# Regulus search export - Query: `70 FR 61762` - Source type: All - Part: All - Source: All - Status: All - Jurisdiction: All - Collection: All - Incident class: All - Sort: relevance - Date from: Any - Date to: Any - As of: Current corpus - Results: 1 - Exported: 2026-08-23T21:04:12.042Z ## 1. Hazardous Materials Regulations: Aluminum Cylinders Manufactured of Aluminum Alloy 6351-T6 Used in SCUBA, SCBA, Carbon Dioxide, and Oxygen Service-Revised Requalification and Use Criteria **Citation:** 70 FR 61762 **Type / status:** rulemaking / proposed **Agency:** Pipeline and Hazardous Materials Safety Administration **Effective / published:** Not stated / 2005-10-26 On September 10, 2003, the Research and Special Programs Administration--the predecessor agency to the Pipeline and Hazardous Materials Safety Administration published a notice of proposed rulemaking (NPRM) to propose an inspection and testing program for early detection of sustained load cracking in certain cylinders manufactured with aluminum alloy 6351-T6. Based on comments received in response to that NPRM, we are proposing to adopt a maximum service life for cylinders manufactured with aluminum alloy 6351-T6 and to prohibit the use of these cylinders after the expiration of their maximum service life. ### Provenance - Official: Yes - Source: - Source ID: `federal-register` - SHA-256: `fc29244ef3e10f9fd78a6b9a526a75f1424185e3310002be73a92c784fd9363c` - Retrieved: 2026-08-20T06:04:51.294Z - Document slug: `federal-register-05-21273` - Related records: 8