# Regulus search export

- Query: `68 FR 53314`
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- Exported: 2026-08-24T22:17:07.915Z

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

**Citation:** 68 FR 53314  
**Type / status:** rulemaking / proposed  
**Agency:** Research and Special Programs Administration  
**Effective / published:** Not stated / 2003-09-10

RSPA proposes to amend requirements in the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180) pertaining to aluminum cylinders manufactured using aluminum alloy 6351-T6. The purpose of this rulemaking initiative is to enhance safety, minimize the potential for personal injury and property damage during the cylinder filling process, and adopt a standard for early detection of sustained load cracking (SLC) to reduce the risk of a cylinder rupture.

### Provenance

- Official: Yes
- Source: <https://www.federalregister.gov/documents/2003/09/10/03-22808/hazardous-materials-regulations-aluminum-cylinders-manufactured-of-aluminum-alloy-6351-t6-used-in>
- Source ID: `federal-register`
- SHA-256: `0ec93aa23d8ae976fb9ffa929d9e1a704b5e396e9e9c6a60d2f50b5c72a761a4`
- Retrieved: 2026-08-20T06:04:51.294Z
- Document slug: `federal-register-03-22808`
- Related records: 8