What are the regulations on sling manufacturing materials?

　　The materials used in the manufacture of slings and rigging and the purchased parts and components must have the material list, the manufacturer's certificate and other technical certification documents. Otherwise, it should be checked to find out that the performance is stable and reliable before use.

　　What are the requirements of load test for spreaders and rigging?

　　The slings and rigging manufactured, reformed, repaired or newly purchased shall be put into use on the basis of no-load operation and passing test, and shall be tested according to the specified test load and passing test before being put into use.

　　Static load test load:

　　The spreader shall be 1.25 times the rated lifting weight.

　　The crane requires two times the rated working load of single limb and split limb.

　　Test method: The test load should be added one by one, lifted to a height of 100-200mm from the ground, and the hanging time should not be less than 10min. Perform a visual inspection after unloading. When the test is repeated for three times, if the structure does not crack, deformation, and the connection is abnormally loose or damaged, it is considered that the static load test is qualified.

　　Dynamic load test load:

　　1.1 times the rated lifting weight (lifting electromagnet to rated lifting weight mass).

　　The suspension requires 1.25 times the rated working load of single limb and split limb.

　　Test method: During the test, the acceleration, deceleration and speed must be limited to the normal working range of the sling and work continuously for 1h according to the actual working cycle. If the indicators, the limit switch and the protection device are accurate, the structural components are not damaged, and the parameters meet the requirements of the technical performance indicators, the dynamic load test is considered to be qualified.

　　What are the rules for the use of lifting gear and rigging:

　　(1) The sling and rigging should be adapted to the type of goods being lifted, environmental conditions and specific requirements.

　　2, the lifting and rigging should be checked before operation, and when it is confirmed that the functions are normal and intact, it will be put into use.

　　3, before hanging, should first confirm the heavy object set on the heavy object hanging connection is firm and reliable.

　　4, the lifting operation should be confirmed before the lashing, hanging is reliable.

　　5, the sling shall not exceed its rated lifting mass, the sling shall not exceed its rated working load factor.

　　6, in the process of operation shall not damage the lifting goods and lifting gear, rigging, if necessary, should be in the lifting goods and lifting gear, rigging between the protective liner.

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