Minimum Order Quantity (MOQ): 2,000 bags
If your purchase order says nothing more than “un-certified bulk bag,” you haven’t really specified a bag — you’ve only told the supplier one thing you probably don’t need.
The supplier still needs to know what the bag does need.
What product is going inside?
How much does it weigh?
What’s the bulk density?
How is the FIBC filled?
How is it discharged?
Does the product leak through woven fabric?
Does it need moisture protection?
Does it need a liner?
What safe working load is required?
What electrostatic classification is appropriate?
How will the loaded bag be handled, stored, palletized, and transported?
That’s the real specification.
The phrase “un-certified construction” should never become shorthand for “give me whatever is cheapest.”
A good purchase order removes assumptions and tells the supplier exactly what they’re expected to manufacture.
Here’s how to build one.
An un-certified FIBC is generally a bulk bag that is not being supplied under a particular certification required for a regulated application, such as applicable UN performance certification for dangerous-goods transportation.
That distinction matters.
But it doesn’t define the entire bag.
An un-certified FIBC can still have controlled requirements for:
Safe working load.
Safety factor.
Fabric construction.
Seams.
Top construction.
Bottom construction.
Lifting loops.
Coating.
Liners.
Electrostatic classification.
Food-related construction where applicable.
Printing.
Loaded shape.
Handling.
Documentation.
The certification status is one line in the specification.
It isn’t the specification.
Do this before worrying about fabric, loops, or liners.
Determine whether the material and transportation application require a particular certified packaging system.
If the material is regulated for transportation, involve the appropriate compliance, transportation, EHS, or dangerous-goods personnel.
Don’t guess.
Don’t assume.
And don’t decide based on the fact that the company has historically used ordinary bulk bags.
Determine the actual requirement.
If certification is required, specify the appropriate certified packaging.
If it isn’t, then an un-certified FIBC may be considered.
Put the actual product or material description into the specification process.
The supplier should understand whether they’re designing around:
Powder.
Granules.
Pellets.
Flakes.
Agricultural material.
Recycling material.
Mineral.
Aggregate.
Resin.
Rubber material.
Manufacturing ingredient.
Or another dry bulk product.
You should also communicate relevant product characteristics.
Is it abrasive?
Fine?
Coarse?
Free-flowing?
Prone to bridging?
Moisture-sensitive?
Contamination-sensitive?
Capable of generating combustible dust?
Those characteristics influence the bag.
This is one of the most important numbers on the entire purchase order.
Bulk density tells you how much volume a given weight of product occupies.
Without it, you’re asking the supplier to guess at bag capacity.
Two products can have the exact same target fill weight and require very different FIBC volumes.
One may be dense.
The other may be light and fluffy.
Bulk density influences:
Required capacity.
Loaded height.
Loaded shape.
Stability.
Pallet utilization.
Warehouse storage.
Freight efficiency.
If the density varies, provide a realistic operating range.
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Tell the supplier how much material you actually plan to put into each FIBC.
This is different from simply giving them the maximum weight the bag might theoretically handle.
The supplier needs the real operating target.
Target fill weight and bulk density work together.
Together, they help determine the approximate volume required.
They also influence the loaded package and how it moves through your supply chain.
Don’t make the supplier infer your required load rating.
Specify it.
The safe working load needs to be appropriate for the intended application.
And here’s another mistake to avoid:
Don’t automatically specify a dramatically higher load rating because a bigger number sounds better.
Over-engineering costs money.
Under-engineering creates obvious problems.
The objective is the correct requirement for the actual intended load.
How will the FIBC be used?
Is it intended for a single trip?
Is a particular reuse program being considered?
If reuse is part of the plan, that needs to be addressed during the specification process.
Don’t buy a bag for one intended use and later decide:
“Looks pretty good. Let’s fill it again.”
Visual appearance isn’t enough to establish whether an FIBC should be reused.
Original design, safety factor, handling history, previous contents, condition, company procedures, and other factors can matter.
Define the intended usage up front.
How does product enter the bag?
This should be based on the actual filling process.
A filling spout may be appropriate when connecting to controlled filling equipment.
A duffle top may make sense when broader access is useful.
An open-top construction may be appropriate for other operations.
Don’t write:
“Standard top.”
There’s no reason to leave something this important open to interpretation.
Specify what you need.
Now follow the material downstream.
How does it leave the FIBC?
A discharge spout can provide controlled unloading into hoppers, conveyors, mixers, or other processing equipment.
Other bottom configurations may be appropriate for other applications.
The correct design depends heavily on product behavior.
Does it flow freely?
Does it bridge?
Does it compact?
Does it clump?
Is controlled discharge important?
Design around the process.
Don’t automatically add one.
And don’t automatically eliminate one.
Ask what the product needs.
A liner may be appropriate when additional protection is needed for:
Fine-particle containment.
Moisture.
Contamination.
Product migration.
Defined product-contact requirements.
Other barrier needs.
If none of those problems exist, a liner may simply add cost and complexity.
Use components because they solve problems.
If the bag needs a liner, don’t stop at:
“Include poly liner.”
That’s vague.
Specify what the liner needs to accomplish.
Consider:
Material requirements.
Barrier requirements.
Thickness or performance requirements where applicable.
Product compatibility.
Filling performance.
Discharge performance.
How the liner is incorporated into the FIBC.
Electrostatic requirements where applicable.
Food-contact requirements where applicable.
The liner and FIBC should function as one package.
Does the product require additional containment?
Coated woven fabric may help with fine-particle containment and provide additional resistance to moisture migration through the fabric.
Uncoated construction provides different breathability characteristics.
Don’t automatically copy whatever your previous bag used.
Ask why.
If coating solves a problem, specify it.
If nobody knows why it’s there, investigate before paying for it forever.
This is a separate requirement from transportation certification.
An FIBC can be un-certified in the transportation-certification sense while still requiring a particular electrostatic construction.
The appropriate type should follow the product and process hazard assessment.
| FIBC Type | ⚡ General Electrostatic Approach |
|---|---|
| Type A | No special electrostatic protection |
| Type B | Designed to prevent certain energetic discharges |
| Type C | Conductive and requires proper grounding |
| Type D | Static dissipative without grounding the FIBC itself |
Don’t write:
“Antistatic bulk bag.”
That’s not specific enough.
If an electrostatic-control FIBC is required, specify the appropriate type.
Some dry powders can create combustible-dust hazards under certain conditions.
Material movement during filling and discharge can also generate electrostatic charge.
If this is relevant to your process, involve the appropriate safety personnel.
The FIBC type should be selected based on the actual hazard conditions.
Don’t let procurement independently guess at an electrostatic classification because one option happens to cost less.
This is one area where the process requirements need to drive purchasing.
If the application requires Type C construction, remember that the bag needs to be used as intended.
Type C FIBCs require proper grounding during filling and discharge.
That means the plant needs appropriate:
Grounding procedures.
Connections.
Equipment.
Operator training.
Verification.
The purchase order defines the bag.
The operating procedure makes sure the bag is used correctly.
Both matter.
Type D FIBCs are designed to dissipate electrostatic charge without requiring the FIBC itself to be grounded.
That can simplify operations in suitable applications.
But don’t interpret Type D as:
“No electrostatic precautions required.”
Nearby conductive objects, equipment, personnel, liners, product characteristics, and environmental conditions can still matter.
Specify the correct bag as part of the overall hazard-control system.
Here’s an easy mistake to make.
Engineering approves the electrostatic FIBC.
Purchasing later adds a liner.
Nobody checks whether the complete combination is appropriate.
Don’t do that.
If you require both an electrostatic-control FIBC and a liner, specify them together.
The supplier should evaluate the package as a complete construction.
Un-certified transportation construction doesn’t automatically mean the bag can’t be designed for food applications.
These are different requirements.
If you’re packaging a food ingredient, define the applicable product-contact, manufacturing-control, contamination-control, documentation, and traceability requirements separately.
Likewise, don’t assume that a bag meeting some other certification automatically satisfies food-contact requirements.
Build the specification in layers.
How will the FIBC actually be lifted?
Forklift?
Hoist?
Filling equipment?
Specialized handling system?
Loop configuration affects:
Operator access.
Filling.
Lifting.
Forklift handling.
Discharge.
Plant efficiency.
Don’t overlook it because loops look like a minor detail.
Operators touch those loops every single time the bag moves.
Here’s where procurement can quietly save serious money.
A standard FIBC may bulge outward when loaded.
That may be perfectly acceptable.
But if excessive bulging wastes pallet or trailer space, you may want to evaluate a design that maintains a more rectangular loaded profile.
Baffle construction is one option.
Baffles can improve:
Pallet utilization.
Warehouse density.
Truck utilization.
Container utilization.
Handling consistency.
But they add cost.
Use them when the logistics savings justify the additional construction.
Don’t design the FIBC in isolation.
What pallet will support it?
How does the loaded footprint fit?
Does the bag hang over the pallet?
Does it leave a large amount of unused space?
Does it become unstable?
How will forks access the load?
How will the customer handle it?
The bag, product, and pallet should be considered as one loaded unit.
This is where a few minutes of engineering can beat hours of price negotiation.
Consider:
Loaded footprint.
Loaded height.
Product weight.
Bulging.
Pallet utilization.
Trailer cube.
Container cube.
Stacking limitations.
Transportation method.
Nationwide distribution requirements.
A slightly more expensive FIBC can be dramatically cheaper overall if it allows more product to move efficiently per shipment.
Don’t optimize the empty bag.
Optimize the loaded supply chain.
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What needs to appear on the bag?
Company branding?
Product identification?
Part number?
Lot information?
Handling instructions?
Safety information?
Customer-specific markings?
Electrostatic classification markings where applicable?
Define the artwork.
Control the artwork revision.
And approve it before production.
You don’t want thousands of bags arriving with an old company name, outdated handling instruction, or incorrect product information.
Un-certified doesn’t mean documentation doesn’t matter.
You may still require:
Certificate of conformance.
Material information.
Test information.
Approved drawings.
Quality documentation.
Food-related documentation where applicable.
Electrostatic documentation where applicable.
Customer-specific records.
Inspection records.
Whatever your organization requires should be identified before production.
Don’t wait until receiving asks for paperwork.
Here’s a simple purchasing mistake that destroys quote comparisons.
Supplier A quotes delivered.
Supplier B quotes FOB.
Supplier C excludes freight.
Purchasing sees three unit prices and picks the cheapest.
Except they’re not comparing the same thing.
Define the delivery basis on the RFQ and purchase order.
If you want delivered pricing, say so.
If you want another freight arrangement, define it.
Get everyone quoting on the same basis.
Once the bag is engineered correctly, create a controlled reference.
This can be:
An approved supplier drawing.
An internal specification.
A controlled part number.
A revision number.
Or another formal system.
Then reference it on every purchase order.
This is one of the simplest ways to prevent specification drift.
Let’s say you’ve ordered the same FIBC for two years.
Then the supplier proposes a material change.
Or a different liner.
Or another fabric construction.
Or a modified top.
Maybe the change is completely fine.
Maybe it’s better.
But somebody should review it.
Meaningful changes should not silently become the new specification.
Control revisions.
Know what changed.
Approve it.
Then update the controlled drawing.
Here’s the practical checklist.
| Purchase Order Requirement | Include? |
|---|---|
| 📦 Un-certified construction requirement | Yes |
| 🧱 Product/material | Yes |
| ⚖️ Bulk density | Yes |
| 🎯 Target fill weight | Yes |
| 🏋️ Safe working load | Yes |
| 🔁 Intended usage | Yes |
| ⬆️ Top construction | Yes |
| ⬇️ Bottom construction | Yes |
| 🧴 Liner | If required |
| 🧵 Coated/uncoated | Yes |
| ⚡ Electrostatic classification | If applicable |
| 🍎 Food-related construction | If applicable |
| 🏗️ Lifting configuration | Yes |
| 📦 Loaded-shape requirement | If applicable |
| 🖨️ Printing | If applicable |
| 📄 Documentation | As required |
| 🚚 Delivery basis | Yes |
| 📋 Approved drawing/revision | Yes |
If those requirements are clearly defined, suppliers have much less room to interpret the order differently.
The exact wording should follow your company’s technical and purchasing requirements, but conceptually the PO should identify:
Construction: Un-certified FIBC construction for the specified non-regulated application, subject to confirmation of applicable transportation requirements.
Product: Identify the material being packaged.
Bulk Density: State the operating bulk density or range.
Target Fill Weight: State the normal operating fill weight.
Load Requirement: State the required safe working load and intended usage.
Top: Specify the exact filling configuration.
Bottom: Specify the exact discharge configuration.
Fabric: Specify coated or uncoated construction and other required fabric characteristics.
Liner: Specify the liner requirements or clearly state none if appropriate.
Electrostatic Type: Specify Type A, B, C, or D where required by the application.
Lifting: Specify the required loop configuration.
Printing: Reference approved artwork.
Documentation: List all required documents.
Drawing: Reference the approved drawing and current revision.
Delivery: State the agreed delivery basis.
That gives the supplier something they can actually manufacture against.
The first mistake is writing:
“Un-certified super sack.”
The second is assuming un-certified means unregulated without actually verifying the product classification.
The third is forgetting bulk density.
The fourth is giving target fill weight but no safe working load requirement.
The fifth is writing “standard top” and “standard bottom.”
The sixth is specifying “poly liner” without defining what the liner needs to accomplish.
The seventh is ignoring electrostatic requirements.
The eighth is adding a liner to an electrostatic-control FIBC without evaluating the complete construction.
The ninth is ignoring loaded shape.
The tenth is ignoring the pallet.
The eleventh is comparing delivered and non-delivered quotes as if they’re equivalent.
The twelfth is failing to reference an approved drawing.
And the thirteenth is letting suppliers change the construction without revision control.
Most of these cost almost nothing to prevent.
Normalize the specification before comparing price.
| Requirement | Supplier A | Supplier B |
|---|---|---|
| 📦 Same construction | ✓ | ✓ |
| ⚖️ Same bulk-density basis | ✓ | ✓ |
| 🎯 Same target fill | ✓ | ✓ |
| 🏋️ Same load requirement | ✓ | ✓ |
| ⬆️ Same top | ✓ | ✓ |
| ⬇️ Same bottom | ✓ | ✓ |
| 🧴 Same liner | ✓ | ✓ |
| 🧵 Same coating | ✓ | ✓ |
| ⚡ Same electrostatic type | ✓ | ✓ |
| 🖨️ Same printing | ✓ | ✓ |
| 📄 Same documentation | ✓ | ✓ |
| 🚚 Same delivery basis | ✓ | ✓ |
Now you have a legitimate price comparison.
If one supplier is 15% cheaper, fantastic.
Find out why.
Maybe they’re genuinely more competitive.
Or maybe they quietly removed three things from the specification.
When developing a new FIBC, samples can expose problems drawings won’t.
Put the sample on the filling equipment.
Check the top.
Check the liner.
Check the loops.
Fill it with the actual product where appropriate.
Observe the loaded shape.
Check the pallet.
Move it with the forklift.
Store it.
Discharge it.
Ask operators what doesn’t work.
Ask warehouse personnel what doesn’t work.
Ask quality what doesn’t work.
Then fix those problems before full production.
A sample isn’t a replacement for required engineering, testing, certification, or hazard assessment.
It’s an operational validation tool.
This is where procurement gets dangerous.
Supplier A saves you a little money per FIBC.
Fantastic.
Except Supplier A’s bag fills slower.
Leaks more.
Leaves more residual product.
Uses more warehouse space.
Bulges off the pallet.
Fits fewer loaded units efficiently into transportation.
Now how much did you save?
The real calculation should include:
Bag cost.
Freight.
Labor.
Filling efficiency.
Discharge efficiency.
Product loss.
Storage.
Handling.
Downtime.
Inventory.
Reliability.
Customer acceptance.
Optimize the system.
Not one line on the spreadsheet.
Before releasing the order, verify four areas.
Product: Material classification, bulk density, target fill weight, flow characteristics, moisture sensitivity, particle characteristics, and relevant hazards.
FIBC: Un-certified status where appropriate, safe working load, intended use, top, bottom, liner, coating, lifting configuration, electrostatic classification, printing, and loaded shape.
Operations: Filling equipment, discharge equipment, forklift handling, pallets, warehouse storage, stacking, and reuse requirements.
Supply Chain: Transportation requirements, customer requirements, certification requirements, freight efficiency, documentation, delivery basis, and nationwide distribution needs.
If those four categories are covered, you’ve dramatically reduced the supplier’s need to guess.
Don’t write:
“Un-certified bulk bags — 5,000 pieces.”
and call it a specification.
First determine whether un-certified construction is actually appropriate for the material and transportation application.
Then tell the supplier exactly what the FIBC needs to do.
Identify the product.
Provide the bulk density.
Provide the target fill weight.
Specify the correct safe working load.
Define the intended usage.
Specify the top.
Specify the bottom.
Define the liner.
Define coated or uncoated construction.
Specify the electrostatic classification where applicable.
Specify food-related requirements where applicable.
Define the lifting configuration.
Optimize the loaded shape.
Consider the pallet.
Consider transportation.
Control printing.
Define documentation.
Define delivery basis.
Reference an approved drawing.
Control revisions.
And make every supplier quote against the same specification.
Because un-certified does not mean un-specified.
It means you’re removing a certification requirement your application doesn’t need while keeping every construction requirement it does need.
That’s how you get a simpler FIBC without getting the wrong FIBC.
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