As we all know, explosion protection is an important guarantee for safe production. We must first understand what an explosion can really do to prevent explosions.
I. Basic conditions for explosion (explosion triangle principle)
1. Explosive substance 2. Air (oxygen)
3. Ignition source (such as spark, hot surface)
Second, the basic method of preventing <br> <br> explosion avoid the formation of explosive atmosphere - the ideal way to exclude / slashing possible sources of ignition - practical approach
III. Common explosion-proof certification bodies and systems:
EU: ATEX/IECEx
North America: NEC-500/NEC-505
Russia and CIS: GOST
China: NEPSI/PCEC
Brazil: INMETRO
4. The main electrical explosion-proof technologies accepted by China are:
1. Flameproof (Exd)
2. Intrinsically Safe (Exia/ib)
3. Increased safety (Exe)
4. Positive pressure type (Expx, py, pz)
5. Oil type (Exo)
6. Sand filling type (Exq)
7.n type (ExnA, nC, nL, nR, nZ)
8. Encapsulation type (Exma, mb)
9. Dust explosion protection (DIPA/B-tD)
10. Others (such as mine cap lamp, heating cable)
V. Explosion proof mark meaning Description:
ExiaIICT4Gb
Ex: Explosion-proof ia: Intrinsically safe IIC: The gas group, the gas is divided into different groups according to the difference of the minimum ignition energy T4: temperature class, is an important technical parameter of the explosion-proof electrical equipment The temperature class T6 is a high grade. Temperature group is compatible from high to low.
I. Basic conditions for explosion (explosion triangle principle)
1. Explosive substance 2. Air (oxygen)
3. Ignition source (such as spark, hot surface)
Second, the basic method of preventing <br> <br> explosion avoid the formation of explosive atmosphere - the ideal way to exclude / slashing possible sources of ignition - practical approach
III. Common explosion-proof certification bodies and systems:
EU: ATEX/IECEx
North America: NEC-500/NEC-505
Russia and CIS: GOST
China: NEPSI/PCEC
Brazil: INMETRO
4. The main electrical explosion-proof technologies accepted by China are:
1. Flameproof (Exd)
2. Intrinsically Safe (Exia/ib)
3. Increased safety (Exe)
4. Positive pressure type (Expx, py, pz)
5. Oil type (Exo)
6. Sand filling type (Exq)
7.n type (ExnA, nC, nL, nR, nZ)
8. Encapsulation type (Exma, mb)
9. Dust explosion protection (DIPA/B-tD)
10. Others (such as mine cap lamp, heating cable)
V. Explosion proof mark meaning Description:
ExiaIICT4Gb
Ex: Explosion-proof ia: Intrinsically safe IIC: The gas group, the gas is divided into different groups according to the difference of the minimum ignition energy T4: temperature class, is an important technical parameter of the explosion-proof electrical equipment The temperature class T6 is a high grade. Temperature group is compatible from high to low.
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