Conductive Big Bags

Conductive or Antistatic Big Bags

When charged or discharged, the friction between particles of some elements in the Big Bags can generate static electricity that can cause electric discharge sparks. This is especially dangerous if the products handled are explosive or if there are flammable products or gases in the work environment.

Conductive or Antistatic Big Bags have elements that allow static electricity to be discharged in one way or another, allowing safe handling of their contents.

From the risk of electrostatic ignition point of view, Big Bags can be classified into four different types according to their fabric and construction method

Conductive Big Bag 3

Type A Type B
or Antistatic
Type C
or Conductive
Type D
or Dissipative
Description Type A Big Bags do not have any special characteristics for the discharge of static electricity and therefore should not be used in environments with flammable or potentially explosive dusts or vapors. Type B or Antistatic Big Bags are similar to Type A and are also made of antistatic polypropylene fabric, which must withstand a breakdown voltage of 4 kilovolts or less. Type C Big Bags are constructed of electrically conductive fabric or standard fabric with electrically conductive or antistatic coating. Alternatively, standard fabric with some conductive threads can be used. In any case, a grounding conductor equipment must be connected during the filling and emptying of the Big Bag. Type D Big Bags have antistatic or static dissipative properties without the need for grounding. Unlike type C designs, the wires are not interconnected and mostly have a static-dissipative coating. For the safe use of these Big Bags, it is necessary to follow some procedures and regulations such as the grounding of machinery and people around them and some restrictions regarding the environment in which they are handled.
Aplication Non-combustible products in non-flammable environments. When loaded and unloaded in environments with NON-explosive or flammable gases or vapors, some flammable products. Some flammable products are charged or discharged in inflammable environments with gas or vapor greater than or equal to 0.14 mJ. Some flammable products are charged or discharged in flammable gas or vapor environments of ignition energy less than 0.14 mJ.

Types of Big Bags to be used depending on the surrounding environment, especially when filling and emptying them:

Minimum Ignition Energy
(MIE or EMI in Spanish)
Non-flammable atmosphere Dust explosive atmosphere Explosive gas or vapor atmosphere
EMI > 1000 mJ A, B, C and D B, C and D C and D
1000 mJ > EMI > 3 mJ B, C and D B, C and D C and D
EMI < 3 mJ C and D C and D C and D

General Warnings

  • Do not use Big Bags in the presence of flammable atmospheres with ignition energies lower than 0.14 mJ.
  • Do not use Big Bags in the presence of hydrogen, acetylene, and carbon sulfide (group IIC according to EN 50014).
  • To avoid incendiary spark discharges on the surface of Type B and D Big Bags, they must not be contaminated or coated with conductive materials (e.g. water, grease, or oil).
  • Additional precautions are required in the presence of flammable gas or vapor atmospheres (e.g. in the case of wet solvent dusts).
  • It is important to act according to the best safe working practices and regulations in force with any Big Bags working in environments with combustible dust and/or flammable vapor and gas atmospheres, using grounding of all conductive materials, equipment, and personnel near the Big Bags.
  • Consult Multisac for more information on the use of antistatic or dissipative Big Bags.
  • All conductive objects in the vicinity of a Type D FIBC must be grounded.