How to determine the installation position of the flame arrester

Flame arrester mounted on the end of the pipe.

The shell should be made of cast iron and cast aluminum alloy with a magnesium content not greater than that, and other materials can also be used according to the design requirements: the flame arrester shell installed in the pipeline should be made of cast steel.

Welding, the core parts of the flame arrester layer and the core shell and core ring of the flame arrester installed in the pipeline should be made of stainless steel; The core shell of the flame arrester and the pressure ring of the core part installed at the end of the pipe should be cast iron or cast aluminum.

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

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

2. Convey gas pipelines that can decompose on their own and cause flames to spread.

3. Combustible gas connected to open flame equipment.

Pipeline after decompression (water sealing device can be set up in special cases).

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

Precautions for flame arrester installation.

1.The flame arrester should be installed close to the ignition source.

2 .The venting flame arrester should be set as close to the end of the pipeline as possible, and at the same time, it should be considered that it is convenient to overhaul. Generally, the pipe end type venting flame arrester is selected; If the ordinary type venting flame arrester is selected, the influence of the length and shape of the piping pipe of the downstream pipe of the flame arrester on the performance selection of the flame arrester (deflagration resistance type or detonation arrest type) should be considered, and the specifications of the ordinary venting flame arrester should be determined according to the medium working conditions and installation conditions.

3 .When installing the pipeline detonation and flame arrester, it should be noted that the "detonation wave absorber" should be oriented in the direction that may produce detonation, otherwise it will lose its effect of anti-detonation.

4 .The connection between the flame arrester and the pipeline is generally in the form of a flange, and the pipe with a small diameter is connected by threads.

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.

A flame arrester is a safety device used to stop the flame spread of flammable gases and flammable liquid vapors. It is generally installed in a pipeline for transporting combustible gas, or on a ventilated disturbance tank. In the process of home improvement, the flame arrester is also a device that must be installed.

Next, I will introduce how to install and maintain flame arresters.

1. Read the installation instructions carefully.

In order to ensure that the performance of the flame arrester achieves the purpose of use, before installing the flame arrester, it is necessary to carefully read the instructions and carefully check whether the label is consistent with the requirements of the installed pipeline.

Second, start the installation.

Install step by step according to the requirements on the manual, and pay attention to the strict operation in accordance with the requirements during the installation process, so as not to affect the effect of installation.

3. Installation details.

Note that the flow markings on the installed flame arrester must be consistent with the flow direction of the medium.

Fourth, quality inspection. It should be checked every six months. Inspect the flame retardant plate for defects such as clogging, deformation, or corrosion.

5. Maintenance. 1.The blocked fire-blocking layer should be cleaned to ensure that each hole is unblocked, and the deformed or corroded fire-blocking layer should be replaced.

2.When cleaning the flame arrester core, it should be purged with high-pressure steam, non-corrosive dissolving orange agent or compressed air, and should not be brushed with sharp hardware.

3.When reinstalling the flame retardant, the gasket should be updated and it should be confirmed that the sealing surface is clean and undamaged, and that there is no air leakage.

Flame arrester is a device to maintain home safety, you must be careful during the installation process, if you are worried about the installation is not good, you can install it with an experienced master to increase the safety of the use of flame arrester.

From the actual point of view of production, it is better to keep a certain distance and cannot be installed under the furnace, because the flame arrester sometimes has to be removed and cleaned, and it is inconvenient and dangerous to be too close to the furnace.

1.Remove all flange protective caps and discard all packing materials.

2.Check the mating flange gasket on the seat surface. It must be clean, leak-proof, smooth, free of scratches, corrosion resistant, tool marks.

3.inspect the gaskets; Make sure the material is suitable for the application.

4.Lubricate all studs and nuts of the return wheel with the appropriate thread lubricant. If the fastener is a high-temperature or stainless steel material, use a reverse grip compound such as molybdenum disulfide.

5.Bolt ring inner gasket.

6.Set the flame arrester shell flange and the pipe signal line flange to dock, pay attention to the position of the lifting handle and the top nut of the flame arrester element, so as to facilitate the removal of the flame arrester components in the future.

1.Remove all flange protective covers and discard all packaging materials for the oranges.

2.Check the mating flange gasket on the seat surface. It must be clean, flat, free of scratches, corrosion resistance, tool marks.

3.inspect the gaskets; Make sure the material is suitable for the application.

4.Lubricate all studs and nuts with appropriate thread lubricant. If the fastener is high temperature or does not trace the rusty steel material, use a reverse grip compound such as molybdenum disulfide.

5.Bolt ring inner gasket.

6.Set the flame arrester shell flange and the pipeline flange to dock, pay attention to the position of the lifting handle and top nut of the flame arrester banquet element, so as to facilitate the removal of the flame arrester components in the future.

The general recommendations are as follows:

1.The fire should be as close to the fire source as possible.

2.In the far away place of the gas supply pipeline, a corrugated flame arrester should be placed at the outlet of the hydrogen and oxygen machine and at the gas equipment.

3.A safety valve is placed in front of the corrugated flame arrester, so that the huge impact force generated during the tempering can be relieved through the safety valve, protecting the corrugated flame arrester and prolonging the service life.

4.Every time a flashback occurs, the scene of the backfire should be recorded in detail, the cause of the backfire should be found, and the hydroxide flame action can be continued only after it is solved.

5.Any flame arrester has a service life and service life. Generally, it is recommended to temper more than 30 times in a row or use continuously for more than one year, and must be replaced compulsorily.