Single Use White Lifting Slings

Dye-free polyester bands from 0.5 לא ל 5 t — the label, לא הצבע, carries the rating

A single use white lifting sling is bought with the load and leaves with it. The white band is the plainest article in the קלע חד כיווני לָנוּעַ: undyed high-tenacity polyester, a formed eye at each end or woven closed into a loop, printed with a working load limit, a length and a batch, checked once at issue and then written off against the job.

White earns its place for reasons that are mostly about the load rather than the sling. An undyed band cannot transfer dye to a white marble slab, a paper reel, a painted panel or a carton of finished goods. It shows contamination — oil, rust bleed, cement dust — exactly where a coloured band would hide it. And there is no dye lot to match, so the second bale matches the first, which matters when the same specification has to be repeated shipment after shipment.

What white cannot do is tell a rigger the capacity from across the yard. There is no white step in the colour sequence, which is why the marking on this page is specified as carefully as the webbing: on a single-trip article the printed figures are the whole record of what the band is.

White is an absence of dye, not a capacity code

Colour coding is a convention for identifying the working load limit at a glance: 1 לא סגול, 2 לא ירוק, 3 לא צהוב, 4 לא אפור, 5 לא אדום, 6 לא חום, 8 t כחול, 10 לא כתום. White sits outside that convention, and buyers sometimes read that as a lower grade. זה לא. It is the colour of undyed polyester, chosen because the band will touch something that must not be marked, or because the consignment has to be built to a repeatable specification with no shade to match.

The trade-off is stated plainly in the table below. On a white band the label is the only statement of capacity, so the label has to be legible in the condition the sling arrives in — after a container, after weather, after being dragged across a deck. That is a specification line on the enquiry, not an afterthought at despatch.

What the absence of colour changes

The band, the eyes and the mark

The band is woven from 100% פוליאסטר בעל עמידות גבוהה, לא צבוע, in a plain flat weave. Polyester is the default because it stretches little under load, keeps its strength when wet and does not absorb water into the weight of the sling; white polypropylene and white nylon are available where a chemical or a weight requirement points that way. Width and ply follow the figure: 25–50 mm single ply covers 0.5–1 t, 50–100 mm two ply covers 2–5 t.

• Ends — flat eye as standard, folded eye or reinforced eye where the hook is large or the eye will be dragged. ה מתלי הרמה חד-פעמיים לולאה אינסופית version has no eye at all: the band is joined to itself, so there is nothing to place on a hook.
• Stitch — the eye is closed with a multi-row lock stitch in high-tenacity thread, with the stitch pattern and the number of rows part of the specification rather than a workshop habit.
• Mark — a sewn white label carrying the WLL for each mode, האורך, הסיבים, the batch and the date, plus the same figures printed directly on the band in black. Black on white is the highest-contrast mark available, which is the practical argument for a white band on a job where the label has to be read once, correctly, by someone in a hurry.

The eye form decides how the band sits on the hook, and the two common one-way forms answer different questions. ה One-Way Webbing Sling is the flat band with an eye at each end; את רצועה חד פעמית מתלה עין אחת is the version made up for a specific hitch, where one end is finished to suit the fitting that will actually be used.

The range, in figures

These are the standard builds. Length is the effective working length, measured eye to eye or loop to loop, and the working load limit is the vertical figure; the arrangement tables below give the rest.

Standard single use white slings — nominal unit weights at mid-length

Unit weights are nominal and move with the weave and the finish; the drawing governs. Wider bands, longer lengths and mixed consignments are quoted against the load rather than picked from a list. For the two sizes bought most often, the figures are set out on the 2000KG single use lifting slings ו 1000KG single use slings דפים.

The arrangement decides the figure

למתלה חגורה אין קיבולת אחת. It has a capacity in the vertical, another in basket, a lower one choked, and the label states each of them. The factors below are the standard mode factors for flat webbing slings: multiply the sling’s own marked WLL by the factor. הזווית היא זווית הרגל לאנך, והתווית על המאמר תמיד עוקפת את הטבלה.

גורם מצב לפי תיאום

Two consequences matter when a white band is specified by the bale. A choked sling is weaker than the same sling used vertically, so a load that has to be choked needs a wider band rather than a longer one. וכשהרגליים מתפשטות היכולת יורדת, which is geometry rather than material: it is answered by a spreader, by a narrower angle, or by a bigger sling, ובשום דבר אחר.

Where a white one-way sling is the right article

The pattern across these jobs is a load that is finished before it is lifted, and a sling that will not come back to a store where it could be re-issued.

• White goods and appliances — painted and powder-coated casings, where a dyed band can leave a mark that will not come off at the packing line.
• נְיָר, board and print — reels and pallets where a wet or dyed band transfers colour into the edge of the stock.
• אֶבֶן, terrazzo and white cement products — slabs and precast units judged on the face, not the arris. The technique is the same one used with a מנשא להרמת זכוכית: רַך, wide contact and an honest edge check before the lift.
• Export pipe and tube — bands fitted before the consignment is packed, כך שהצד המקבל לעולם לא יצטרך לבחור אחד. The pre-slung form in the container photograph above is the usual build.
• Coated coil, aluminium and stainless sheet — where the surface is the product. א קלע רצועות פוליאסטר in undyed white keeps the contact soft and the evidence of any contamination visible.

For a consignment that is wrapped rather than hitched, the restraint is a different article: א רשת להרמת מטען or a lashing, rated for continuous tension rather than for a lift. The two duties do not transfer, and the marking on each says which one it is.

Quantity, אורך וסימון: the three lines on the enquiry

One-way slings are bought by the bale and issued by the piece, so the enquiry is arithmetic before it is engineering. Give the figure per hitch, אורך העבודה האפקטיבי, the number of lifts in the consignment, and how the bands will be identified at the far end.

• Length is EWL — pin to pin, עין בעין, loop to loop — not the cut length of the webbing. State the convention on the order, because the two differ by the length of the eyes.
• Quantity is normally 50 bands to a bale, with cartons for mixed lengths. The total weight is worth calculating at the wider end of the range: a bale of 100 mm bands is a handling exercise before it is a lifting device.
• Marking is the record. Our reference, the batch, the WLL per mode and the date go on the label and on the band; a printed QR or a serial can be added where the consignment has to be reconciled at the destination. קוד HS 630790.

One inspection, and the conditions that end the band

A single-trip sling is inspected once, על הפרק, and that inspection is the only one that can change anything. תראה את המארג היכן שהוא פוגש את העומס, בתפירה או בשרוולים בקצוות, ובתווית. A band that fails is destroyed rather than returned to the rack, because a band that comes back will be issued again with a marking that is no longer true.

• חתכים, תקלות, punctures or tears in the load path — including a notch at an edge that looks superficial.
• הַתָכָה, חריכה או זיגוג, which on polyester means the fibre has been above its working temperature and no longer has the strength the label states.
• Chemical attack: acid or alkali burns, or stiffness and discolouration after contact with a solvent.
• שָׁבוּר, worn or pulled stitching at the eye, or a distorted eye from a hook that was too small.
• A label that cannot be read. On a white band this is the whole record, so an illegible label is the same as no label.

Single use against reusable: the arithmetic

The case for a one-way band is not that it is cheap per band. It is that the costs attached to a returnable band — the return freight, the inspection register, the cleaning, the storage — disappear when the band is left with the load.

What the word changes, ומה זה לא

The engineering does not change: הסיבים, המארג, the factor and the length convention are specified exactly as they are on an article that will be used for years. What changes is the journey, and the fact that there is no second inspection to catch a band that should never have been issued.

נשאל תכופות

Is white a capacity code?

לֹא. The colour sequence runs violet 1 ט, יָרוֹק 2 ט, צָהוֹב 3 ט, אָפוֹר 4 ט, אָדוֹם 5 ט, חוּם 6 ט, כְּחוֹל 8 ט, כָּתוֹם 10 ט, and white is not part of it. On a white band the working load limit is the figure on the label and on the print, ולא שום דבר אחר.

Why specify white rather than a coded colour?

שלוש סיבות: an undyed band cannot transfer colour into a light or absorbent load; it shows contamination instead of hiding it; and there is no dye lot, so repeat bales match. The cost is that nobody can read the capacity from a distance.

Is a single use white sling weaker than a reusable one?

לֹא. It is made to the same 7:1 גוֹרֵם, proof tested and marked the same way. המילה מתארת ​​את המסע, לא הציון.

האם ניתן להשתמש בו בפעם השנייה אם הוא נראה מושלם?

That is the case the discipline exists to prevent. A single lift does not visibly age a webbing band, so a second use is an uninspected article doing a job nobody rated.

What widths and lengths are standard?

25–100 mm width and 0.5–6 m effective working length, in single or two ply. Wider, longer and mixed consignments are quoted against the load and the packing.

Does white not simply look dirty?

It does, and in clean work that is useful: שֶׁמֶן, rust bleed and cement dust appear where they would otherwise be invisible. On grit and concrete a white band looks old sooner, but the conditions that actually retire it are the same as on any other colour.

Can the band carry our own reference or logo?

Yes — printed in black on the band, with the batch and the WLL, and a QR or serial where the consignment has to be reconciled at the far end.

לָבָן, חַד סִטרִי, and endless: which word answers which question?

White is the colour of the fibre, one-way is what happens after the lift, endless is the shape. A white band can be endless or eye-and-eye, and the endless form is on its own page, מתלי הרמה חד-פעמיים לולאה אינסופית.

לאן ללכת הלאה

קטגוריות ודפים קשורים: מתלים לשימוש חד פעמי, Single-Use Lifting Slings for One-Trip Lifts, מנשא חד-כיווני חד פעמי, מנשא הרמה אינסופי, קלע עגול, קלע רשת, רשת הרמת מטען, קרן מפזר הרמה.

מַגָע

Lift Sling Rigging Co., Ltd - טלפון ו-WeChat 18066002268, אֶלֶקטרוֹנִי: lift98@jslift.com, פארק התעשייה ליפוט, העיר טאיז'ו, מחוז ג'יאנגסו, סִין. קוד HS 630790. Send the figure per hitch, האורך האפקטיבי, the packing and the number of lifts, ואנו נאשר את הרוחב, the eye form and the marking before the bands are cut.