Nylon Woven Flat Sling

Nylon Woven Flat Sling — polyamide webbing to EN 1492-1, 1 t to 10 t, single or double ply, any length from 1 m to 12 m

What is on this page. This page covers the nylon (polyamide) flat woven webbing sling as a material choice: what the product is and what it is not, the band range, what polyamide does that polyester and polypropylene do not, which duty points to nylon, how a nylon band behaves wet, hot and in contact with chemicals, which form to order, how to inspect and retire it, and how to order it.

• What the product is, and the terms that get confused with it — section 1

• The nylon band range and the nylon specification sheet — section 2

• Three fibres side by side, property by property — section 3

• Choosing the fibre and the band from the duty in front of you — section 4

• Nylon under wet, hot and chemically loaded conditions — section 5

• Chemical resistance in detail, by class of chemical — section 6

• Endless or eye-and-eye — section 7

• Inspection and retirement criteria for a nylon band — section 8

• Standards, marking and duties a nylon sling is not rated for — section 9

• Ordering, packaging, HS code and export — section 10

1. What Is a Nylon Woven Flat Sling?

A nylon woven flat sling is a flat woven webbing sling woven from polyamide and sewn into either an endless loop or an eye-and-eye form. EN 1492-1 — the European standard for these products — covers flat woven webbing slings in Type A (endless), Type B, Type C and Type D (eye-and-eye, with or without fittings), made of polyamide, polyester or polypropylene, across webbing widths of 25 mm to 450 mm, and it sets out the requirements for design, testing and marking. It is the same standard the rest of our flat woven range is built to, with a safety factor of 7:1.

Nylon and polyamide mean the same fibre on this page. Polyamide is the fibre family; nylon is the trade name it is sold under, and PA is the abbreviation used on labels and in standards. The colour that identifies it is green on the label — the webbing colour is a separate signal, and section 2 explains the difference.

What it is not. Three products sit close to each other in the market and are routinely quoted as if they were the same thing. They are not, and the difference decides whether the sling you are offered can do the job:

• Nylon woven flat sling — flat woven polyamide webbing, sewn, Type A to D under EN 1492-1. This page.

• Nylon round sling — a different product: a load-bearing core of parallel yarn inside a woven tubular cover, covered by EN 1492-2. Different standard, different construction, and not interchangeable with a flat woven sling.

• Nylon webbing with fittings — still a flat woven webbing sling under EN 1492-1, but Type D: eyes with metal end fittings, or a sling built as an assembly with a master link and hooks.

Terminology: what the term in the quotation actually means

2. The Nylon Band Range, 1 t to 10 t

Nylon bands are made in the same band structure as the rest of the flat woven range, because the band is set by the standard and not by the fibre. The webbing colour is the working load limit code for a straight lift, the black transverse stripes repeat that capacity one stripe per tonne, and the width grows with the band. What changes with the fibre is not the colour code but the label: the label colour states the material, and a polyamide band carries a green label at every band from 1 t to 10 t.

Two colour signals therefore travel on the same sling, and it is worth separating them once:

Two colours, two different messages

Read together, a 3 t nylon band is therefore yellow webbing with three black stripes and a green label. Any two of those three marks agreeing and the third disagreeing is a reason to take the sling out of service, not to guess.

The table below is the nylon band specification as we build it. Capacity figures for hitches other than a straight lift are calculated with the standard mode factors, which are explained in section 4.

Nylon woven flat sling: band specification, 1 t to 10 t

How to read the nylon band table.

• The width column is a construction figure, not a rating. A duplex band reaches the same band on a narrower webbing, so confirm width against ply on the quotation rather than assuming a width from this table. What width really decides is the bearing surface — whether the band marks, scuffs or crushes a finished load.

• The breaking load is a destruction figure. 7 t at the 1 t band and 70 t at the 10 t band are minimum breaking loads at the EN 1492-1 factor of 7:1. They are never working capacities, and they are not a margin to be spent.

• Above 10 t. Heavier flat woven webbing slings are made to order, and for very heavy lifts we would normally quote a different product — a round sling, a wire rope sling or a lifting beam. Tell us the load and we will say which one the number points to.

• Order by band, fibre and length together. A band on its own does not describe a deliverable product: 2 t tells you the colour and the rating, but the fibre, the ply and the length still have to be specified, and on a nylon band the fibre also decides what the sling must be kept away from.

3. Three Fibres Side by Side: What Polyamide Does That the Others Do Not

EN 1492-1 covers three man-made fibres, and the choice between them is decided by the environment rather than by capacity. The table below puts published fibre data for the three side by side. Where a figure is a range rather than a single number, that is because it is a range in the fibre data itself.

Polyamide, polyester and polypropylene compared, property by property

Read the elongation row honestly. A nylon band stretches roughly twice as far as a polyester band at the same working load limit. That is not advertising: it means a nylon sling absorbs shock better, settles further before it takes the load, needs more headroom in the rig, and can let a load shift if the pick is not symmetric. Where the lift is delicate, low-stretch polyester is usually the better answer; where the pick is dynamic, nylon's stretch is doing useful work. We do not publish a single headline elongation number for a nylon band — measured elongation is available against your specification on request.

4. Choosing the Fibre and the Band from the Duty in Front of You

Two decisions are being made at once when a flat woven sling is specified: which fibre, which is decided by the environment, and which band, which is decided by the load and the hitch. The table below is organised the way enquiries actually arrive — by the process, not by the chemistry.

Fibre selection by the duty in front of you

Four rules that decide the band, once the fibre is settled.

• Choking costs you 20% of the rating. A choked lift uses a mode factor of 0.8, so a 3 t band gives 2.4 t choked — that is 20% below its 3 t straight-lift figure, not roughly the same. Choose the band on the choked figure when the load has to be choked.

• An assembly is never the sum of its slings. Two legs within 45 degrees of vertical are rated at 1.4 times the single rating — a pair of 3 t slings gives 4.2 t, which is 40% more than one sling, not 100% more. A four-leg assembly uses a factor of 2.1, because a four-leg assembly is rated as if only three legs carry the load.

• An off-centre load puts more on one sling. Two slings share equally only when the centre of gravity sits exactly halfway between the pick points. Move it a third of the way towards one pick point and that sling carries 67% of the load.

• What the load will tolerate can overrule the capacity. On a finished, painted or easily marked load, the width of the band is the binding constraint rather than its rating, and the answer is more pick points or a sleeve, not a heavier band.

5. Nylon Under Load: Wet, Hot and Chemically Loaded Conditions

This is the section that decides whether a nylon sling is right for a particular job, because polyamide's weaknesses are the ordinary conditions of industrial work: water, heat, sunlight and splashes. Each one has a practical answer, and the answer is rarely a heavier band.

Nylon in service: what the condition does, and what to do about it

6. Chemical Resistance in Detail, by Class of Chemical

Chemical resistance is quoted three different ways in this industry, and only one of them is useful: a named fibre, against a named chemical, at a named concentration and temperature. The grid below is by class of chemical, which is enough to choose a fibre and not enough to sign off a lift — for that, send us the tank chemistry.

Chemical class against fibre: the working grid

7. Endless or Eye-and-Eye: Which Form to Order

The fibre decides what the sling can be used near; the form decides how it is used. Both forms are flat woven slings under EN 1492-1, and both are made in nylon.

Endless (Type A) against eye-and-eye (Type B, C or D)

A note on the word endless. An endless sling is closed by a stitched lap splice, so it is a sewn product rather than a jointless one, and the splice is a real joint that has to be inspected. What the form genuinely gives you is a long overlap instead of a short reinforced eye, a loop that can be rotated, a usable bearing area all the way round, and one sling that covers straight, choked and basket hitches.

8. Inspection and Retirement Criteria for a Nylon Band

Every sling should be inspected before every use, with a documented periodic inspection on top of that. On a nylon band there are two extra things to look for that do not apply to the other two fibres: chemical damage from the acid side of the plant and UV degradation, which shows up as a dry, faded, brittle feel rather than as a cut. The table below is the withdrawal list we work to.

Nylon flat woven sling: what to check, and when to withdraw

Care rules for a nylon flat woven sling.

• Never use a polyamide webbing sling below −40 °C or above +100 °C.

• Rotate the loop between lifts on an endless sling, and alternate the eyes on an eye-and-eye sling. It is the single habit that gets the most service life out of the product.

• Do not drag a sling on the floor or across abrasive surfaces, and never pull a sling out from under a load resting on it — lift the load clear first.

• Do not twist, knot, shorten or lengthen a sling, and never repair one.

• Fit edge protection wherever the band crosses a sharp or finished edge, at any load.

• Wash with mild soap and water and dry naturally. Do not machine wash nylon — it damages the surface yarns and gives an unpredictable loss of strength — and do not machine dry or heat dry.

• Wash off cement, lime and mortar slurry after contact: the chemistry is harmless to the fibre, the dried abrasive is not.

• Store dry and dark, off the floor, away from oil, chemicals and sharp edges. Nylon absorbs moisture, so a nylon sling goes back on the rack dry.

• Keep the sling clear of acid, bleach, phenolic compounds and solvent. A nylon sling is not the sling to leave hanging beside a pickling tank.

• In an assembly, inspect every sling in the set and keep the set together.

• Cut a retired sling through before disposal so that it cannot be put back into service by mistake.

9. Standards, Marking and Duties a Nylon Sling Is Not Rated For

What the product is built to. Nylon flat woven slings are made to EN 1492-1, Textile slings — Safety — Flat woven webbing slings made of man-made fibres for general purpose use. That standard covers single-leg, two-leg, three-leg, four-leg and endless sewn flat woven webbing slings, with or without fittings, made of polyamide, polyester or polypropylene, across webbing widths of 25 mm to 450 mm, and it sets out the requirements for design, testing and marking.

Why the standard reference on the label matters as much as the number beside it. A “1 t” marking means a 7 t minimum breaking load only if the sling was built to EN 1492-1 at its 7:1 factor. Under ASME B30.9, where the design factor for these slings is commonly 5:1, the same 1 t marking corresponds to 5 t. Under AS 1353 at 8:1 it corresponds to 8 t. Three slings, all marked 1 t, built to materially different margins — which is why our quotation asks for the destination market and the standard you need, not just the band.

What every nylon sling has to carry. The marking is part of the product, not a finishing touch. The visible working load limit code is the webbing colour plus the black stripe count; the label carries the working load limit for the straight lift, the fibre — green for polyamide —, the standard reference, the manufacturer, the length and a traceability code.

• The colour and the stripe count are mandatory under EN 1492-1 for the band, and they say nothing about the fibre. A nylon sling supplied in a colour that does not match its rating, or described as available in any colour, is not being marked to the standard.

• The label is the second half of the same message. Colour tells you the band; the label tells you the fibre and the traceability. If the label is missing or illegible, the sling is out of service regardless of the condition of the webbing.

• The traceability code is what makes a batch certificate possible. Keep it: it is what links a sling in service back to the batch it was tested with.

Duties a nylon flat woven sling is not rated for, at any band.

• Lifting or suspending a person.

• Towing, recovery or vehicle pulling — the rating is a lifting rating and tow loads are shock loads.

• Staying in place permanently as a tie, guy or restraint.

• Being knotted or twisted to shorten it.

• Lifting over an unprotected sharp edge without a sleeve.

• Contact with acids, bleaching agents or phenolic compounds — this is the polyamide limitation, and it is the one that catches buyers out when a nylon sling is bought for a pickling shop.

• Working on or near live electrical conductors.

• Service above +100 °C.

10. Ordering, Packaging, HS Code and Export

Almost every nylon woven flat sling we ship is made to order, so the fastest route to a firm price is a complete enquiry rather than a band number. The eight points below are what we need.

• The duty and the chemistry — what the sling will be near: cement, lime, caustic wash, acid, solvent, or nothing in particular. This is what fixes the fibre, and on this page it is the first question rather than the last.

• Wet or dry — whether the sling will be working wet. A wet nylon sling carries up to 15% less than its dry rating, so a permanently wet duty is specified on the wet figure from the start.

• The band and the ply, or the load and the hitch — we will do the arithmetic with you if you send the load, the hitch and the pick points.

• The form — endless (Type A) or eye-and-eye (Type B, C or D), and the length basis: a loop circumference for an endless sling, bearing point to bearing point for an eye-and-eye sling. These are different numbers and confusing them is the most common reason a sling arrives and does not fit.

• Eye protection and edge protection — whether any edge the band crosses is sharp or finished, so a sleeve, a corner or a reinforced eye is quoted in the price rather than added later.

• Quantity, destination market and standard — the quantity, the market the sling is going to, and the standard the buyer's specification names, so the safety factor behind the marking is the one the market expects.

• Marking, labels and branding — customer colour, logo, part numbers and label language, all added alongside the mandatory items and never in place of them.

• Certificates and inspection — whether a batch test certificate, third-party witnessing or a particular certificate format is required. Ask at enquiry stage rather than after production.

The rest of the order, as standard.

• Ply — single ply as standard, double ply on request, with the band and the ply ordered together rather than trying to uprate a sling on site.

• Width — 25 mm to 250 mm across this range, sized on the band, the ply and the bearing surface the load will tolerate. EN 1492-1 covers up to 450 mm.

• Length — made to order, 1 m to 12 m as standard and longer on request.

• Colour and marking — the EN 1492-1 band colour and the black stripe count are mandatory; a customer colour or logo is added alongside them.

• Packaging — cartons, woven bags or pallets, with customer labels and shipping marks on request.

• HS code — 630790, other made-up textile articles. If your customs broker wants a different subheading declared for your destination, tell us and we will declare the shipment accordingly.

• Trade terms — EXW, FOB or CIF, with other terms on request.

• Samples — available for evaluation against a stated specification.

• Lead time and minimum order — confirmed per order, because both depend on the band, the length and the quantity. Tell us the date you need it and we will quote against that date rather than in the abstract.

• OEM and private label — available, with the mandatory marking items retained.

Three things worth specifying even if you have bought webbing slings before. The fibre, because it decides what the sling must be kept away from. The wet or dry duty, because a wet nylon sling is an 85% sling and the wet figure has to be in the calculation rather than discovered on site. And the standard the destination market expects, because the safety factor behind any rating is set by the standard, not by the number printed on the band.

11. Frequently Asked Questions

Contact us — nylon woven flat slings direct from the manufacturer

Tell us the load, the rigging and the chemistry the sling will meet, and we will come back with the specification and price for your nylon woven flat sling — band, fibre, ply, width, length and marking all on one sheet. Volume discounts apply. We build to order in single or double ply, in polyamide, polyester or polypropylene, in any length from 1 m to 12 m and beyond, with the EN 1492-1 colour code, one black capacity stripe per tonne and the green polyamide label as standard. Matching sets for two-leg and four-leg assemblies are supplied on request.

• Contact: Wang Lili

• Phone: 18066002268

• E-mail: 702461526@qq.com

• Address: Lifute Industrial Park, Taizhou City, Jiangsu Province, China

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