WELCOME
QINGDAO LG RIGGING CO.,LTD. ,which was called CHINA LG SUPPLY for short, is located in the largest rigging hardwares production base – Shandong, China.
With over 15 years’ experience in the rigging production, China LG Supply has a long tradition of excellent service, competitive prices and a strong commitment to quality.
In addition to the products shown in our catalogue, we offer a full line of trawling gear,marine hardware,lifting & rigging hardware and all related products. Our complete range of lifting solutions are customized to your individual needs.
90% of our products have been exporting to Germany, Australia, USA, Italy, Sweden and other European and American markets.
FEATURED CATEGORIES
Swivel for Trawling Gear
Shackle for Trawling Gear
Viking Hooks/Links/Rings
Wire Rope Clips & Grips
Martellatura inox
Tenditori
G80 Ganci
Eye Bolts & Nut
Ditali Wire Rope
Terminali inox
FEATURED PRODUCTS
Stainless Steel Drop Forged Weld-on D Ring – China LG™
- In acciaio inox (AISI 316).
- Include Forged staffa.
- Per l'uso con Argani, Tie-Downs e Blocco.
- Dispone di un elevato carico di lavoro Limite e fornisce un forte, sicuro punto di tie-down.
Turnbuckle Drop Forged Stainless Steel Eye&Eye US Type
- Forgiato
- Dimensioni standard.
- filettatura standard UNC.
- Resistente alla corrosione.
- 304 o 316 in acciaio inox.
HOW TO ?
NEVER EXCEED THE WORKING LOAD LIMIT
NEVER EXCEED THE WORKING LOAD LIMIT
Working Load Limit
This is the term used throughout the catalog. There are, however. Other terms used in the industry which are interchangeable with the term Working Load Limit. These are: WLL, SWL, Safe Working Load, Rated Load Value, Resulting Safe Working Load, and Rated Capacity.
Never exceed the Working Load Limit.
The Working Load Limit is the maximum load which should ever be applied to a product, even when the product is new and when the load is uniformly applied – straight line pull only. Avoid side loading. All catalog ratings are based upon usual environmental conditions, and consideration must be given to unusual condition such as extreme high or low temperatures, chemical solutions or vapors, prolonged immersion in salt water, etc. Such conditions or high-risk applications may necessitate reducing the Working Load Limit.
Welding and Modifications Affect the Working Load Limit
Working Load Limit will not apply if product has been welded or otherwise modified. It should also be noted that it is the ultimate responsibility of the end user to determine a Working Load Limit for each application.
Components Working Load Limits Must Match.
Make certain that components such as hooks, links or shackles, etc. used with wire rope (or chain or cordage) are of suitable material size and strength to provide adequate safety protection. Attachments must be properly installed and must have a Working Load Limit at least equal to the product with which they are used. Remember: Any chain is only as strong as its weakest link.
Raised load.
All employees working with cranes or hoists or assisting in hooking or arranging a load should be instructed to keep out from under the load. From a safety standpoint, one factor is paramount: Conduct all lifting operations in such a manner, that if there were an equipment failure, no personnel would be injured. This means keep out from under a raised load and keep out of the line of force of any load.
Shock Loads.
Avoid impacting, jerking or swinging of load as the Working Load Limit could be exceeded and the Working Load Limit will not apply. A shock load is generally significantly greater than the static load. Avoid shock loads.
Inspect product regularly.
No product can keep operating at its rated capacity indefinitely. Periodic inspections help determine when to replace a product and reduce rigging hazards. Check for visible damage, cracks, wear, elongation, rust, etc. When in doubt about the extent of the damage, retire the item in question immediately.
Such breaks can cause loads to fail or swing out of control, possibly resulting in serious injury or death as well as major property damage.
Therefore:
➡ Never exceed the Working Load Limit (WLL).
➡ Match components properly.
➡ Keep out from under a raised load.
➡ Avoid shock loads.
➡ Inspect products regularly.
Guida clip della fune di installazione Filo
Guida clip della fune di installazione Filo
Wire rope clips are widely used for making end terminations. Clips are available in two basic designs; the U-Bolt and fist grip. The efficiency of both types is the same.
When using U-Bolt clips, extreme care must be exercised to make certain that they are attached correctly; Incorrect installation can reduce the working load limit by 40%. Below are general guidelines for installing wire rope clips.
First, wire rope clips should be inspected before use to ensure that:
• all markings are legible;
• the wire rope clip is free from nicks, gouges and cracks;
• a wire rope clip with the correct dimension has been selected;
• never repair or reshape a wire rope clip by welding, heating or bending as this may affect the performance.
And then, The following is based on the use of proper size U-Bolt clips on new rope.
Step 1. Turn back specified amount of rope from thimble or loop. The first clip must be placed one bridge width from the turned back rope tail or dead end of the rope, Apply U-Bolt over dead end of wire rope – live end rests in saddle (Never saddle a dead horse!) Tighten nuts evenly, alternate from one nut to the other until reaching the recommended torque.
Step 2. When more than two clips are required, apply the second clip as near the loop or thimble as possible, tighten the nuts firmly but not yet to the specified torque.
Step 3. When three or more clips are required, space additional clips equally between first two – take up rope slack – tighten nuts on each U-Bolt evenly, alternating from one nut to the other until reaching recommended torque.
Step 4. Apply first load to test the assembly. This load should be of equal or greater – weight than loads expected in use. Next, check and retighten nuts to recommended torque.
In accordance with good rigging and maintenance practices, the wire rope end termination should be inspected periodically for wear, abuse, and general adequacy. Periodically re-tightening of the nuts must be done at 10.000 cycles (heavy usage), 20.000 e.g. every 3 months, 6 months, annually.
Also, the tightening and retightening of the nuts must be accomplished as required.
Use only forged clips for critical, heavy duty, overhead loads, such as support lines, guy lines, towing lines, tie downs, scaffolds, etc.
Malleable clips are to be used for making eye termination assemblies only with right regular lay wire rope and only for light duty uses with small applied loads, such as hand rails, fencing, guard rails, etc.
China LG alimentazione fornirgli l'alta qualità wire rope clips, in a range of sizes and designs, according to your needs and desires.
e.g. malleable wire rope clip din741,forged wire rope clips g-450, stainless steel Wire rope clips.
Quale tipo di catena legante devo usare?
Quale tipo di catena legante devo usare?
Chain binder also known as a load binder, these two terms are used interchangeably. Chain binders are tools used to bind, clamp, anchor or tie down large cargo loads for transport. There are two basic types of chain binders – lever binders and ratchet binders.
Also called a ratchet chain or ratchet load binder, this device uses a ratcheting action to tension chain and secure cargo. A ratchet binder consists of a ratchet handle and two tension hooks on each end.
When using a ratchet binder, the lever and screw work together and increase the force manually applied to the tie-down assembly. The result is that it takes much less pulling force on the handle to apply tension than you would need with a lever binder.
Ratchets also allow for slower, steadier loading and unloading of forces. This reduces any undue stress or strain on your body. Since ratchet binders are designed with a gear, handle, pawl and end fittings, they will not store up as much energy in the handle as a lever binder will.
Another advantage of ratchet binders is that take-up is safer. The take-up distance of a ratchet binder is typically eight to ten inches – twice that of a lever binder. While take up with a ratchet binder may take a few extra minutes, it is more controlled and ultimately a safer process.
Also called a snap binder, lever chain or lever load binder. Chain-tensioning device uses a leverage action to tighten and secure loads. With a tension hook on each end, this binder requires more strength to tighten than ratchet binders.
A lever binder is made up of a simple machine, a lever, with a tension hook on each end. The lever is used to increase the force applied to a tie down. The lever is hinged and takes up the slack by pulling on one end of the tension hook and will lock itself after a 180-degree rotation of the lever around the hinge. Some of the advantages of choosing a lever-type binder include: Easy installation, Fewer moving parts (less maintenance).
Routinely check load binders for wear, bending, cracks, nicks, or gouges. If bending or cracks are present – Do not use load binder.
Routinely lubricate pivot and swivel points of Lever Binders, and pawl part and screw threads of Ratchet Binders to extend product life and reduce friction wear.
Stainless Steel Can Also Be Magnetic
Stainless Steel Can Also Be Magnetic
Stainless steel is a common name for metal alloys that consist of 10.5% or more Chromium (Cr) and more than 50% Iron (Fe). Although it is called “Stainless” a better term for it is “highly stain resistant.” It is a darker metal. There are two process methods to make it bright, both are surface treatments.
There are three major classes of stainless steel
1. Austenitic: Chromium-nickel-iron alloys with 16%-26% chromium (Cr), 6%-22% nickel (Ni), and low carbon content, with non-magnetic properties. Type 304 ( 18% chromium, 8% nickel ) is the most commonly used grade or composition.
2. Martensitic: Chromium-iron alloys with 10.5%-17% chromium and carefully controlled carbon content. It has magnetic properties! Type 420 is a typical example. It is mostly used in knives and kitchen equipment.
3. Ferritic: Chromium-iron alloys with 17%-27% chromium and low carbon content, with magnetic properties! Type 430 is the most commonly used ferritic.
The magnet test is NOT a correct way to verify stainless steel. Stainless steel is graded by the ingredients and percentages. Stainless is a man made alloy. The nickel content determines the grade of stainless. The chromium content must be 18% or more to be 304 stainless. It starts out as non-magnetic. After a 500 ton press squeezes the nickel it changes the distribution of the nickel. The same is true where the die cuts the stainless increasing the possibility that rust will eventually occur there. All stainless steel is magnetic except austenitic stainless steel which is actually 300 series stainless such as 304 and 316. However, 300 series stainless is non-magnetic only after it is freshly formed. 304 is almost for sure to become magnetic after cold work such as pressing, blasting, cutting, etc. Initially the cold work causes the stainless to pick up foreign particles such as free iron. Then at some spots the metallic crystal structure changes from austenite to martensite. 400 series stainless (ie. martensitic stainless steel) is magnetic. Stainless steel containing more nickel (310 and 316 grades) is more likely to remain non-magnetic after cold work.
All stainless steel is NOT necessarily non-magnetic
It is common for stainless to pick up iron ions from the die and tool used during the stamping process. Iron ions cause magnetism and later may cause minor rust. Our customers use our stainless products and it is very rare that there is a problem with rust unless their application is extremely caustic. If your application is extremely caustic you should require stainless steel that has gone through both the passivation and annealing processes. Passivation enhances the rust resistance of the stainless surface. The passivation process is not meant to completely restore non-magnetic property. It is only a relatively economic way to enhance corrosion resistance. The passivation process standard removes all ions. Annealing is the most effective way to restore non-magnetic property and enhance corrosion resistance. However, in this process if the stainless is not heat treated high enough and then cooled down slowly the corrosion resistance of the stainless steel will be reduced. Annealing stainless is almost cost prohibitive. When both processes are applied, passivation should be done after annealing.
