Transportation of oversized cargo always requires considerable effort and the use of special equipment. You have to lift such objects with the help of rope slings, they are also “caps”. They are made from high-strength steel or from strong synthetics, or reliable plant materials. Among other types of slings, rope slings remain the undoubted leader, because they can withstand even the heaviest loads.
Content
Rope slings are considered an easy-to-maintain device for lifting loads, they are widely used in various areas of construction, production and economic activity. They look like ordinary ropes made from synthetic or steel fibers, and at their ends there are loops / hooks for attaching to the load.
In the production of the type of sling in question, several ropes are used at once, having a mandatory core, on which the wire thread is wound. The ends of the steel cable are twisted, forming loops, for which the method of manual weaving or pressing is used. In the subspecies of ring rope slings, the production technology is slightly different: they have a completely closed loop design, where both ends are fixed to each other. At the same time, it is allowed to place a thimble in the upper part, and the lower one can be equipped with:
In order to effectively use the devices in question, it is necessary to strictly observe the norms of state standards in the process of their manufacture.As a result, the final product is always equipped with an information tag, which indicates its maximum load capacity and the date of the last test, as well as the name of the manufacturer.
Rope equipment is used where constant movement of heavy objects is required. Due to its special resistance to various extreme conditions, such slings are often used in:
These certainly include the following points:
The disadvantages of the equipment under consideration are few: they include only a rather impressive weight and some restrictions when working in extremely chemically aggressive environments. Also, do not turn over extremely fragile objects that are not provided with external protection.
The technology for the production of rope slings is established by the State Standard No. 25573 and Guiding Documents No. 10-33 of 1993. The quality of manufacturing materials is enshrined in the State Standard No. 1050 and involves their manufacture from steel grade "60", but not lower. The rope must be braided in the way of twisting wire threads, and there must be a core inside. The twining can be carried out according to the double or cruciform method. The wire threads used must have a layer of special lubricant. Inside the wire weave is a core made on the basis of ordinary hemp. It is convenient in that it easily absorbs excess lubricant from the wire and thereby gives the final product the necessary flexibility properties. As a result, the pressure exerted on the sling does not allow the wire threads to quickly wear out and fray. Sometimes the core can be made of asbestos or steel.
This category of accessories will help to significantly expand the capabilities of the sling. For example, special hooks or carabiners can be installed on it, which will provide better attachment of the rope to the object being transported. Also, retrofitting is possible by means of a high-strength steel traverse or the use of special cargo grips - these devices will be very useful in the auto industry. If the rope sling has an open type, then it is equipped with a thimble - this is a special teardrop-shaped or oval-shaped mandrel made of steel. Using the thimble, you can reduce the pressure exerted on the loop, making its bends smoother, which in turn will reduce the degree of abrasion of the working base. To move bulky goods with an unusual shape, links can be used.
On today's market, there are two types of the device in question - these are loop and branch slings. The latter are several ropes linked between each other, with hooks installed at the end. The first have loops at the ends, so they are not attached to the load, but only wrap it around.
Depending on the number of branches available, the product marking will also differ:
All of the above data must be reflected in the information tag of the product. In addition, the following information must be included:
IMPORTANT! State Standard No. 3377 also provides for the addition of additional data to the tag that may be of technical importance, for example, the estimated service life of the product.
In fact, these are measures for the regular inspection of the product for the absence / presence of defects.They are carried out in order to ensure the safety of working people and the integrity of transported objects. It is for rope slings that the following inspection procedure is provided:
The entire process must be carried out by an authorized specialist with appropriate approvals. Based on the results of the inspection, he makes a decision on the rejection of the sling or its further operation.
The following flaws may indicate the critical wear of a rope sling:
The storage process of rope slings also has strict regulations:
Thus, any copy should be safe and be ready for work at any time.
Regarding the minimum service life of the type of equipment in question, then, according to regulatory and technical documents, it is:
Before buying rope slings, you should decide in advance what weight and what dimensions of cargo will have to be handled. This will affect the selection of the size of the rope section, its type of weaving, as well as the overall length and the need for additional equipment. You should always check the product for its full compliance with the state standards in force in the Russian Federation, which will be directly recorded in the accompanying documents. As a result, the following questions should be considered:
Slings must correspond to the mass of the object being transported, although its (mass) excess is allowed within 25% of the possible, which should be implied by the design of the sling itself. The gripping devices (hooks and loops) present on the product must properly ensure the security of fastening. At the same time, it is not recommended to choose rope slings with a large diameter if it is intended to work only with light weight loads, or when it will only be necessary to perform the tying function.
Selection questions regarding the characteristics of the carrying capacity should relate to such nuances as:
Regarding the information and technical support of the goods, it is necessary to make sure of the following qualities:
The model is a closed ring, manufactured using serial technology. It is one of the main components for rigging. Convenient for slinging loads with almost any configuration.When combined, it is convenient to work with steel pipes, other types of rolled metal items, as well as with objects made of reinforced concrete and most of the overall timber. The recommended cost for retail chains is 620 rubles.
This rope branch is intended for the equipment of the rigging route. In view of the focus on intensive operation, the manufacturer has provided for the possibility of easy replacement of worn parts. The model fully complies with current state standards (No. 25573 of 1982) and guidelines No. 10-33 of 1993 and No. 10-231 of 1998. The recommended cost for retail chains is 650 rubles.
The model fully complies with the requirements of the state standard No. 25573 of 1982. Produced by braiding and crimping on an aluminum core. This model has found its wide application in various fields: industrial production, construction, in the field of various unloading and loading operations, installation work and for the banal transportation of goods.It is characterized by an increased margin of safety, resistance to wear, as well as to permanent strong mechanical loads. Very easy to use. The recommended cost for retail chains is 760 rubles.
This device can easily distribute the load on pairs of branches. Loops at the ends of the cable will be able to withstand a lot of weight. The applied braiding technology guarantees the reliability of the quality of work. The existing aluminum core, coupled with the production method of pressing, is an excellent result. The recommended cost for retail chains is 1950 rubles.
This product must be used with a harness for positioning and securing harnesses. At the same time, it is easy to use as a base for safety systems. At the same time, it is possible to vary the speed of changing the length of the sling, which will have a beneficial effect on positioning. As a result: the knots of the sling received a heat-shrink film, through which external deformations are easily visually detected.The model is designed to lift an object weighing up to 150 kilograms. The recommended cost for retail chains is 3119 rubles.
A simple and versatile model that can withstand 3 tons. The special rope diameter of 18 millimeters ensures a proper grip. The total weight of the fixture is seven and a half kilograms (7.5 kg). The product is made according to the state standard No. 58752 of 2019. The recommended cost for retail chains is 5600 rubles.
This model can be made in two variations: either by the braiding method, or by the crimping method with the inclusion of an aluminum sleeve. The branches are securely fastened to a triangular link of the “Pt” type. The production material is high-strength steel, the maximum total operating load is 30 tons, the length of the rope is 4 meters. The recommended cost for retail chains is 12,300 rubles.
This durable steel sling is made in the 3SK design, is particularly reliable in operation, is characterized by long-term operation, good wear resistance and an adequate price. Nevertheless, it has a fairly large dead weight, but this is more than covered by the carrying capacity of the product, as well as its strength. The surface of the sample and all its working parts are made in such a way that any, even the most insignificant damage to it, becomes immediately visually noticeable, which means that it is possible to prevent an emergency in time, take the product out of service, replacing it with a new one. The recommended cost for retail chains is 19,600 rubles.
This powerful model of rigging equipment is widely used in factories and plants, ports and construction sites, as well as warehousing. Its design of four branches provides reliable fastening of any oversized object, which is very important when lifting various building materials, ship parts, bulky internal building structures for buildings to a height. When working with special types of cargo, the latter will require the presence of special lugs in order to secure the work hooks as firmly as possible. The recommended cost for retail chains is 21,000 rubles.
A competent choice of rope slings will ensure not only their effective use, but the safety of employees working with them. Separately, it is worth paying attention to the compliance of work tasks with the technical characteristics of the slings used, namely: total length, maximum load capacity, dead weight, specific strength and service life.