One Way Single Ply Endless Polyester Flat Lifting Webbing Sling

A one way single ply endless polyester flat lifting webbing sling is a closed loop of flat woven polyester webbing – one ply, joined to itself, with no eye, no end and no fitting anywhere on the article. It is bought for one journey and supplied with the load rather than drawn from a sling store. Standard range: 1 לא ל 12 ט working load limit on 4 מ"מ חגורה, רוחבים 25 מ"מ ל 300 מ"מ at a 5:1, 6:1 אוֹ 7:1 גוֹרֵם, loop lengths 0.5 מ ל 100 מ, colour coded to BS EN 1492-1 and supplied with a blue label stating the working load limit, האורך, the factor and the batch.

Why a Loop Suits a One-Trip Band

The two halves of this name answer two different questions. דרך אחת is commercial: the band travels with the pack, is used once, and is not recovered or re-issued. אֵין סוֹף is structural: the band is joined to itself, so there is nothing to thread and nothing to align.

Put together, they answer what actually goes wrong at the far end of a consignment: the person re-slinging the load has no rigging plan, no sling store and no second choice, and a loop asks nothing of them.

• Nothing to align. An eye has to meet a hook of the right size the right way round. A loop is dropped over the load or passed round it, and the pick works whichever way it lands.
• Nothing to bruise a finish. No stitching stack at the bearing point, no thimble, no shackle in contact with the load. On coated pipe, anodised section or polished sheet that is the whole protection.
• Nothing to lose. A band with fittings can arrive with the fittings gone. A loop is one piece of webbing and it is either there or it is not.
• Nothing to get wrong on length. The one exception on this list, and it is the one that matters most – see the section on length below, because a loop is quoted two ways and they differ by nearly a factor of two.

מפרטים

גודל: Width Follows the Figure and the Factor

Width is not a free choice: it follows from the working load limit and from the factor, which is why the same tonnage appears three times below with three widths. א 7:1 band is wider and heavier than a 5:1 band of the same figure – that is the cost of the extra factor, not a different grade of webbing.

The same width ladder, in the looped-end form, is published on the מתלים להרמה לשימוש חד פעמי עַמוּד – useful when a consignment needs eyes at the top and a loop at the bottom, which is two articles rather than one.

Maximum length is 100 m in one continuous loop. Longer lengths, intermediate widths, extra-wide loops and special colours are made to order. Nothing in the table is a stock size: the figure, הגורם, the width and the length together describe a band made to your line.

Two readings catch buyers out. ה minimum length follows the width, לא הטונאז': 25 מ"מ לוקח 0.5 מ, 50 ו 75 מ"מ קח 1.0 מ, 100 אֶל 150 מ"מ קח 1.5 מ ו 200 מ"מ ומעלה לקחת 2.0 מ. רצון ברצועה רחבה למשטח רך פירושו לקבל מינימום ארוך יותר, שבמארז קצר הוא הקו שמחליט על הסדר. ואת weight column is a handling figure: בראש הסולם מאה מטר של 300 mm band is over a quarter of a tonne, והלהקות נוסעות כמטען לפני שהן מרימות משהו.

מֶשֶׁך: the Two Conventions, and Why It Matters More Here

A loop has no ends to measure between, so this trade quotes the same article two ways: את הֶקֵף of the loop, ואת length of the band laid flat. For the same sling the two figures differ by about a factor of two. Both are legitimate; only one of them is the figure you meant.

On a reusable sling the mistake shows up at the next lift and is corrected from the store. On a one-way band it shows up at the far end, in front of a customer, with no second band to swap in – which is why this is the single line worth getting right on the enquiry. State the convention with the figure, or state the use instead (the girth of the article the loop must go round), and the ambiguity disappears before the band is cut.

The Three Hitches, and What Each One Carries

The same loop works in three arrangements, and the figure on the label only describes the first of them. This is the most common error on an endless band, because all three are rigged without any change to the article.

The choke is the arrangement a loop is bought for – it is what grips a pipe, a pole or a drum – and it is also the one that costs 20 % of the figure. אז א 4.5 t pipe bundle choked on a 5 t loop is an overload, not a margin, and the answer is the next width up rather than a longer band. Where the loop is used as a basket under a bundle, both sides carry and the figure doubles; where it is used vertically, the label figure applies as printed.

One Way Is a Commercial Life, Not a Lower Grade

המילה מתארת ​​את המסע, and nothing else: הסיבים, לֶאֱרוֹג, רוֹחַב, גוֹרֵם, working load limit and marking are specified exactly as for a band used for years, and buying a narrower band or a lower factor because it is only going one way is not a saving – זה מרווח לא מדורג שהוצא מהמעלית. What does change is the record. On a reusable sling the inspection history is the evidence; on a single-trip band there is no history after the lift, כָּך the print on the band and the packing list carry the whole traceability. The returnable version of the same loop, inspected between lifts and drawn from a store, הוא ה single ply endless flat sling.

• Marking is part of the specification, not the paperwork. מגבלת עומס עבודה, מֶשֶׁך, גוֹרֵם, וההפניה שהמשלוח משתמש בה בפועל – מספר חבילה, an order number, your own part number. That reference is what ties a band on a quay to a line on a packing list in an office.
• קריא לאחר המסע, לא לאחר הייצור. הדמויות צריכות לשרוד משאית, מכולה ומפרץ טעינה. הדפס קטן, low-contrast, or on a face that enters the choke is print that will not be read.
• צבע כערוץ שני. צבע אחד לכל סוג חבילה, לכל לקוח או לכל טונה הופכת מיכל של להקות זהות למשהו שניתן למיין במבט אחד, and on a made-to-order band it costs nothing.

Counting: One Band per Pick Point, per Pack

One-trip bands are bought in the same arithmetic as the packing, and it is done once because nothing comes back. ספור מהחבילה, לא מהטונה: two picks per pack is two bands, הרמה של ארבע נקודות היא ארבע, and ninety packs at two picks is 180 להקות. הוסף את קצבת הטיפול בכוונה – two to five per cent covers the band cut on a sheet edge while the pack is made up – so a shortfall becomes a line on the order instead of a delay at the dock. Where the bands are packed inside a crate, מחוברים למחרוזת או מודבקים לצרור, the sling becomes a line on the bill of materials: מספר חלק, a loop length, a colour and a print that does not change between shipments.

Where a One-Trip Loop Is the Right Order

The Single Inspection, and What It Looks At

A one-trip band has one inspection in its life and it happens before the load, כאשר עדיין ניתן להחליף תקלה מאותו משלוח. בוחנים ארבעה דברים, לפי הסדר הזה: the weave where it meets the load (חתכים, שְׁחִיקָה, a glazed or pinched face), the join where the loop closes, the label – because an unreadable figure cannot be matched to the pack it was cut for – and what the band has been lying in. חָצָץ, ספייס, שמן ומים עומדים עוברים לתוך המגע, and a clean band is the cheapest protection on the list.

הגן עליו מפני קצוות חדים, hot surfaces and welding spatter with a sleeve or a padded protector, never shorten a sling with a knot, never join two slings by knotting them, and never repair webbing by stitching, welding or heating. At the destination the band is disposed of, לא מאוחסנים: a one-trip band that comes home to a rack gets issued again, and its marking then states something that is no longer true.

שאלות נפוצות

What is a one way single ply endless polyester webbing sling?

A closed loop of flat woven polyester webbing, one ply thick, joined to itself with no eye, no end and no fitting. It is bought for one journey, supplied with the load and not recovered. The standard range runs 1 לא ל 12 t on 4 מ"מ חגורה, 25 מ"מ ל 300 מ"מ רוחב, with loop lengths from 0.5 מ ל 100 מ.

How is the length of an endless sling loop measured?

Two ways, and they differ by about a factor of two: the circumference of the closed loop, and the length of the band laid flat before joining. תן שם למוסכמה, or name the girth of the load instead – that is the form that leaves nothing to interpret.

Is a one-trip endless band weaker than a reusable one?

לֹא. Width follows the working load limit and the factor in exactly the same way, והדמויות המודפסות על הרצועה הן הדמויות החלות על המעלית. What changes is that the band is not recovered, so the print and the packing list carry the whole record of it.

Which safety factor should I order – 5:1, 6:1 אוֹ 7:1?

7:1 is the design factor used for general-purpose flat woven webbing slings under European practice and is the usual choice with colour coded bands under BS EN 1492-1. 5:1 is the customary North American figure for synthetic webbing slings and 6:1 יושב ביניהם. אותו טונה בגורם אחר הוא פריט אחר עם רוחב שונה, אז הגורם צריך להיות בחקירה.

Can an endless webbing loop be used in a choker hitch?

כֵּן, and it is what a loop is best at – it is how a pipe, a pole or a drum is gripped. הדמות החנוקה היא 0.8 of the vertical figure, אז א 5 t loop chokes 4 ט. Select the width for the arrangement you will really use, not for the vertical figure on the label.

Single ply or double ply endless sling?

Single ply is the lighter, more flexible and more economical build, and it is the right answer for most lifts up to 12 t and for anything that has to be threaded through a tight space or wrapped round a small diameter. Double ply buys a higher figure at the same width, or a stiffer, wider bearing face – at more weight and more cost per band.

Can the band be printed with our own reference or packed with our product?

Yes to both, and they are usually ordered together. מגבלת עומס העבודה, the loop length and your own pack, order or part number can be printed as a production instruction, in the exact string and case you send; the bands can be packed inside a crate, מחוברים למחרוזת או מודבקים לצרור, labelled per pack and listed on the packing list with the reference that matches the print.

בקש הצעת מחיר

Send the pack and its travelling mass, the pick points and their spacing, את ההסדר, the girth at each pick, the safety factor your market works to, and the reference to print. We come back with the width, the loop length, the finished weight and the marking – on a drawing, before the band is cut.

Send your loop specification for a quotation

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מוצרים קשורים

• מנשא שטוח ללא סופי שכבתית אחת – the returnable version of the same loop
• Single use lifting sling, לולאה אינסופית – the single-trip range
• מתלים להרמה לשימוש חד פעמי – the category, and the other three end forms
• Disposable webbing sling one eye – where the band is hooked, not wrapped
• Single ply eye-eye webbing sling – the same band with two sewn eyes
• מנשא הרמה אינסופי – the category, and choosing by the load
• מנשא עגול אינסופי – a sleeved core for awkward shapes
• Polyester webbing sling – הסיבים, and the elongation figure
• רשת להרמת מטען – אותו משלוח, מרושת במקום נטויה