① 国标的ExiaIIAT4的防爆标准，等同于日本防爆的什么等级，最好能提供日本的防爆标准
应该是e1G4。
Protection methods:
d = flameproof (same concept as in IEC 60079-1, 1990)
e = increased safety (same concept as in IEC 60079-7, 1990)
i = intrinsic safety (same concept as in IEC 60079-11, 1991)
o = oil immersion (same concept as in IEC 60079-6, 1968)
p = pressurization (same concept as in IEC 60079-2, 1983)
Note - The protection methods: 'm', 'q', and 'n', have not yet been adopted by the MHLW, and therefore are not available as a certification option through TIIS.
Explosion grades (Gas groups in IEC):
1 = propane (same as IIA in IEC)
2 = ethylene (same as IIB in IEC)
3a = hydrogen (same as IIB + H2 in IEC)
3b = carbon disulfide (IIB + CS2 in IEC)
3c = acetylene (IIB + C2H2 in IEC)
3n = all the gases in grade 3 (same as IIC in IEC)
Ignition categories (Temperature codes in IEC):
G1 = 450° (same as T1 in IEC) × 0.8 - 40°C = 320°C rise
G2 = 300°C (same as T2 in IEC) × 0.8 - 40°C = 200°C rise
G3 = 200°C (same as T3 in IEC) × 0.8 - 40°C = 120°C rise
G4 = 135°C (same as T4 in IEC) × 0.8 - 40°C = 68°C rise
G5 = 100°C (same as T5 in IEC) × 0.8 - 40°C = 40°C rise
G6 = 85°C (same as T6 in IEC) × 0.8 - 40°C = 28°C rise
这些标准可以在一些技术资料网站上能下载，但是要花钱。