This standard specifies the professional terminology of dust explosion prevention. This standard is applicable to the formulation of dust explosion prevention standards, the preparation of technical documents, the compilation and translation of professional manuals and teaching materials. This standard does not apply to explosive dust. GB/T 15604-1995 Dust explosion prevention terminology GB/T15604-1995 standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Terminology for dust explosion prevention
Terminology for dust explosion preventionSubject content and scope of application
This standard specifies the professional terminology for dust explosion prevention. GB/T15604--1995
This standard applies to the formulation of dust explosion prevention standards, the preparation of technical documents, the compilation and translation of professional manuals and teaching materials. This standard does not apply to explosive dust.
2 Reference standards
GB2900.35Electrical terminology: explosion-proof electrical equipment for explosive atmospheres 3 Basic concepts
3.1 Dust
Solid matter in fine granular form.
3.2 Combustible dustCombustible dustDust that can undergo a violent oxidation reaction with a gaseous oxidant or air under certain conditions. Synonyms: Explosive dust
3.3 Dust cloud
A mixture of high-concentration dust and gas formed by dust suspended in the air or in a gaseous oxidant. 3.4 Dust layer
A group of dust deposited (pile) on the ground or on the surface of an object. 3.5 Combustible hybrid A multiphase fluid formed by a mixture of combustible dust, one or more flammable gases or vapors with air or a gaseous oxidant. Specific resistance of a dust3.6
The resistance of a dust layer with a length of 1 cm and a cross-sectional area of ​​1 cm2 under specified test conditions. 3.7 Conductive dust
Dust with a specific resistance not greater than 105α·cm. 3.8 Non-conductive dust Dust with a specific resistance greater than 10°Q·cm.
Specific surface area of ​​a dust The sum of the surface areas of dust particles per unit mass. 3.10 Dust explosion dust explosion
The phenomenon that the flame propagates in the combustible dust cloud dispersed in the space, causing a significant jump in pressure and temperature. 3.11 Dust burning dust burning
The phenomenon that the flame propagates steadily in the dust cloud at a speed much lower than the speed of sound in the original dust cloud. Approved by the State Bureau of Technical Supervision on June 19, 1995 and implemented on January 1, 1996
3.12 Dust detonation dust detonation
GB/T15604—-1995
The phenomenon that the flame propagates steadily in the dust cloud at a speed higher than the speed of sound in the original dust cloud. 3.13 Dust deflagration dust deflagration An unstable form between combustion and detonation. 3.14 Dust ignition
When a local dust cloud or dust layer is heated, the temperature inside the dust cloud or dust layer rises extremely unstably and suddenly changes (i.e., forms a flame).
3.15 Spontaneous ignition of a dust layerThe heat released by the slow oxidation of dust accumulates inside the dust layer, and the temperature rises, causing the dust layer to catch fire. 3.16 Ignition source
The energy source that releases heat and can cause the temperature of the local dust cloud to suddenly change (i.e., form a flame). Synonym: ignition source
3.17 Oxplosion productsThe gaseous, liquid, and solid substances (residual ash and coke) generated after the dust cloud explodes. 3.18 Flame front
The interface between the combustion products and the unburned dust cloud. 3.19 Flame propagation speed flamespeed
The speed at which the flame front moves in the unburned dust cloud. Synonym: flame speed
3.20 Speed ​​of a dust layer speed of a dust layer The ratio of a given dust layer length to the time increment from the ignition of its end to the complete combustion of the dust layer under given conditions. 3.21 Explosion wind explosion wind
The movement of mixed material points accompanying the shock wave front when a combustible dust cloud explodes. 3.22 Explosion temperature explosion temperature The maximum temperature to which the explosion products are heated by all the heat released by the explosion of a combustible dust cloud to form stable compounds under constant volume adiabatic conditions.
Synonym: explosion flame temperature
3.23 Explosion pressure explosion pressure The maximum force per unit area exerted by the expansion of the explosion products on the outside world under constant volume adiabatic conditions. 3.24 Subsequent explosion When a dust explosion occurs, the shock wave of the initial explosion will lift the deposited dust again to form a dust cloud, which will be ignited by the flames that follow, resulting in a continuous explosion.
Minimum breakdown field strength of a dust layer3.25
The minimum value of the electric field strength applied to the dust layer when a dust layer of a given thickness is broken down. 3.26 Critical specific resistance of a dust layerThe specific resistance of a non-conductive dust layer when it is broken down by the minimum field strength. 4 Explosion characteristics
4.1 Parameters of dust explosibilityParameters used to describe the relative explosion hazards of different types of dust. 4.2 Classification of dust explosion hazardsBased on the values ​​of the dust explosion characteristic parameters, different types of dust are divided into several grades according to the size of their relative explosion hazards. 4.3 Limiting explosive concentration of dust cloud limitingexplosible concentrationofadust266
GB/T 156041995
The lowest or highest concentration at which a dust cloud will automatically and continuously burn under the action of an ignition source of a given energy. Also called the lower or upper limit concentration of a dust explosion.
4.4 Optimum explosible concentration of a dust The dust concentration at which the minimum ignition energy can ignite the dust. 4.5 Minimum ignition temperature of a dust cloud minimum heating temperature (ambient temperature) at which the temperature of a dust cloud changes suddenly (ignites) when the dust cloud is heated. 4.6 Minimum ignition temperature of a dust layer minimum heating temperature (ambient temperature) at which the temperature of a dust layer changes suddenly (ignites) when the dust layer is heated. Induction time of ignition4.7
The time interval from the time when the dust cloud contacts the ignition source to the time when the temperature of the dust cloud suddenly changes (flame is formed). 4.8Minimum ignition energy of a dust cloudThe minimum value of the ignition source energy that causes the dust cloud to ignite when the combustible dust in the dust cloud is at the most ignitable concentration. 4.9Maximum explosion pressure of a dust cloud pmaxThe maximum value of all explosion pressure peaks corresponding to different concentration values ​​within the combustible dust concentration range in the dust cloud under specified volume and ignition energy.
4.10Maximum rate of pressure rise of a dust explosionThe maximum value of the slope of the pressure-time rise curve when the explosion produces the maximum explosion pressure under specified volume and ignition energy.4.11Kmaxexplosion index of a dust cloudKmaxIn a closed container, for a given dust explosion, the product of the maximum explosion pressure rise rate and the cube root of the volume of the explosion container is a constant, which is called the explosion index of the dust. That is; Kmax = (dp/dt)mxV1/3
Where: V—volume of the explosion container, L.
4.12Minimum oxygen content for dust explosionminimum oxygen content concentration for dust explosionThe minimum percentage of oxygen in a mixture that can ignite a dust cloud. Synonym: limiting oxygen content
4.13Area subject to dust explosion hazardsA place where combustible dust and gaseous oxidants (or air) exist. 5Dust explosion prevention
5.1Explosion prevention
Technology to prevent dust explosions by eliminating the conditions for the formation of combustible dust or dust clouds, or all possible ignition sources. 5.2 Adhering
An explosion-proof method that uses adhesives to bond dust into blocks to make it lose its flying nature. 5.3 Inerting
A method that fills a place with dust explosion hazard with sufficient inert gas or sprinkles inert dust on the dust layer to make the dust mixture lose its explosiveness. bzxZ.net
5.4 Maximum permissible oxygen content concentration When reducing the oxygen content to prevent dust explosion, the maximum value of the oxygen volume percentage when the dust cloud in the controlled space is not ignited. 5.5 Effective protection time267
GB/T 15604--1995
For explosion-proof measures that need to be implemented periodically, the time interval from the implementation of the measures to the loss of their explosion-proof effect. 5.6 Continuous spraying: A method of continuously spraying water mist in dust explosion hazardous areas where periodic explosion-proof measures are ineffective, so that suspended dust is deposited and the deposited dust loses its suspension ability. 6 Dust explosion control
6.1 Explosion mitigation: When an explosion occurs, certain measures are taken to limit the spread of the explosion so that the explosion accident does not expand. 6.2 Explosion suppression: When an explosion occurs, the flame is extinguished through physical and chemical effects so that the unexploded dust no longer participates in the explosion. Synonyms: Flameproof
6.3 Explosion arrestment
In passages containing combustible dust, an explosion control technology is installed that can prevent the flame from passing through and block and eliminate waves, so as to block the explosion within a certain range.
6.4 Explosion venting of dust explosions When an explosion occurs in a containment containing dust and gaseous oxidants or air, the high-temperature, high-pressure combustion products and unburned materials generated by the explosion are released through the weak parts of the containment to a non-hazardous direction before the explosion pressure reaches the ultimate strength of the containment, so that the containment is not destroyed.
6.5 Vent area
The area of ​​the weak part of the containment that can effectively release the explosion pressure in the containment. o. 6 Ratio of vent area to vessel volume The ratio of the vent area to the volume of the containment. 6.7
Pressure venting membrane A fixed diaphragm embedded in the pressure relief port that can be quickly broken under pressure release. 6.8 Pressure venting valve; pressure venting flap A cover installed on the pressure relief port that can automatically and quickly open under pressure release. 6.9 releasing pressure; venting pressure The internal pressure of a given enclosure when pressure relief can be effectively achieved at a level far less than the ultimate strength of the enclosure. 6.10 flamerrester
An apparatus installed in a pipeline where combustible dust circulates to prevent the passage of dust combustion flames. explosion barrier; explosion arrester6.11
An apparatus installed in a pipeline where combustible dust circulates to block dust explosion waves and flames. 6.12 rapid-action valve for explosion isolation A valve installed in a pipeline where combustible dust circulates, which is normally open under normal circumstances and automatically closes when an explosion occurs, separating the explosion zone from the unexploded zone.
6.13 automatic suppression of explosion A technology that relies on the advance detection of explosion information to forcibly throw flame extinguishing agents onto the flame front to extinguish the flame and prevent the spread of the explosion.
passive suppression of explosion.6.14
Passive explosion isolation
Technology that relies on the power of the shock wave generated by the dust explosion to discard the flame suppressant to form a suppression zone, extinguish the flame that lags behind the shock wave, and prevent the explosion from spreading.
6.15 Suppressor
A device that is equipped with an explosion suppressant and can quickly disperse the flame suppressant under the action of internal pressure. The internal pressure can be the pressure of the stored fluid or 268
GB/T15604—1995
can also be obtained from chemical reactions (such as gases released by explosion or combustion). Flame extinguishing agent extinguishing agent for explosion suppression; suppressant6.16
When in contact with the explosion flame, it can absorb heat, insulate, reduce the oxygen content or eliminate the active groups in the flame, terminate the combustion chain and other physical and chemical effects in a short period of time, so that the explosion cannot continue. Synonym: Explosion-proof agent
Additional explanation:
This standard is proposed by the National Technical Committee for Dust Explosion Prevention Standardization. This standard is drafted by the Chongqing Branch of the China Coal Research Institute. The main drafters of this standard are Ji Qing and Fei Guoyun. 2696 Continuous spraying is a method of continuously spraying water mist in dust explosion hazardous places where periodic explosion-proof measures are ineffective, so that suspended dust is deposited and the deposited dust loses its suspension ability. 6 Dust explosion control
6.1 Explosion mitigation When an explosion occurs, certain measures are taken to limit the spread of the explosion so that the explosion accident does not expand. 6.2 Explosion suppression When an explosion occurs, the flame is extinguished through physical and chemical effects so that the unexploded dust no longer participates in the explosion. Synonyms: Flameproof
6.3 Explosion arrestment
In the passage containing combustible dust, an explosion control technology that can prevent the flame from passing through and block and eliminate waves is set to block the explosion within a certain range.
6.4 Explosion venting of dust explosions When an explosion occurs in a containment containing dust and gaseous oxidants or air, the high-temperature, high-pressure combustion products and unburned materials generated by the explosion are released through the weak parts of the containment to a non-hazardous direction before the explosion pressure reaches the ultimate strength of the containment, so that the containment is not destroyed.
6.5 Vent area
The area of ​​the weak part of the containment that can effectively release the explosion pressure in the containment. o. 6 Ratio of vent area to vessel volume The ratio of the vent area to the volume of the containment. 6.7
Pressure venting membrane A fixed diaphragm embedded in the pressure relief port that can be quickly broken under pressure release. 6.8 Pressure venting valve; pressure venting flap A cover installed on the pressure relief port that can automatically and quickly open under pressure release. 6.9 releasing pressure; venting pressure The internal pressure of a given enclosure when pressure relief can be effectively achieved at a level far less than the ultimate strength of the enclosure. 6.10 flamerrester
An apparatus installed in a pipeline where combustible dust circulates to prevent the passage of dust combustion flames. explosion barrier; explosion arrester6.11
An apparatus installed in a pipeline where combustible dust circulates to block dust explosion waves and flames. 6.12 rapid-action valve for explosion isolation A valve installed in a pipeline where combustible dust circulates, which is normally open under normal circumstances and automatically closes when an explosion occurs, separating the explosion zone from the unexploded zone.
6.13 automatic suppression of explosion A technology that relies on the advance detection of explosion information to forcibly throw flame extinguishing agents onto the flame front to extinguish the flame and prevent the spread of the explosion.
passive suppression of explosion.6.14
Passive explosion isolation
Technology that relies on the power of the shock wave generated by the dust explosion to discard the flame suppressant to form a suppression zone, extinguish the flame that lags behind the shock wave, and prevent the explosion from spreading.
6.15 Suppressor
A device that is equipped with an explosion suppressant and can quickly disperse the flame suppressant under the action of internal pressure. The internal pressure can be the pressure of the stored fluid or 268
GB/T15604—1995
can also be obtained from chemical reactions (such as gases released by explosion or combustion). Flame extinguishing agent extinguishing agent for explosion suppression; suppressant6.16
When in contact with the explosion flame, it can absorb heat, insulate, reduce the oxygen content or eliminate the active groups in the flame, terminate the combustion chain and other physical and chemical effects in a short period of time, so that the explosion cannot continue. Synonym: Explosion-proof agent
Additional explanation:
This standard is proposed by the National Technical Committee for Dust Explosion Prevention Standardization. This standard is drafted by the Chongqing Branch of the China Coal Research Institute. The main drafters of this standard are Ji Qing and Fei Guoyun. 2696 Continuous spraying is a method of continuously spraying water mist in dust explosion hazardous places where periodic explosion-proof measures are ineffective, so that suspended dust is deposited and the deposited dust loses its suspension ability. 6 Dust explosion control
6.1 Explosion mitigation When an explosion occurs, certain measures are taken to limit the spread of the explosion so that the explosion accident does not expand. 6.2 Explosion suppression When an explosion occurs, the flame is extinguished through physical and chemical effects so that the unexploded dust no longer participates in the explosion. Synonyms: Flameproof
6.3 Explosion arrestment
In the passage containing combustible dust, an explosion control technology that can prevent the flame from passing through and block and eliminate waves is set to block the explosion within a certain range.
6.4 Explosion venting of dust explosions When an explosion occurs in a containment containing dust and gaseous oxidants or air, the high-temperature, high-pressure combustion products and unburned materials generated by the explosion are released through the weak parts of the containment to a non-hazardous direction before the explosion pressure reaches the ultimate strength of the containment, so that the containment is not destroyed.
6.5 Vent area
The area of ​​the weak part of the containment that can effectively release the explosion pressure in the containment. o. 6 Ratio of vent area to vessel volume The ratio of the vent area to the volume of the containment. 6.7
Pressure venting membrane A fixed diaphragm embedded in the pressure relief port that can be quickly broken under pressure release. 6.8 Pressure venting valve; pressure venting flap A cover installed on the pressure relief port that can automatically and quickly open under pressure release. 6.9 releasing pressure; venting pressure The internal pressure of a given enclosure when pressure relief can be effectively achieved at a level far less than the ultimate strength of the enclosure. 6.10 flamerrester
An apparatus installed in a pipeline where combustible dust circulates to prevent the passage of dust combustion flames. explosion barrier; explosion arrester6.11
An apparatus installed in a pipeline where combustible dust circulates to block dust explosion waves and flames. 6.12 rapid-action valve for explosion isolation A valve installed in a pipeline where combustible dust circulates, which is normally open under normal circumstances and automatically closes when an explosion occurs, separating the explosion zone from the unexploded zone.
6.13 automatic suppression of explosion A technology that relies on the advance detection of explosion information to forcibly throw flame extinguishing agents onto the flame front to extinguish the flame and prevent the spread of the explosion.
passive suppression of explosion.6.14
Passive explosion isolation
Technology that relies on the power of the shock wave generated by the dust explosion to discard the flame suppressant to form a suppression zone, extinguish the flame that lags behind the shock wave, and prevent the explosion from spreading.
6.15 Suppressor
A device that is equipped with an explosion suppressant and can quickly disperse the flame suppressant under the action of internal pressure. The internal pressure can be the pressure of the stored fluid or 268
GB/T15604—1995
can also be obtained from chemical reactions (such as gases released by explosion or combustion). Flame extinguishing agent extinguishing agent for explosion suppression; suppressant6.16
When in contact with the explosion flame, it can absorb heat, insulate, reduce the oxygen content or eliminate the active groups in the flame, terminate the combustion chain and other physical and chemical effects in a short period of time, so that the explosion cannot continue. Synonym: Explosion-proof agent
Additional explanation:
This standard is proposed by the National Technical Committee for Dust Explosion Prevention Standardization. This standard is drafted by the Chongqing Branch of the China Coal Research Institute. The main drafters of this standard are Ji Qing and Fei Guoyun. 26916
When in contact with the explosion flame, it can absorb heat, insulate, reduce oxygen content or eliminate active groups in the flame, terminate the combustion chain and other physical and chemical effects in a short period of time, so that the explosion cannot continue. Synonym: Explosion-extinguishing agent
Additional instructions:
This standard was proposed by the National Technical Committee for Dust Explosion Prevention Standardization. This standard was drafted by the Chongqing Branch of the China Coal Research Institute. The main drafters of this standard are Ji Qing and Fei Guoyun. 26916
When in contact with the explosion flame, it can absorb heat, insulate, reduce oxygen content or eliminate active groups in the flame, terminate the combustion chain and other physical and chemical effects in a short period of time, so that the explosion cannot continue. Synonym: Explosion-extinguishing agent
Additional instructions:
This standard was proposed by the National Technical Committee for Dust Explosion Prevention Standardization. This standard was drafted by the Chongqing Branch of the China Coal Research Institute. The main drafters of this standard are Ji Qing and Fei Guoyun. 269
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.