Lift sling rigging company produce One-Way Webbing Sling,One Way Endless Webbing Slings,Polyester Single Trip One Way endless webbing slings.
One Way Webbing Sling
اي هڪ طرفي ڳنڍڻ وارو ٻوٽو is a rated polyester sling bought for one journey: it is fitted to the load, travels with it and is written off against that job instead of being returned to a sling store. This page covers the closed لاتعداد لوپ form — the shape specified for pipe, tube and bundling work, because a loop wraps a cylinder instead of hooking it. معياري حد: 1 t کان 12 t, بينڊ جي چوٽي 25 mm تائين 300 ايم ايم, حفاظت جو عنصر 5:1, 6:1 يا 7:1, لوپ ڊگھائي 0.5 m کان 100 م, marked to BS EN 1492-1.
On this page
What “one way” decides, ۽ ڇا نه آهي
The phrase describes the commercial life of the article, not its quality. A one way sling is manufactured, ثبوت ڀريو, colour coded and labelled to the same standard as a sling that will be inspected for years; the difference is that it leaves the store once and does not come back.
Three practical consequences follow. اهو آهي لوڊ سان جاري, so it becomes a line on the packing list rather than an item in a sling register. اهو آهي inspected once, at the point of issue, while a fault can still be replaced from the same consignment. And its print is its whole record: ڪم لوڊ جي حد, ڊگھائي, factor and batch are the only traceability the band will ever carry, so the marking has to survive a lorry, a container and a loading bay — not just the production line.
What it does not change is the engineering. A narrow band or a lower factor chosen because “it is only going one way” is not a saving; اهو لفٽ مان ڪڍيل هڪ اڻ ڄاڻايل مارجن آهي. The figure that applies is the figure printed on the band, for the arrangement actually used. Buyers who need the returnable version of the same loop should read the سنگل پلائي لاتعداد فليٽ سلنگ page instead.
Why a closed loop is the right form for pipe, tube and bundles
An endless webbing sling is a band joined to itself. There is no eye to line up against a machined pipe end, no stitching stack at the bearing point and no shackle, hook or thimble anywhere on the article. On round loads that single property does most of the work.
- It cannot mark a coating. Galvanising, fusion bonded epoxy, three layer PE and paint are all damaged by the same things: a steel edge, a sliding hook and point pressure. A woven polyester face addresses all three. Nothing metallic contacts the pipe, and the load never slides against a fitting.
- The choke holds itself. Passed round the pipe and back through the loop, the band tightens as the load rises. On a cylinder the contact line is a full wrap rather than two point contacts, which is why a loop resists slipping along the axis and does not walk towards the pipe end during a pick.
- The load stays centred. Because the band wraps symmetrically, the pick point sits over the centre of gravity of a joint or bundle rather than off one side — the usual cause of a tilted, eccentric lift and of one sling taking more than its share.
- Pressure is spread by width. Thin wall PVC, PE and stainless tube dent under a narrow band. A 100–200 mm face turns a point load into a low pressure band, which is the single most effective protection on a soft or thin walled pipe.
- Nothing to lose and nothing to thread. A band with end fittings can arrive with the fittings gone. A loop is one piece of webbing: it is either there or it is not, and the person re-slinging at the far end needs no rigging plan to use it.
Where a one way webbing sling is used
The loop is chosen where the load is ويڙهيل rather than hooked, and where the surface matters as much as the tonnage. On a joint lifted on its own, one loop goes round the pipe near each end and the two legs meet at the hook; on a bundle, one loop per pick position is choked round the pack. The applications below are the ones this range is most often bought for, and each one puts a different line on the enquiry.
| لوڊ | Why the loop suits it | What to state on the order |
|---|---|---|
| اسٽيل پائپ ۽ ٽيوب, single joints or bundles | A round section is wrapped, not hooked; the choke grips and the band cannot slide along the pipe. | قطر کان ٻاهر, wall, joint mass or bundle mass, spacing of the two pick positions. |
| پي وي سي ۽ پي پائپ | Thin walls dent under point pressure; a wide soft face spreads the load and leaves no witness mark. | قطر, wall thickness, mass per joint, whether a surface mark is a rejection. |
| Anti-corrosion pipe (3PE, ايف بي اي, tape wrap) | No metal and no sliding contact, so the coating survives the lift and the inspection at destination. | Coating type, whether coated ends are handled, and any requirement for a sleeve. |
| Stainless and copper tube | نرم, expensive and unforgiving of a burr; a polyester face is softer than the load. | ختم ڪر (مل, polished), tube diameter, girth at each pick. |
| Rebar bundles and steel mesh | Cut wire and mesh edges attack a narrow band; a wide loop carries the bundle and resists abrasion. | Bundle mass, number of ties per bundle, whether edge sleeves are needed. |
| Profiles, sections and sheet packs | A sharp arris is a blade against webbing; width and edge protection decide the life of the band. | سيڪشن, اسٽيڪ جي اوچائي, ڪناري جي حالت, band direction. |
| لاگز, timber and timber packs | The arris prints into dressed stock and cuts the weave on a narrow band; a loop spreads the pressure. | Pack mass as it travels, girth at the picks, whether a compression mark matters. |
| Machinery and painted assemblies | ڪنهن به ڌاتوءَ کي ڪنهن به آخر ۾ لوڊ نه ڇڪيندو آهي, جيڪو هڪ رنگ ٿيل يا زمين جي مٿاڇري تي ان کي خريد ڪرڻ جو سبب آهي. | ماس, ڪشش ثقل جو مرڪز, lifting points, surface finish. |
Specifications of the one way webbing sling
The figures below describe the standard build. Width is not a free choice: it follows from the working load limit and from the safety factor, so the same tonnage appears at three widths. لوپ ڊگھائي, پلائي, colour and print are made to the order.
| پيداوار | One way webbing sling, لاتعداد لوپ (گول) فارم; also supplied with formed eyes as a disposable webbing sling one eye |
|---|---|
| فارم | بند ٿيل لوپ, فليٽ اڻيل, band joined to itself — no eye, no end, no metal fitting |
| اڏاوت | Single ply standard; double ply for a higher figure at the same width or a stiffer bearing face |
| فائبر | High tenacity polyester webbing (پي اي ايس); نائلون (پي اي) for shock loads and polypropylene on request |
| Web thickness | 4 mm معيار (3–10 mm across the range) |
| ڪم لوڊ جي حد | 1 t - 12 t single ply; 2 t - 24 ٽي ڊبل پلائي |
| بينڊ ويڪر | 25 مليم - 300 ايم ايم, set by the working load limit and the safety factor |
| حفاظتي عنصر | 5:1 / 6:1 / 7:1, selected at order |
| لوپ ڊگھائي | 0.5 م - 100 m هڪ مسلسل لوپ ۾; minimum length rises with width |
| ڊگھائي | ≤ 7 % ڪم ڪندڙ لوڊ جي حد تي (پاليسٽر) |
| ڪم ڪندڙ حرارت | -40 °C تائين +100 °C مسلسل; polyester melts at about 258 °C, so sparks and hot work need a sleeve |
| رنگ | BS EN 1492-1 capacity colour — 1 t واڱڻائي, 2 t سبز, 3 t پيلو, 4 t ڳاڙهو, 5 t لال, 6 ٽي ناسي, 8 t نيرو, 10 t نارنگي; special colours and printed logos on OEM orders |
| ليبل | ڪم لوڊ جي حد, لوپ ڊگھائي, حفاظت جو عنصر, بيچ نمبر, customer reference; blue or white label |
| معيار | BS EN 1492-1; ASME B30.9 for the 5:1 ٺاھڻ; other market standards to order |
| پيڪنگ | Bundled, cartoned or palletised, labelled per pack and listed on the packing list against the printed reference |
| HS ڪوڊ | 630790 |
Choosing the size: the figure from the pick, the width from the surface
Two decisions are made separately and in this order. جي ڪم لوڊ جي حد comes from what one pick has to carry, divided by the mode factor of the hitch — not from the mass of the load as weighed. جي ويڪر then comes from the surface being wrapped: a coated pipe and a painted machine at the same tonnage do not want the same band.
| Load at one pick | ڪم لوڊ جي حد | ويڪر (5:1 / 7:1) | عام استعمال |
|---|---|---|---|
| تائين 0.8 t | 1 t | 25 / 30 ايم ايم | ننڍي بور ٽيوب, single light sections, tooling |
| 0.8 - 1.6 t | 2 t | 50 / 60 ايم ايم | Pipe to 6″ in single joints, small bundles |
| 1.6 - 2.4 t | 3 t | 75 / 90 ايم ايم | Pipe to 10″, rebar bundles, ڪاٺ جا پيڪ |
| 2.4 - 3.2 t | 4 t | 100 / 120 ايم ايم | Coated pipe 12–16″, شيٽ پيڪ |
| 3.2 - 4.0 t | 5 t | 125 / 150 ايم ايم | Heavy wall pipe, مشينري, پٿر |
| 4.0 - 4.8 t | 6 t | 150 / 180 ايم ايم | Pipe bundles, ساخت جا حصا |
| 4.8 - 6.4 t | 8 t | 200 / 240 ايم ايم | Large bundles, ڪنول, log packs |
| 6.4 - 8.0 t | 10 t | 250 / 300 ايم ايم | Export pipe bundles, heavy fabricated items |
| 8.0 - 9.6 t | 12 t | 300 / 300 ايم ايم | Maximum single ply; go to double ply above this |
ڊگھائي: the two conventions, and why the mistake is expensive here
لوپ جي وچ ۾ ماپڻ لاءِ ڪا به پڇاڙي ناهي, so the trade quotes the same article two ways. The two figures differ by about a factor of two, and on a one trip band the error surfaces at the far end — in front of a customer, تبديل ڪرڻ لاءِ ٻئي بينڊ سان.
| توهان لکو | ان جو مطلب آهي | جڏهن ان کي استعمال ڪرڻ لاء |
|---|---|---|
| لوپ جي فريم 4.0 م | هڪ مڪمل موڙ تي لوڊ گول, بند ٿيل لوپ جي گول ماپ | بئنڊ کي حڪم ڏنو ويو آهي ته هڪ ڄاڻايل گرٿ لپي |
| بينڊ ڊگھائي 2.0 م, فليٽ رکيل | The webbing cut length before joining — half the circumference | بينڊ قيمت آهي ۽ ميٽر طرفان ڪٽي وئي آهي |
| چنبڙي تي چڙهڻ 1.6 م, ٻه چونڊون | خود لوڊ جو طول و عرض, plus the number of bands | Safest form on a first order: ان کي ڪا به ڪنوينشن جي ضرورت ناهي |
What the same loop carries in each hitch
The figure on the label describes the vertical arrangement only. All three hitches are rigged without any change to the article, which is why the arrangement has to be stated before the width is fixed.
| بندوبست | فڪر | اي 5 t لوپ ڏئي ٿو | جتي اهو استعمال ڪيو ويندو آهي |
|---|---|---|---|
| Vertical — loop hangs, هڪ پاسي لوڊ | 1.0 | 5.0 t | Single point pick, hook through the loop |
| Choked — round the load and back through itself | 0.8 | 4.0 t | پائپ, ٽيوب, قطب, ڊرم, بنڊل |
| ٽوڪري, ٽنگون 0-45° | 2.0 | 10.0 t | Under a bundle with both legs carrying |
| ٽوڪري, ٽنگون 45-60° | 1.4 | 7.0 t | Wide bundles, short sling legs |
چوڪ اهو بندوبست آهي جنهن لاءِ لوپ خريد ڪيو ويندو آهي, ۽ اهو پڻ آهي جيڪو خرچ ڪري ٿو 20 % of the printed figure. اي 4.5 t پائپ بنڊل تي ڇڪيل a 5 t لوپ هڪ اوور لوڊ آهي, not a margin — the answer is the next width up, not a longer band.
Coating and surface compatibility
| مٿاڇري | Risk in the lift | Sling measure |
|---|---|---|
| Hot dip galvanised pipe | Zinc layer rubbed through by sliding hardware; white rust at a scored line | لاتعداد لوپ, ڪو سامان ناهي, 100 mm band or wider, dry and grit free |
| 3PE / FBE anti-corrosion pipe | Point pressure and edge cuts at the coating; repairs are costly at destination | Wide soft face, padded protector at the contact, choke without a wire rope stinger |
| پي وي سي ۽ پي پائپ | Denting and ovality under a narrow band, especially in warm weather | 150–200 mm band, ٻه چونڊون, basket rather than a single choke on long joints |
| Stainless tube | Iron contamination and scratching from contact with steel fittings | Dedicated synthetic sling, ڪوبه ڌاتو رابطو, clean storage before issue |
| Copper tube | Brinelling and burrs from hard contact | Loop only, band width matched to tube diameter |
| Painted or machined assemblies | Print-through and paint damage at the sling contact | Soft loop, edge sleeves, protector where the band crosses an arris |
نشان لڳائڻ, label and what it has to survive
On a single trip article the print is the record, so the marking is a specification line rather than a detail. Four things belong on the label: the working load limit, the loop length with its convention, حفاظت جو عنصر, and the reference the despatch actually uses — a batch, هڪ پيڪ نمبر, هڪ آرڊر نمبر يا توهان جو پنهنجو حصو نمبر. That reference is what ties the band on a quay to the line on a packing list in an office.
- سفر بعد جائز, پيداوار کان پوء نه. Small, low contrast print on a face that enters the choke will not be read at the far end.
- ٻئي چينل طور رنگ. ھڪڙو رنگ في پيڪ جي قسم, per customer or per tonnage lets a container of identical bands be sorted at a glance.
- Printed to your string. The label can carry your reference in the exact case and format you send, ۽ بئنڊ هڪ ڪرٽ اندر ڀريل هوندا, هڪ سٽيلج تي strapped يا هڪ بنڊل ۾ ٽيپ, ليبل ٿيل في پيڪ.
The single inspection, and what it looks at
A one trip band is checked once, at issue, while a fault can still be replaced from the same consignment. Look at four things, هن ترتيب ۾: بناوت جتي اهو لوڊ پورو ڪري (ڪٽ, ڇڪڻ, هڪ چمڪندڙ يا چمڪدار چهرو), جوڙ جتي لوپ بند ٿئي ٿو, the label — an unreadable figure cannot be matched to the pack it was cut for — and what the band has been lying in. گرٽ, swarf, تيل ۽ بيٺل پاڻي رابطي ۾ سفر ڪري ٿو, and a clean band is the cheapest protection available.
Do
- State the hitch, the girth and the mass per pick
- Add edge protection at a cut sheet, mesh or arris
- Keep the band dry, clean and off the ground before issue
- Retire the band at the destination, not back to a rack
Do not
- Shorten a sling with a knot or join two by knotting
- Repair webbing by stitching, ويلڊنگ يا گرم ڪرڻ
- Drag a loop over a cut edge or across the ground
- Re-issue a band that has done a journey
Protect the band from sharp edges, گرم مٿاڇري ۽ ويلڊنگ اسپيٽر کي آستين سان يا هڪ پيڊ محافظ سان. مٿي 100 °C, or where sparks are present, polyester is the wrong fibre and an لامحدود گول ٽنگ with a heat resistant cover is the article to discuss.
One way or returnable: the arithmetic
The commercial case is simple and it is arithmetic, not preference. A one way band costs less per unit than a returnable sling and carries no return freight, ڪوبه انسپيڪشن رجسٽر ناهي, no repair and no loss write-off — but it has to be counted correctly, because nothing comes back to cover a shortfall. پيڪ مان ڳڻيو, ٽينج مان نه: ٻه چونڊون في پيڪ ٻه بينڊ آهن, a four point lift is four, ninety packs at two picks is 180 بينڊ. Add two to five per cent for the band cut while the pack is made up, تنهنڪري هڪ شارٽ فال ڊاک تي دير جي بدران آرڊر تي هڪ قطار بڻجي ويندو آهي.
Where the same slings are used week after week in one yard, a returnable article inspected between lifts is the cheaper order over a year. Where the sling leaves with the load — export packing, one off shipments, work that ends on a customer’s site, or a coated pipe consignment that is re-slung at the far end — the one way loop is the right purchase. Where the whole consignment travels as a netted unit instead of being slung joint by joint, هڪ سامان کڻڻ جا نيٽ ورڪ is the article to price against it. The form with eyes at both ends, for loads that are hooked rather than wrapped, تي آهي disposable one way sling صفحو; the wider family is on the اڪيلو استعمال slings ۽ single use lifting slings endless loop صفحا.
What to send with the enquiry
Six lines are enough to quote a made to order band, and they remove every ambiguity that shows up later at the load:
- The load — pipe diameter and wall, bundle mass, or the finished item.
- The pick positions — how many, and how far apart.
- The arrangement — vertical, ڇڪيل يا ٽوڪري, and the angle if basket.
- The girth at each pick, or the loop length with its convention named.
- The safety factor your market works to, and the standard to mark to.
- The reference to print, and the quantity per pack.
Request a quotation for one way webbing slings
لوڊ موڪليو, چونڊ جي پوزيشن, the girth and the factor. اسان چوٽي سان واپس اچون ٿا, لوپ جي ڊيگهه, the finished weight and the marking — on a drawing, بينڊ کٽڻ کان اڳ.
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Lifute صنعتي پارڪ, Taizhou شهر, جيانگسو صوبي, China · HS code 630790
اڪثر پڇيا ويا سوال
What is a one way webbing sling?
A rated polyester webbing sling supplied for a single journey. اهو لوڊ سان سفر ڪري ٿو, is inspected once at the point of issue and is not recovered or re-issued. The endless form is a closed loop of flat woven polyester with no eye and no metal fitting, which is why it is the form chosen for pipe, tube and bundles.
Is a one way sling weaker than a reusable one?
نه. فائبر, بناوت, ويڪر, حفاظت جو عنصر, working load limit and marking are specified exactly as for a returnable sling. لفظ سفر کي بيان ڪري ٿو, not the grade, so a lower factor or a narrower band is not a saving on a single trip article.
Will a webbing sling scratch galvanised or anti-corrosion pipe?
The band is synthetic fibre and no shackle, hook or thimble touches the load when an endless loop is used, so there is nothing to cut or gouge a zinc, epoxy or polyethylene coating. ويڪر تحفظ جي ماپ آهي: بينڊ وسيع, the lower the pressure at the contact.
How is the length of an endless webbing sling measured?
Two conventions are used and they differ by about a factor of two: بند ٿيل لوپ جي فريم, ۽ بينڊ جي ڊيگهه شامل ٿيڻ کان اڳ فليٽ رکيل آهي. Name the convention with the figure, or give the girth of the pipe or bundle the loop must go round.
Can the same loop be used in a choker hitch?
ها, and a closed loop is the natural form for a choke on pipe, tube and bundles. ڇڪيل شڪل آهي 0.8 of the vertical working load limit, تنهنڪري هڪ 5 t loop chokes 4 t. Select the width for the arrangement actually used.
ڪهڙو حفاظتي عنصر مون کي حڪم ڪرڻ گهرجي, 5:1, 6:1 يا 7:1?
7:1 is the usual European figure for flat woven webbing slings to BS EN 1492-1, 5:1 is the customary North American figure under ASME B30.9, ۽ 6:1 انهن جي وچ ۾ ويٺو. هڪ مختلف عنصر تي ساڳيو tonnage هڪ مختلف ويڪر سان هڪ مختلف مضمون آهي, تنهنڪري عنصر انڪوائري تي تعلق رکي ٿو.
ڇا بينڊ اسان جي پنهنجي حوالي سان ڇپائي سگهجي ٿو?
ها. ڪم لوڊ جي حد, لوپ ڊگھائي, حفاظت جو عنصر, batch and your own pack, order or part number can be printed as produced, in the exact string you send, so a band at the far end can be tied back to a line on the packing list.