Safety inspection of bottling after compression by nitrogen compressor

Nitrogen is extremely stable in its normal state. Although the danger is not great, there are still potential safety hazards. After compressing the nitrogen compressor, the manufacturer should pay attention to some matters to ensure the safety of users. It is safer for the user to perform the second inspection.

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• Note for manufacturers of nitrogen compressors

• Perform a second check on the cylinder after compressionNitrogen compressor

Note for manufacturers of nitrogen compressors

1. The compressed gas cylinder should be used vertically and must be fixed with a frame or fence.

2. Pressurized gas cylinders should be placed in a cool, well-ventilated place, away from heat and fire sources, and avoid direct sunlight. Direct sunlight is strictly prohibited. Flammable gas cylinders should be stored separately from oxygen cylinders. It is strictly forbidden to place flammable materials around, and it is strictly forbidden to let flammable gas catch fire.

3. It is forbidden to move the cylinder at will, and it is allowed to be handled gently when moving.

4. Please pay attention to check the air tightness of the gas cylinder and the connected air circuit to ensure that the gas will not leak. When using gas in a cylinder, use a pressure reducing valve (barometer). It is forbidden to mix various gas barometers to prevent explosion.

5. After use, please close the valve as needed, and the main valve should be tightened without leakage. Get in the habit of checking gas cylinders when you leave the laboratory.

6. Do not exhaust all the gas in the cylinder and keep the residual pressure above 0.05MPa (pressure gauge pressure). The residual pressure of flammable gas such as acetylene should be 0.2-0.3 MPa.

7. In order to avoid confusion with various gases, please use a specific color on the outside of the cylinder to distinguish it, and write the name of the gas on the cylinder.

8. Do not allow engine oil or other flammable organic substances (especially valves and pressure reducing valves) to adhere to the cylinder. Do not cover with cotton or linen cloth to avoid accidents caused by burning.

9. Various gas cylinders must be checked regularly in accordance with national regulations. During use, you must pay attention to the condition of the cylinder. If severe corrosion or other severe damage is found, it should be stopped and reported in advance.

Perform a second check on the cylinder after compressing the nitrogen compressor

For users, you should pay attention to whether the cylinders you receive have any safety hazards. For safety reasons, the manufacturer of the nitrogen compressor should also be checked during bottling, and the user should also perform a second inspection.

1. Color coding and labeling

Although the cylinder is color-coded, you should not rely on it to identify the content. The label attached to the cylinder must always be used as the primary means of content identification. Cylinders without labels or cylinders with labels that do not match the color code should not be used. They need to be shelved or quarantined and then returned to the supplier. If any cylinder does not have an attached identification label, it must be rejected at the time of delivery.

After determining the contents of the gas cylinder, you must check whether the gas is suitable for the application. The air pressure in the cylinder should not exceed the installed regulator, and the cylinder needs to be fixed so that it does not tip over, ideally in a dedicated cylinder block or gas storage tank.

2. Cylinder valve

When leaving the factory, the cylinder valve is installed on the cylinder. It is basically a valve that is opened or closed with a key or wrench. Then install the pressure regulator. If the valve is on a newly installed, unused cylinder, it should be factory sealed. Check to ensure that the parts are intact. It is important that there are no traces of solvent, oil, grease or PTFE tape, and dust and moisture must be removed. Please note that do not use PTFE sealing tape because the pressure regulator has its own rubber seal. If used with certain gaseous substances, PTFE can cause fire/explosion.

3. Pressure regulator

Check if it has a date stamp or code, and the inspection period is usually 5 years.

Check to ensure that the identification and grade label are consistent with the manufacturer's name and/or identification and are applicable to the gas type.

Check that it complies with the local standards for pressure regulators and that the pressure gauges are marked as complying with the appropriate local standards, for example, ISO 2503 for pressure regulators, ISO 5171 for pressure gauges, unmodified or unauthorized repairs.

Check for general signs of damage or unauthorized modification, and externally check that the pressure relief valve is intact and does not require modification or unauthorized maintenance. Check internally whether they are not blocked.

Check the cylinder connections to make sure they are free of oil, grease, solvents, debris, PTFE and perpendicular to the regulator body. Check whether the regulator pressure gauge is installed in place and the correct gas type and gas pressure scale. The clean cover should be in a position where the needle correctly reads zero, not under the stop rod or bent.

Check whether the pressure rating is suitable for the cylinder pressure. Check from the outside whether the pressure relief valve is in good condition, whether it needs modification or unauthorized repair. Check internally whether they are not blocked.

Check whether the outlet pressure adjustment range is suitable for the application and the pressure level of the downstream equipment.

Finally, check whether the back cover is in place and whether the pressure relief cover is in place due to an overpressure event.

The two inspections greatly reduced the potential safety hazards of nitrogen. When you are more important in bottlingOxygen compressor和Hydrogen compressors, everything is safe.