Chains for cargo securing and lifting
Chains are available in different grades and standards where the choice most often is based on the area of use. The most common standards are DIN and SMS as well as G80 and G100. It is important to handle the chains correctly and to regularly inspect deformation, wear and other risks for breakage.
To consider when handling chains:
- Only use a classified chain for lifting and cargo securing. Never lift with a twisted chain.
- Use shortening hook when adjusting the length of the chain.
- Knots may not occur on the chain.
- Protect against sharp corners by using suitable shims.
- Chains must not be exposed to excessive heat.
- Avoid jerks when applying load to a chain.
- Never apply the load at the tip of a hook. The load should always be at the bottom of the hook.
- The different components should always be able to move freely in the direction of the load
Check this regularly:
- The chain must be replaced when signs of permanent elongation, deformation or cracks occurs.
- The wear on the chain measured in two perpendicular directions may amount to a maximum of 10% of the original size.
- For additional information, see applicable standards and norms.
Chemicals:
Chains in Grade 80 and Grade 100 must not be us ed in contact with acids or other aggressive chemicals. The device must not be exposed to galvanizing.
| Chain Grade | Finish | Type | Usage area |
|---|---|---|---|
| 20 * | Zink plated Stainless |
KL HL LL |
Farming,securing, other |
| 80 | Black | KL LL |
Lifting equipment, lashing |
| 100 | Blue | KL | Lifting equipment, lashings |
* Hot dip galvanized G20 is sometimes also called Commercial chain
Definitions:
Test force (MPF)
The force with which an equipment or component, which is going to be tested, is tested with before delivery. The force varies depending on the product and the controlling standard and is usually 1.25-2.5 times higher than the maximum working load (WLL).
Breaking force (MBF)
The force at which the chain breaks during destructive testing.
The total elongation
Measurement of total increased length of the material when breaking, expressed in % .
Maximum load
Maximal work load of the product.
Safety factor (SF)
The relation between breaking force and maximum work load for a material.
