Daily Inspection Notes for Compressed Air Pipelines

Daily Inspection Guidelines for Compressed Air Piping

Compressed air system serves as core industrial power source. Piping stability directly affects production efficiency, equipment service life and energy consumption. Daily inspection effectively prevents faults and reduces air leakage losses.

 1. Pre-inspection Preparation

Tools Preparation

Prepare calibrated portable pressure gauge, leak detection fluid, sound detector, infrared thermometer, flashlight, marker and inspection log. Equip safety ladders, safety belts and non-slip shoes for overhead pipelines.

 Information Confirmation

Check operation logs to confirm standard pressure range (0.6~0.8MPa), daily production load and peak air consumption period to avoid production disruption.

2. Key Inspection Items

 Pressure Check

Inspect pressure of main pipes, branch pipes and equipment inlets.

- Excess pressure over 0.85MPa: check faulty pressure reducing valve, pipe blockage or sudden drop of terminal air use.

- Low pressure below 0.5MPa: inspect insufficient compressor output, air leakage or excessive terminal air consumption.

- Frequent pressure fluctuation indicates hidden leakage, improper valve adjustment or abnormal compressor unloading.

 Leakage Detection

Air leakage causes huge energy waste.

- Visual check: Apply leak detection fluid on flanges, threaded joints, valves and welds to observe bubbles.

- Auditory check: Detect hissing sound with sound detector.

- Instrument check: Verify suspected leaks via ultrasonic leak detector.

Focus on corroded old pipes, vibrating joints and aging gaskets.

Pipeline Appearance & Support Check

Check pipes for corrosion, deformation and cracks. Fasten loose pipe clamps and brackets; install shock-absorbing pads to reduce excessive vibration.

Valves & Accessories Inspection

Confirm flexible switch and tight sealing of stop valves, ball valves and pressure reducing valves. Replace blocked filter elements when pressure difference exceeds 0.1MPa. Drain accumulated water and ensure normal operation of automatic drain valves. Maintain proper oil level of oil mist lubricators.

Temperature & Drainage Check

Measure pipe temperature with infrared thermometer; excessive local heat suggests blockage or internal valve leakage. Drain water regularly from air tanks and low-lying pipes to prevent corrosion and poor air quality.

3. Abnormality Handling

Fix minor leaks temporarily; report and shut down equipment for major leakage. Adjust pressure valves or clear blockages for abnormal pressure. Clean filters or maintain cooling system for overheating; dredge or replace faulty drain valves.

 4. Record & Feedback

Record inspection time, location, items, faults and solutions. Summarize data weekly to formulate maintenance plans. Report major hidden dangers timely.

 5. Safety Regulations

Wear full PPE; fasten safety belts during high-altitude operation. Shut off upstream valves and release pressure before maintenance. Drain water thoroughly in low temperature to prevent pipe freezing. Avoid random operation of main valves to prevent sudden pressure change.

 Conclusion

Standard daily inspection lowers failure rate and saves energy. Establish complete inspection rules and strengthen staff training to ensure safe and efficient production operation.