nominal strength of wire rope made in china

Ungalvanized and galvanized steel wire rope is a kind of interwoven flexible cord, which consists of strands of thin wire. It has advantages of high strength, light weight, smooth work and not easy to suddenly broken. Besides, they can serve in many circumstances. And Special specification and marks can be made according to customers requirement.

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6×19 construction wire rope is available with either FC (fibre core) or WSC (wire strand core). When supplied with a wsc the rope is more commonly referred to as 7×19. The rope is very popular in diameters from 3mm to 16mm and is used on a variety of applications. 6×19 FC and 6×19 WSC (7×19) is very flexible in diameters 3mm to 6mm and is used for many requirements where wire ropes are running over pulleys. 7×19 construction is readily available in both galvanised and marine grade stainless steel.

Wire rope slings adopt precast concrete construction and the main parts include wire rope, inner core, strand, center, steel wire, steel stocks and others.

We can customize various kinds of rigging according to customers’ requirement. Usually, the minimum circumference S of the sling is 50 times the wire rope diameter and the bending radius must be not less than 4 times of the wire rope diameter. The zone between the clamps can’t be bent under lifting force and the length is intended to be the dimension measured between the bearing points of the slings and the measured length of a ferrule-secured sling shall not differ from the nominal length by more than two rope diameters or 1% of the nominal length.

There are various sockets available such as open socket, closed socket and others. Also, the eye type include Flemish eye, pressed soft eye, spliced eye, thimble eye, standard eye, hard eye at both end.

①Vertical hitches are made directly from the crane hook to the load. Full rated capacity of the slings may be used but never exceeded. A tagline should be attached to prevent rotation which can damage the sling. A sling with a hand-tucked splice can’t lay and fail if the sling is allowed to rotate.

②Choker hitches reduce lifting capability of a sling, since this method of rigging affects the ability of the wire rope components to adjust during the lift, places angular loading on the body of the sling, and creates a small diameter bend in the body at the choke point.

Wire rope slings are always packaged in plywood reel/plastic reel/wooden reel/coil in container, and then they will be palletized or put into a crate or a box.

There are various types of wire rope slings including slings with soft eye, hoist slings, slings with soft eye and two legs, steel ferrule secured slings, slings with Flemish eyes, ferrule secured endless slings, slings with steel-ferrule secured end stops, slings with swaged steel tie rod, slings with single hook, slings for crane, slings with sockets, slings with master link and two legs, slings with cuneiform connector, flat wire rope mesh slings, slings with master link and four legs, endless wire rope slings, container lifting slings for sea oil platform, large diameter cable laid slings, slings for lifting reinforcing steel bars, cable laid grommet slings, cable stocking, slings with spliced eye termination and others, and the main products are as following.

2-Leg bridle slings constructed of two wire rope assemblies that are attached to an oblong ring are designed for general lifting when the attachment can be made directly to the load. The lifting ends of the wire rope legs can be fitted with a variety of hooks, eyes, or rings to allow attachment to nearly any object. The advantage of wire rope slings is that they are resistant to corrosion, heat, sunlight and most chemicals and they are custom built to meet your specific needs for any application.

3-Leg bridle wire rope slings constructed of three wire rope assemblies that are attached to an oblong ring are designed to handle unbalanced loads. The lifting ends of the wire rope legs can be fitted with a variety of hooks, eyes, or rings to allow attachment to nearly any object. We carry a range of wire rope slings in our hire fleet with soft eye configurations at each end, available in various capacities and effective working lengths.

4-Leg bridle wire rope lifting slings constructed of four wire rope assemblies that are attached to an oblong ring are designed for balanced or unbalanced loads and for heavy lifts when the weight can easily be distributed over four points. The lifting ends of the wire rope legs can be fitted with a variety of hooks, eyes, or rings to allow attachment to nearly any object.

The endless wire rope slings are orbicular, economical and adaptable slings with no fixed wear points, using special technology and the most advanced equipment and known for its softness, high tension and increased suspension points. They are suitable to lift and move tubes, pipes and long metal parts which suited in small and limited spaces and for high/large lifting loads, they are also adaptable for special bulk hoisting requirements of different conditions, such as transformers, shipbuilding and special machinery (where the warning mark locates cannot be used as lifting point)

Slings can be realized with galvanized or ungalvanized wire rope, special rope protected by strong PVC sleeve to resist against sharp edges without damaging the goods surface is also available as per your request.

7. According to the strength, wire rope slings can be divided into vertical breaking strength, chocker breaking strength, basket breaking strength, and except for standard eye size, thimble eye size, there are others of different eye hook capacity.

④Evidence of heat damage or if a wire rope sling having a fiber core is exposed to temperatures in excess of 200° F or if a wire rope sling having a steel core is used at temperatures above 400° F or below minus 60° F.

⑤Corrosion of the rope or end attachments or not laying and opening up of a tucked splice. Also, when end attachments that are cracked, deformed, or worn.

⑥Deformation—any visibly apparent bend or twist from the plane of the unbent hook. Throat opening—any distortion will cause an increase in throat opening of 5% not to exceed capacity.

⑦Avoid twists, kinks and knots before lifting, store wire rope slings where they will not be subjected to dirt, moisture, extreme heat, corrosion or mechanical damage.

⑧Protect the sling body against sharp edges and corners of loads, protrusions or abrasive surfaces. Sharp bends can distort wire rope and reduce its strength.

⑨Never "shock load" wire rope slings, the actual force caused by a sudden application of load can easily exceed rated capacities and damage slings and abruptly releasing a load can also damage the slings.

Original equipment wire rope and replacement wire rope must be selected and installed in accordance with the requirements of this section. Selection of replacement wire rope must be in accordance with the recommendations of the wire rope manufacturer, the equipment manufacturer, or a qualified person.

Wire rope design criteria: Wire rope (other than rotation resistant rope) must comply with either Option (1) or Option (2) of this section, as follows:

Option (1). Wire rope must comply with section 5-1.7.1 of ASME B30.5-2004 (incorporated by reference, see § 1926.6) except that section"s paragraph (c) must not apply.

Option (2). Wire rope must be designed to have, in relation to the equipment"s rated capacity, a sufficient minimum breaking force and design factor so that compliance with the applicable inspection provisions in § 1926.1413 will be an effective means of preventing sudden rope failure.

Type I rotation resistant wire rope ("Type I"). Type I rotation resistant rope is stranded rope constructed to have little or no tendency to rotate or, if guided, transmits little or no torque. It has at least 15 outer strands and comprises an assembly of at least three layers of strands laid helically over a center in two operations. The direction of lay of the outer strands is opposite to that of the underlying layer.

Type II rotation resistant wire rope ("Type II"). Type II rotation resistant rope is stranded rope constructed to have significant resistance to rotation. It has at least 10 outer strands and comprises an assembly of two or more layers of strands laid helically over a center in two or three operations. The direction of lay of the outer strands is opposite to that of the underlying layer.

Type III rotation resistant wire rope ("Type III"). Type III rotation resistant rope is stranded rope constructed to have limited resistance to rotation. It has no more than nine outer strands, and comprises an assembly of two layers of strands laid helically over a center in two operations. The direction of lay of the outer strands is opposite to that of the underlying layer.

Type I must have an operating design factor of no less than 5, except where the wire rope manufacturer and the equipment manufacturer approves the design factor, in writing.

When Types II and III with an operating design factor of less than 5 are used (for non-duty cycle, non-repetitive lifts), the following requirements must be met for each lifting operation:

A qualified person must inspect the rope in accordance with § 1926.1413(a). The rope must be used only if the qualified person determines that there are no deficiencies constituting a hazard. In making this determination, more than one broken wire in any one rope lay must be considered a hazard.

Each lift made under § 1926.1414(e)(3) must be recorded in the monthly and annual inspection documents. Such prior uses must be considered by the qualified person in determining whether to use the rope again.

Rotation resistant ropes may be used as boom hoist reeving when load hoists are used as boom hoists for attachments such as luffing attachments or boom and mast attachment systems. Under these conditions, all of the following requirements must be met:

The requirements in ASME B30.5-2004 sections 5-1.3.2(a), (a)(2) through (a)(4), (b) and (d) (incorporated by reference, see § 1926.6) except that the minimum pitch diameter for sheaves used in multiple rope reeving is 18 times the nominal diameter of the rope used (instead of the value of 16 specified in section 5-1.3.2(d)).

The operating design factor for these ropes must be the total minimum breaking force of all parts of rope in the system divided by the load imposed on the rope system when supporting the static weights of the structure and the load within the equipment"s rated capacity.

Wire rope clips used in conjunction with wedge sockets must be attached to the unloaded dead end of the rope only, except that the use of devices specifically designed for dead-ending rope in a wedge socket is permitted.

Prior to cutting a wire rope, seizings must be placed on each side of the point to be cut. The length and number of seizings must be in accordance with the wire rope manufacturer"s instructions.

The following guidelines are principally directed towards crane operators who need to periodically replace steel wire ropes and to crane designers who are required to specify ropes for new build projects.

When replacing a steel wire rope on any crane or appliance reference should be made to the relevant original equipment manufacturers manual, the wire rope manufacturers test certificate originally supplied with the crane or appliance and to any other relevant documentation.

In order to ensure safe and efficient operation, Brunton Shaw UK recommends that any replacement wire rope should conform with the specified nominal diameter and at least equal the required strength originally specified by the manufacturer of the machine or appliance.

Additionally, the wire rope construction selected should provide an equal or greater resistance to rotation, bend fatigue, crushing, abrasive wear, and corrosion.

A 6X19 class wire rope contains 6 strands with 16 through 26 wires per strand. Our 6x19 class typically has either 19 (6X19) or 26 (6X26) wires per strand. It is a general purpose rope most commonly used for wire rope chokers and other rigging. 6X19 and 6X26 offfer great abrasion resistance and crush resistance when spooling.

A 6X37 class wire rope contains 6 strands with 27 through 49 wires per strand. Our 6X37 typically has 36 wires per strand. It is a general purpose wire rope with excellent flexibility for spooling. With the smaller wires per strand, the trade off for excelelnt flexibility is reduced abrasion resistance.

IWRC (Independent Wire Rope Core) wire ropes offer more crush resistance when spooling while FC (Fiber Core) wire ropes offer more flexibility. FC wire ropes are not as crush resistant when spooling compared to an IWRC wire rope.

A combination of steel grades is used and heat treatment processes to manufacture soft, medium and hard tensile grades. The table below is indicative only of steel chemistries used.Tensile Grade% Carbon% Phosphorus% Manganese% Silicon% Sulphur

We use total quality control system. Every pieces of the raw material; semi-finished products and finished products are tested and recorded in file. The tracking record is used from final products to the very first beginning raw material steel factories.

Q: Manufacturer or Trader?A: We are manufacturer in wire industry for more than 20 years. Q: Producing Capacity?A: The producing capacity totally is 9, 000 tons per month. The producing capacity of this product is 1,500 tons per month.Q: Main Market?A: Our main market is foreign customers. 80% of the products are for exporting. The main countries are Japan, South Korea, South Asian area, Europe, America, Canada, and South America etc.Q: What information should I provide when inquiring?A: The diameter before pvc coating; after pvc coating, the requirement of the core wire like zinc coating, tensile strength, packing, colourQ: What is the MOQ?A: For quality checking, we accept small quantity order like one coil. For normal cooperation, we prefer FCL container quantity to ensure the safety of goods in transportation.Q: What is the payment term?A: T/T; L/C; D/P etcQ: Free sample available?A: Yes. Free sample within 2kg is availableQ: Third Party Inspection available?A: Yes, available. The charges are on the buyer.

Redundancy is very important for safety-relevant applications. If one of individual elements is broken, other elements will take on its function and remain in operation taking advantages of interaction between wires.

Detectability means the capacity to determine the end of service life and the degree of bending fatigue of running wires. As fatigue increase, more external wire breaks so that it is possible to estimate by visible inspection before the condition becoming dangerous.

Normally, elevator wire ropes feature parallel strand construction for reducing incidence of abrasion compared with ropes with cross laid construction. Meanwhile, they have a high fatigue bending life and less wear to running sheaves.

Fiber core, made of natural or synthetic fibers, is widely used in ropes and makes elevator ropes easier to adjust up to the relevant groove shape. Meanwhile, fiber core provides excellent resistance against contact pressure and long-term support for elevator wire ropes.

Independent wire rope core effectively increases the metallic cross-section of elevator wire ropes and reduce tensile stress in individual wires. Meanwhile, steel cores low the elongation of elevator wire ropes under same loads compared with fiber core.