- Part Number:1919
- Part Number Title:Gear Certification
- Subpart:1919 Subpart D
- Subpart Title:Certification of Vessels' Cargo Gear
- Standard Number:
- Title:Heat treatment.
- GPO Source:
All chains (other than bridle chains attached to derricks or masts), rings, hooks, shackles, and swivels made of wrought iron, which are used in hoisting or lowering, shall be annealed in accordance with § 1919.36 at the following intervals:
When used in this paragraph, the term "in general use"means used on fifty-two or more days in a year. In any case, however, the period between annealings shall not exceed two years.
Chains, rings, hooks, shackles, and swivels made of material other than wrought iron or steel shall be heat treated when necessary in accordance with § 1919.36(b).