Know-how

Glossary: big bag terms

The most important terms as they appear in data sheets, standards and quotations.

As of: 23 October 2026 · German original technically reviewed by Dennis Alexandrakis on 23 October 2026; this English version is a translation of it.

TermMeaning
Big bagFlexible bulk container made of fabric with lifting loops. Technical term: FIBC (flexible intermediate bulk container).
SWLSafe working load, the permitted payload in kg.
SF 5:1Safety factor: breaking load at least five times the load capacity (single-trip). Multi-trip: 6:1.
EN ISO 21898Standard for flexible bulk containers (FIBC) for non-hazardous goods.
GSM / g/m²Weight per unit area of the fabric (grams per square metre).
U-panelConstruction in which the bottom and two side walls are made from one piece of fabric cut in a U shape.
SkirtExtended fabric at the top that is tied shut after filling.
Swan neckTubular inlet or outlet on the special big bag.
LinerInner sack made of polyethylene (PE) that is inserted into the big bag or flat bag.
CoatingThin plastic layer on the fabric against moisture and dust.
Overlock / safety stitchTypes of seam: overlock seam with an additional safety seam.
Crane eye (craneye)Attachment point on the container bag for moving with the crane.
TRGSTechnical Rules for Hazardous Substances. TRGS 519 (asbestos), TRGS 521 (fibre dust).
PUPacking unit: pieces per pallet, bundle or bale.
Type A to DClassification of big bags by electrostatic behaviour (IEC 61340-4-4).
UN packagingPackaging approved for dangerous goods under ADR/RID. An approval in its own right, not part of this item overview.
Lifting loopWebbing loop on the bag to which the bag is attached. Four on big bags; always attach all of them together.
Flat bottomClosed, flat bottom on which the bag stands stably.
InletOpening at the top through which the bag is filled. On the special big bag, a swan neck that is tied to the filling spout.
OutletOpening at the bottom through which the bag is emptied. On the special big bag, a swan neck with closure.
SpoutTubular extension at the inlet or outlet, stated as diameter × height in cm.
Tape fabricFabric made of narrow, drawn polypropylene tapes.
4-panelConstruction with a separate piece of fabric for each side wall.
Circular fabricFabric woven as a tube without vertical side seams.
Breaking loadLoad at which the bag fails in the test. At safety factor 5:1, at least five times the load capacity.
Cyclic testTest with repeated loading; in the example of our test report, with twice the load capacity over 30 cycles.
Peak load testTest in which the bag is loaded with a multiple of the load capacity; in the example, with five times the load.
Nominal volumeLength × width × height of the external dimensions. The actual fill volume is lower.
Bulk densityWeight of a material per cubic metre in the loose state, in t/m³. Determines how heavy a bag gets.
Fill levelProportion of the bag height up to which it is filled without exceeding the load capacity.
Sheet bagFlat, long bag for corrugated sheets and stackable components, 260 or 320 cm long.
Container bagLining for roll-off containers with lid, retaining and closing straps and crane eye.
PP flat bagOpen polypropylene sack without lifting loops, with closing strap or drawcord in the hem.
Warning printMarking printed at the factory; on the asbestos bag in seven languages, on the mineral wool bag in three.
Asbestos cementBuilding material made of cement and asbestos fibres, for example corrugated sheets and facade panels. Waste under TRGS 519.
Old mineral woolInsulation material from existing buildings that can release fibre dust when removed (TRGS 521).
ADREuropean Agreement concerning the International Carriage of Dangerous Goods by Road, implemented in Germany by the GGVSEB.
GGVSEBGerman ordinance on the carriage of dangerous goods by road, rail and inland waterway.
Lifting accessoriesLifting-gear accessories such as ropes, chains, slings and hooks with which the bag is attached to the crane or forklift.
Risk assessmentWritten assessment by the company of the hazards of an activity, the basis for protective measures.
Competence (Sachkunde)Proven expertise for certain activities, for example for asbestos work under TRGS 519.
Disposal certificateProof of the disposal of a waste that commercial deliverers need in advance at some acceptance points.
Declaration of conformityDeclaration by the manufacturer that the item conforms to a standard; for our bags, to EN ISO 21898.
Bundle, balePackaging levels: several bags form a bundle, several bundles a bale or a pallet.
StackabilityWhether filled bags may be stored on top of one another. Permitted only if the manufacturer provides for it for the item and the stacking height has been checked.
Safety data sheetDocument from the manufacturer of a substance with information on properties, hazards and handling. Basis for choosing packaging and protective measures.
Dangerous-goods safety adviserPerson in the company or external who monitors compliance with dangerous-goods law in packing, loading and transport.
Accompanying documentDocument that accompanies hazardous waste on the way to disposal and proves the route.
Filling edgeUpper limit up to which a bag may be filled. Acceptance points sometimes require filling only up to the filling edge.
Spreader beamCross beam on the crane that connects several attachment points and takes long loads evenly.
BatchProduction lot of an item. Where a label carries a batch number, the bag can be traced back to its manufacture.
PantoneColour system for solid colours in printing. The asbestos warning print uses Pantone 485 C (red) and black, the mineral wool warning print Pantone 424 C (grey).
Solid colourA single, unmixed printing ink. Multicolour motifs with gradients are examined individually for printing.
Vector fileGraphic made of lines and areas (PDF, SVG, AI, EPS) that can be scaled without loss of quality. Best template for printing.
Print templateFile that defines motif, size, colours and position for printing. We agree it with you before production.
SpecificationWritten definition of the dimensions, load capacity, fabric, bottom, liner and print of a custom-made bag, produced in the Bag Configurator.

Sources and date

  • Item data and data sheets of DS SafetyWear Arbeitsschutzprodukte GmbH, EN ISO 21898, IEC 61340-4-4, TRGS 519 and TRGS 521.

As of: 23 October 2026. General technical information, not legal advice. The data sheet, label and the requirements of your waste disposal company or client take precedence.

A brand of DS SafetyWear

The brand family of DS SafetyWear Arbeitsschutzprodukte GmbH

Every brand leads in its category. ProSafe Big Bag is the brand for big bags and sacks.