The pressure setting of the factory compressed air pipeline needs to take into account the equipment requirements, pipeline loss and safety margin, and its normal range varies according to the industry and gas usage scenario. The following four aspects of pressure standards, setting basis, industry differences and operation and maintenance recommendations are explained to provide reference for enterprise pipeline design.
1. compressed air pipeline pressure standard
the pressure of the factory compressed air pipeline is usually set0.6-1.0MPa(I. e. 6-10 kgf/cm2), the specific value shall be determined according to the following factors:
- end Equipment Requirements
- pneumatic tools (such as air cannons and spray guns) usually require 0. 6-0.7MPa.
- CNC machine tools and automation equipment need 0. 7-0.8MPa.
- Special processes (such as plasma cutting, high pressure cleaning) may require more than 1.0MPa.
- Pipeline pressure loss
- when compressed air flows in the pipeline, the pressure drops due to friction, and the loss value is related to the pipe diameter, length and number of elbows.
- Example: 50mm in diameter and 100 m in length, with a pressure loss of about 0. 1-0.2MPa.
- Safety margin reservation
- in order to cope with peak gas consumption or pipeline leakage, the system design pressure needs to be 0. 1-0.2MPa.
Core Principles of 2. Pressure Setting
- meet equipment requirements
- ensure that the pressure at all gas points is higher than the minimum starting pressure of the equipment to avoid downtime or performance degradation due to insufficient pressure.
- Optimize energy efficiency balance
- excessive pressure will increase the air compressor load and the risk of pipeline leakage. It is necessary to strike a balance between equipment demand and energy consumption.
- Reserved expansion space
- reserve pressure margin for future expansion or new equipment to avoid frequent modification of the pipeline system.
3. pressure configuration differences in different industries
| industry | typical pressure range | gas scene |
|---|---|---|
| machining | 0.6-0.8MPa | CNC machine tools, pneumatic fixtures, sandblasting equipment |
| food and Medicine | 0.5-0.7MPa | packing machinery, aseptic workshop pneumatic valve |
| electronic semiconductor | 0.7-1.0MPa | chip etching, lithography, clean room positive pressure maintenance |
| chemical | 0.8-1.2MPa | pneumatic conveying, reactor stirring, high pressure reaction device |
influence of 4. Pressure Anomaly and Monitoring Suggestions
- pressure too low risk
- decline in equipment efficiency: pneumatic tools are underpowered and production beats are prolonged.
- Process quality fluctuation: uneven spraying thickness, welding strength is not up to standard.
- High pressure hazard
- increased energy consumption: the load of the air compressor increases, and the cost of electricity increases.
- Increased pipeline leakage: shortened seal life, compressed air waste.
- Daily monitoring and maintenance
- install pressure gauge and sensor, and record the pressure of main pipe regularly.
- The pipeline leak detection shall be carried out every quarter, and the leak point shall be repaired.
- Check the safety valve every year to ensure that the overpressure protection function is normal.
Conclusion
the pressure setting of the factory compressed air pipeline needs to be based on the equipment requirements, combined with the pipeline characteristics and energy efficiency requirements, to develop a differentiated plan. Enterprises should establish a pressure monitoring system to regularly evaluate the operating status of the system to ensure a stable and efficient supply of compressed air. Through scientific design and fine operation and maintenance, energy consumption costs can be significantly reduced and production safety can be improved.
