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The process and requirements for installing air conditioning water pipes
2025/5/8
I. Preparations before Installation
Drawing review: Before installation, the construction drawings should be carefully reviewed to understand information such as the direction of water pipes, pipe diameters, connection methods, and the positions of supports, to ensure that the installation process complies with the design requirements.
2. Material preparation: According to the drawing requirements, prepare the necessary water pipe materials, such as PPR pipes, copper pipes, steel pipes, etc., as well as corresponding connecting parts, valves, supports and other accessories. Ensure that the material quality complies with national standards and there are no problems such as damage or rust.
On-site investigation: Conduct an investigation of the installation site to understand information such as the building structure, the location of obstacles, and the crossing positions of pipelines, and make full preparations for the installation process.
3. Installation Process
Pipe prefabrication: According to the drawing requirements, the water pipes are prefabricated and processed, such as cutting, threading, welding, etc. During the prefabrication process, it is necessary to ensure that the pipe dimensions are accurate and the interfaces are smooth and flat.
Bracket installation: Install the brackets on the wall or floor according to the drawing requirements. The support should be firm and reliable, accurately positioned, and capable of bearing the weight of the pipeline and the fluid inside it.
Pipeline laying: Lay the prefabricated pipelines in accordance with the requirements of the drawings. During the laying process, attention should be paid to the handling of the slope, elbows, tees and other parts of the pipeline to ensure smooth and unobstructed water flow.
Pipe connection: According to the material of the pipe and the connection method, select the appropriate connection method, such as hot-melt connection, threaded connection, welding, etc. During the connection process, it is necessary to ensure that the interface is well sealed and there is no leakage.
Valve installation: Install the valve on the pipeline in accordance with the drawing requirements. The valve should be flexible to operate, have reliable sealing, and be capable of meeting the requirements of regulating and cutting off water flow.
System pressure test: After the pipeline installation is completed, a pressure test should be conducted on the entire system. During the pressure test, it should be carried out at the designed pressure. After a certain period of time, observe the pressure changes to ensure that there is no leakage in the system.
System flushing and disinfection: After the pressure test is qualified, the pipeline system should be flushed and disinfected to remove impurities and bacteria inside the pipeline and ensure the hygiene and safety of the system.
4. Installation Requirements
Pipe slope: The water pipes of the air conditioner should have a certain slope to facilitate drainage and exhaust. Horizontal pipes should have a slope of no less than 0.002, and the slope direction should be conducive to drainage.
Pipe supports and hangers: Supports and hangers should be firm, reliable and accurately positioned. The spacing of the brackets should comply with the design requirements and generally should not exceed 3 meters. Supports and hangers should be added at stress concentration points such as elbows and tees.
Pipe connection: The pipe connection should be firm, reliable and well sealed. Hot-melt connections should control the heating time and temperature to ensure the quality of the interface. Appropriate sealing materials should be used for threaded connections to ensure that the interface does not leak. Welding connections should control the welding current and speed to ensure the quality of the weld seam.
Valve installation: Valves should be installed in positions that are convenient for operation and maintenance. The valve handwheel should be installed facing upwards or in a direction that is convenient for operation. Before installation, the valve should undergo pressure testing and cleaning treatment to ensure its good performance.
System pressure test: The system pressure test should be carried out according to the design pressure, and the test duration is generally no less than 30 minutes. During the pressure test, the pressure changes should be observed to ensure that there is no leakage in the system. After the pressure test is qualified, the water in the system should be drained in time.
System flushing and disinfection: System flushing should be carried out using clean water sources, and the flushing time is generally no less than 30 minutes. After rinsing, the system should be disinfected, and the disinfection time is generally no less than 2 hours. After disinfection, the water in the system should be drained in time and then rinsed clean with clear water.
In conclusion, the installation of air conditioning water pipes is a complex and meticulous process that requires strict operation in accordance with design requirements and relevant standards. Through a reasonable installation process and strict quality control measures, the stable operation and efficient use of the air conditioning water pipe system can be ensured.
