Minimum Order Quantity (MOQ): 2,000 bags
Writing “4 corner loops” on an FIBC purchase order is not enough if those loops need to fit a specific forklift, filling frame, suspension system, or discharge station — because the supplier needs to know which complete bag construction and loop geometry you’re actually approving.
This is one of those purchasing details that looks ridiculously simple.
Four loops.
One on each corner.
Send the PO.
Done.
Except that’s exactly how you end up with 2,000 bags that technically match the words on the purchase order but don’t handle like the bag your plant expected.
The loop height can be different.
The usable opening can be different.
The position can be different.
The bag footprint can change.
The filling frame may not align correctly.
The forklift operator may suddenly need extra help positioning loops.
The cure is simple:
Specify the complete FIBC, then control the corner-loop configuration through an approved drawing and revision.
Corner loops are lifting loops positioned at or along the upper corner areas of an FIBC.
They provide lifting points for appropriate handling equipment.
Depending on the manufacturer and FIBC construction, the loops may be incorporated into the corner or seam structure in different ways.
That last sentence matters.
The words “corner loops” describe the general lifting configuration.
They don’t necessarily define every construction detail.
That’s what the approved FIBC specification and drawing are for.
The loops are part of the lifting system.
They’re connected operationally to:
The FIBC body.
Safe working load.
Forklift.
Filling equipment.
Suspension system.
Bag footprint.
Bag height.
Discharge equipment.
Facility headroom.
Operator workflow.
If any of those variables matter to your operation, your purchasing specification needs to control the bag well enough to reproduce the approved design.
Don’t begin an RFQ with:
“Need corner-loop bulk bags.”
Start with the product.
Relevant product information may include:
Material being packaged.
Bulk density.
Flow characteristics.
Particle characteristics.
Fine-powder concerns.
Moisture concerns.
Food-related requirements.
Electrostatic considerations.
The product determines the package.
The loops are one component of that package.
Bulk density helps determine the volume needed to reach your target fill weight.
That’s important because volume influences:
Bag footprint.
Bag height.
Loaded shape.
Center of gravity.
Pallet utilization.
Handling.
Those factors can influence how the lifting configuration behaves in the real operation.
How much product should each FIBC contain?
Write it down.
Don’t use:
“Fill it pretty full.”
Or:
“About the same as our old bag.”
Define the intended fill.
The manufacturer needs to understand the actual application.
Safe working load should be appropriate for the intended filled load and application.
Do not determine SWL by looking at:
Loop width.
Loop thickness.
Loop color.
Loop appearance.
Bag size.
The entire FIBC construction matters.
Specify the required SWL directly.
The supplier should understand how the FIBC will be used.
Is it intended for a particular handling cycle?
Will it be suspended during filling?
Moved by forklift?
Palletized?
Suspended during discharge?
Handled by the customer?
These operational details can affect the design.
Now define the general lifting configuration.
For example:
Lifting Configuration: Four corner lifting loops.
That’s the starting point.
Then define or reference the details that actually matter.
Loop height can affect compatibility with:
Forklift tines.
Filling frames.
Hooks.
Support arms.
Discharge equipment.
Available headroom.
If your operation requires a specific loop height, put it on the approved drawing.
Don’t rely on the supplier’s default.
What needs to engage the loop?
A forklift tine?
A hook?
A filling-frame support?
Another lifting component?
The usable opening needs to work with that equipment.
If this dimension matters, control it.
Call or Text us at 832.400.1394
Corner-loop position needs to make sense relative to the complete FIBC body.
If exact positioning matters for:
Filling equipment.
Forklift.
Suspension.
Discharge equipment.
show it on the approved drawing.
Orientation can influence how easily the loop is presented to the handling equipment.
This becomes particularly important when you’re trying to duplicate an existing FIBC that already works well.
Don’t say:
“Same type of loops.”
Show the supplier the controlled design.
This is where buyers accidentally create problems.
Suppose you change the bag footprint.
The loop position may now change relative to:
Forklift tines.
Filling-frame support points.
Pallet.
Suspension equipment.
The new FIBC may technically still have corner loops.
But the handling geometry can be different.
Review both together.
Your FIBC body has a height.
Then the loops extend above it.
Then the bag is lifted.
Now ask:
How much vertical space do we really need?
Evaluate:
Warehouse ceiling.
Doorways.
Racking.
Filling equipment.
Discharge equipment.
Overhead obstructions.
The body height alone doesn’t answer that question.
The purchase order should identify or reference the approved body construction.
Depending on the application, that could involve a:
U-panel construction.
Four-panel construction.
Circular or tubular woven construction.
Other approved configuration.
The body construction and lifting-loop construction are related but separate specification elements.
Fabric requirements should be controlled as part of the complete FIBC.
Don’t assume the phrase “corner loop bag” tells the supplier everything else about the construction.
It doesn’t.
If the application requires coated or uncoated fabric, state it.
Coating may be selected for product-containment or barrier-related reasons.
It has a different function from the lifting loops.
Specify both independently.
The filling top should match the actual filling process.
Possible constructions may include:
Filling spout.
Duffle top.
Open top.
Other application-specific configurations.
Then make sure the corner loops work with that top and the filling equipment.
If the bag uses a filling spout and is suspended during filling, loop height may influence the position of the filling spout relative to the filling head.
Evaluate:
Bag suspension height.
Loop height.
Filling-spout position.
Filling-head position.
Operator access.
Equipment clearance.
This is why bag features cannot be specified in isolation.
A duffle top provides broad filling access.
Make sure operators can still comfortably:
Attach the loops.
Open the duffle.
Fill the bag.
Close the duffle.
Remove the filled FIBC.
The loop system shouldn’t make the top harder to use.
How does the product leave the bag?
Possible constructions may include:
Discharge spout.
Flat bottom.
Other controlled designs.
If the FIBC is suspended during discharge, the corner loops become part of the discharge process too.
This is a common place to get burned.
The FIBC fits the filling station.
It fits the warehouse.
Then somebody tries to suspend it above the receiving equipment.
Now there’s not enough vertical clearance.
Consider:
Loop height.
Body height.
Discharge construction.
Receiving equipment.
Suspension equipment.
Operator access.
Design for the whole process.
If the application needs a liner, define it.
A liner may address requirements involving:
Moisture.
Fine-particle containment.
Product contact.
Contamination concerns.
Other barrier needs.
Corner loops don’t determine whether a liner is required.
Fine-powder applications may require additional attention to stitched areas.
If sift-resistant seam construction is required, specify it independently.
Corner loops solve a lifting problem.
Sift-resistant seams address a containment problem.
Baffles can help control loaded shape in appropriate applications.
That may improve:
Loaded geometry.
Pallet utilization.
Warehouse utilization.
Trailer utilization.
Baffles do not replace corner loops.
Corner loops do not replace baffles.
If the application needs both, specify both.
If your application requires a particular electrostatic FIBC classification, state it.
Type A.
Type B.
Type C.
Type D.
The fact that a bag has four corner loops does not tell you its electrostatic classification.
Type C FIBCs use conductive construction and require proper grounding during filling and discharge.
If the FIBC also uses corner loops, the loop configuration should be part of the approved complete Type C construction.
Do not treat the loops as a substitute for grounding.
Type D FIBCs use static-dissipative construction without requiring grounding of the FIBC itself.
If corner loops are part of that design, they should be incorporated into the complete approved construction.
Avoid casually modifying specialized electrostatic FIBCs.
Corner loops do not make an FIBC food grade.
If the product has food-related requirements, separately address relevant items such as:
Product-contact materials.
Manufacturing controls.
Contamination controls.
Liner.
Traceability.
Documentation.
Customer requirements.
The loop specification and food-related specification have different jobs.
Now we get practical.
If a forklift handles the FIBC, understand the actual equipment.
Evaluate:
Tine width.
Tine spacing.
Tine length.
Loop opening.
Loop height.
Bag footprint.
Operator visibility.
Maneuvering space.
Don’t design the FIBC around a generic imaginary forklift.
Seriously.
Measure them.
This is one of the easiest things purchasing or operations can do before finalizing a high-volume FIBC.
You don’t want to discover a geometry problem after the order arrives.
How are the tines normally positioned?
Do operators have to adjust them before handling the FIBC?
Can the four loops be engaged efficiently?
A design that requires constant adjustment may add unnecessary time.
Can the forklift operator see the lifting points?
Does the bag body obscure them?
Does the pallet affect approach?
Can the operator engage the loops without somebody standing nearby and manually repositioning them?
These questions matter.
If the FIBC is suspended during filling, understand the filling frame.
Evaluate:
Support-point spacing.
Support-point position.
Available height.
Hook or support dimensions.
Filling-head position.
Bag-body position.
Loop dimensions.
Your purchase order doesn’t need to become an engineering novel.
But the approved FIBC drawing needs to reflect the design that works.
If operators manually mount the loops on the filling station, watch the process.
How many steps does it take?
Do they walk around the bag?
Do they have to twist or reposition loops?
Is the loop easy to grab?
Small handling problems become large problems at volume.
Automation makes dimensional consistency more important.
A person can compensate for a small mismatch.
A machine may not.
If loop position or geometry interacts with automated equipment, control it carefully.
If the bag is suspended during discharge, understand that equipment too.
Check:
Support points.
Loop engagement.
Total height.
Discharge access.
Receiving equipment.
Operator access.
Don’t optimize filling while ignoring unloading.
This gets missed all the time.
You aren’t necessarily the person who empties the bag.
Your customer may have:
Different forklifts.
Different discharge stations.
Different ceiling height.
Different procedures.
If the customer’s operation matters, incorporate those requirements before finalizing the FIBC.
If the FIBC moves through multiple facilities nationwide, determine whether one standardized corner-loop design works throughout the supply chain.
That may include:
Production facility.
Warehouse.
3PL.
Distribution center.
Customer.
A controlled standard is valuable only when it actually fits the important operations.
If the FIBC is palletized, define or validate the intended pallet configuration.
Consider:
Loaded footprint.
Pallet dimensions.
Overhang.
Bag orientation.
Stability.
Forklift access.
Loop position.
The FIBC and pallet need to function as one logistics package.
Don’t approve the bag solely from an empty sample.
The product may cause the filled FIBC to:
Bulge.
Settle.
Expand.
Change height.
Shift.
Loaded geometry can affect handling.
Bag dimensions and product distribution influence the loaded center of gravity.
Corner loops don’t fix an unstable package.
Make sure the complete FIBC is appropriately sized for the product and target fill.
Call or Text us at 832.400.1394
If the FIBC needs printing, define it independently.
That may include:
Printed panels.
Artwork reference.
Artwork revision.
Colors.
Position.
Orientation.
Then make sure the loop attachment areas don’t interfere with important printed information.
If a document pouch is needed, define:
Quantity.
Location.
Orientation.
Size.
Other relevant requirements.
Coordinate the pouch with the loops so it remains appropriately accessible and visible.
If the operation applies variable labels, identify a practical location.
Don’t place them where:
Loops obscure them.
Operators constantly grab them.
Forklift handling damages them.
Other equipment blocks them.
Think about the loaded bag in use.
This is where everything comes together.
The approved drawing can define:
Body construction.
Loop configuration.
Loop dimensions.
Loop position.
Top.
Bottom.
Liner.
Baffles.
Printing.
Document pouch.
Other construction details.
Then your purchase order references that drawing.
Much cleaner.
Never underestimate revision control.
Suppose you change:
Loop height.
Loop position.
Bag footprint.
Body height.
Filling top.
Document pouch.
Now there are multiple versions of the bag.
A drawing revision tells purchasing and manufacturing which one is current.
If this is a recurring program, assign a controlled part number.
That part number should point back to the approved specification.
Now your buyer can reorder the exact construction without recreating it from scratch.
This is lazy specification control.
Maybe the last order was correct.
Maybe it wasn’t.
Maybe there were two versions.
Maybe the supplier changed something.
Instead reference:
Part number.
Drawing.
Drawing revision.
Artwork revision where applicable.
Now everybody is talking about the same bag.
If the corner-loop configuration is operationally important, state that substitutions require approval.
A supplier may propose another design.
That’s fine.
Review it.
Test it where appropriate.
Then approve or reject the change.
Don’t discover it at delivery.
If you’re changing a meaningful part of the design, a sample can be extremely useful.
Especially when changing:
Supplier.
Loop dimensions.
Loop construction.
Body footprint.
Body height.
Top.
Bottom.
Filling equipment.
Handling equipment.
A drawing tells you what the bag should be.
A sample tells you how it actually behaves.
Don’t approve it from the conference room.
Take it to production.
Check:
Loop attachment.
Support-point alignment.
Top access.
Filling-head alignment.
Bag suspension.
Operator movement.
Equipment clearance.
Does it work?
Use representative product and appropriate operating conditions.
Then observe:
Loaded shape.
Bag expansion.
Product settling.
Loop position.
Overall height.
Pallet fit.
Now you’re evaluating the real package.
Use the production equipment where practical.
Check:
Loop engagement.
Tine positioning.
Operator visibility.
Maneuverability.
Loaded-bag position.
Clearance.
Headroom.
Don’t test the bag with a forklift that never handles the production FIBCs.
Check:
Loaded footprint.
Overhang.
Stability.
Bag orientation.
Forklift access.
Loop accessibility.
A good FIBC specification should account for logistics after filling.
If the bag is suspended for discharge, take it through the process.
Check:
Loop engagement.
Suspension.
Headroom.
Discharge access.
Operator access.
Receiving equipment.
Product flow.
The entire lifecycle matters.
Your operators are going to interact with these bags far more than the buyer who signs the PO.
Ask them:
Are the loops easy to mount?
Easy to engage?
Does the bag hang correctly?
Do you have to reposition anything?
Does it slow you down?
Would you change anything?
That feedback is extremely useful before a large production order.
A complete specification may identify:
FIBC Part Number: Controlled internal identifier.
Product: Material being packaged.
Bulk Density: Relevant product bulk density.
Target Fill Weight: Intended filled weight.
Safe Working Load: Required SWL.
Intended Use: Appropriate intended-use classification where relevant.
Body Construction: Approved FIBC construction.
Fabric: Approved fabric specification.
Coating: Coated or uncoated as required.
Top: Approved filling construction.
Bottom: Approved discharge construction.
Liner: Required liner where applicable.
Seams: Required seam construction.
Lifting Configuration: Four corner loops.
Loop Dimensions: Per approved drawing.
Loop Position: Per approved drawing.
Loop Orientation: Per approved drawing.
Baffles: Where applicable.
Electrostatic Type: Where applicable.
Food-Related Requirements: Where applicable.
Printing: Per approved artwork.
Document Pouch: Where applicable.
Labels: Where applicable.
Drawing: Approved FIBC drawing.
Drawing Revision: Current approved revision.
That’s a much stronger purchasing specification than:
“Bulk bag, four loops.”
Your exact specification should match your approved construction, but the lifting portion might read:
LIFTING CONFIGURATION: FOUR CORNER LOOPS
Loop Configuration: Four corner lifting loops per approved FIBC drawing.
Loop Dimensions: Per approved drawing.
Loop Opening: Per approved drawing where controlled.
Loop Position and Orientation: Per approved drawing.
Safe Working Load: Per approved FIBC specification.
Body Construction: Per approved drawing.
Top Construction: Per approved drawing.
Bottom Construction: Per approved drawing.
Liner: Per approved specification where applicable.
Printing: Per approved artwork where applicable.
Drawing Revision: Current approved revision referenced on purchase order.
Substitutions: No change to lifting-loop configuration without approval.
Now there is much less room for interpretation.
Before comparing prices, normalize the construction.
| Requirement | Supplier A | Supplier B |
|---|---|---|
| 📦 Same body construction | ✓ | ✓ |
| 🏋️ Same SWL | ✓ | ✓ |
| 🔁 Same corner-loop configuration | ✓ | ✓ |
| 📐 Same loop dimensions | ✓ | ✓ |
| 📍 Same loop position | ✓ | ✓ |
| ⬆️ Same top | ✓ | ✓ |
| ⬇️ Same bottom | ✓ | ✓ |
| 🧴 Same liner | ✓ | ✓ |
| 🧵 Same seams | ✓ | ✓ |
| 🧱 Same baffle requirement | ✓ | ✓ |
| ⚡ Same electrostatic type | ✓ | ✓ |
| 🍽️ Same food-related requirements | ✓ | ✓ |
| 🖨️ Same printing | ✓ | ✓ |
| 📋 Same documentation | ✓ | ✓ |
| 🚚 Same delivery basis | ✓ | ✓ |
Only after those items are aligned does the unit-price comparison become useful.
Avoid:
Writing only “4 loops.”
Writing only “corner loops.”
Not controlling loop height.
Not considering usable loop opening.
Ignoring loop position.
Ignoring loop orientation.
Ignoring the forklift.
Ignoring filling equipment.
Ignoring discharge equipment.
Ignoring customer equipment.
Ignoring headroom.
Changing bag dimensions without reevaluating the loops.
Guessing SWL from loop appearance.
Ignoring bulk density.
Ignoring target fill weight.
Ignoring palletization.
Ignoring loaded shape.
Ignoring the top and bottom.
Ignoring liner requirements.
Ignoring electrostatic classification.
Ignoring food-related requirements.
Failing to reference an approved drawing.
Failing to control drawing revisions.
Allowing silent substitutions.
Ordering “same as last time.”
Skipping operational testing after meaningful design changes.
Every one of those is preventable.
Before releasing the purchase order, verify four categories.
Product: Product type, bulk density, target fill weight, flow characteristics, and relevant product requirements.
FIBC: Safe working load, intended use, body construction, fabric, coating, top, bottom, liner, seams, baffles where applicable, electrostatic classification, food-related requirements where applicable, printing, document pouch, and documentation.
Corner Loops: Four-loop configuration, relevant loop dimensions, usable opening, position, orientation, filling-equipment compatibility, forklift compatibility, discharge-equipment compatibility, customer compatibility where necessary, and available headroom.
Document Control: FIBC part number, approved drawing, drawing revision, artwork revision where applicable, approved sample where appropriate, and substitution requirements.
If those four categories are controlled, you’ve eliminated a massive amount of ambiguity.
Don’t order:
“FIBC with four corner loops.”
Order a controlled packaging system.
Start with the product.
Define the bulk density.
Define the target fill weight.
Define the safe working load.
Define the body construction.
Define the fabric.
Define the top.
Define the bottom.
Define the liner where necessary.
Define containment requirements.
Define electrostatic requirements where applicable.
Then define the corner loops.
Correct configuration.
Correct height.
Correct usable opening.
Correct position.
Correct orientation.
Compatible with the filling frame.
Compatible with the forklift.
Compatible with the pallet.
Compatible with the discharge station.
Compatible with the customer’s process where necessary.
Put the approved construction on the FIBC drawing.
Assign a revision.
Reference it on the purchase order.
Test meaningful changes.
Get feedback from the people who actually handle the bag.
Then lock the design.
Because “four corner loops” tells a manufacturer the general feature you’re looking for.
A controlled FIBC specification tells them exactly what needs to show up at your plant.
Share This Post
