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Reviewed and updated by ICD - Week 24/2026
Quick summary:
- Dunnage bags used in international logistics must meet strict standards covering both load capacity and material safety.
- The 4 most important: AAR (rail/transport load level), SGS/TUV (independent material and structure testing), MSDS (chemical safety), and ISO 9001 (production quality management).
- AAR Level 3+ is the mandatory passport for export to North America and for many insurers and carriers.
- SGS air-tightness testing requires a bag to hold at least 90-95% of its pressure after 72 hours.
AAR: the mandatory load-capacity standard
AAR (Association of American Railroads) sets the technical safety rules for cargo securement, and is the most important, mandatory standard for products bracing rail freight - especially in North America - and the benchmark for sea and multimodal transport. For the basics, see what a dunnage bag is.
AAR classifies bags into Levels 1-5 by their ability to withstand strong dynamic force, mainly the shunting force when rail cars couple. The shunting test is a strict simulated-impact test in which the bag must hold the load stable at a set collision speed. The higher the level, the greater the speed and load it withstands. An AAR Level 3 certificate means the bag passed rigorous field tests and absorbs the impulse needed to stop the load tipping or collapsing.
| AAR level | Working pressure | Key application |
|---|---|---|
| Level 1 | 0.2 bar / 2.9 PSI | Light-medium load, road transport, standard container |
| Level 2 | 0.4 bar / 6.0 PSI | Medium load, normal sea and rail, low surge |
| Level 3 | 0.55 bar / 8.0 PSI | Heavy, shift-prone goods; mandatory for North America export |
| Level 4 | 0.7 bar / 10.1 PSI | Very heavy, maximum stability (steel coils, machinery) |
SGS / TUV: independent material and structure testing
Where AAR focuses on in-use load capacity, SGS and TUV focus on material and structural quality. See our dedicated guide on the SGS standard. SGS verifies:
- Tensile strength: the maximum force the outer shell (kraft or woven PP) takes before tearing - key for woven PP.
- Air tightness: the inner PA/PE bladder must hold pressure, tested by inflating and checking pressure loss after 72 hours (minimum 90-95% of original).
- Impact resistance: tolerance to impact and local compression, simulating handling knocks.
- Material analysis: confirming virgin-plastic quality and uniform multi-ply kraft.
Germany’s TUV certificate is strong proof of manufacturing technique and product safety, covering load, structural safety and material checks.
MSDS and ISO 9001
MSDS (Material Safety Data Sheet) documents the chemical safety of the materials, confirming no hazardous heavy metals and safe handling - important for buyers with strict material-compliance rules. ISO 9001 certifies the maker’s quality-management system, giving confidence that every batch is produced consistently to specification, not just a single passing sample.
Frequently Asked Questions (FAQ)
Which standard matters most for export?
AAR. Level 3 or higher is the mandatory passport for North America and for many insurers and carriers to accept your cargo risk.
What does SGS air-tightness testing require?
The inflated bag must retain at least 90-95% of its original pressure after 72 hours.
What is the difference between AAR and SGS?
AAR rates in-use load capacity (impact/shunting); SGS independently tests material and structure (tensile, air-tightness, impact).
Why does ISO 9001 matter for a buyer?
It assures consistent production quality across every batch, not just one tested sample.
Contact ICD Viet Nam
For AAR- and SGS-certified dunnage bags, contact our team for documentation and a quote.
- Northern Vietnam: 0983 797 186 / 090 345 9186 / 090 5859 186
- Southern Vietnam: 098 6784 186
- Email: sales@icdvietnam.com.vn
- Zalo: Chat on Zalo
