Crane inspection is to determine whether the crane and its components are still guaranteed to work safely and meet the standards or not.

Crane inspection problems

Why inspect the crane?

– Firstly: as mentioned above, crane is one of the equipment with strict requirements on jib safety and hygiene. Therefore, we need to verify the crane.

– Second: to ensure safety for people as well as avoid damage to facilities for businesses.

– Third: approve the inspection process, detect the damage, need to fix, thereby improving the working productivity of the crane.

Notes when conducting crane inspection

– Before performing the crane inspection process: it is necessary to have a combination of the unit using and managing the crane with the inspector. It is necessary to follow the recommendations of the inspectors in order to ensure that the inspection takes place according to the correct process and ensures safety during the inspection. If there are errors in the preparation and detection of defects that may make the test unsafe, the inspectors have the right to refuse to conduct the review and test according to the regulations.

– So, after detecting the damage, as well as other related problems, without reviewing and testing the crane, it is necessary to carry out remedial, replacement, repair, this work is done by the unit. , manage the crane in charge. And then will proceed to check the crane.

– When an accident related to the crane occurs: the unit using the equipment needs to immediately notify the competent authority to review that equipment.

Types of crane inspection

– First test: the practice period is before putting into use, including:

• - Review in assembly, both externally and internally.
• - Static load test (125% working load)
• - Dynamic load test (110% of working load)

– Periodic inspection: the practice period is after the expiration of the previous inspection process. Consists of:

• - Check, look inside and outside
  - Static load test (125% working load)
  - Dynamic load test (110% of working load)

– Erratic inspection: the practice period is after the repair, refit or replacement of parts, or after their conversion (moving to a new working location), or after the repair after an accident . The review practice process includes:

• - Review, consider assembly accuracy, external, internal.
  - Static load test (125% working load)
  - Dynamic load test (110% of working load)

Test procedures and standards for crane testing

Crane inspection is carried out according to the following steps:

• - Check the device's profile and history.
  - External check.
  - Technical test- Try no load.
  - Load test modes- Test method.
  - Processing test results.

Standards used for crane inspection

• - TCVN 4244-2005: Lifting equipment design, manufacture and technical review.

  - TCVN 4755-1989: Cranes - Safety recommendations for hydraulic equipment.

  - TCVN 5206-1990: Lifting machines - safety recommendations for counterweights and stabilizers.

  - TCVN 5207-1990: Lifting machines – general safety recommendations.

  - TCVN 5209-1990: Lifting machines – safety recommendations for electrical equipment.

  TCVN 5179-90: Lifting machines - hydraulic test recommendations for safety.

Regulations to ensure safety for people and equipment

Crane inspection problems

1. Only those who have passed training classes with a certificate of crane driving and have received safety instructions are allowed to operate the crane. Prohibit unauthorized persons without operating certificates from operating cranes.

2. Before operating the crane, the safety devices must be checked: control mechanism, brake, ... Only when ensuring safety can be operated. If irregularities are detected, they must immediately notify the repair unit to repair and the responsible person to know. After the renovation is completed, the new operation can be continued. Before operating, must use signals to notify people around.

3. While operating the crane, it must be handled carefully, paying attention to the properties of the lifting object to ensure proper balance when moving and placing the load.

4. The operator is not allowed to leave the position when the crane is working, not to receive guests in the cabin.

5. Do not exceed the allowable load of the device, do not lift an object when its load is unknown (lifting objects that are attached to other objects...).

6. Before lifting the load to the limit of the load, the load must be lifted to a height not greater than 300mm, holding the load to check the brakes, the strength of the metal structure and the stability of the crane. If it is not safe, download it for processing. If it is safe, the crane can be picked up.

7. The process of the rope moving through the pulley must be observed to control the crane so that the cables do not twist or overlap.

8. When lifting the object, it must be hoisted in the vertical direction, not when the cable is in the inclined position.

9. Prohibit the use of automatic stopping parts to stop the machine instead of control switches.

10. When loading and unloading goods on the truck floor by crane, do not let workers tie the load hook on the floor when lifting and lifting the crane through the driver's room.

11. If when operating the crane, it is detected that someone approaches the suspended load, it must signal them to stay away or steer the crane away from that person if possible.

12. Do not allow maintenance and repair people on the crane while the crane is working.
At the end of the shift, the levers must be returned to the closed position, record in the operating log the operating status of the equipment during the shift, and then lock the control room. If necessary, immediately notify the person in charge of management.

Note: it is necessary to inspect the crane so that there are solutions to overcome as well as improve the working efficiency of the crane.

Safety recommendations for hooks:

Crafting materials: the shape and construction of the hook is chosen to ensure the smallest size (especially height) and minimum weight with uniform strength in all its sections. In the crane industry, many types of hook structures are used: single hook, double hook, etc.

The hook must be made by forging or stamping. It is possible to make hooks from separate sheets of steel linked together by rivets. Casting is allowed if the manufacturer is capable of detecting casting defects and authorized by the local safety engineering agency.

Hooks with loads of 30,000N or more must have a rotatable construction on enclosed, enclosed ball bearings, except for those of specialized lifting equipment.

Mounting the forging hooks, stamping hooks, forks of the plate hook on the crossbar must eliminate the possibility of self-loosening of the nut. Lifting equipment load hooks shall be provided with a safety lock that prevents the possibility of falling of additional load-carrying parts, with the exception of the hooks of the following lifting appliances:

• - Gantry cranes work in seaports.

  - The shaft is used to move molten metal or liquid slag.
  - Hooks must be removed in the following cases:
  - The hook cannot rotate.
  - The hook is broken.
  - The hook is worn by more than 10% of its original size.
  - The hook is deformed by fatigue or by impact.

Please contact us for more details:

Quang Trung INDUSTRIAL GROUP JOINT STOCK COMPANY

Representative office address at: Lot 33 Villa 4 Linh Dam Peninsula Hoang Mai, Hanoi

Phone: 0379645086

Email: tapdoanquangtrunggroup@gmail.com