{"abstract":"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.","action":"Notice of proposed rulemaking (NPRM).","agencies":[{"raw_name":"DEPARTMENT OF TRANSPORTATION","name":"Transportation Department","id":492,"url":"https://www.federalregister.gov/agencies/transportation-department","json_url":"https://www.federalregister.gov/api/v1/agencies/492","parent_id":null,"slug":"transportation-department"},{"raw_name":"Research and Special Programs Administration","name":"Research and Special Programs Administration","id":451,"url":"https://www.federalregister.gov/agencies/research-and-special-programs-administration","json_url":"https://www.federalregister.gov/api/v1/agencies/451","parent_id":492,"slug":"research-and-special-programs-administration"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2003/09/10/03-22808.html","cfr_references":[{"chapter":null,"citation_url":null,"part":171,"title":49},{"chapter":null,"citation_url":null,"part":173,"title":49},{"chapter":null,"citation_url":null,"part":180,"title":49}],"citation":"68 FR 53314","comment_url":null,"comments_close_on":"2003-11-10","correction_of":null,"corrections":[],"dates":"Comments must be received by November 10, 2003.","disposition_notes":null,"docket_ids":["Docket No. RSPA-03-14405 (HM-220F)"],"dockets":[],"document_number":"03-22808","effective_on":null,"end_page":53320,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2003/09/10/03-22808.xml","html_url":"https://www.federalregister.gov/documents/2003/09/10/03-22808/hazardous-materials-regulations-aluminum-cylinders-manufactured-of-aluminum-alloy-6351-t6-used-in","images":{"EP10SE03.000":{"large":"https://img.federalregister.gov/EP10SE03.000/EP10SE03.000_large.png","medium":"https://img.federalregister.gov/EP10SE03.000/EP10SE03.000_medium.png","original_size":"https://img.federalregister.gov/EP10SE03.000/EP10SE03.000_original_size.png"}},"images_metadata":{"EP10SE03.000":{"large":{"identifier":"EP10SE03.000","content_type":"image/png","size":1333,"width":356,"sha":"d40eca9d364ed5f3f253c21b2ce8d023","url":"https://img.federalregister.gov/EP10SE03.000/EP10SE03.000_large.png","height":155},"medium":{"identifier":"EP10SE03.000","content_type":"image/png","size":577,"width":168,"sha":"bcd61177158d321a5a0306252425e883","url":"https://img.federalregister.gov/EP10SE03.000/EP10SE03.000_medium.png","height":73},"original_size":{"identifier":"EP10SE03.000","content_type":"image/png","size":3143,"width":1266,"sha":"0c7c21f959014c458fc623aabee55e9f","url":"https://img.federalregister.gov/EP10SE03.000/EP10SE03.000_original_size.png","height":550}}},"json_url":"https://www.federalregister.gov/api/v1/documents/03-22808?publication_date=2003-09-10","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2003-09-10/03-22808/mods.xml","not_received_for_publication":null,"page_length":7,"page_views":{"count":590,"last_updated":"2026-04-04 16:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2003-09-10/pdf/03-22808.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2003-09-10","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2003/09/10/03-22808.txt","regulation_id_number_info":{"2137-AD78":{"issue":"200404","html_url":"https://www.federalregister.gov/regulations/2137-AD78/hazardous-materials-regulations-aluminum-cylinders-revised-requalification-and-use-criteria-for-the-","title":"Hazardous Materials Regulations: Aluminum Cylinders--Revised Requalification and Use Criteria for the DOT 3 AL Cylinder Made of Aluminum Alloy 6351-TG","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=200404&RIN=2137-AD78&operation=OPERATION_EXPORT_XML","priority_category":"Substantive, Nonsignificant"}},"regulation_id_numbers":["2137-AD78"],"regulations_dot_gov_info":{},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":53314,"subtype":null,"title":"Hazardous Materials Regulations: Aluminum Cylinders Manufactured of Aluminum Alloy 6351-T6 Used in SCUBA, SCBA, and Oxygen Service-Revised Requalification and Use Criteria","toc_doc":"Aluminum cylinders manufactured of 6351-T6 aluminum alloy used in SCUBA, SCBA, and oxygen services;  requalification and use criteria","toc_subject":"Hazardous materials:","topics":["Exports","Hazardous materials transportation","Hazardous waste","Imports","Incorporation by reference","Motor vehicle safety","Packaging and containers","Radioactive materials","Reporting and recordkeeping requirements","Uranium"],"type":"Proposed Rule","volume":68}