# Regulus search export

- Query: `71 FR 51122`
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- Exported: 2026-08-25T08:31:09.849Z

## 1. Hazardous Materials: Aluminum Cylinders Manufactured of Aluminum Alloy 6351-T6 Used in SCUBA, SCBA, and Oxygen Services-Revised Requalification and Use Criteria

**Citation:** 71 FR 51122  
**Type / status:** rulemaking / historical  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective / published:** 2007-01-01 / 2006-08-29

This final rule revises the Hazardous Materials Regulations to address a known safety problem with cylinders manufactured of aluminum alloy 6351-T6. The revisions include an inspection and testing program for early detection of sustained load cracking on cylinders manufactured of aluminum alloy 6351-T6 and used in self-contained underwater breathing apparatus (SCUBA), self-contained breathing apparatus (SCBA), and oxygen services.

### Provenance

- Official: Yes
- Source: <https://www.federalregister.gov/documents/2006/08/29/E6-14255/hazardous-materials-aluminum-cylinders-manufactured-of-aluminum-alloy-6351-t6-used-in-scuba-scba-and>
- Source ID: `federal-register`
- SHA-256: `e225c3d35e50408f3a295578f3e7a2374247223a8c860b4e93f6b2377a9a7e41`
- Retrieved: 2026-08-20T06:04:51.294Z
- Document slug: `federal-register-e6-14255`
- Related records: 7