1. The haak used in the lifting mechanism driven by manpower is tested with 1.5 times the rated load as the inspection load.
2. The haak used for the power-driven lifting mechanism shall be tested with 2 times the rated load as the inspection load.
3. Na diehaakuit die inspeksielas verwyder word, moet daar geen ooglopende gebreke of vervorming wees nie, en die toename in die opening moet nie meer as 0,25% van die oorspronklike grootte wees nie.
4. Virhaaks that have passed the inspection, a mark should be printed in the low-stress area of the haak, including the rated lifting weight, factory mark or factory name, inspection mark, production number, etc.
Diehaakmoet geskrap word wanneer een van die volgende situasies voorkom:
â ‘Kraak;
â Gevaarlike slytasie bereik 10% van die oorspronklike grootte;
â '¢ Die openingsgraad word met 15% verhoog in vergelyking met die oorspronklike grootte;
④The torsion deformation of the haak body exceeds 10°;
⑤The dangerous section of the haak or the neck of the haak is plastically deformed;
⑥The haak thread is corroded;
⑦When the wear of the haak bushing reaches 50% of the original size, the bushing should be replaced;
⑧ Wanneer die deur van die stukhaaktot 5% van die oorspronklike grootte gedra word, moet die deur vervang word.