Foarsoarchsmaatregels foar it feilich brûken fan haken

1. Deheak should be manufactured by a formal professional factory in accordance with the technical conditions and safety specifications of the heak, and the product should have the quality certificate of the manufacturer, otherwise it is not allowed to be used.
2. The new heak should be subjected to a load test, and the opening of the measuring heak should not exceed 0.25% of the original opening.
3.During use, check whether the heak is cracked or severely deformed, corroded and worn.
4. Deheakmoat ien kear yn 't jier wurde hifke. Tidens de test, fiere in statyske test fan 1.25 kear de tastiene wurkbelesting foar 10 minuten, en kontrolearje mei in fergrutglês as oare metoaden. D'r moatte gjin barsten, barsten en restdeformaasje wêze.
5. De trije gefaarlike seksjes moatte wurde skjinmakke mei kerosine. Brûk in fergrutglês om te sjen oft d'r skuorren binne. Foar plaatheaks, kontrolearje de bushings en pins foar wear.
6. Defects on the heak shall not be repaired.