With the rapid economic development in China, the economic levels in various regions have improved significantly, and the number of super - high - rise commercial and residential buildings has been continuously increasing. How to rationally design the water supply system for super - high - rise buildings has become a research and discussion topic for major design institutions. This also places higher demands on construction units and pipeline suppliers.

When designing the water supply for super - high - rise buildings, a series of issues need to be considered, such as construction costs, operating costs, maintenance costs, and the stability of equipment operation.

A super - high - rise building is defined as a building with more than 40 floors and a height of over 100 meters. Today, let's learn about the water supply solutions and pipeline connection standards for super - high - rise buildings!

Layered Water Supply Solution

Most existing buildings over 100 meters adopt the layered water supply solution, mainly for the following reasons:

1. ​​Energy Inefficiency of Single - pump Direct Supply​​: A single - pump direct - to - the - top supply method is not energy - efficient. To supply water to the upper floors, the pump pressure needs to be increased. For the lower - floor users, pressure reduction is required, resulting in energy waste.
2. ​​High Requirements for Direct Supply​​: Direct water supply places high demands on the quality and pressure - bearing capacity of the pipes. When calculating the pressure, factors such as free water head, head loss, pump loss, and elbow loss must be fully considered. The pipes need to have sufficient pressure - bearing capacity, which also places high requirements on the pumps and pipes.
3. ​​Economic and Safety Advantages with Pollution Issues​​: From the perspectives of economy and safety, the initial investment cost and operating cost of layered water supply are relatively low, making it an ideal water supply model. However, the problem of secondary water pollution in the secondary water supply system needs to be addressed.

Building Water Supply and Drainage Design Standards

The "Building Water Supply and Drainage Design Standard" issued by the Ministry of Housing and Urban - Rural Development is a national standard, with the code number GB50015 - 2019. It came into effect on March 1, 2020.

Water Supply Solutions and Pipeline Connection Standards for Super - high - rise Buildings

In Clause 3.5.2 of this standard, it is stipulated that for indoor water supply pipes, corrosion - resistant and easy - to - install and reliable pipe materials should be selected. Stainless steel pipes are given priority, and it is emphasized that plastic pipes should not be used for the vertical water supply pipes in high - rise buildings.

Pipeline Connection Standards

The current mainstream standards for connecting water supply pipes, such as GB/T19228.1, GB/T19228.2, CJ/T151, and CJ/T152, specify a maximum pressure of PN16.
For super - high - rise water supply, considering the pressure - bearing capacity of the pipes and the safety of the system, it is recommended to use flange connections or welding.

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