The gas circuit system is mainly composed of gas source switching system, pipeline system, pressure regulating system, gas consumption point, monitoring and alarm system. For some inflammable and explosive gases, such as hydrogen, acetylene, etc., there may be some differences in the design and construction process, so it is necessary to add safety control devices such as gas flashback preventer.

Summary;

In the modern laboratory, in order to complete the experiment, we need to use a variety of analytical instruments, such as gas chromatograph, atomic absorption, gas-mass spectrometer, ICP and so on. These instruments need to use high-purity gas. The traditional method is to use the independent cylinder gas supply mode. Each instrument and equipment is equipped with a gas cylinder separately to meet the requirements of each instrument In recent years, with the continuous increase of laboratory investment, the rapid increase of instruments and equipment, and the increase of gas consumption year by year, the traditional gas supply mode has been difficult to meet the increasing demand of instruments and equipment. At the same time, the scattered gas supply mode brings about the confusion of laboratory layout, and the frequent replacement of steel cylinders also causes difficulties to the management and maintenance of the laboratory. In order to solve the above two problems To solve these problems, we need a set of high safety and centralized gas distribution system to supply gas from the gas source to the instrument, which is the function of the high-purity gas pipeline system in the laboratory.

classification

Laboratory gas supply system; industrial gas supply system; special gas system of electronic and high-tech workshop;

Characteristic;

The centralized gas supply system in the laboratory involves the design, material selection, engineering installation and acceptance of gas pipeline, which is a professional work. Because the laboratory is usually equipped with many precision large-scale instruments and equipment, if the engineering material is not qualified and the construction process is not precise, leakage may occur in the use process, and impurities are introduced to reduce the purity of high-purity gas, so it can directly As a result, the instrument and equipment cannot be used normally, so it must be designed and constructed by the professional company of gas pipeline installation.

Requirements for design and installation of gas pipeline in Central Laboratory of petrochemical industry!

I. gas cylinder room.

1. The design of the steel cylinder room should be set at the main entrance side of the central laboratory, and sunshade and sunscreen measures should be taken. When the steel cylinder room and the building are integrated, the partition wall should be reinforced concrete explosion-proof wall.

2. It has good ventilation and sufficient explosion discharge area. The indoor ground shall be provided with fire-proof flowers and anti-static measures;

3. Combustible gas cylinders (H2, C2H2) and combustion supporting gas cylinders (O2) shall be arranged separately;

4. Leakage alarm system shall also be set up.

2. Chromatography room.

1. All pipelines in the central laboratory shall be planned as a whole and arranged in a centralized way to facilitate installation, operation and maintenance;

2. All process pipeline main pipes introduced into the central laboratory shall be equipped with shut-off valves, and pressure gauges, thermometers, flow meters, filters, pressure reducing valves, etc. shall be set as required. The valve or instrument should be set at the position convenient for observation and maintenance;

3. Combustible and explosive gases such as hydrogen, acetylene, oxygen, etc. should be laid with open lines;

4. The pipes should be arranged in a centralized way and exposed along the wall, which is convenient for installation and maintenance;

5. The equipment platform using cylinder gas pipeline shall be arranged away from the wall, and the maintenance space reserved shall not be less than 600mm;

6. The hydrogen pipeline should be welded instead of threaded connection and gate valve.