Type C vs Type D FIBCs – Static Safety Compared

When packaging flammable powders or operating in combustible dust zones, the right FIBC bulk bag isn’t just a recommendation—it’s a requirement. Type C and Type D bags are designed to protect against electrostatic discharge, which can cause ignition during filling, stacking, or discharge. But how do you choose the right one?

What Is a Type C Bulk Bag?

Type C bulk bags are made from conductive fabric with interwoven carbon threads. They require a grounding connection during use to safely dissipate static electricity. If they’re not properly grounded, they can become a serious ignition hazard.

What Is a Type D Bulk Bag?

Type D bulk bags use dissipative fabric that safely discharges static into the atmosphere—without requiring grounding. They’re ideal for environments where grounding is difficult or workers may forget to attach ground cables.

Key Differences: Type C vs Type D

- **Grounding Required:** Yes for Type C, No for Type D
- **Materials:** Type C uses conductive thread; Type D uses dissipative polymers
- **Failure Risk:** Type C is only safe when grounded; Type D provides passive safety
- **Environments:** Type D is preferred in dusty or hard-to-control work zones

When to Use Each Type

Use **Type C** if:
- You can reliably ground every bag during use
- Your facility has trained staff and strict compliance processes

Use **Type D** if:
- Grounding isn’t practical (field work, variable sites)
- You want added safety through passive static dissipation

Why Static Safety Isn’t Optional

Combustible dust is a major cause of industrial fires. OSHA, ATEX, and IEC regulations require static-control packaging for flammable solids. Choosing the correct FIBC helps prevent arc ignition, fines, and workplace injuries.

Need Help Choosing Between Type C and D?

CAPRO offers UN-rated, tested, and documented Type C and D FIBCs for chemical, food, and pharmaceutical clients. We’ll guide you through certification, handling procedures, and safe stacking practices.