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Contact: Wang Lili

E-mail：18066002268

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Address: Lifute Industrial Park, Taizhou City, Jiangsu Province

Two end buckle flat lifting strap, thickened two end buckle flat white lifting strap

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：2026-09-21 11:11

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Lift Sling Rigging Co., Ltd. +8618066002268 produce Two end buckle flat lifting strap, thickened two end buckle flat white lifting strap

Circular Flat Lifting Belt — a Closed Loop in the Flat Family, Not a Roundsling

A circular flat lifting belt is a flat woven webbing belt closed into a loop, and the two words in its name are the two things that confuse buyers about it. Circular suggests the round family — and a roundsling is a different article under a different standard. Flat is the word that governs, and the standard that governs with it is EN 1492-1, whose own scope covers single-, two-, three-, four-leg and endless sewn flat woven webbing slings, in webbing 25 mm to 450 mm wide, made of polyamide, polyester or polypropylene (§2). So this article is an endless sewn flat woven sling: a closed loop in the flat family, with edges like every flat sling and a load path that runs through a sewn seam, because sewing is the joining method this family allows (§3). The standard counts seam construction among the factors it cares about, which tells a buyer where the engineering attention was spent. The comparison with a roundsling — sleeved endless core, no edges, no seam, EN 1492-2 — is set out in §4, and it is the single most useful thing to read before ordering either. Capacity still comes off the family's colour code and the label (§5, §9), the inspection criteria are the flat family's (§7), and the standard's own temperature range is quoted in §8 alongside the lower figure United States rules impose. Standard EN 1492-1, factor 7:1, HS code 630790. Telephone 18066002268.

1. Four Names, and the One Word That Decides Which Standard Applies

This article is listed under four names — Circular flat lifting belt, circular flat sling, circular flat lifting belt again, and circular flat lifting rope. They describe one product, and the repetition is a fair reflection of how the trade talks: the same band is a belt, a sling or a rope depending on who is buying it. None of those three nouns carries a technical distinction.

The word that does carry one is flat, and it is the word that decides which of this site's two textile families the article belongs to. Circular describes the shape — the band is closed into a loop. Flat describes the construction — it is woven as a flat band, with two selvage edges and a rectangular section. Those are independent properties, and it is their combination that is worth understanding, because a closed loop is exactly what a roundsling is too, and the two are governed by different standards and behave differently in service.

The simplest way to hold the distinction is this: a loop can be made by closing a flat band, or by sleeving a core, and only one of those is a roundsling. Where the load path is a woven band sewn closed on itself, the article is an endless sewn flat woven webbing sling — a category the standard names in its own scope (§2) — and it is a flat sling in every respect that matters. Where the load path is a bundle of parallel yarn inside a woven tube, the article is a roundsling, and EN 1492-2 applies. This page's article is the first. The sleeved round form, and the contact-point rules that go with it, live on the circular lifting straps page and the endless round sling page.

The question	A circular flat lifting belt	A roundsling
What is the load path?	A flat woven band, closed into a loop by sewing	Parallel yarn running inside a woven sleeve
Which standard?	EN 1492-1, whose scope names the endless sewn sling as a type	EN 1492-2, roundslings
Does it have edges?	Yes — two selvage edges, and the standard requires that they not be split from the webbing's width	No, in the sense that matters: the sleeve encloses the core
Is there a joining?	Yes — a sewn seam closes the band, and seam construction is one of the standard's own factors	No joining in the load path at all; the core is one continuous loop
Which capacity signal?	The same colour code, applied to the flat family's webbing	The same colour code, applied to a sleeved round article

2. The Standard Names It: Where the Endless Sewn Sling Sits in EN 1492-1

The scope of EN 1492-1 is worth quoting, because it settles the naming question in §1 without any interpretation. The standard specifies the requirements related to safety, including methods of rating and testing single-, two-, three-, four-leg and endless sewn flat woven webbing slings, with or without fittings, made of polyamide, polyester and polypropylene man-made fibre webbing in the width range of 25 mm to 450 mm. An endless sewn sling is therefore not an oddity or a workaround; it is one of the types the standard exists for, sitting alongside the leg-count variants.

Two more parts of that scope matter to anyone ordering this article. The first is what the standard is for: general purpose lifting operations, where the lift requires no deviations from the requirements, safety factors or working load limits specified. The second is what it is not for, and the list is explicit — lifting of persons, and potentially dangerous materials such as molten metal and acids, glass sheets, fissile materials, nuclear reactors, and other cases where special conditions apply. An endless flat belt is a general purpose article, and a lift outside that description is not a lift this standard covers.

There are also three things the standard explicitly does not apply to, and one of them is worth naming here because this site lists such articles separately: slings such as bag slings and nets, adjustable slings containing intermediate buckles stitched along the webbing, slings woven from monofilament yarns, and slings designed for pre-slinging and intended not to be re-used. That last exclusion is why the disposable articles are their own listings rather than variants of this one — a single-use sling is outside the general purpose standard by its own definition, not by a difference in quality.

What the standard says	The wording	What it means for this article
The types it covers	single-, two-, three-, four-leg and endless sewn flat woven webbing slings, with or without fittings	The endless sewn form is a named type, so the article has its own place in the standard rather than being derived from another
The materials and widths	polyamide, polyester and polypropylene webbing; 25 mm to 450 mm wide	Fibre and width are part of the specification, not incidental — and the fibre decides the chemical exclusions (§8)
What it is for	General purpose lifting, with no deviations from the requirements, safety factors or working load limits specified	A clean boundary: inside it the published figures apply, outside it they do not
What it is not for	Lifting of persons; molten metal and acids, glass sheets, fissile materials, nuclear reactors, and special conditions	These are exclusions of the standard, not cautions — the article is not rated for them at all
Three things it does not apply to	Bag slings and nets; adjustable slings with buckles stitched along the webbing; monofilament webbing; and slings for pre-slinging not intended to be re-used	A single-use sling is outside this standard by definition, which is why it is a separate article here

3. How the Loop Is Closed: the Seam, and Why the Standard Cares About It

A flat band becomes a circular belt in exactly one place, and that place is a sewn seam. The standard's own summary of what it covers includes seam construction among the key factors it specifies, alongside effective working length and the safe use instructions — which is a plain statement that the join is not an incidental detail of the article but one of the things the standard is written around.

Why the family works this way is worth stating, because it explains a rule that otherwise reads as arbitrary. In flat woven slings, stitching is the only method used to attach end fittings to webbing and to form eyes, in an even pattern and with a sufficient number of stitches to develop the full breaking strength of the sling. Nothing else is permitted — no clamps, no rivets, no knots — and the reason is that a sewn joint spreads load across many threads in shear rather than concentrating it at a few hard points. An endless sling is the same principle applied to the band itself: the belt is closed by sewing, because sewing is the only joining the family allows.

Two practical consequences follow directly. The seam is part of the load path, so it has to be inspected like one — broken or worn stitching is a removal criterion in its own right, not a cosmetic defect (§6). And the seam is a place where the article is thicker and stiffer than the webbing beside it, which matters when the belt is bent around hardware: the transition from single thickness to lap thickness is where a bend is least even, and it is the reason the seam should not be positioned where the belt has to wrap tightly (§4).

About the seam	What is true	What it means at the point of use
It is the only joining in the article	Stitching is the only method this family uses to form eyes and attach fittings	Everything the belt carries passes through this one place, however long the belt is
The standard specifies it	Seam construction is one of the factors the standard names, with an even stitch pattern and enough stitches for full breaking strength	A seam is a specification item to ask about, not something to take on trust
It is a doubled-thickness zone	The lap is thicker and stiffer than the webbing beside it	Keep it out of tight bends and away from the choke point; wrap with single thickness where the belt bends
It can be positioned	The maker decides where the join falls on the loop	Where a lift always bends the belt at the same point, a seam placed away from it will outlive one placed on it
It is not repairable by the user	Load-bearing stitching may not be repaired; repairs are the manufacturer's or a qualified person's work	A worn seam retires the belt. It is the one place where a small amount of visible damage is decisive

4. No Free Ends: What a Closed Belt Makes Possible, and What It Does Not Excuse

The most obvious difference between this article and an eye-and-eye sling is that it has no ends. There is nothing to thread through a shackle and nothing to hook; the belt is already a loop, and a loop can be passed around or under a load and then hooked anywhere along its own length. That is a real advantage in tight geometry, and it is the same advantage the sleeved round form has.

Three practical points come with it, and each of them is a rule rather than a preference. The belt can be choked at any point along its length, which distributes wear if the user varies the point — an advantage a fixed-eye sling does not have. But the choke point should not be placed on the seam, which is this article's only splice, for the reason in §3: the seam is a doubled-thickness zone where a bend is least even, so choking down on it works the belt at the point it is least able to accommodate it. And a sling is never shortened or lengthened by knotting or twisting — with a closed loop there is nothing to adjust anyway, and a knot in the body is a removal criterion in this family, not an improvised size change.

There is one further duty that a closed loop imposes, and it is easy to miss because nothing about the article looks wrong. A loop cannot be inspected by laying it out flat and looking at it once: the same length of webbing passes through the same place repeatedly, so wear concentrates at the points the lift always uses while the rest of the belt stays new. The published practice for this family is a visual check before every use, and on an endless belt that check has to travel the whole loop rather than the section that is easiest to see (§6, §9).

Property of a closed belt	The advantage	The rule that comes with it
No ends to thread	Can be passed around a load and hooked anywhere along its length; useful where a fitting will not fit	The capacity is the capacity of the loop as hitched — the belt has no end eye to read a figure from
The choke point can be moved	Wear can be spread around the loop instead of concentrated in one place	Keep the choke point off the seam: it is the article's only splice, and its stiffest zone (§3)
Nothing to adjust	No hardware and no loose end to work slack; the article is simple and has few failure sites	Never knot or twist a sling to shorten it; a knot in the body puts the article out of service
A long loop in one piece	The whole belt is available as spare surface; a worn section can be moved out of the contact	Inspection has to travel the whole loop, because wear sits where the lift always grips
No metal in the article	Nothing to corrode, nothing to distort, nothing with a sharp edge of its own	The hardware it is used on is then the only hardware in the lift, and it still has to be clean and free of sharp edges

5. Capacity: the Same Colour Code, Read the Same Way

The belt carries the family's colour code, and the code is a shorthand for one figure: the straight single-leg vertical capacity. It says nothing about a basket, nothing about a choker, and nothing about a multi-leg arrangement, each of which has its own published figure. The colour is a field check; the label is the record, and it states the working load limit together with the material and the length (§8).

The reason this page does not reproduce the full colour table is that it is already set out in full — with the capacity each colour denotes and the important note that the code stops at orange, meaning ten tonnes and up — on the 30 ton flexible lifting belt page, which takes capacity bands and the effect of the horizontal angle as its own subject. What belongs on this page is the reminder that the code describes an article, and this article is a loop: the figure is the figure for the loop used vertically.

Two articles in this family are worth keeping apart when reading a colour, and both are listed on this site. A single-layer belt and a multi-layer or thickened one can carry the same colour at the same working load limit while being different articles to handle, wear and bend; the layer count is a construction choice within the standard's range, not a statement about capacity. And a belt whose webbing is coated is a durability variant of the same article, covered on the wear resistant flat sling page, where what a coating does and does not buy is worked through.

Question about capacity	The answer
What does the colour mean?	The straight single-leg vertical capacity for the flat family; the full table is on the 30 ton page
Does the colour change with the hitch?	No. The hitch has its own figure, and the label states the rated load for the types of hitch the article is rated for
Does a thicker or multi-layer belt lift more?	Not because it is thicker. Layer count and thickness are construction within the standard's range; capacity is set by the rating
What is the factor?	Commonly 7:1 in this family, and worth having stated in writing rather than assumed
Where does the definitive number live?	On the label and in the documents, which is why §8 is about marking and not about colours

6. Inspection: Reading a Loop Rather Than a Sling

The inspection regime for this article is the flat family's: a visual check before every use, with a documented periodic inspection at least annually, and the standard itself requires visual and manual inspections of all completed slings as part of manufacture. What is different about an endless belt is not the interval but the route the inspection takes, and the reasons are in §4: the same webbing returns to the same place, so wear concentrates where the lift always grips while the rest of the loop looks new.

So the check travels the whole belt. On a flat woven article the criteria are the family's own, and the ones to look for are missing or illegible identification, acid or caustic burns, melting or charring of any part of the sling, holes, tears, cuts or snags, broken or worn stitching in load-bearing splices, excessive abrasive wear, knots in any part of the sling, discolouration and brittle or stiff areas, and damaged fittings where the article has any. Where any such damage is present, the sling is removed from service immediately. On this article the seam is a load-bearing splice, so the fourth item is not an abstract one — it is the join in §3.

Two items deserve a sentence each because they are unique to the flat construction. The selvage edges must not be split from the webbing's width: a frayed or separating edge is a defect in the article, not surface wear, and it is the failure a flat band is naturally prone to because it presents edges to whatever it crosses. And a knot anywhere in the body is a removal criterion rather than a repair — on a closed belt there is no legitimate reason for one, since the article has no ends to adjust.

Criterion	Where it shows on an endless flat belt	Action
Missing or illegible identification	The label is gone or unreadable, so the figure cannot be established	Remove from service; the colour is a field check and not a substitute (§8)
Broken or worn stitching in load-bearing splices	Disturbed thread at the seam that closes the loop (§3)	Remove from service; load-bearing stitching is not repairable by the user
Excessive abrasive wear	Usually at one contact point the lift always uses, not evenly around the loop	Remove from service; vary the contact point on the replacement if the geometry allows
Holes, tears, cuts or snags	Any break in the band, most likely where it crosses a load edge or a fitting	Remove from service; check whether protection was needed at that point (§4 in the linked pages)
A split selvage edge	An edge separating from the webbing's width — the flat construction's own failure mode	Remove from service; the standard requires edges not to be split from the width
Knots in any part of the sling	A knot in the body, which on a closed belt serves no purpose at all	Remove from service; never knot or twist a sling to shorten it
Acid or caustic burns; melting or charring; brittleness or discolouration	Stiff, glazed or discoloured areas, which often look like surface marks and are not	Remove from service and look at the environment, because the cause is still in the workshop (§7)

7. Temperature and Chemicals: Two Published Sets of Figures, and Which to Work to

This is the section where a buyer who has compared two documents will have found what looks like a contradiction, and it is worth settling properly rather than quoting one number and hoping.

The standard sets a temperature range per fibre. Flat woven webbing slings conforming to EN 1492-1 are suitable for use and storage, in the standard's own words, from minus 40 °C to 100 °C for polyester and polyamide, and from minus 40 °C to 80 °C for polypropylene. United States rules set the limits the other way round. The general industry sling regulation puts synthetic web slings of polyester and nylon at not above 180 °F and polypropylene at not above 200 °F, and the occupational guidance for synthetic web slings states 194 °F (90 °C) for nylon and polyester with a lower bound of minus 40 °F (minus 40 °C).

Two things follow, and both are worth knowing before the enquiry is written. The two regimes rank polypropylene oppositely: under the standard it has the lower ceiling of the two fibres, and under the United States rule the higher one. And the numbers do not coincide at all — 100 °C against 180 °F, which is about 82 °C. Where a lift is governed by both, the answer is not to pick the document one prefers but to work to the lower of the figures that apply, which is also what a purchaser should expect to see stated rather than assumed.

Chemicals are handled as exclusions rather than as a scale, and they are fibre-specific in the same way: nylon web slings may not be used where fumes, vapours, sprays, mists or liquids of acids or phenolics are present, and polyester and polypropylene web slings may not be used where caustics are present. Note the practical consequence of the two rules together — the question "which fibre for a chemical plant?" has no general answer, only an answer for a named chemistry. And a further exclusion bears on the fittings rather than the webbing: web slings with aluminium fittings may not be used in the presence of caustics, which matters on an assembly even where the belt itself has no metal (§9). Storage belongs with these rules: slings are to be stored where they are not subjected to mechanical, chemical or ultra-violet damage or to extreme temperatures, and the standard's range above is a range for use and storage rather than for use alone.

Exposure	The standard's figure	The United States figure
Polyester and polyamide or nylon	−40 °C to 100 °C	Not above 180 °F; the guidance states 194 °F (90 °C); not below −40 °F
Polypropylene	−40 °C to 80 °C — the lower ceiling of the two fibres	Not above 200 °F — the higher ceiling of the two fibres
Where both apply	Work to the lower of the applicable figures, and have the figure you are working to written into the order
Acids and phenolics	Nylon web slings are excluded where fumes, vapours, sprays, mists or liquids are present
Caustics	Polyester and polypropylene web slings are excluded, and so are web slings with aluminium fittings
Sunlight and storage	Store where the sling is not subjected to mechanical, chemical or ultra-violet damage, or to extreme temperatures

8. Marking and Traceability: What Has to Be Legible on the Belt

The standard requires marking that a user can act on, and the list is worth having in front of you when an article arrives. Marking for this family includes the working load limit, the material, the fitting grade where fittings are used, the length, the manufacturer's identification and a traceability code, with the label colour-coded on the basis of the webbing material and the information required to be suitable and durable for the life of the article.

Where the same article is used under United States practice, the marking requirement is stated from the other direction and adds one item that matters here: slings are marked to show the rated capacities for each type of hitch and the type of synthetic web material. The difference between the two lists is the difference between a figure and a figure-with-its-conditions, and for a closed belt that distinction carries real weight — because a loop has no end eye to hint at which hitch the figure belongs to, the labelling is the only place that information can live (§5).

The traceability code deserves a sentence of its own, since it is the item most often treated as paperwork. On a belt that lasts for years and passes through several hands, the code is what connects the article to its batch and its test record — which is how a site answers the question "what is this and where did it come from" without relying on the memory of whoever bought it. It is also the thing that makes a claim about capacity checkable rather than asserted, which is the standard this site applies to every delivery in this family.

Marked item	Where the requirement comes from	What it settles in service
Working load limit	Both the standard and the United States rule	The figure the colour only points at; without it the article cannot be used
Rated capacities for each type of hitch	The United States rule for this family	Which hitch the figure belongs to — the item a closed loop cannot communicate any other way
Material, and the material colour code	The standard, which colours the label by webbing material	Whether the article may go into a given environment at all (§7)
Length	The standard, along with effective working length	The geometry of the hitch, and whether two belts can be used as a matched pair
Manufacturer and traceability code	The standard	Who made it, which batch it came from, and where its test record sits
Fitting grade, where fittings are used	The standard	Whether the hardware matches the article — relevant if this belt is ordered with fittings rather than plain

9. An Honest Note: This Site Lists This Article in Several Overlapping Names

A buyer comparing listings will notice something immediately, and it is better said here than discovered by accident. In the Lifting sling category on this site, twenty-four product listings carry both the word circular and the word flat in their titles — among them Flat circular sling, Circular flat sling, Single layer circular flat sling, Double layer circular flat sling, Circular flat double-layer sling, Colorful flat circular lifting belt, Polyester circular lifting belt, and a listing whose title is simply the phrase repeated five times. Three of the articles in that group are genuinely distinguished by construction — single layer, double layer, and thickened multi-layer are real differences in the product. The rest read as the same article described again in different words.

The same is true of a second group. The endless form of a webbing sling is covered on this site by a set of pages — endless webbing sling and a family of tonnage-specific pages from one tonne to eight tonnes — which together describe the endless article thoroughly. This page deliberately does not repeat that material: it takes the question those pages do not answer, which is which family a closed flat belt belongs to, and what its seam means (§1 to §4).

The practical advice is the same as it would be for any catalogue in this state. Buy on the specification, not on the listing: state the working load limit, the fibre, the width, the length, the hitch and the environment, and let the answer be one article with one figure. And where two listings turn out to describe one product, the right remedy is to have the site treat them as one — a set of near-identical pages competing for the same words divides its own ranking rather than adding to it, and the correct fix is a single page with the duplicates pointing at it. That is a site-level decision rather than a purchasing one, and it is raised here so that the person who can make it has the measurement in front of them.

Group of listings	What genuinely separates members of it	Suggested treatment
Circular flat belts and slings	Layer count — single, double and thickened multi-layer are distinct articles; the rest are rewordings	Keep one listing per layer count and consolidate the rewordings onto them
Endless webbing slings	Capacity band, on the tonnage-specific pages that already carry content	Already written; this page links to them rather than duplicating them
Disposable and pre-slinging articles	They are outside this standard by definition, since pre-slinging slings not intended to be re-used are excluded from its scope (§2)	Keep separate from the general purpose family, and say why on the pages themselves

10. Using a Closed Belt: the Practices That Apply to Every Lift

Some rules apply to this article not because it is a closed flat belt but because it is a sling, and they are worth keeping in one place for the person who reads only this page. They are short, and every one of them exists because the failure it prevents is common.

Do not use the sling with loads in excess of the rated load capacities. Do not allow shock loading, since taking up slack suddenly multiplies the load well beyond its static value. Do not drag a sling across the floor or over abrasive surfaces, and do not rest loads on it or pull it from under a load that is resting on it. Avoid twisting and kinking, keep personnel clear of the areas between the sling and the load and between the sling and the hook, and never let anyone stand in line with or next to a leg under tension or under a suspended load.

Circular flat lifting belt, flat woven webbing belt closed into a loop, laid out on the workshop floor with the sewn seam visible

One loop, one seam, two edges. The article is a flat woven belt closed on itself, so its load path passes through the join in the middle of the picture and its edges face whatever it crosses (§1, §3).

Two of those rules deserve a sentence in the context of this article. Dragging is the single most common way a flat belt is consumed early, because a woven band has edges and a workshop floor is an abrasive surface. And standing in line with a leg under tension is the rule that matters most where a closed belt is chosen precisely because it can be rigged in tight geometry — the awkward rig is the one where people end up in the wrong place.

11. Ordering This Belt: What to Put in the Enquiry

The enquiry is a short specification, and every line in it changes either what is supplied or whether the article can be used. State the working load limit and the hitch, since those two together are what the label has to carry (§8). State the fibre — polyamide, polyester or polypropylene — because the fibre decides which environments the article is excluded from, and the standard's own temperature range is per fibre (§7). State the width, which the standard bounds at 25 mm to 450 mm, and the layer count — single, double or multi-layer — because those are the real differences inside this group of listings (§9). State the length and whether it is a working length or the overall circumference of the loop, since a closed belt has no ends and the two are not the same measurement. State the environment: chemistry, temperature and sunlight (§7). And state the documents and marking your site has to hold, so that the traceability code and the test record arrive with the article rather than being chased afterwards.

One line is worth adding that buyers often leave out: where the belt will bend. Because the seam is the only doubled-thickness zone in the article (§3), telling the maker which part of the loop takes the bend lets the join be placed away from it — a small piece of information that changes how long the belt lasts.

What to state	What it decides
Working load limit and hitch	The figure on the label and the colour on the belt; a figure without its hitch is not a rating
Fibre, and the fitting material if any	Which chemical exclusions apply, and which temperature range governs (§7)
Width, within 25 mm to 450 mm	The range the standard covers, and how the belt sits in the hitch
Layer count: single, double or multi-layer	The real distinction among the overlapping listings, and the belt's stiffness in a bend (§9)
Length, and whether it is circumference or working length	The geometry of the rig on a loop that has no ends to take up slack
Where the belt will bend	Where the seam is placed, and therefore how long the article lasts (§3)
Environment and documents	The exclusions that apply, and the marking and test record that must travel with the belt (§7, §8)

12. Frequently Asked Questions

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

No. Both are closed loops, and they are governed by different standards. This article is a flat woven webbing belt closed on itself by sewing, which the standard names as an endless sewn flat woven webbing sling, under EN 1492-1. A roundsling is a bundle of parallel yarn inside a woven sleeve, under EN 1492-2. The difference decides the load path, whether the article has edges, and whether it has a seam at all (§1, §4).

Q2: Which standard covers it, and what does that standard include?

EN 1492-1, whose scope covers single-, two-, three-, four-leg and endless sewn flat woven webbing slings, with or without fittings, in polyamide, polyester or polypropylene webbing 25 mm to 450 mm wide, at a typical factor of 7:1. The endless sewn type is a named category, not a variant derived from another (§2).

Q3: How is the loop actually closed?

By a sewn seam. In this family stitching is the only method used to form eyes and attach fittings, and the standard names seam construction among the factors it specifies. So the join is part of the load path rather than a finishing detail, and it is inspected as one (§3, §6).

Q4: Why does the seam matter at the point of use?

Because it is the only doubled-thickness, stiffer zone in the article. Where the belt has to wrap tightly around hardware, the transition from single thickness to lap thickness is where a bend is least even — so the seam should be kept out of tight bends, and the choke point should never be placed on it (§3, §4).

Q5: Does having no ends make it stronger or weaker?

Neither. It makes it different to rig. There is nothing to thread, so the belt can be passed around a load and hooked anywhere along its length, and the choke point can be moved to spread wear. In exchange, the whole load passes through the one seam however long the belt is, and there is no end eye to hint at which hitch a figure belongs to — which is why the label matters more, not less (§4, §8).

Q6: What does the colour tell me?

The straight single-leg vertical capacity, in the flat family's colour code, whose full table is set out on the 30 ton flexible lifting belt page. The code stops at orange, which means ten tonnes and up. It is a field check; the working load limit on the label is the record (§5).

Q7: What temperatures can it take?

The standard gives a range per fibre: minus 40 °C to 100 °C for polyester and polyamide, and minus 40 °C to 80 °C for polypropylene, for use and storage. United States rules put polyester and nylon at not above 180 °F and polypropylene at not above 200 °F. The two regimes rank polypropylene oppositely, so where both apply, work to the lower of the figures that apply (§7).

Q8: Which fibre for a chemical environment?

There is no general answer, only an answer for a named chemistry. Nylon web slings are excluded where fumes, vapours, sprays, mists or liquids of acids or phenolics are present; polyester and polypropylene web slings are excluded where caustics are present; and so are web slings with aluminium fittings. Name the chemistry, not the industry (§7).

Q9: What retires the belt?

Missing or illegible identification; acid or caustic burns; melting or charring; holes, tears, cuts or snags; broken or worn stitching in load-bearing splices — which on this article is the seam; excessive abrasive wear; a knot anywhere in the body; a split selvage edge; and discolouration or brittle, stiff areas. Any of these means removal from service immediately (§6).

Q10: I have found several similar listings on this site. Which is this one?

This is the endless sewn flat belt without fittings — a flat woven band closed into a loop. The twenty-four listings that carry both words in their titles include genuinely different articles distinguished by layer count (single, double, multi-layer), and a separate group that describes the endless form by capacity band. §9 sets out what separates them and recommends how the site should treat the overlapping ones. HS code 630790, telephone 18066002268.

Contact

Send the working load limit and the hitch, the fibre, the width, the length of the loop, the environment and where the belt has to bend — and we will confirm the article, the seam position and the marking that travels with it.