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Contact: Wang Lili

E-mail：18066002268

Phone：702461526@qq.com

Address: Lifute Industrial Park, Taizhou City, Jiangsu Province

Circular circular lifting belt, circular flexible lifting belt, circular flexible cylindrical lifting belt

Lifute Hoisting Co., Ltd. 18066002268 produces lifting belts, lifting nets, nylon ropes, soft ladders, steel wire rope rigging, paper ropes, safety belts, safety nets, lifting chains, steel coil hoists, crossbeam hoists, flat lifting belts, circular lifting belts, electric traction ropes, high-altitude safety belts, and anti fall safety nets

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Release time：2026-09-23 09:04

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Lift Sling Rigging Co., Ltd manufacture Circular circular lifting belt, circular flexible lifting belt, circular flexible cylindrical lifting belt.

Circular circular lifting belt — Flexibility Is Not Stretch, and Conformity Is Not Protection

The name of this article repeats one word and adds another: circular, and flexible. The first describes the form, a ring with no end to thread and no side to keep upward. The second describes the property that makes the form useful, that the ring conforms to whatever it is wrapped round, so the load is met by a surface rather than by a pair of high points. This page is about the second word, because it is the one that decides where the article may be used and where it may not: what flexibility buys, what it does not buy, and the diameter of curvature that governs how small a radius it may be loaded over. HS code 630790; telephone 18066002268.

1. What the Two Words Describe

A circular lifting belt is a ring: one continuous band with no end to thread and no side that has to stay upward, which is why the form is often chosen for work where the load has to be wrapped rather than hooked. The word flexible adds the second half of the idea, and it is the half that decides what the ring can be used on. A ring that bends to the load meets it with a surface; a ring that will not bend meets it at the two points where it touches.

The article as supplied: a woven ring with no free end, which is what lets it be wrapped rather than hooked. The photograph is this factory's own, and it is placed against the first section on purpose: the form is the half of the name that can be checked by looking, and the flexibility is the half that has to be matched to the load.

It is worth separating the two words before the rest of this page, because they are not the same claim and they fail in different ways. Circular is a description of shape: it can be checked by looking at the article. Flexible is a description of behaviour under load and in handling: it has to be matched to the load, and the match is governed by published rules rather than by how soft the article feels in the hand.

The word	What it describes	What has to be checked before the lift
Circular	The form: a closed ring, with no free end and no inverted side	That the ring will go round the load at all, and that it will not be forced into a shape it was not rated for
Flexible	The behaviour: the ring conforms to the load and returns	How small a radius it will be loaded over, and whether the load's surface presents an edge rather than a curve
Lifting belt	The construction: a woven synthetic band, loaded in tension	The rated capacity for the hitch used, and the marking that carries it

2. Flexibility Is Not Stretch

The commonest misreading of this article is to treat flexible as a statement about how much it gives under load, and then to buy it as though it would cushion a lift. The two properties are separate. Conformity is the ring bending to the shape of the load: it happens at the moment of dressing the article on, and it changes where the load touches. Elongation is the fibre stretching under tension: it happens during the lift, and it changes how far the load settles. A flexible ring is not a stretchy one, and a sling with predictable stretch is not necessarily a conforming one.

The property	When it acts	What it changes	What decides it
Flexibility, or conformity	While the article is dressed onto the load	Where the load touches the article, and therefore how the load is spread	The construction of the band, and the diameter of curvature it is loaded over
Elongation, or stretch	While the load is being lifted	How far the load settles as it comes off the ground, and therefore the hook height	The fibre: polyester stretches little and recovers, which is why it is the working fibre at large sizes
Safety margin	Only when something goes wrong	Nothing, until the margin is exceeded: it is held in reserve rather than used	The factor the article is built to, which belongs in the order rather than in the catalogue

3. What the Ring Conforms To, and Where Conforming Stops

A ring conforms until it cannot, and the point at which it cannot is a published input to the article's own rating. Rated loads are calculated from material strength, design factor, type of hitch, angle of loading, diameter of curvature over which the sling is used, and fabrication efficiency. The curvature is not a detail of the load: it is one of the six things the figure is built from, which is why a ring that wraps a tight radius is not the same lift as the same ring hanging straight.

Two consequences follow for a flexible article, and both are practical. The first is that flexibility does not excuse a small radius: where the load presents a diameter small in relation to the article's width and thickness, the contact concentrates, and the question belongs to the manufacturer rather than to the table. The second is that the anti-constriction rules still apply: slings are not to be constricted, bunched or pinched by the load, the hook or any fitting. A flexible ring is more likely to be dressed into a shape that bunches, not less, because it will follow whatever the load offers.

The radius the ring is loaded over	What happens	What to do
Large, generous radius	The ring conforms and the load is spread along the contact	The rated capacity for the hitch applies as tabulated
Small radius against a soft or broad surface	Contact concentrates where the ring bends most	Reduce the load, spread it with a pad or a spreader, or ask the manufacturer
Small radius against an edge	Contact concentrates and the edge acts on the band	Pad or protect the edge: a flexible article is not edge protection
A radius that forces the ring to bunch	The band folds or piles against itself, so the load is no longer shared equally	Re-dress the article, or change the article: bunched or pinched loading is prohibited

4. Where Flexibility Decides the Lift

The ring form earns its place where the load cannot be hooked, or where the same article has to be used in several shapes over a working day. That is a genuine advantage, and it is also the reason this article is not interchangeable with its neighbours. A flat band holds a wide face well and a curved face badly; a round sling carries one join-free load path and is chosen where the path matters more than the shape; a chain or a rigid member is chosen where rigidity itself is the requirement.

The lift	This article	The neighbour, and why it is different
The load has to be wrapped, and the wrap radius changes between lifts	Suits: a conforming ring meets each shape without being re-rigged	A flat band (anchor ring flat lifting strap) holds a face and resists a changing wrap
One join-free load path is the priority	The ring is a band, and the ring form has a construction of its own	heavy duty round sling for the continuous core in a sleeve
Two loaded ends with hardware at each	Not this article: a ring has no ends to hang from	circular eye shaped lifting belt for the eye-ended form
The load presents a contact point rather than a face	The ring helps the wrap but the edge rules are unchanged	circular lifting straps for the contact and the sleeve
The load is hot, or the atmosphere is chemically hostile	Not a question of flexibility: the duty envelope decides	WLL 150T polyester round sling for the envelope in full

5. What Flexibility Does Not Do

Four things are regularly assumed of a soft, conforming article, and none of them is included in the purchase. Stating them plainly is cheaper than discovering them on a lift.

The assumption	The position	The consequence if it is relied on
A flexible belt protects an edge	Slings are to be padded or protected from the sharp edges of their loads	An edge cuts a soft article as readily as a stiff one, and more quietly
A flexible belt absorbs shock	Shock loading is prohibited, and the prohibition does not depend on the article	A snatch lift is a load the article was never rated for, whatever its flexibility
A flexible belt tolerates a bad angle	Rated capacity belongs to a hitch and an angle	The angle arithmetic is unchanged by conformity: the 30 ton flexible lifting belt page works it through
A flexible belt can be forced into shape	Constricted, bunched or pinched loading is prohibited	A ring dressed into a fold loads unevenly and retires early

6. What Still Applies to a Ring

The rules that govern a ring are the ordinary rules for a synthetic sling, and the ring form does not remove any of them. A ring is loaded in tension like any other sling, its rated capacity belongs to the hitch used, and it has to be inspected before use like any other article. Two of the rules are worth naming here because they are the ones a ring is most often used outside of.

The rule, as published	What it means for a ring	Where the ring is used outside it most often
Slings are not to be constricted, bunched or pinched by the load, hook or any fitting	The ring is dressed to lie flat against the load, not gathered into a fold	Wrapping a small load with a large ring, where the excess has to go somewhere
A choker is rated from the table provided the angle of choke is 120 degrees or more	A ring used as a choker is read from the choker column, not from the vertical column	Treating a ring choker as though it were a straight pull because the ring looks the same either way
Slings are to be padded or protected from sharp edges	The ring passes the edge as it wraps, so the protection has to travel with the article	Reliance on the ring's own softness instead of a pad
Fittings: minimum breaking strength equal to that of the sling, free of sharp edges, and able to sustain twice the rated load without visible permanent deformation	Where shackles or hooks are used with the ring, they are matched to it and to the radius	Hardware chosen for the hook rather than for the article

7. Marking, Identification and the Length Convention

Each sling is marked or coded to show the rated capacities for each type of hitch and the type of synthetic web material, and the article's own marking is the figure that governs its use. Slings without affixed and legible identification are not to be used at all, which is why a faded label retires an article that may be perfectly sound. For a ring there is one further identification question that a flat sling does not raise: a ring is measured as a circumference, so an order that states a length has to say whether it means the circumference of the ring or the working length it presents when folded over a load.

The element	What it has to carry	Why it matters on a ring
The marking	The rated capacities for each type of hitch, and the type of synthetic material	Without legible marking the article is not usable, whatever its condition
The colour	The capacity step, up to the last entry, which reads ten tonnes and above	Above ten tonnes the colour marks a class rather than a value, so the label carries the figure
The length convention	Circumference of the ring, or the working length as used	A ring has no ends, so length has to be agreed rather than assumed
The certificate	What was tested, to what figure, and which article it names	It answers the auditor's question about an article that is made to order

8. The Duty Envelope Decides More Than Flexibility Does

Where an article is chosen for a hot or chemically aggressive duty, flexibility is irrelevant and the envelope decides. Polyester and polyamide have a published range of minus 40 to plus 100 degrees C, the guidance for synthetic slings works to 90 degrees C as the upper figure for those materials, and the regulation sets polyester and nylon at 180 degrees F with polypropylene at 200 degrees F. Work to the lowest published figure for the material. Chemistry is an exclusion rather than a margin: nylon is not to be used where fumes, vapours, sprays, mists or liquids of acids or phenolics are present, polyester and polypropylene are not to be used where the same forms of caustics are present, and aluminium fittings are not to be used where caustics are present. The WLL 150T polyester round sling page carries the envelope in full, including how the different published figures are reconciled.

9. Between Inspections: Removal, Repair and the Record

The article is inspected each day before use, and periodic inspections are made at intervals no greater than twelve months, with additional inspections where service conditions warrant them, judged on the frequency of use, the severity of the service, the nature of the lifts and the experience of the service life. Any one of the published findings removes the article from service immediately: acid or caustic burns, melting or charring, snags, punctures, tears or cuts, broken or worn stitching, and distortion of fittings.

Repairs are the manufacturer's work rather than the site's. A load-bearing splice is not repaired and temporary repairs are prohibited; the article returns to service only after a proof test to twice its rated capacity, with the certificate retained and available for examination and the repair marked to identify who made it. The heavy duty round sling class page sets out where that leaves this family against the chain family, where the same article can be repaired and re-tested instead of retired.

10. Ordering a Circular Flexible Lifting Belt

Line	What to state	What it fixes
1	The load, and the shape it presents: a face, a curve, or a point	Whether a conforming ring is the right answer at all
2	The radius the ring will wrap, at its tightest	The diameter of curvature, which is one of the inputs behind the rated load
3	The hitch: wrapped, choked, or used as a sling in its own right	Which column of the label the figure comes from
4	The length, and which convention is meant	The circumference of the ring, or the working length as used
5	The environment: temperature, chemistry, and whether the load presents an edge	The fibre, the fittings, and whether protection travels with the article
6	The marking and the documents the site has to hold	What the label says, and what is kept in the file afterwards

11. Frequently Asked Questions

Q1: Is a circular flexible lifting belt the same as a round sling?

No. This article is a ring of woven band; a round sling is a continuous core inside a sleeve, which is a different construction and is chosen where one join-free load path matters more than conformity.

Q2: Does flexible mean stretchy?

No, and the difference is worth keeping. Flexibility is the ring conforming to the load as it is dressed on; elongation is the fibre stretching during the lift. A flexible article is not automatically a cushioning one.

Q3: How small a radius can it wrap?

The diameter of curvature the sling is loaded over is one of the inputs behind its rated load, so a tight radius is a change to the configuration rather than a detail. Where the radius is small in relation to the band, ask the manufacturer for the figure.

Q4: Can it be used as a choker?

Yes, from the column for the choke, and the choker figure is valid provided the angle of choke is 120 degrees or more. Below that the figure comes from the manufacturer.

Q5: Is it edge protection?

No. Slings are to be padded or protected from the sharp edges of their loads. A conforming ring spreads the load round a curve, but an edge still acts on the band.

Q6: What if the ring is too large for the load?

The excess has to go somewhere, and gathering it into a fold is constricted or bunched loading, which is prohibited. Where the excess cannot be dressed away, the article is the wrong one for that lift.

Q7: How often must it be inspected?

Each day before use, with periodic inspections at intervals no greater than twelve months and additional inspections where service conditions warrant, judged on the frequency of use, the severity of the service, the nature of the lifts and the experience of the service life.

Q8: The label is illegible. Can it be used?

No. Slings without affixed and legible identification are not to be used at all: the marking is the figure that governs the lift.

Q9: Can a damaged ring be repaired?

A load-bearing splice is not repaired and temporary repairs are prohibited. Repairs are made by the manufacturer or an equivalent entity, and the article returns to service only after a proof test to twice its rated capacity with the certificate retained.

Q10: What temperature can it work at?

For polyester and polyamide, minus 40 to plus 100 degrees C as published, 90 degrees C as the upper figure in the guidance for synthetic slings, and 180 degrees F in the regulation. Work to the lowest published figure and keep the source with it.

Contact

Send the six lines in section 10, or send the lift as it stands and we will come back with the questions that are missing. Articles in this family are batch tested, marked per hitch and supplied with a certificate.