On this page you will find frequently asked questions from our customers about sling chains. If you have a question that is not answered here, please do not hesitate to ask us. We will be happy to answer them for you in person or by mail.
Explanation: Lifting chains of GK8 and GK10 are among the most important lifting gear. They are used in a wide variety of applications to lift heavy loads or goods (e.g. in construction or industry).
Explanation: Stop shortening hooks are always used in conjunction with chain slings. The variably applicable shortening hooks with safety device save components and shorten sling and lashing chains directly in the working area.
You can obtain sling chains from Dolezych in grades 6, 8, 10 and 12.
Other grades on request.
Please ask your Dolezych team for chain slings for special applications!
The difference between the individual grades of sling chains is that the load capacity increases with increasing grade while the material thickness remains the same.
The quality class of a chain as well as its components (hooks, connecting links, shorteners, etc.) can be recognised by the quality class marks 8, 10 and 12.
In the tables on the information pages on sling chains you will often find two angles. These angle values refer to the angle of inclination. The angle of inclination is determined by the degrees between an imaginary vertical straight line and the chain itself. The load capacity of a chain strand changes depending on the respective angle of inclination of a slung load: The greater the angle of inclination, the lower the load capacity. Angles of inclination exceeding 60° are not permitted! If different angles of inclination occur in the case of multiple-strand sling chains (asymmetrical load distribution), only the load-bearing capacity of the strand with the greatest angle of inclination may be taken as a basis. In individual cases, shortening hooks and compensating rockers can be helpful here.
In contrast to the angle of inclination, the angle of spread measures the angle between two chain strands (maximum 120°).
The useful length L describes the length of a sling chain plus its fittings, as shown in the following diagram.
The hook openings must always face outwards in order to avoid unintentional unhooking of the load.
Yes, the chain strands that are not under load are hung back in the suspension link/set. In this case, the permissible WLL is reduced to that of a single strand chain.
Factory certificate DIN EN 10204-2.1 and declaration of conformity are automatically included in the scope of delivery. A chain file card is issued in the course of our annual UVV inspection.
Further documents on request.
A sling chain is always marked with a load capacity tag and by us additionally with a UVV inspection sticker.
In this case, the sling chain is downgraded to quality class 2 (DIN 685) and must be inspected promptly by an expert. Use our Dolezych inspection service for this purpose.
In principle, a sling chain must be inspected by an expert before it is put into operation for the first time. In addition, DGUV 109-017 prescribes regular inspections at intervals of no more than one year by an expert for load handling attachments. However, depending on the conditions of use, tests may be required at intervals shorter than one year. This applies, for example, in the case of particularly frequent use, increased wear, corrosion or heat exposure or if increased susceptibility to faults is to be expected. Round steel link chains used as slings must be subjected to a special inspection for freedom from cracks at intervals of no more than three years (or no more than two years in Austria). We carry out this crack testing with an electromagnetic crack tester in our laboratory or with our test van on your premises.
Are you interested in our testing service? You can find important information here.
No, the use is in accordance with the BG rules and DIN standards are not permitted.
The following table shows the load capacity per grade as a function of temperature.
|GK 6||DoKett stainless steel||100%||75%|
|-20°||-10°||0° to +100°||+150°||+200°||+250°|
The applicable regulations and technical rules for sling chains can be found in detail in the following works:
If necessary, additional special regulations must be observed, e.g. for the transport of dangerous goods.
You can download the operating instructions for sling chains here . You will find a general overview of our operating manuals here.
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