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1100 Tonne UHMWPE Round Sling

ก 1100 tonne UHMWPE round sling is rated 1,100,000 kg on a single vertical leg: a continuous loop of UHMWPE (ไดนีมา) yarn inside a double-layer heavy duty sleeve, ด้วย 7,700,000 kg minimum breaking load at 7:1 and a 2,200,000 kg proof load applied to every body before marking.

At 1,100 tonnes there are only two serious options: this sling, or a wire rope grommet. Both will lift the load — neither is the “safe” choice by default. What separates them is four things, and strength is not one of them.

Four Things Decide It, Not Strength

Where the Synthetic Wins

You can put it on the hook yourself

At 1,100 tonnes the sling is still a two-person item: no crane to position it, no rigging frame, no waiting for the hook to come back. In a yard where the same hook is doing the lift, that difference decides the shift.

It does not mark the load

Machined faces, coated plate, painted modules, stainless — a soft sleeve touches them without the scoring a steel grommet leaves. On finished surfaces that is often the deciding argument.

Nothing inside it can rot

A grommet’s worst failure mode is internal corrosion between the strands, invisible until it breaks. A synthetic body has no such mechanism; what you can see — the sleeve — is the wear layer, and it is meant to be inspected.

Where Steel Wins

• Heat. Hot work, radiant heat, slag, molten splash — the UHMWPE core has a temperature ceiling the steel does not.
• Stiffness. Precision levelling and matched-length sets are easier when the sling barely stretches. Under 1% against 1–2% is a real difference over a long body.
• An inspection procedure written for wire rope. If the client’s method statement counts broken wires, a synthetic sling does not fit the paperwork, however well it lifts.
• Local availability. Grommets are made in far more shops; more competition, shorter lead time, easier replacement.

The Test That Usually Settles It

Two checks decide most 1,100 t enquiries before price is discussed:

• What radius must it bend around? A grommet has a minimum D:d, and going under it costs capacity. A synthetic body will go around almost anything — the limit is sleeve wear, not strength.
• What is the temperature at the contact point? Not the ambient temperature of the hall — the surface of the load. ก 90 °C plate rules out UHMWPE long before any rating table does.

What the Proof Record Has to Show

Every 1100 tonne body is proof loaded to 2,200,000 kg — twice the vertical working load limit — in a bed rated above that figure, and the load applied is recorded against the sling’s serial number. What the record does not cover is the assembly: a four-leg set rated 2,310,000 kg is a lift plan, not a test. The plan carries the leg angles, the share between legs and the rating of the master link above them.

The Numbers You Are Buying

Four labels add up to 4,400,000 kg; the set is rated 2,310,000 kg. The gap is angle and unequal sharing, explained on the 700 tonne page.

Technical Specifications

When It Is the Wrong Sling

Three duties belong to another product, whatever the rating says:

• Hot loads — above the core’s temperature ceiling, use an aramid round sling or steel.
• A load left hanging — UHMWPE creeps under sustained tension; take the load off between lifts.
• Bare sharp edges — a sleeve is a wear layer, not armour; protect the edge or change the concept.