Scope of application of pipeline venting flame arresters

Article 130 of the Regulations for the Safety and Technical Supervision of Pressure Pipelines - Industrial Pipelines stipulates that the following venting or exhaust pipelines should be equipped with venting flame arresters:

1. The direct venting pipe of the storage tank (including the venting pipe with breathing valve) where the flash point is lower than or equal to 43, or the maximum working temperature of the material is higher than or equal to the flash point of the material;

3. Exhaust pipes of internal combustion engines in hazardous places.

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following are the top ten domestic first-line valve brand manufacturers in 2022-2023, but for reference only: Suzhou Neway Valve Co., Ltd., Shanghai Guanlong Valve Machinery, Shanghai Qizhong Valve Manufacturing, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

1. The safety flame retardant speed of the selected flame arrester should be greater than the (flame) propagation speed that may be achieved by the installation position. 2. The (combustible) gas transmission pipeline connected to the burner shall be equipped with a flame arrester when there are no other anti-flashback facilities. 3. To prevent the propagation at subsonic speed (flame), a deflagration flame retardant should be used, and its installation position should be close to the fire source; 4. To prevent the propagation at the speed of sound or supersonic (flame), an anti-detonation flame arrester should be used, and its installation position should be far away from the fire source.

5. For anti-detonation flame arresters with different nominal diameters, the required installation distance from the ignition source is shown in the table. 6. The flame arrester used in cold areas should be partially or completely shelled with a heating jacket, and other heating methods can also be used. 7. Under special circumstances, flame arresters with flushing pipes, pressure gauges, thermometers, sewage outlets and other interfaces can be selected as needed.

8. The flame arrester installed at the end of the pipe should be threaded when the nominal diameter is less than DN50; When the nominal diameter is greater than or equal to DN50, the flange connection should be used. 9. The flame arrester installed in the pipeline should be connected by flange.

Article 131 of the Regulations for Technical Supervision of Pressure Pipeline Safety - Industrial Pipelines stipulates that pipeline flame arresters shall generally be installed at the designated position of the pipeline system under any of the following circumstances:

1. Convey mixed gas pipelines that may produce deflagration or detonation;

2. Conveying gas pipelines that can decompose by themselves and cause flames to spread;

3. The pipeline of combustible gas after depressurization connected to the open flame equipment (water sealing device can be set up in special circumstances);

4. The exhaust gas pipeline before entering the torch head.

Pipeline flame arresters.

Introduction to pipeline flame arresters.

Pipeline flame arrester, also known as fire arrester, the function of flame arrester is to prevent external flames from escaping into equipment and pipelines containing flammable and explosive gases or to prevent flames from spreading between equipment and pipelines. Flame arresters are designed and manufactured by applying the principle that when the flame passes through the narrow pores of the thermal conductor, it is extinguished due to heat loss. The flame arrester structure of the flame arrester is gravel, wire mesh or corrugated.

It is suitable for combustible gas pipelines, such as gasoline, kerosene, light diesel oil, benzene, toluene, ** and other oil storage and irrigation or flare systems, gas purification and ventilation systems, gas analysis systems, coal mine emission systems, heating furnace fuel gas pipeline networks, and can also be used in acetylene, oxygen, nitrogen pipeline supplies. This valve can be used in conjunction with a breathing valve or as a stand-alone valve. This type of valve should generally be installed horizontally or vertically in the pipeline according to the working conditions.

Main performance of pipeline flame arrester.

1. The explosion-proof performance is qualified, and the 13 consecutive explosion-proof performance tests can be fire-resistant each time.

2. The burn-resistance performance is qualified, and there is no tempering phenomenon in the burn-resistance test for 1 hour.

3. The shell hydrostatic test is qualified. This product has reasonable structure, light weight and corrosion resistance. Easy to access and easy to install. The flame arrester core is made of stainless steel, which is corrosion-resistant and easy to clean.

Answer]: b, c, d

This question examines the safety and rough technology of pressure piping. The selection of fire arrest ballasts is mainly based on the chemical properties, temperature and pressure of the medium.

Answers]: a, b, c, d

Where there is one of the following situations, generally should be set up at the designated position of the pipeline system pipeline flame arrester: (front beam 1) transport may produce deflagration or detonation of mixed gas pipeline; 2. Conveying gas pipelines that can decompose by themselves and cause flames to spread; (3) The pipeline of combustible gas after decompression connected to the open flame equipment (in the case of special cherry blossoms, a water sealing device can be set up); 4. The exhaust gas pipeline before entering the torch head.

Overview of Pipeline Flame Arresters:

GZW-1 deflagration pipeline flame arrester is a new type of combustible gas pipeline flame arrester, which is a new generation of new products. The flame arrester has been jointly tested by the University of Science and Technology of China and Tianjin Fire Science Research Institute, and its performance fully complies with the provisions of GB13347-92 "Fire Retardant Performance and Test Methods of Oil Gas Pipeline Flame Arresters". The flame arrester has a reasonable structure, and the flame arrester layer is made of stainless steel material, which is corrosion-resistant and easy to clean.

The shell is made of stainless steel, carbon steel and other materials, which can meet the needs of various process pipelines.

Performance and characteristics of pipeline flame arrester:

The flame arrester has reasonable structure, light weight, corrosion resistance, and qualified explosion resistance, and can resist fire every time it has been tested by subsonic flame for 13 consecutive times.

The flame arrester is easy to access and easy to install. The burn-resistance performance is qualified, and there is no tempering phenomenon in the burn-resistance test for 1 hour.

The flame arrester core is made of stainless steel, which is corrosion-resistant and easy to clean. The shell hydrostatic test is qualified.

Scope of application of pipeline flame arrester:

The flame arrester is suitable for pipelines, class A with a flash point of less than 28, oil, hydroxide liquefaction and kerosene, diesel, methyl benzo** with a flash point of less than 60, etc., on pipelines that transport flammable gases, flare series, oil and gas systems, heating furnace fuel gas pipeline networks, gas purification and ventilation systems, gas analysis systems, and coal mine gas emission systems.

Pipe flame arrester parts material:

Body material. Carbon steel WCB, stainless steel,

Flame retardant core material.

Stainless steel explosion-proof flame-retardant corrugated plate.

Seal material.

Oil-resistant asbestos rubber, PTFE ambient temperature

Nominal pressure (mpa).

Explosion-proof level. bs5501:ⅱa、ⅱb、ⅱc

Pipe flame arrester national standard flange connection dimensions:

GB and JB specifications. Installation size (mm) dk

dlhn-ddn20

dn25dn32

dn40dn50

dn65dn80

dn100dn125

dn150dn200

1. The explosion-proof performance is qualified, and the 13 consecutive explosion-proof performance tests can be fire-resistant each time.

2. The burn-resistance performance is qualified, and there is no tempering phenomenon in the burn-resistance test for 1 hour.

3. The shell hydrostatic test is qualified. This product has reasonable structure, light weight and corrosion resistance. Easy to access and easy to install. The flame arrester core is made of stainless steel, which is corrosion-resistant and easy to clean.