|Bulk product in FIBC||Surrounding|
|MIE of dust||Non-flammable atmosphere||Dust zones 21-22
(1000 mJ ≥ MIE > 3 mJ)
|Gas zones 1-2 (Groups IIA/IIB) or
Dust zones 21-22 (MIE ≤ 3mJ)
|MIE > 1000 mJ||A, B, C, D||B, C, D||C, D|
|1000 mJ ≥ MIE > 3 mJ||B, C, D||B, C, D||C, D|
|MIE ≤ 3 mJ||C, D||C, D||C, D|
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Note: There is no official standard classification, “Groundable Type D”, D+, Dplus or CD. IEC 61340-4-4 Ed. 2.0 & Ed. 3.0 do not permit FIBC to be labelled as D+, CD, etc. Only the official classifications, i.e. Type A, Type B, Type C or Type D can be indicated on FIBC labels. One FIBC cannot be simultaneously classed as more than one type. So, for example, classing FIBC as both Type C and Type D, or labelling as C/D, etc. is not permitted by IEC 61340-4-4 Ed. 2.0 or Ed. 3.0.