High‑purity nitrogen
Product Details
1. Product Name
Pure nitrogen, industrial nitrogen, high-purity nitrogen, ultra‑pure nitrogen
2. Hydrogen’s chemical molecular formula: N 2
A colorless, odorless gas at room temperature and pressure.
3. Purity
99.99%, 99.999%, 99.9999%
4. Technical Requirements for Pure Nitrogen, High-Purity Nitrogen, and Ultra-Pure Nitrogen
| Project Name |
Indicator |
||
| Ultra-pure nitrogen |
High‑purity nitrogen |
Pure nitrogen |
|
| Nitrogen Purity (Volume Fraction) / 10 -2 ≥ |
99.9999 |
99.999 |
99.99 |
| Oxygen content (volume fraction) / 10 -6 ≤ |
0.1 |
3 |
50 |
| Argon content (volume fraction) / 10 -6 ≤ |
2 |
- |
- |
| Hydrogen content (volume fraction) / 10 -6 ≤ |
0.1 |
1 |
15 |
| Carbon monoxide content (volume fraction) / 10 -6 ≤ |
0.1 |
1 |
5 |
| Carbon dioxide content (volume fraction) / 10 -6 ≤ |
0.1 |
1 |
10 |
| Methane content (volume fraction) / 10 -6 ≤ |
0.1 |
1 |
5 |
| Moisture content (volume fraction) / 10 -6 ≤ |
0.5 |
3 |
15 |
V. Packaging Specifications
8L 10L 40L 50L Container Units
VI. Applications of Nitrogen:
1. Compound Production: The manufacture of compounds such as fertilizers, ammonia, and nitric acid.
2. Inert Protection: Inert protective media for quick-frozen foods.
3. Refrigerants: Refrigerants and coolants for low-temperature crushing and other applications.
4. Electronics Industry: Epitaxy, diffusion, chemical vapor deposition, ion implantation, plasma dry etching, photolithography, and other processes in the electronics industry.
5. Standard gases: Used as standard gases, calibration gases, zero-point gases, balancing gases, and more.
7. Important Notes:
1. When conducting a leak test using nitrogen, equipment and pipelines should be categorized according to their pressure ratings. Blind flanges must be installed at connections between different systems and at valves leading outside the system to prevent gas migration and potential damage to others. Safety valves must be in good working condition; all over-range instruments should be removed or their root valves closed to avoid damage to instruments, equipment, and pipelines caused by overpressure. During pressurization, a dedicated supervisor must be on hand to monitor conditions and prevent overheating or overpressure. The test pressure should be set at 1.1 times the operating pressure. All other personnel working within the relevant system must evacuate during the operation, and inspection personnel must ensure that they do not stand on either side of flanges (or covers), as these areas pose a significant risk. In addition, any leak points must be addressed only after the system has been depressurized; working under pressure is strictly prohibited.
2. For nitrogen purging and replacement of systems or equipment, an operation plan must be developed prior to the process, outlining the operational procedures and clearly designating discharge locations to ensure clear division of labor and well-defined responsibilities. Discharge outlets should be located in safe areas or equipped with dedicated personnel for monitoring, and all personnel engaged in other operations must evacuate the vicinity of the discharge outlet during the operation. Reliable isolation measures must be implemented for equipment and piping systems undergoing purging and replacement. All components and systems unrelated to the purging process must be shut down or isolated with blind flanges; all related operations must be carried out strictly in accordance with the blind flange layout diagram, accompanied by a comprehensive record of blind flange isolation inspections. During replacement, all drain valves or vent valves must be opened one by one to relieve pressure and discharge residual liquids, and the bypasses on both sides of control valves must also be opened.
3. When performing purging, the nitrogen inlet point and the discharge point for the medium being purged should be selected based on the differences in density between nitrogen and the medium being displaced. Sampling and analysis locations must be determined to avoid omissions and prevent dead spots. At the designated sampling points, measure the oxygen content and hydrocarbon gas content; sampling points should be located downstream of the nitrogen purge connection (near the end point and areas prone to forming dead spots). After nitrogen purging until the oxygen content falls below 0.5%, reduce the pressure to a slightly positive pressure and maintain that pressure.
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Shandong Shaohua Gas Co., Ltd.
Phone: 40080 40085
Fax: +86 (535) 6013313
E-mail: ma0616@shaohuagas.com
Address: No. 5 Fengshan Road, Zhifu District, Yantai City, Shandong Province