BS EN IEC 61340-4-4 : 2018现行

This part of IEC 61340 specifies requirements for flexible intermediate bulk containers (FIBCbetween 0,25 m3 and 3 m3 in volume, intended for use in hazardous explosive atmospheres.The explosive atmosphere can be created by the contents in the FIBC or can exist outside theFIBC.The requirements include:– classification and labelling of FIBC;– classification of inner liners;– specification of test methods for each type of FIBC, inner liner, labels and documentpockets;– design and performance requirements for FIBC, inner liners, labels and document pockets;– safe use of FIBC (including those with inner liners) within different zones defined forexplosion endangered environments, described for areas where combustible dusts are, orcan be, present (IEC 60079-10-2), and for explosive gas atmospheres (IEC 60079-10-1);– procedures for type qualification and certification of FIBC, including the safe use of innerliners.NOTE 1 Guidance on test methods that can be used for manufacturing quality control is given in Annex C.The requirements of this document are applicable to all types of FIBC and inner liners, testedas manufactured, prior to use and intended for use in hazardous explosive atmospheres:Zones 1 and 2 (Groups IIA and IIB only) and Zones 21 and 22 (see Annex D for classification of hazardous areas and explosion groups). For some types of FIBC, the requirements of this document apply only to use in hazardous explosive atmospheres with minimum ignition energy of 0,14 mJ or greater and where charging currents do not exceed 3,0 μA. NOTE 2 0,14 mJ represents a realistic minimum ignition energy for a Group IIB gas or vapour atmosphere. Although more sensitive materials exist, 0,14 mJ is the lowest minimum ignition energy of any material that is likely to be present when FIBC are emptied. 3,0 μA is the highest charging current likely to be found in common industrial processes. This combination of minimum ignition energy and charging current represents the most severe conditions that might be expected in practice. FIBC are not normally used in Zone 0 or Zone 20. If FIBC are used in Zone 0 or Zone 20, the requirements of this document are applicable, together with additional requirements that are beyond the scope of this document to define. The volume contained within FIBC can be designated as Zone 20, in which case the requirements of this document are applicable.Solids containing residual solvent can result in a hazardous explosive atmosphere within FIBC, possibly resulting in the volume being designated as Zone 1 or Zone 2; in which casee requirements of this document are applicable.Compliance with the requirements specified in this document does not necessarily ensure thathzardous electrostatic discharges, for example cone discharges, will not be generated by thecontents in FIBC. Information on the risks associated with cone discharges is given inAnnex E.Compliance with the requirements of this document does not mitigate the need for full riskassessment. For example, metal and other conductive powders and toner powders canrequire additional precautions to prevent hazardous discharges from the powders.NOTE 3 In the examples mentioned in the paragraph above, additional precautions can be necessary in the caseof metal or other conductive powder because if the powder is isolated and becomes charged, incendiary sparks canoccur, and in the case of toner powders, incendiary discharges can occur during rapid filling and emptyingoperations. IEC TS 60079-32-1 [1]1 gives guidance on additional precautions that can be necessary.Test methods included in this document can be used in association with other performancerequirements, for example when a risk assessment has shown the minimum ignition energy ofconcern is less than 0,14 mJ, charging currents are greater than 3,0 μA, or the ambientconditions are outside of the range specified in this document.Compliance with the requirements specified in this document does not necessarily ensure thatelectric shocks to personnel will not occur from FIBC during normal use.

IEC 61340-4-4 : 2.1 - Identical

EN IEC 61340-4-4 : 2018 - Identical