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Contact: Wang Lili

E-mail：18066002268

Phone：702461526@qq.com

Address: Lifute Industrial Park, Taizhou City, Jiangsu Province

Cylindrical sling

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 09:24

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Lift Sling Rigging Co., Ltd manufacture Cylindrical sling, cylindrical lifting belt, cylindrical webbing sling.

Cylindrical sling — The Tube, the Core It Hides, and the Ends It Needs

A cylindrical sling is not a flat band with a different name. It is a woven tube, and the tube is the reason the form exists: the load-bearing element is wound inside it, the surface that meets the load has no edge to present in any direction, and the article can be threaded or wrapped where a flat band would have to be laid. The same construction has three consequences that are easy to miss - a core you cannot see, an end you have to choose because a tube has to be attached to something, and a tube diameter that belongs to the rating rather than to the description. This page carries the factory's own parameter table with the reading it needs, and leaves the full column-by-column legend to the flexible lifting strap page, which carries the same table. HS code 630790; telephone 18066002268.

1. What Makes an Article Cylindrical

Three constructions are sold for the same jobs and they are not interchangeable. A flat sling is a band: the load-bearing material is piled in plies and sewn, so the article has two faces and four edges. A round sling is a closed loop of wound yarn inside a sleeve, so the load path has no end at all. A cylindrical sling is a tube: the load-bearing element is wound inside a woven cover that runs the length of the article, and the shape the load meets is a surface with a circumference rather than a width.

That is a construction difference with practical consequences, and they are the subject of this page rather than a list of features. A tube presents no edge, so the load meets a curve. It conforms in every direction, so the contact does not depend on how the article happens to be rotated. And it encloses its own core, which is the reason the inspection of a cylindrical sling looks at the outside of a thing whose strength is on the inside.

A cylindrical sling: a woven tube with the load-bearing element wound inside it. This is the factory's own photograph, placed here because the tube is the first thing to establish: the shape that meets the load is a surface, not an edge, and the part that carries the load is the part that cannot be seen.

2. The Parameter Table on This Page

产品编号 ITEM NO	颜色 COLOR	破断载荷 Braking （KG）	额定载荷 WLL（KG）	栓绳吊升 P=0.8（KG）	45°角吊升 P=1.8（KG）	90°角吊升 P=1.4（KG）	近似直径 Equal Rope（MM）	重量(kg/m)
FA01		6000	1000	800	1800	1400	18	0.47
FA02		12000	2000	1600	3600	2800	20	0.60
FA03		18000	3000	2400	5400	4200	22	0.82
FA04		24000	4000	3200	7200	5600		1.20
FA05		30000	5000	4000	9000	7000	27	1.47
FA06		36000	6000	4800	10800	8400		1.70
FA08		48000	8000	6400	14400	11200	38	2.20
FA10		60000	10000	8000	18000	14000	45	3.00
FA12		72000	12000	9600	21600	16800	49
FA15		90000	15000	12000	27000	21000	58	4.00
FA20		120000	20000	16000	36000	28000	64	5.60
FA25		150000	25000	20000	45000	35000		6.80
FA30		180000	30000	24000	54000	42000	78	8.20
FA40		240000	40000	32000	72000	56000	83	10.9
FA50		300000	50000	40000	90000	70000	96	13.8
FA60		360000	60000	48000	108000	84000	105	16.6
FA70		420000	70000	56000	126000	98000	113	19.3
FA80		480000	80000	64000	144000	112000	127	22.0
FA90		540000	90000	72000	162000	126000	139	24.3
FA100		600000	100000	80000	180000	140000	150	27.0

The sheet is laid out in the sections the buyer needs, and the columns are the same ones used across this site: the item number and colour, the breaking load and the rated load, three figures for three ways of lifting, the equivalent rope diameter and the weight per metre. The full column-by-column reading, including what the three mode factors mean and why the 90 degree column is not twice the vertical figure, is set out on the flexible lifting strap page, which carries this same table; what follows here is what changes because the article is a tube.

Column	What it means for a cylindrical article in particular
ITEM NO	The row, and with it the tube's own diameter: the item number is the only thing worth quoting back
COLOR	A cue for sorting and recognition; the capacity is in the columns and on the marking
BRAKING (KG)	The figure the article fails at in a test, not the figure a lift may be planned from
WLL (KG)	The rated load for a vertical single-leg lift. This is the figure a lift is planned from
P=0.8 / P=1.8 / P=1.4	The rated load for a choke hitch, for two legs at 45 degrees and for two legs at 90 degrees
EQUAL ROPE (MM)	The diameter of rope the article is equivalent to, and the figure that matters when the load is round
WEIGHT (KG/M)	The mass per metre, which decides how the tube is carried, stored and dressed

3. What the Tube Changes at the Contact

A flat band meets a load along a width and at two edges; a tube meets it along a curve. On a load that is itself round or curved, that difference is not cosmetic: the band has to be turned to sit well and can present a folded edge if it is not, while the tube sits the same way whatever its orientation, because every direction on its surface is the same direction.

The load	What a flat band does	What a cylindrical article does
A round load, such as a pipe or a roll	Touches along a line, and the two edges of the band sit against the curve	Conforms to the curve with the whole of the surface that is in contact
A load with a corner	Presents an edge to the corner unless it is padded	Still needs protection: a tube has no edge, but the corner does, so padded or protected according to the rule
A load with an opening or a bore	Has to be threaded flat, which needs clearance on both sides	Can be threaded as a tube, which is often the only way in on a tight access
A finished surface	Can mark the load with its edge or its weave	Spreads the same load over a curve, which is usually kinder to paint, coating and plating

The conformity of the article is a property of the construction and not of the load, which is why the circular circular lifting belt page separates conformity from elongation: the article bends because it is soft, and it does not stretch because it is a lifting article. The two are decided separately and confused constantly.

4. What the Tube Hides, and How It Is Inspected

The load-bearing element of this article is wound inside the cover, so an inspector is looking at the outside of the thing that carries the load. That is not a defect of the construction; it is the reason the published removal conditions are written in terms of what can be seen, and the reason a cut in the cover is taken seriously rather than treated as cosmetic.

The surface	What it shows	What it hides
The cover	Wear, cuts, burns, charring, embedded grit, and the printing of the marking	The core, which is the part that carries the load
The ends	Where the article is attached, and where the cover is most severely worked	Wear that has moved inside the tube since the last inspection
The marking	Whether the figure, the hitch columns and the material are still legible	Nothing, and that is the point: an illegible marking ends the article's service
The inside of the tube	Nothing at all: it cannot be inspected once the cover is closed	Everything, which is why the conditions that remove a sling from service include snags, punctures, tears and cuts

5. The Ends: a Tube Has to Be Attached to Something

A tube is a body, not a complete attachment, so the ends are a separate decision and they are where the same article becomes three different products. The choice is made from the hardware and the hitch rather than from the capacity, and each form has its own page on this site.

The end	What it suits	Where the detail is written
An eye formed at each end	Attaching to a hook or a shackle at both ends, or using the article as a sling with two loaded ends	The circular eye shaped lifting belt page
A closed loop, with no free end	Wrapping a load and using the article as a continuous loop, where nothing has to be hooked	The class page, heavy duty round sling
A buckle, closing the loop at the article rather than at the load	Where wrapping is the method and a closure is needed in the article itself	The double buckle core wrapped sling page

What does not change with the end is the rule about the load path: the attachment has to be rated at least equal to the sling, it has to be free of sharp edges, and an object in an eye is not to be wider than one third of the length of that eye. The web sling bridle assembly page covers the case where several of these articles are brought together into one rated assembly.

6. Why the Tube's Diameter Is on the Sheet

The equal rope diameter column is often read as a description and it is closer to an input. A lifting article is rated for the diameter it is loaded over, because the diameter of curvature over which a sling is used is one of the bases a rated load is calculated from. On a cylindrical article the diameter is also a physical fact of the article: a tube of a larger diameter spreads its contact over a larger curve, and the sheet records the diameter rather than leaving it to be measured in the store.

The figure	What it is for	Where it is misused
EQUAL ROPE (MM)	Comparing this article with a rope of the same service diameter, and knowing how it will sit on a round load	Read as a rating, which it is not: the rating is in the capacity columns
Diameter of curvature	One of the bases of the rated load: the sling is rated for the diameter it is used over	Assumed to be whatever the load happens to be, which is how a figure gets used outside its column
WEIGHT (KG/M)	Deciding how the article is carried, stored and dressed, and whether a second person is needed	Treated as a footnote, which it is on the small rows and is not on the large ones

7. The Duty Envelope, Which the Sheet Does Not Show

Nothing on the parameter sheet is about temperature or chemistry, and both decide whether a row of it can be used at all: the envelope follows the fibre, and the published figures have to be reconciled before they are quoted. For polyester and polyamide the published guides give minus 40 to plus 100 degrees C, the guidance for synthetic slings gives 90 degrees C as the upper figure, and the regulation gives 180 degrees F for polyester and nylon. Work to the lowest figure that applies to the article and the market it is sold into; the WLL 150T polyester round sling page sets out the reconciliation. Chemistry is the other half: nylon is excluded where acids or phenolics are present, and polyester and polypropylene are excluded where caustics are present.

8. Inspection, and What Ends an Article's Service

A cylindrical article is inspected on the same schedule as any other synthetic sling: each day before use, 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. It is removed from service immediately for acid or caustic burns, melting or charring, snags, punctures, tears or cuts, broken or worn stitching and distortion of fittings. Where a repair is allowed at all it is a manufacturer's repair followed by a proof test to twice the rated capacity, with the repair marked to identify who made it and t he certificate retained; load-bearing splices are not repaired and temporary repairs are prohibited. The class page sets out where that leaves this family against the chain family, which can be repaired and re-tested where a synthetic article is retired.

9. What the Enquiry Has to Carry

Line	What to state	What it fixes
1	The item number, or the figure you need in the way you will lift	The row, and the column the figure is read from
2	The diameter the article will be loaded over	The curvature the rating assumes, and whether the figure still applies
3	The ends you want, and what they will be attached to	Whether the article is an eye-ended sling, a closed loop, or a wrapped article with a closure
4	The length, and how the article is to be dressed	The geometry, and whether the tube can be threaded or wrapped at all
5	What the article touches: surface, edges, temperature, chemicals	The fibre, the cover and any protection that travels with the article
6	The identification and the documents you want	The marking, and what is named on the certificate

10. Frequently Asked Questions

Q1: What is a cylindrical sling?

A woven tube with the load-bearing element wound inside it, so the surface that meets the load is a curve rather than an edge, and the core is enclosed.

Q2: How is it different from a round sling?

A round sling is a closed loop of wound yarn with no end; a cylindrical sling is a tube that has to be attached at its ends. Both hide the load-bearing element inside a cover.

Q3: How is it different from a flat sling?

A flat sling is a band with two faces and four edges, built up in plies. A tube has no edge to present and conforms in every direction rather than in the direction it is laid.

Q4: Why does the sheet give an equal rope diameter?

It is the rope diameter the article is equivalent to in service, and it matters when the load is round. The rated load is rated for the diameter of curvature the article is used over.

Q5: Can the inside of the tube be inspected?

No. Once the cover is closed the core cannot be seen, which is why a cut, snag, puncture or tear in the cover is taken seriously rather than treated as cosmetic.

Q6: Does a cylindrical article need edge protection?

It presents no edge of its own, but the load's sharp edges still have to be padded or protected: that rule is about the load, not about the article.

Q7: Which end should I choose?

From the hardware and the hitch. Eyes suit being hooked or shackled at both ends, a closed loop suits wrapping where nothing is hooked, and a buckle suits an article that is wrapped and closed on itself.

Q8: What is the temperature range?

It follows the fibre. For polyester and polyamide the published guides give minus 40 to plus 100 degrees C, the guidance for synthetic slings gives 90 degrees C as the upper figure, and the regulation gives 180 degrees F for polyester and nylon. Work to the lowest figure that applies.

Q9: How often is it inspected?

Each day before use, with periodic inspections at intervals no greater than twelve months and additional inspections where service conditions warrant.

Q10: Can the article be made outside the sheet?

Yes, as an article made to order. Send the figure you need in the way you will lift, the diameter it will be loaded over, the ends and the duty.

Contact

Send the six lines in section 9, and we will come back with the row of the sheet that matches them, or with the questions that are missing. Articles are batch tested, marked per hitch and supplied with a certificate that names the article.