Conductive surface
For Type C; requires the specified earth connection.
Review the complete bag and liner
Electrostatic Liners
Know the classification.
Confirm the combination.
Start with your product and operating environment. Bulk-Pack can help review liner requirements, outer FIBC construction, installation, and supporting documentation with your technical team.
Technical note: The four liner classifications are defined under IEC 61340-4-4:2018. Their electrostatic properties cannot be reliably identified by appearance alone. The image is a product illustration, not evidence of compliance or certification.
IEC 61340-4-4:2018Four liner classifications.
Four liner classifications.
A defined technical framework.
The standard covers electrostatic classification and testing of FIBCs and inner liners. Its 2018 edition distinguishes L1C multilayer liners with conductive internal layers.
Conductive internal layer
Separate multilayer classification; for Type C with specified bonding.
Dissipative liner
Potential combinations with B, C, and D depend on their requirements.
Insulating liner
For Type B only within the standard’s liner requirements.
Reference: IEC 61340-4-4:2018 — official standard overview ↗. Classification summaries omit detailed material limits and test conditions.
Compare the intended combinationLiner type and bag type.
Liner type and bag type.
Both matter.
Overview for hazardous explosive atmospheres under IEC 61340-4-4:2018, Clause 4.3 and Table 6.
| Liner | Type B FIBC | Type C FIBC | Type D FIBC |
|---|---|---|---|
| L1 | Not permitted | Conditional: earth bonding | Not permitted |
| L1C | Not permitted | Conditional: earth bonding | Not permitted |
| L2 | Conditional | Conditional: earth bonding | Conditional: tested combination |
| L3 | Conditional | Not permitted | Not permitted |
Conditions matter. Type C combinations need specified earthing connections; incidental contact is insufficient. Type D/L2 needs ignition testing of the combination. Adding a liner does not change the outer bag’s type. Bag and liner breakdown-voltage requirements apply separately.
A reference for review, not an application approval. Review your actual bag, liner, process hazards, installation, and current documentation with a qualified electrostatics professional and the manufacturer before use. Bulk-Pack can help you work through the specification and testing questions.
The Bulk-Pack differenceBring the documents.
Bring the documents.
Let’s review the details.
Our 45+ years of FIBC manufacturing and sales experience help connect practical bag design questions with your technical requirements.
Product & environment
Share the product, dust ignition information, solvent or vapor exposure, filling temperature, and the site’s process hazard assessment.
Bag & liner identity
Provide the bag classification, liner classification, manufacturer documentation, drawings, material structure, and thickness.
Electrical test records
Request the applicable surface-resistivity, breakdown-voltage, bonding, and combination-test records for the actual proposed construction.
Installation & connections
Show the attachment arrangement, designated connections, filling and discharge details, and equipment interfaces for review.
Contact & barrier needs
Include food-contact requirements, moisture or oxygen protection, closure details, and any proposed foil or other multilayer construction.
Changes & supply
Identify any change in film, thickness, source, shape, attachment, or outer bag. Include approval requirements, quantities, and delivery needs.
Start with your existing specification.
Include the bag and liner drawings, test reports, application description, and the changes you want to make.
Share Your Specifications ↗Knowledge for your operationKeep the references.
Keep the references.
Confirm the tested design.
Use the full standard and construction-specific records for the technical review.
IEC standard
Official scope, edition information, and access to IEC 61340-4-4:2018.
IEC 61340-4-4 ↗Specialist testing
DEKRA describes electrostatic tests for FIBCs and liners, including resistivity and breakdown voltage.
DEKRA Electrostatic Testing ↗Reference library
Find additional FIBC design, handling, and documentation resources.
Explore All Resources ↗Common questionsClear documentation.
Clear documentation.
A better liner review.
Is “antistatic” enough to specify a liner?
Ask for the actual liner classification and supporting documentation. A general sales description does not identify which bag-and-liner arrangement has been evaluated.
Does liner colour identify its electrostatic performance?
Specify the required classification and request test records for the proposed construction. Do not use appearance as a substitute for documentation.
Can we substitute a different liner?
Send the proposed change for review before use. Include the material, thickness, supplier documentation, attachment details, and the outer FIBC specification.
Can a barrier or foil liner be included?
Share the complete layer structure and application requirements. Ask for an evaluation of the proposed laminate within the intended bag design rather than assuming barrier performance establishes electrostatic suitability.
What if we do not have a liner test report?
Share the information you have with Bulk-Pack. We can help identify which documentation and specialist testing questions need to be resolved before selecting a combination.
Can you help review our existing specification?
Yes. Send the bag and liner drawings, product and process information, operating conditions, current test reports, and any proposed changes. Include your site’s technical requirements.
Let’s talk packagingLet’s review your
Let’s review your
bag and liner combination.
Share your material, process hazard assessment, FIBC type, liner classification, construction drawings, test reports, earthing arrangements, operating environment, and quantity.