and perforated pipes can not be absent.

Galvanized steel pipes including hot-dip galvanized ones and cold galvanized ones can be used for agricultural irrigation where it is hard to be buried underground because of its high strength. More over, hot-dip galvanized pipes are more rust resistant.

As to transport injection water, different materials and purified water in medical production, sanitary stainless steel pipes are made of acid-proof and alkali-proof austenitic stainless steel, which can bear the temperature from -30°C to 400°C as well as avoid thermal expansion and contraction when used in medical equipment.

Passive Intake Screens can constantly intake water from lakes, rivers and seas with a uniform low velocity. Different kinds of stainless steel alloy can be utilized to make fresh water from sea water.