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Information on DOT Specification 3AL Cylinders
The following report and notices cover current safety issues and testing recommendations related to high pressure aluminum and aluminum composite hoop-wrapped cylinders made of the 6351-T6 aluminum alloy.
Reports
- Nondestructive Inspection of High Pressure Aluminum Gas Cylinders
- Federal Register Notices & Rules
- Advisory: Aluminum Cylinders made of Aluminum Alloy 6351-T6 (pdf - 10K)
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PHMSA-01-10373 (HM-220D); Hazardous Materials: Requirements for Maintenance, Requalification, Repair and Use
of DOT Specification Cylinders; Extension of Compliance Dates and Corrections; Final rule; extension of compliance
dates and corrections; Published 09/30/2002; Effective Date: October 1, 2002; 67 FR 61287.
- PHMSA-99-5143; Notice No. 99-11; TITLE: "Safety Advisory; High Pressure Aluminum Seamless and
Aluminum Composite Hoop-Wrapped Cylinders"; Safety advisory notice correction; Published 11/1/99; 64 FR 58906.
- PHMSA-99-5143; Notice No. 99-11; TITLE: "Safety Advisory; High Pressure Aluminum Seamless and
Aluminum Composite Hoop-Wrapped Cylinders"; Safety advisory notice; Published 10/18/99; 64 FR 56243.
- Notice No. 98-12; TITLE: "Safety Advisory; High Pressure Composite Cylinders";
Safety advisory notice; Published 12/14/98; 63 FR 68819.
- Supplemental information regarding Notice 99-11 (pdf - 6K)
- Notice No. 94-7; Safety Advisory; High Pressure Aluminum Seamless and
Aluminum Composite Hoop-Wrapped Cylinders; Safety advisory notice; Published 07/26/94; 59 FR 38028.
- Notice No. 83-8;High Pressure Composite Hoop Wrapped Cylinders (4500 p.s.i.g. Marked Service Pressure;
DOT-E 7235); Safety advisory notice; Published 03/24/93; 58 FR 15895.
- HM-176A; DOT 3AL Aluminum Cylinders; Safety Problems; Safety advisory and advance notice of proposed rulemaking;
Published 07/10/87; 52 FR 26027.
- Notice No. 85-4;High Pressure Composite Hoop Wrapped Cylinders 4500 p.s.i.g. Marked Service Pressure;
DOT-E 7235, Exemption related notice; Published 08/15/85; 50 FR 32944.
- Notice No. 85-3;High Pressure Composite Hoop Wrapped Cylinders 4500 p.s.i.g. Marked Service;
DOT-E 7235 Exemption related notice; Published 07/17/85; 50 FR 29038.
- DOT-E 7235: High Pressure Composite, Hoop Wrapped Cylinders 4500 PSIG Marked Service Pressure;
Published 11/01/1984; 49 FR 44047.
- DOT-E 7235: Limit on Filling Pressure for High Pressure Composite Hoop Wrapped Cylinders Authorized by Exemption;
Published 02/27/1984; 49 FR 7182.
- High Pressure Composite Hoop Wrapped Cylinders (4500 PSIG Marked Service Pressure; DOT E-7235;
Product Recall; Published 08/11/1983; 48 FR 36559.
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