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Advantages of Deflagration Arresters
Deflagration arresters are safety devices specifically designed for deflagration conditions (a violent combustion phenomenon characterized by extremely fast flame propagation speed and intense shock waves). Compared with ordinary flame arresters, their core advantages focus on "withstanding extreme deflagration shocks" and "ensuring complete blocking of the explosion chain". The details can be elaborated from the following five key dimensions:
1. Upgraded Core Protection: Efficiently Block Deflagration Flames and Shock Waves to Avoid "Overpressure Damage"
This is the most critical advantage of deflagration arresters. Ordinary flame arresters can only handle "deflagration" (flame propagation speed < 300 m/s, no obvious shock waves), while deflagration arresters can withstand extreme shocks at the detonation level (flame propagation speed can reach 1000-3000 m/s, accompanied by instantaneous overpressure several times or even dozens of times the design pressure of the pipeline):
Through specially structured "deflagration-arresting elements" (such as stacked multi-layer corrugated metal plates, porous ceramic arrays with buffer chambers, etc.), they not only block the combustion chain through "thermal quenching" (rapid absorption of flame energy) but also disperse and offset the instantaneous shock waves generated by deflagration using the mechanical strength and buffer design of the elements. This prevents shock waves from piercing the pipeline, damaging equipment, or triggering secondary explosions.
They can achieve "bidirectional deflagration arrest": regardless of whether deflagration originates from the upstream or downstream of the pipeline, it can be effectively blocked. They are particularly suitable for scenarios where the medium is prone to forming "deflagration propagation conditions" in the pipeline (such as long-distance flammable gas transmission pipelines, exhaust pipelines of high-pressure reaction kettles).
2. Stronger Tolerance to Operating Conditions: Withstanding Extreme Temperature and Pressure Fluctuations
The deflagration process is accompanied by instantaneous high temperatures (up to 1500-2000℃) and violent pressure fluctuations. Deflagration arresters are specially reinforced in material and structural design:
High-temperature resistant materials: Deflagration-arresting elements are mostly made of high-temperature alloys (such as Inconel, Hastelloy) and special stainless steel (such as 316LMod), which can maintain structural stability at instantaneous high temperatures without melting or deformation. The main shell is made of thick-walled forged steel or cast steel, with compressive strength much higher than that of ordinary flame arresters, enabling it to withstand the instantaneous overpressure during deflagration (the design pressure resistance level of some models can reach above 10MPa).
Fatigue resistance: After "multiple deflagration shock cycle tests", the elements and shell can still maintain sealing performance and flame-arresting efficiency after repeatedly withstanding deflagration shocks, avoiding subsequent protection failure due to structural damage after a single deflagration.
3. More Reliable Flame-Arresting Efficiency: Meeting Strict Deflagration Protection Standards
The performance of deflagration arresters must pass internationally recognized "deflagration tests" for certification, and their flame-arresting efficiency has clear standard-based support, with reliability far higher than that of ordinary flame arresters:
For different media (such as hydrogen, acetylene, and other gases prone to deflagration), dedicated deflagration-arresting element structures (such as smaller pore sizes and higher thermal conductivity) are customized to ensure 100% deflagration blocking efficiency for high-risk media.
4. Extended System Safety: Reducing "Secondary Risks" After Deflagration
In addition to flames and shock waves, deflagration accidents may also be accompanied by secondary risks such as medium leakage and splashing of element fragments. Deflagration arresters reduce such hidden dangers through special designs:
Enhanced sealing performance: Metal sealing gaskets (such as copper-clad asbestos, flexible graphite) or welded sealing structures are used to prevent sealing failure caused by deflagration shocks and avoid leakage of flammable media from the connection between the arrester and the pipeline.
Fragment-proof design: A "fall-off prevention limit structure" is installed between the deflagration-arresting element and the shell. Even under extreme deflagration shocks, the element will not break or fall off, preventing fragments from impacting downstream equipment along with the airflow and causing additional damage.
Some models integrate an "auxiliary pressure relief structure": after blocking deflagration, the residual high-pressure gas in the pipeline can be slowly released to prevent the pipeline from rupturing due to continuous overpressure.
5. Accurate Scenario Adaptability: Covering High-Risk Deflagration Scenarios
Deflagration arresters are designed for special industrial scenarios where deflagration is prone to occur, with stronger adaptability:
Suitable for high-risk medium transmission: such as pipelines for gases or vapors that are prone to deflagration, including hydrogen, acetylene, ethylene, and propane (which have narrow explosion limits, low ignition energy).
Suitable for special process units: such as exhaust pipelines of cracking units in the petrochemical industry, gas transmission pipelines in the coal chemical industry, solvent recovery pipelines in the pharmaceutical industry (prone to generating flammable vapor-air mixtures), and long-distance natural gas transmission pipelines (prone to deflagration propagation under high pressure).
Compatible with multiple installation forms: supporting horizontal/vertical installation and flange/thread/welded connections. Some compact models can be installed near equipment with limited space without affecting the process layout.
Advantages of Deflagration Arresters
Deflagration arresters are safety devices specifically designed for deflagration conditions (a violent combustion phenomenon characterized by extremely fast flame propagation speed and intense shock waves). Compared with ordinary flame arresters, their core advantages focus on "withstanding extreme deflagration shocks" and "ensuring complete blocking of the explosion chain". The details can be elaborated from the following five key dimensions:
1. Upgraded Core Protection: Efficiently Block Deflagration Flames and Shock Waves to Avoid "Overpressure Damage"
This is the most critical advantage of deflagration arresters. Ordinary flame arresters can only handle "deflagration" (flame propagation speed < 300 m/s, no obvious shock waves), while deflagration arresters can withstand extreme shocks at the detonation level (flame propagation speed can reach 1000-3000 m/s, accompanied by instantaneous overpressure several times or even dozens of times the design pressure of the pipeline):
Through specially structured "deflagration-arresting elements" (such as stacked multi-layer corrugated metal plates, porous ceramic arrays with buffer chambers, etc.), they not only block the combustion chain through "thermal quenching" (rapid absorption of flame energy) but also disperse and offset the instantaneous shock waves generated by deflagration using the mechanical strength and buffer design of the elements. This prevents shock waves from piercing the pipeline, damaging equipment, or triggering secondary explosions.
They can achieve "bidirectional deflagration arrest": regardless of whether deflagration originates from the upstream or downstream of the pipeline, it can be effectively blocked. They are particularly suitable for scenarios where the medium is prone to forming "deflagration propagation conditions" in the pipeline (such as long-distance flammable gas transmission pipelines, exhaust pipelines of high-pressure reaction kettles).
2. Stronger Tolerance to Operating Conditions: Withstanding Extreme Temperature and Pressure Fluctuations
The deflagration process is accompanied by instantaneous high temperatures (up to 1500-2000℃) and violent pressure fluctuations. Deflagration arresters are specially reinforced in material and structural design:
High-temperature resistant materials: Deflagration-arresting elements are mostly made of high-temperature alloys (such as Inconel, Hastelloy) and special stainless steel (such as 316LMod), which can maintain structural stability at instantaneous high temperatures without melting or deformation. The main shell is made of thick-walled forged steel or cast steel, with compressive strength much higher than that of ordinary flame arresters, enabling it to withstand the instantaneous overpressure during deflagration (the design pressure resistance level of some models can reach above 10MPa).
Fatigue resistance: After "multiple deflagration shock cycle tests", the elements and shell can still maintain sealing performance and flame-arresting efficiency after repeatedly withstanding deflagration shocks, avoiding subsequent protection failure due to structural damage after a single deflagration.
3. More Reliable Flame-Arresting Efficiency: Meeting Strict Deflagration Protection Standards
The performance of deflagration arresters must pass internationally recognized "deflagration tests" for certification, and their flame-arresting efficiency has clear standard-based support, with reliability far higher than that of ordinary flame arresters:
For different media (such as hydrogen, acetylene, and other gases prone to deflagration), dedicated deflagration-arresting element structures (such as smaller pore sizes and higher thermal conductivity) are customized to ensure 100% deflagration blocking efficiency for high-risk media.
4. Extended System Safety: Reducing "Secondary Risks" After Deflagration
In addition to flames and shock waves, deflagration accidents may also be accompanied by secondary risks such as medium leakage and splashing of element fragments. Deflagration arresters reduce such hidden dangers through special designs:
Enhanced sealing performance: Metal sealing gaskets (such as copper-clad asbestos, flexible graphite) or welded sealing structures are used to prevent sealing failure caused by deflagration shocks and avoid leakage of flammable media from the connection between the arrester and the pipeline.
Fragment-proof design: A "fall-off prevention limit structure" is installed between the deflagration-arresting element and the shell. Even under extreme deflagration shocks, the element will not break or fall off, preventing fragments from impacting downstream equipment along with the airflow and causing additional damage.
Some models integrate an "auxiliary pressure relief structure": after blocking deflagration, the residual high-pressure gas in the pipeline can be slowly released to prevent the pipeline from rupturing due to continuous overpressure.
5. Accurate Scenario Adaptability: Covering High-Risk Deflagration Scenarios
Deflagration arresters are designed for special industrial scenarios where deflagration is prone to occur, with stronger adaptability:
Suitable for high-risk medium transmission: such as pipelines for gases or vapors that are prone to deflagration, including hydrogen, acetylene, ethylene, and propane (which have narrow explosion limits, low ignition energy).
Suitable for special process units: such as exhaust pipelines of cracking units in the petrochemical industry, gas transmission pipelines in the coal chemical industry, solvent recovery pipelines in the pharmaceutical industry (prone to generating flammable vapor-air mixtures), and long-distance natural gas transmission pipelines (prone to deflagration propagation under high pressure).
Compatible with multiple installation forms: supporting horizontal/vertical installation and flange/thread/welded connections. Some compact models can be installed near equipment with limited space without affecting the process layout.
