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Contact: Wang Lili

E-mail：18066002268

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Address: Lifute Industrial Park, Taizhou City, Jiangsu Province

200 Tonne Round Sling

Lift Sling Rigging Co., Ltd manufacture 200 Tonne Round Sling,WLL 200T Polyester Round Slings,WLL 200 T Polyester Endless Round Sling,A two hundred tonne lift is defined by the crane, the headroom and the access before it is defined by the sling, so this article is bought to fit that envelope rather than to be the largest thing in it. This page sets out what the envelope contains, what the loop has to be in order to be dressed around a load at this figure, how the length convention decides the hook height, what the contact does to the load at two hundred tonnes, and the marking, envelope and inspection rules that apply. Made to order, batch tested with a certificate, HS code 630790, telephone 18066002268.

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Release time：2026-09-22 08:18

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Lift Sling Rigging Co., Ltd manufacture 200 Tonne Round Sling,WLL 200T Polyester Round Slings,WLL 200 T Polyester Endless Round Sling,200 Tonne Endless Round Sling.

200 Tonne Round Sling — The Article Fits the Lift Envelope

At two hundred tonnes the article is not the largest thing in the lift; the lift is. A 200 tonne lift is defined first by the crane, by the headroom under the hook and by whether a loop can be got round the load at all, and the sling is bought to fit that envelope. This page is about fitting it: what the envelope contains, why the length convention decides the height at which the load comes off the ground, what a two hundred tonne contact does to the load's surface, and the rules that still apply to the article itself. Made to order, batch tested with a certificate. HS code 630790; telephone 18066002268.

1. What the Article Is, and What It Is Not

This is an endless sleeved loop of high-tenacity polyester, rated at two hundred tonnes working load limit, made to order and supplied with a batch test certificate. The loop has no end to thread and no hardware in the load path, which is what the round form is chosen for. What the article is not is the finished rig: it is one component of a lift, and at this figure the other components decide its shape before the load does.

The article as supplied: an endless sleeved loop, coiled for transport. At this figure the loop is made to order, so its length is a decision taken with the lift rather than a size selected from a list. The photograph is this factory's own.

The article is	The article is not	Where the difference shows up
An endless loop with no join in the load path	A rigid member: it cannot hold the load away from anything	Where a spreader or a beam is needed, it has to come from elsewhere in the rig
A working load limit of two hundred tonnes in a stated configuration	A figure for whatever hitch the site happens to use	The label carries a rated capacity per type of hitch
A made-to-order article with a length and a circumference	A catalogue size that can be exchanged	The length convention has to be agreed before the cores are wound
One component of a lift	The lift itself: the crane, the headroom and the access are the rest of it	The envelope in section 2 is what the article has to fit

2. The Envelope Comes Before the Article

A two hundred tonne lift is uncommon enough that it is usually planned rather than improvised, and the plan starts from the crane. The reason is arithmetic: the crane's rated capacity falls as the radius grows, the hook block and the rigging are themselves part of the load, and the height the load can be raised to is limited by the headroom under the boom. By the time the sling is chosen, several decisions have already been made, and the article has to fit inside them.

The element of the envelope	Why it is decided before the sling	What it asks of the article
The crane's capacity at the working radius	The chart falls with radius, and the rigging is part of the load	That the article plus rigging plus load stays inside the chart, which is a question of mass as well as rating
The hook block and its own mass	At this size the block is heavy, and it occupies the space the loop has to sit in	A loop that can be dressed onto the block, and hardware matched to the block rather than to habit
The headroom under the boom	It limits how much of the height budget the sling may consume	A stated length, in the convention that matches the height calculation
The access to the load	Whether a loop can be got round the load is a question about the load and the space, not about the sling	A circumference that can be dressed, and a wrap radius the loop will accept
The ground and the standing area	Bearing pressure and standing decide whether the lift happens at all	Nothing directly, which is why the envelope is worth stating in full at the enquiry

3. Dressing the Loop: the Question That Rules Out Otherwise Valid Lifts

An endless loop cannot be opened, so using it means passing it round something. At two hundred tonnes the load is usually a single heavy item with no lifting points of its own, which is exactly why an endless loop is chosen: the sling becomes the lifting point. But the same property rules the lift out when there is no way to get the loop into position, and that is worth establishing before the article is ordered rather than on the day.

The way the loop is used	What it requires	What decides whether it works
Wrapped round the load and both sides taken to the hook	Enough access to pass the loop round, and a wrap radius the loop accepts	The load's shape and the space round it, not the sling's rating
Threaded through an opening in the load or in a fixture	An opening of usable size, and edges at that opening that will not act on the sleeve	The opening's radius and surface, and whether protection can travel with the article
Used as a choker round a section of the load	That the angle of choke is 120 degrees or more for the table figure to apply	The section's diameter and how tightly the loop draws
Used in a set with the load carried at two or four points	A set whose legs are matched and whose assembly is rated as a unit	The web sling bridle assembly page covers the assembly and its rating, so this page stays with the single article

4. The Length Convention Is a Height Decision

A loop has two lengths and they are not interchangeable. The circumference is measured round the article. The effective working length is what the article presents when it hangs in use, which is shorter, and it is the figure the height calculation needs. On a small sling the difference is a nuisance; at two hundred tonnes it is the difference between a load that clears an obstruction and one that does not, because the loads are large and the margins at the top of the lift are small.

There is a second length effect that is specific to polyester at this size, and it runs the opposite way from what buyers expect. Polyester stretches little under load, which is why it is the working fibre for large articles: the load does not sink a further hand's width into the slings while it is being raised. That predictability is what makes the height calculation worth doing at all. The full fibre envelope is on the WLL 150T polyester round sling page.

The figure	What it measures	Why it matters at this figure
Circumference	The distance round the loop as supplied	It decides whether the loop can be dressed round the load at all
Effective working length	What the loop presents when it hangs in use	It decides the hook height, and therefore whether the lift clears what it has to clear
Stretch under load	The small, predictable extension of polyester under tension	It is why the height calculation holds; it is not a cushion and not a margin
The rated capacity	The load the article may be subjected to, in a stated configuration	It belongs to a hitch and an angle, and is read from the label

5. What Two Hundred Tonnes Does to the Load

Two hundred tonnes on a narrow contact is a large pressure, and a synthetic sling is usually chosen at this size precisely because it does not damage what it lifts. What the article does at the contact is spread the load round the loop; what it cannot do is change the geometry of the load. Where the load presents an edge rather than a face, slings are to be padded or protected from the sharp edges of their loads, and a flexible sleeve is not a substitute for that protection. Where the load is soft enough to be marked by its own weight, the answer is more contact area rather than a larger rating.

The same article photographed to show the sleeve and the surface it presents at the contact. At this size the sleeve is both the contact surface and the wear part, which is why it is the first thing examined at every inspection and the reason the article is replaced rather than re-covered.

The load presents	What the article does	What has to be added
A broad face	The loop spreads the load across the contact and stays where it is dressed	Nothing, beyond checking that the loop cannot roll
A curved face or a cylindrical section	The loop conforms round the curve, spreading the load further	Attention to the wrap radius, which is an input behind the rated load
An edge	The sleeve meets the edge and the load concentrates there	Padding or protection: a sleeve is not edge protection
A soft or finished surface	The load is spread, but two hundred tonnes still marks what it touches	More contact area, or a spreader, rather than a higher rating

6. Marking, the Envelope and the Figure That Exists Only on the Label

At this figure the colour code has already stopped separating values: it gives one colour per capacity step and its last entry reads ten tonnes and above, so the sleeve colour marks a class of article rather than a number. Each sling is marked or coded to show the rated capacities for each type of hitch and the type of synthetic web material, and slings without affixed and legible identification are not to be used at all. On an article of this size that rule is the whole identification system, and a faded label retires a sound article.

The duty envelope then has to be checked against the site, because it is an exclusion rather than a margin. 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. Nylon is not to be used where acids or phenolics are present in fume, vapour, spray, mist or liquid form, 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 published figures are reconciled.

The element	What it carries	Why it matters at two hundred tonnes
The marking	The rated capacities for each type of hitch, and the type of synthetic material	It is the only place the figure exists: the colour stopped separating values above ten tonnes
The certificate	What was tested, to what figure, and which article it names	It answers the auditor's question about a made-to-order article
The traceability code	Which batch and which article the marking belongs to	It links the article on the hook to the certificate in the file
The envelope limits	Temperature and chemical exclusions for the fibre and the fittings	Where the lift is hot or the atmosphere is aggressive, the envelope decides and the rating does not

7. 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. At this size the removal decision is a capital decision as well as a safety one, so it is worth recording properly: acid or caustic burns, melting or charring, snags, punctures, tears or cuts, broken or worn stitching, and distortion of fittings each remove the article from service immediately.

Repairs belong to the manufacturer or an equivalent entity, a load-bearing splice is not repaired in any case, 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 rather than retired.

8. Ordering: the Envelope First, Then the Article

An order for this article is a specification, and the lines below are in the order in which the answers constrain each other: the lift envelope first, because it decides what the article has to be.

Line	What to state	What it fixes
1	The crane, the working radius, the hook block and the headroom available	The length and the mass budget the article has to fit inside
2	The load, its mass, and how it can be approached	Whether a loop can be dressed at all, and which way it is used
3	The wrap radius and the surface, edge or face the loop will meet	The diameter of curvature behind the rating, and whether protection travels with the article
4	The hitch: wrapped and both sides taken, threaded, or choked	Which column of the label the figure comes from
5	The length, and which convention is meant	The circumference for dressing, the working length for the height calculation
6	The environment: temperature, chemistry, inside or outside, and the documents the site must hold	The fibre, the fittings, the marking and what is kept in the file

9. Frequently Asked Questions

Q1: What is a 200 tonne round sling?

A sleeved endless loop of high-tenacity polyester with a working load limit of two hundred tonnes in a stated configuration, made to order and supplied with a batch test certificate. The figure belongs to a hitch and an angle, and the label carries a rated capacity for each type of hitch.

Q2: Is 200 tonnes the breaking strength?

No. It is the working load limit, and the article is built to withstand a multiple of it. The multiple is the factor, and it is held in reserve rather than available to be spent on a heavy day.

Q3: Why is the loop endless?

Because there is no join in the load path and no hardware in it, and because the article can be dressed round a load that has no lifting points of its own. The trade-off is that the loop cannot be opened, so access has to be established before the order.

Q4: How do I know the loop will go round my load?

From the circumference and the access, not from the rating. The circumference decides whether it can be dressed; the wrap radius decides whether the geometry is one the article was rated for, since the diameter of curvature is an input behind the rated load.

Q5: What is the difference between circumference and working length?

The circumference is measured round the article; the effective working length is what it presents when it hangs in use, and it is shorter. The height calculation needs the second figure.

Q6: Can the load be choked?

Yes, from the column for the choke, provided the angle of choke is 120 degrees or more. Below that the figure comes from the manufacturer rather than from a row of the table.

Q7: Does the sling stretch at this load?

Very little. Polyester is the working fibre at large sizes precisely because its extension is small and predictable, so the height at which the load comes off the ground can be calculated. That is not a cushion and not a substitute for a margin.

Q8: What does the colour of the sleeve tell me?

Nothing about the figure. The colour code ends at orange, which reads ten tonnes and above, so above ten tonnes it marks a class of article. The rated capacities printed on the label are what govern the lift.

Q9: 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.

Q10: Can it 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.

Contact

Send the envelope in section 8 and we will come back with the article that fits it, or send the lift as it stands and we will come back with the questions that are missing. Articles at this figure are made to order, batch tested, marked per hitch and supplied with a certificate.