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Contact: Wang Lili

E-mail：18066002268

Phone：702461526@qq.com

Address: Lifute Industrial Park, Taizhou City, Jiangsu Province

Splicing, threading, wrapping sling, splicing, threading, wrapping, 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 09:10

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Lift Sling Rigging Co., Ltd manufacture Splicing, threading, wrapping sling, splicing, threading, wrapping, lifting belt,Splicing, threading and wrapping are three ways of making a lifting belt fit a load.

Splicing, threading, wrapping sling — The Three Operations in the Name, and What Each One Costs

The name of this article is a list of three operations, and that is the honest description of what it is: a belt that is made up to a load by splicing, by threading or by wrapping, according to what the load will accept. Each of the three is a fabrication decision rather than a feature of the finished article, and each one has a cost: a splice introduces a seam into a load path that would otherwise be continuous, threading has to be possible at all, and wrapping concentrates the load where it crosses itself. This page takes the three operations one at a time, then sets out what a made-up article wants in the order and where a standard sling is the better answer. HS code 630790; telephone 18066002268.

1. Three Operations, and What Each One Is For

A made-up lifting belt exists because the load does not suit a catalogue sling. That is the whole justification for the article, and it is also the reason the three words in its name matter more than the tonnage: the operations decide the shape the article has to be, and the shape is what has to be agreed before anything else.

The operation	What it does	Chosen when	What it costs
Splicing	Joins webbing, closes a loop, or forms a fixed end	The article has to be a length or a shape that a standard sling does not come in	A seam appears in the load path: it is the part that has to be made to the full strength of the belt
Threading	Passes the belt through an eye, a loop or an opening	The load or the rig presents something to thread through rather than a surface to wrap	The hitch changes, and with it the column of the label; the opening's edge and radius become the constraint
Wrapping	Winds the belt round a section of the load	The load is a pipe, a coil, a drum or a section that cannot be hooked	The load concentrates where the belt crosses itself or where the wraps meet, and the number of wraps matters

The three are often combined, and the combination is worth stating in the order rather than leaving to be interpreted: a wrapped and threaded article is a different object from a wrapped one, and at the sizes these articles are built in, that difference is settled in a drawing rather than in a catalogue number.

2. A Made-Up Article Is Measured, Not Selected

A made-up lifting belt, spliced and finished to suit the load it was ordered for. This is the factory's own photograph of the article, and it is placed here because the article cannot be shown as a range: what it looks like is the answer to a measurement, not a product family with sizes in it.

The article in the photograph is not a size that could be picked from a list. It is the result of three measurements and a decision: the distance the belt has to span, the shape it has to go round or through, and the surface it will meet. That is why this page spends its length on the operations rather than on a capacity table, and why an enquiry for a made-up article has to carry the load with it.

To be measured	Why the figure is needed	What it decides
The span, and the shape the belt must take between the two ends	The article is cut and made to that shape rather than adjusted on site	The length of the belt and where the splices fall
The aperture, section or edge the belt passes through or round	Threading and wrapping are decided by what is physically available	The hitch, and therefore which column of the label the figure comes from
The surface, its radius, and whether there is an edge	Contact and protection are decided by the surface, not by the rating	Whether protection travels with the article, and how the contact is arranged
The environment: temperature, chemistry, wet or dry	The fibre and the fittings have their own limits	The material of the belt, and of anything used with it

3. Splicing: a Seam Is Made to the Strength of the Belt

Splicing is the operation that turns a length of webbing into a rated article, and the regulations are unusually specific about it, because a seam is the one place where a made-up sling can be weaker than the material it is made from. Stitching is the only method permitted for attaching end fittings to webbing and for forming eyes; the thread has to be in an even pattern and carry enough stitches to develop the full breaking strength of the sling; and the fabrication efficiency of the made-up article is one of the six inputs behind its rated load, alongside material strength, design factor, type of hitch, angle of loading and the diameter of curvature the sling is used over.

Two consequences follow for a spliced article, and both are worth knowing before the order rather than after a failure. The first is that a splice is not a field repair: load-bearing splices are not repaired, temporary repairs are prohibited, and damage at a seam retires the article rather than being stitched up on site. The second is that the seam has to be inspected like the rest of the article, which is why the removal criteria name broken or worn stitching explicitly.

The requirement, as published	What it means for a spliced article	What it prevents
Stitching is the only method permitted to attach end fittings and to form eyes	A splice is made by stitching to a pattern, not by knotting, clamping or tying the webbing to itself	A joint that looks sound and has no engineering behind it
The thread in an even pattern, with enough stitches to develop the full breaking strength of the sling	The seam, not the webbing, is the part of the article that is most easily under-built	A 'heavy duty' belt with a light seam, which fails exactly where it is least visible
Fabrication efficiency is one of the six inputs behind a rated load	Two articles made from the same webbing are not the same article if they are made up differently	Buying on webbing specification alone, which is the commonest way to buy a made-up sling badly
Load-bearing splices are not repaired; temporary repairs are prohibited	A worn seam means the article leaves service, and returns only after the manufacturer's repair and a proof test	Field stitching, which cannot be checked and can quietly reduce the rating

4. Threading: the Operation That Has to Be Possible

Threading is a statement about the load: something has to be passed through something else. Where the article is threaded through an eye of its own, the rule on eye width applies - an object placed in the eye of a sling is not to be wider than one-third of the length of the eye - and where it is threaded through the load or a fixture, the opening's radius and surface become the constraint instead. Threading also changes the hitch, and a change of hitch is a change of rated capacity: the figure belongs to a column, not to the article.

What the belt is threaded through	The constraint it creates	What has to be stated in the order
Its own eye	The one-third rule on the width of whatever sits in the eye	The fitting or the object that will sit in the eye, and its width
An opening in the load or in a fixture	The radius and the surface of that opening, and the edge at each end	The aperture's size, shape, surface and radius
A ring, a link or a master link	The radius the belt is loaded over, and the seat it takes	The hardware, and the assembly ratings if the rig is more than one article
More than one pass, to spread the load	How the passes lie against each other, and whether they bunch	The intended number of passes, drawn rather than described

5. Wrapping: Where the Load Concentrates

Wrapping is the operation for loads with no lifting points at all: a pipe, a coil, a drum or a section that has to be cradled rather than hooked. It works, and it concentrates the load in two places that a straight pull does not have: where the belt crosses itself, and where the wraps meet the load's surface. Both are geometry, and both can be improved by the way the article is made up rather than by buying more rating.

The wrapped form has its own neighbours in this catalogue, and the double buckle core wrapped sling page covers the version with buckles and a core, so this page keeps to the operation itself and what it asks of the article.

The wrapped arrangement	Where the load sits	What the article has to provide
A single wrap with both ends taken to the hook	At the two points where the belt leaves the load	A contact surface at each point, and protection if the surface presents an edge
Multiple wraps, taken together	Shared across the wraps, if they lie flat and do not cross each other	Enough belt to wrap, and a construction that lets the wraps lie against one another
A wrap used as a cradle under an item	Across the underside, spreading the load	A width and a construction suited to the item's underside, and a radius the belt accepts
A wrap joined into a closed loop on site	Nowhere: the loop is the article, and it is made as one	That the loop is spliced and rated as an article rather than assembled from parts on site

6. What the Order Has to Carry

Line	What to state	What it fixes
1	The load: mass, and the shape it presents	Which of the three operations is wanted, and whether more than one is
2	The span, drawn rather than described	Length, where the splices fall, and the shape the belt takes
3	The aperture, section or edge the belt meets, with its radius	The hitch, the one-third rule if an eye is involved, and whether protection travels with the article
4	The bight or wrap count, and how the passes are to lie	The contact arrangement, and whether the load is shared or concentrated
5	The surface, the environment and the duty	The fibre, the fittings, and whether the article needs a construction beyond the standard one
6	The marking and the documents the site has to hold	What the label says, what the certificate names, and what is kept in the file

7. Where a Made-Up Article Is the Wrong Answer

A made-up article is the right answer when the load cannot be served by a standard sling, and the wrong answer when it can. The three symptoms below are worth checking before an enquiry goes out, because a bespoke article is a longer lead time, a single source and a drawing that has to be right, and none of those costs is worth paying for a load a stock sling would lift.

The symptom	Why it is worth re-checking	What to look at instead
The load is awkward but not unusual	The operations are being used to avoid a rigging question rather than to answer one	the heavy duty round sling class page for what the standard forms are for
A wrap is being used to spread a load a spreader would carry	Wraps concentrate where they cross; a spreader separates	the web sling bridle assembly page, where the assembly and its rating are set out
A splice is being specified to make a length that already exists	A seam in the load path is a cost, and it is only worth paying for a shape that cannot be bought	the standard round forms, where the load path is continuous

8. Marking, and How a Made-Up Article Is Identified

The identification rules do not change because the article is bespoke; if anything they matter more, because there is no catalogue entry to look the article up in. 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 a made-up article the certificate has to name the article rather than a production week, and the marking has to be legible for as long as the article is in service.

The element	What it carries	Why it matters on a made-up article
The marking	The rated capacities for each type of hitch, and the type of synthetic material	There is no catalogue entry to fall back on: the label is the article's identity
The certificate	What was tested, to what figure, and which article it names	It answers the auditor's question about an article that exists once
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 duty envelope	Temperature and chemical exclusions, for the belt and for its fittings	A bespoke article can be ordered into an environment a standard sling would not be offered for

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. 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, and on a spliced article the stitching is a first-class item on that list rather than a footnote to it.

Repairs belong to the manufacturer or an equivalent entity. A load-bearing splice is not repaired, temporary repairs are prohibited, and 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.

10. Frequently Asked Questions

Q1: What is a splicing, threading, wrapping sling?

A lifting belt made up to suit a load by one or more of three operations: splicing, which joins or closes the webbing; threading, which passes the belt through an eye, a loop or an opening; and wrapping, which winds it round a section of the load.

Q2: Can the three be combined?

Yes, and they often are. A wrapped and threaded article is a different object from a wrapped one, so the combination has to be stated in the order and drawn rather than left to be interpreted on site.

Q3: How strong is a splice?

The requirement is that the seam be made to develop the full breaking strength of the sling: stitching is the only method permitted for attaching fittings and forming eyes, the thread has to be in an even pattern, and it has to carry enough stitches to do the job.

Q4: Can a torn splice be stitched on site?

No. A load-bearing splice is not repaired and temporary repairs are prohibited. The article is repaired by the manufacturer or an equivalent entity and returns to service only after a proof test to twice its rated capacity, with the certificate retained.

Q5: How wide may the fitting be in the eye?

An object placed in the eye of a sling is not to be wider than one-third of the length of the eye. Beyond that the eye is loaded in a way the rated configuration does not describe.

Q6: How many wraps should a wrapped sling have?

Enough that the wraps lie flat against one another and against the load, and are stated in the order. Wraps that cross or bunch concentrate the load and are outside the rated arrangement, since constricted or bunched loading is prohibited.

Q7: Does wrapping increase the capacity?

It changes how the load is carried, not what the belt is rated to. The rated capacity belongs to the hitch and the angle, and the load's own surface decides whether a wrap spreads the load or concentrates it.

Q8: Is a made-up article more expensive?

It is a different purchase: a longer lead time, a drawing that has to be right, and an article that exists once. Where a standard sling will serve the load, the standard sling is the better answer.

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: What temperature can it work at?

It depends on the fibre and on which published figure is used: minus 40 to plus 100 degrees C for polyester and polyamide, 90 degrees C as the upper figure in the guidance for synthetic slings, and 180 degrees F for polyester and nylon in the regulation. Work to the lowest published figure and keep the source with it.

Contact

Send the six lines in section 6, with a sketch of the span and the passes, and we will come back with the questions that are missing. Made-up articles are batch tested, marked per hitch and supplied with a certificate that names the article.