Are there any requirements for the rated maximum pressure of the air compressor

Technical specifications for the rated maximum pressure of air compressors

The rated maximum pressure of the air compressor is the core safety parameter, and its setting must strictly follow the technical specifications and use scenario requirements. The following specifications are given for relevant technical standards and management requirements:

1. Setting principle of rated maximum pressure

1. Designing safety boundaries：
   • The rated maximum pressure of conventional industrial air compressors is usually set to 1.25-1.5 times the working pressure. This coefficient is comprehensively determined based on safety factors such as material fatigue strength and seal pressure resistance.
   • Special application scenarios (such as filling high-pressure gas cylinders) need to pass third-party type tests, and the pressure safety factor must not be less than 2.0.
2. Basis for standards and specifications：
   • Universal equipment must meet the requirements of GB/T 3853 “Acceptance Test for Positive Displacement Air Compressors”, and the maximum allowable working pressure deviation shall not exceed ±2% of the set value.
   • Explosion-proof equipment must also meet the AQ1033 “Safety Technical Specifications for Air Compressors for Coal Mines”, and the pressure vessel part must obtain a special equipment manufacturing license.

2. Pressure control technical requirements

1. safety protection device：
   • A dual-circuit pressure regulation system must be equipped. When the main pressure regulating valve fails, the safety valve should automatically open when the set pressure is 1.1 times.
   • The air storage tank needs to be equipped with a pressure gauge and a temperature sensor to achieve pressure-temperature linkage protection, and automatically shut down when temperature and pressure exceed.
2. Piping system adaptation：
   • The design pressure of the main gas supply pipe network should be 10% higher than the maximum exhaust pressure of the equipment, and a safety margin for pressure fluctuations should be reserved.
   • The terminal gas point needs to be equipped with a pressure reducing valve to accurately regulate the working pressure to the range of process requirements.

3. Pressure specifications for typical application scenarios

1. General industrial field：
   • Pneumatic tool drive: rated pressure 0.6 – 0.8MPa, maximum pressure does not exceed 1.0MPa.
   • Spraying operation: Rated pressure 0.3 – 0.5MPa, maximum pressure limit within 0.7MPa.
2. Special process scenarios：
   • High-pressure cleaning: The rated pressure is 10 – 35 MPa, and a pressure pulse attenuation device needs to be equipped to avoid pipeline vibration.
   • Supercharging application: Pressure doubling is achieved through a supercharger, but the maximum pressure of the system shall not exceed 80% of the design value.

4. Operation and maintenance management requirements

1. Key points of daily inspection：
   • Check the integrity of the safety valve lead seal before starting up every day, and manually test the flexibility of opening and closing.
   • Verify the accuracy of the pressure gauge every week and replace it immediately when the error exceeds ±1.6%.
2. Regular inspection items：
   • The pipeline pressure test is carried out every six months. The test pressure is 1.5 times the maximum working pressure, and there is no leakage when the pressure is maintained for 30 minutes.
   • The wall thickness of pressure vessels is tested every year, focusing on monitoring the elbow of the exhaust pipe.
3. Overpressure risk disposal：
   • When an abnormal increase in pressure is found, immediately start the emergency shutdown procedure and cut off the power supply.
   • After troubleshooting, system purging must be carried out in accordance with GB/T 13928 “Specifications for compressed air dryers” to prevent secondary accidents caused by residual pressure.

It is recommended that enterprises establish a compressed air system pressure management ledger to record key parameters such as equipment rated pressure, actual operating pressure, and safety valve settings. For continuous operation systems, an intelligent pressure monitoring platform can be configured to realize real-time collection of pressure data, over-limit warning and trend analysis to ensure that the system always operates within a safe pressure range.