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The inspection frequency of crane hooks should be determined according to the use environment, frequency and relevant national standards or industry specifications. The following are general inspection cycles and recommendations:

1. Daily inspection (before each use or before each shift)

• Visual inspection : Check the hook surface for cracks, deformation, wear or rust.

• Rotating parts : ensure that the hook can rotate flexibly without jamming.

• Safety device : Check whether the anti-unhooking device (if any) is intact and effective.

2. Regular inspection (according to the frequency of use)

• Frequent use (such as daily use) :

  • Weekly inspection : A professional will conduct a more detailed inspection, including measuring the opening, amount of wear, etc.

  • Monthly inspection : Use magnetic particle inspection or ultrasonic testing to detect potential cracks (especially in high-risk environments).

• General Use :

  • Every 1 to 3 months : A comprehensive inspection by certified personnel will be carried out and records will be archived.

3. Mandatory periodic inspection (according to national standards)

• China's Safety Regulations for Lifting Machinery (GB/T 6067.1-2010) :

  • At least once a year : comprehensive inspection (including non-destructive testing) performed by a professional organization or certified personnel.

  • Special environments (such as high temperature, corrosion, high frequency use): may be shortened to every 6 months.

• European and American standards (such as ISO 4309, OSHA) :

  • It is recommended to carry out professional inspection every 12 months, and more frequently in high-risk conditions.

4. Inspection in special circumstances

• After abnormal events : such as overloading, collision, falling, etc., the machine must be immediately deactivated and inspected.

• Restart after idleness : Re-inspection is required after long-term inactivity (more than 3 months).

Precautions

• Record archiving : All inspection results must be recorded in writing and kept for at least 2 years.

• Scrap criteria : If cracks are found, the opening increases by 15%, or the wear exceeds the original size by 10%, it must be replaced.

• Regulations take precedence : The specific cycle must comply with local regulations or manufacturer requirements.

It is recommended to refer to the equipment manual or consult the local safety regulatory department to ensure compliance. Safety first, do not ignore inspections in order to save costs!