FIBC Static Safety & Grounding: How to Handle Anti-Static Bulk Bags

Rule one: match the bag to the hazard zone, then handle it the way that bag demands. A Type C FIBC must be grounded to work; a Type D FIBC must not be. Type A and Type B offer no anti-static protection and belong nowhere near a flammable atmosphere. Below is the practical routine our team ships with every anti-static order.

Know your hazard zone first

Before choosing a bag, classify the environment by the risk of an ignitable mix of dust or vapour. Powders such as fine plastics, flour, sugar, carbon black and many chemicals can form explosive dust clouds; solvents add a vapour risk. In any Zone where ignition is possible, you need a bag with verified static-protective performance — Type C or Type D — and documented handling.

Grounding a Type C FIBC (step by step)

1. Verify the earth point before the bag arrives. The grounding point must be a real, low-resistance earth (building ground, not a painted rail).
2. Connect the bag's grounding tab (a dedicated conductive strap, not the lift loops) to that earth before you start filling.
3. Keep it connected through filling, transfer and discharge. Only disconnect after the bag is empty and settled.
4. Check continuity with a meter per IEC 61340-4-4, and train operators so a "forgotten ground" never happens.
5. Inspect the conductive path for damage or contamination before each use.

Type D: no ground, but keep it clean

Type D dissipates charge by safe corona discharge to the surrounding air, so it needs no earth. Two cautions: do not ground it (that defeats the design), and keep the fabric free of conductive contamination such as water, grease or metal dust that could bridge the surface. In normal plant conditions it is the simplest safe choice where a reliable ground cannot be guaranteed — mobile filling, non-conductive silos, or sites worried about human error.

Filling and discharge rules that matter

• Control fill rate and avoid free-fall drop of powder where possible — slower flow means less charge separation.
• Keep the spout and receiver in contact to avoid sparks across a gap.
• Bond/ground metal equipment (hoppers, conveyors, drums) in the same loop as a Type C bag.
• Eliminate ignition sources nearby: open flames, hot surfaces, non-rated electrical gear.
• Use inert gas or vacuum only where the process requires it; consult the material SDS.

Common mistakes we see

Mistake	Why it is dangerous	Fix
Using a Type A bag in a dusty zone	No static protection at all	Use Type C (grounded) or Type D
Grounding a Type D bag	Defeats corona design	Leave Type D ungrounded, keep clean
Grounding through lift loops	Loops may not be conductive	Use the dedicated grounding tab
Forgetting to reconnect after a move	Ungrounded Type C is unsafe	Checklist + meter at every fill

Frequently asked