EN 1492-2 is the European standard that governs the design, manufacturing, testing, and labeling of polyester round slings, also known as endless round slings.
The standard ensures that every sling produced under its guidelines meets strict requirements for material strength, safety factor, and traceability, giving lifting professionals confidence in every rigging application. Slings compliant with EN 1492-2 are also frequently cross-certified to other regional standards such as ISO 4878 and Australian AS 4497, making them suitable for global export and use.
A 20T round sling consists of a continuous loop, or "endless," bundle of high-tenacity polyester (PES) yarn wound many times to achieve the rated strength, then encased in a protective tubular polyester sleeve.
This double-layer design — load-bearing core plus outer sleeve — protects the yarn from abrasion, UV exposure, dirt, and moisture while keeping the sling lightweight and easy to handle compared to chain or wire rope alternatives of equivalent capacity. The operating temperature range typically spans -40°C to +100°C.
Round slings offer distinct advantages over flat webbing slings or wire rope for many applications:
Round slings are measured by their Effective Working Length (EWL) — the distance from bearing point to bearing point when the sling is laid completely flat.
This measurement standard ensures consistency across manufacturers and makes it easy to select the correct sling length for a given rigging configuration, whether used in a straight, choker, or basket hitch.
A single 20T round sling delivers different working load limits depending on how it's rigged. Understanding these hitch-specific ratings is critical for safe load planning, since using the wrong configuration can significantly under- or overestimate real lifting capacity:
Every EN 1492-2 compliant sling must carry permanent labeling that includes the WLL, manufacturer identification, safety instructions, and conformity markings, along with a unique identification number for full traceability.
Regular inspection is mandatory to catch wear, cuts, chemical damage, or UV degradation before they compromise safety, and manufacturers are required to provide testing documentation to verify compliance. Buyers in regulated markets like the UK and EU should also confirm LOLER (Lifting Operations and Lifting Equipment Regulations) record compatibility when sourcing slings for commercial use.
| Specification | Detail |
|---|---|
| Working Load Limit (WLL) | 20,000 kg (20 tonnes), straight vertical lift |
| Safety Factor | 7:1 (minimum breaking strength = 7x WLL) |
| Color Code | Orange (standard color for slings above 12T under EN 1492-2 / AS 4497) |
| Material | 100% high-tenacity polyester (PES) yarn |
| Sleeve Type | Double-ply polyester sleeve |
| Length Range | Typically 1m–18m+ effective working length, customizable |
| Applicable Standards | EN 1492-2, ISO 4878, AS 4497 |
| Certification | CE Declaration of Conformity |
