DOT-3AL cylinders manufactured of 6351-T6 aluminum alloy
For DOT-3AL cylinders manufactured of 6351-T6 aluminum alloy, test or inspection is requalified and inspected for sustained load cracking; condition or service qualifier is used in self-contained underwater breathing apparatus (SCUBA), self-contained breathing apparatus (SCBA), or oxygen service; regulation section is 49 CFR § 180.209, recorded from its source on 2026-08-06.
- Container specification
- DOT-3AL cylinders manufactured of 6351-T6 aluminum alloy verified
- Test or inspection
- requalified and inspected for sustained load cracking our reading
- Condition or service qualifier
- used in self-contained underwater breathing apparatus (SCUBA), self-contained breathing apparatus (SCBA), or oxygen service verified
- Regulation section
- 49 CFR § 180.209 verified
Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.
What the source says
DOT-3AL cylinders manufactured of 6351-T6 aluminum alloy. In addition to the periodic requalification and marking described in <https://www.law.cornell.edu/cfr/text/49/180.205> § 180.205 , each cylinder manufactured of aluminum alloy 6351-T6 used in self-contained underwater breathing apparatus (SCUBA), self-contained breathing apparatus (SCBA), or oxygen service must be requalified and inspected for sustained load cracking in accordance with the non-destructive examination method described in the following table.
— law.cornell.edu, retrieved 2026-08-06
Source
- law.cornell.eduhttps://www.law.cornell.edu/cfr/text/49/180.209