| FIBC Construction | Confirm the bag type, filling and discharge design, lifting loops, liner, seams, and safe working load. | The stated safe working load should match the intended cargo and handling method, with a documented safety factor. | Technical drawing, product specification sheet, sample inspection, and load-test report. | Compare the specification with the actual loading weight, lifting equipment, stacking method, and transport conditions. |
| Moisture Protection | Evaluate whether moisture resistance comes from a coated woven fabric, an internal polyethylene liner, a laminated layer, or a combination of these features. | The moisture-control design should be selected according to the product’s sensitivity to humidity, condensation, and water exposure. | Material structure diagram, liner specification, coating details, and water-resistance test information. | Request a production sample and conduct a controlled visual, seam, liner, and packaging inspection before approval. |
| Fabric Material | Check the type and quality consistency of polypropylene fabric and any polyethylene liner used for moisture protection. | Material specifications should remain consistent with the approved sample and purchase contract. | Material declaration, incoming inspection records, sample comparison, and batch traceability documents. | Compare fabric weight, texture, coating uniformity, liner thickness, and dimensions across multiple samples. |
| Seam Integrity | Inspect stitching quality, seam allowance, thread selection, corner construction, and liner sealing. | Seams should be continuous, even, free from skipped stitches, and appropriate for the specified load and moisture barrier. | Seam inspection checklist, sewing standard, production photographs, and finished-product inspection records. | Inspect high-stress areas such as lifting loops, bottom discharge seams, top closure, and liner connections. |
| Safe Working Load | Verify the maximum working load for the complete FIBC design rather than relying only on fabric strength. | The declared safe working load should be supported by testing of the finished bag and should not be confused with breaking load. | Third-party or in-house test report, finished-bag load test, and product label information. | Match the test configuration to the buyer’s intended lifting, filling, discharge, and reuse conditions. |
| Safety Factor | Determine whether the manufacturer provides a documented safety factor appropriate to the FIBC’s design and use. | Common FIBC designs use a 5:1 or 6:1 safety factor, depending on the intended use and applicable requirements. | Design calculation, test report, technical declaration, and compliance documentation. | Confirm that the stated ratio applies to the complete finished bag and the specified reuse conditions. |
| Electrostatic Control | Identify whether the bag is Type A, B, C, or D when handling combustible powders or operating in potentially hazardous areas. | Type selection must correspond to the product, filling environment, grounding procedure, and applicable hazardous-area assessment. | Electrostatic classification, test report, grounding instructions, and handling procedure. | Have a qualified safety professional verify the selected FIBC type before use with combustible or flammable materials. |
| Dimensional Accuracy | Check finished length, width, height, inlet, outlet, liner fit, and lifting-loop position. | Dimensions and tolerances should be defined in the approved drawing and measured consistently during production. | Approved technical drawing, inspection report, measurement records, and pre-shipment sample. | Measure production samples and confirm compatibility with filling machines, pallets, racks, and containers. |
| Product Cleanliness | Assess dust, oil, foreign fibers, odor, moisture, and contamination risks for the intended cargo. | Cleanliness requirements should be stated according to the cargo, such as food, pharmaceutical, chemical, or industrial use. | Cleaning procedure, hygiene statement, inspection record, and packaging specification. | Define an acceptable cleanliness level and inspect both the internal liner and external fabric before shipment. |
| Quality Management | Review whether the manufacturing site operates documented procedures for purchasing, production, inspection, corrective action, and traceability. | A consistent quality system should link raw-material batches, production records, inspection results, and shipment lots. | Quality manual, process-control plan, internal audit records, and corrective-action reports. | Use a supplier questionnaire and verify records during a remote or on-site audit. |
| Testing Capability | Determine whether the manufacturer can test fabric, seams, dimensions, load performance, and moisture-related features. | Testing should cover the finished FIBC and use documented methods with calibrated equipment. | Equipment list, calibration certificates, test procedures, and representative test reports. | Ask for recent test records from the same or an equivalent construction, not only generic laboratory documents. |
| Standards and Compliance | Identify the standards and legal requirements applicable to the destination market and cargo. | Compliance claims should specify the exact standard, product scope, test date, and issuing organization. | Declaration of conformity, relevant certificates, test reports, and regulatory statements. | Check certificate validity, scope, manufacturer details, and whether the document covers the ordered specification. |
| Moisture-Control Packaging | Review how empty bags are folded, wrapped, sealed, stored, and protected before export. | Packaging should prevent rain, condensation, dust, and prolonged warehouse humidity from reaching the FIBCs. | Packaging specification, photographs, warehouse procedure, and container-loading plan. | Confirm the use of sealed outer packaging and dry, covered storage during manufacturing and transportation. |
| Production Capacity | Assess whether the facility can meet the required monthly quantity without reducing inspection or material consistency. | Capacity should be demonstrated for the same construction, dimensions, liner type, and quality requirements. | Capacity statement, production schedule, machinery list, and recent delivery records. | Compare forecast demand with actual production lead time and establish a realistic shipment schedule. |
| Lead Time Control | Evaluate raw-material availability, sample approval timing, production planning, and export-document preparation. | The supplier should provide milestone dates from technical confirmation through inspection and shipment. | Order timeline, production plan, inspection booking record, and shipping-document checklist. | Use contractual milestones and require prompt notification of material, production, or shipment delays. |
| Traceability | Confirm that finished bags can be linked to production dates, material batches, inspection results, and shipment lots. | Lot identification should remain legible on packaging and in the manufacturer’s records. | Lot-code system, batch records, packing list, inspection report, and retention-sample procedure. | Request a sample traceability record and verify that the system can support complaint investigation. |
| Pre-Shipment Inspection | Establish how many bags are inspected and which characteristics are checked before loading. | Inspection criteria should cover dimensions, appearance, seams, accessories, liner condition, packaging, and quantity. | Inspection checklist, sampling plan, inspection photographs, and final inspection report. | Use an agreed acceptance standard and, for critical orders, arrange independent inspection before shipment. |
| Customization Capability | Check the ability to customize dimensions, inlet and outlet styles, liners, coatings, labels, printing, and pallet configuration. | Custom features should be documented in a controlled drawing and approved sample before mass production. | Technical drawings, sample-development records, change-control documents, and approval sign-off. | Freeze the specification after approval and require written authorization for later changes. |
| Total Cost of Ownership | Consider unit price together with liner performance, failure risk, packaging, inspection, freight, and disposal or reuse requirements. | The lowest quotation is not necessarily the lowest-cost option if moisture damage or handling failures create downstream losses. | Itemized quotation, packing details, freight assumptions, warranty terms, and quality-cost records. | Compare suppliers using the same specification, delivery terms, inspection level, and expected service life. |
| Communication and After-Sales Support | Evaluate response speed, technical understanding, complaint handling, replacement policy, and corrective-action capability. | A reliable supplier should provide a named contact, written corrective actions, and documented resolution timelines. | Communication records, complaint procedure, warranty terms, and corrective-action examples. | Test the supplier with a detailed pre-order questionnaire and assess the quality of technical responses. |
