# Crown Packaging Technology, Inc. — Hazardous Materials Safety Interpretation **Citation:** 18-0006 **Type / status:** guidance / guidance **Agency:** Pipeline and Hazardous Materials Safety Administration **Effective:** Not stated **Published:** 2018-06-29 18-0006 response to Crown Packaging Technology, Inc. concerning 173.33, 178.33. ## Document text <<>> U.S. Department 1200 New Jersey Avenue, SE of Transportation Washington, DC 20590 Pipeline and Hazardous Materials Safety JUN 2 9 2018 Administration Mr. Jaime Suarez Advisory Engineer Crown Technology Crown Packaging Technology, Inc. 11535 South Central Avenue Alsip, IL 60803-3418 Reference No. 18-0006 Dear Mr. Suarez: This letter is in response to your January 5, 2018, email requesting clarification of the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180) applicable to the buckle ranges for a Department of Transportation (DOT) DOT 2P1. Specifically, you ask for confirmation of the buckle/burst pressure requirements of the DOT 2P1 aerosol container. The Pipeline and Hazardous Materials Safety Administration (PHMSA) issued a final rule on January 21, 2016 under Docket No. PHMSA-2013-0042 (HM-233F) requiring all standards for a DOT 2P1 to remain the same as those for a DOT 2P, except the DOT 2P1 must also comply with the variations prescribed in § 173.33c-2. For a DOT 2P1 to comply with § 178.33c-2, Variation 1, one container out of each lot of 25,000 containers or less, successively produced per day, complete with ends assembled (and without a pressure relief system assembled) must be pressure tested to destruction at gauge pressure and must not burst below 240 psig. The lot must be rejected if containers with a pressure relief system described in § 178.33c-2(a) and assembled show failure at a location other than the pressure relief system. For those containers with an end expansion device, the lot must also be rejected if the container bursts prior to buckling of the device. You note how the buckle ranges for DOT 2P1 in § 178.33c-2 differ from those prescribed in DOT Special Permit (SP) 7951. DOT-SP 7951 specifies that one out of each case lot of 10,000 cylinders or less that comply with this special permit must be pressure tested to destruction. The entire lot must be rejected if failure occurs at pressure below 175 psig and over 210 psig, or failure occurs at other than the rim-venting release device or dome expansion device. PHMSA chose to adopt the modified DOT 2P container design prescribed in DOT-SP 13601, which complies with the DOT 2P container and variations prescribed in § 178,,33c-2, as the new DOT 2P1 design. In the HM-233F final rule, PHMSA states the reasons for this are: <<>> • PHMSA found DOT-SPs 7951, 13601, and 14503, which authorized modified pecific information on the relationship between each aerosol's functional range an nanufacturing and testing requirements for packagings similar to DOT 2P, lacke tested burst pressure. • PHMSA found DOT-SPs 7951 and 14503 established a standard for content pressure for which there was no HMR equivalent. • The relief system functioning ranges in these packagings have a higher upper bound and no minimum burst pressure other than those prescribed for a DOT 2P. I hope this information is helpful. Please contact us if we can be of further assistance. Sincerely, T. Glenn Foster Chief, Regulatory Review and Reinvention Branch Standards and Rulemaking Division <<>> Edmonson § 178.33c-2 A erosal: Dodd, Alice (PHMSA) 18-0006 From: INFOCNTR (PHMSA) Sent: To: Thursday, January 11, 2018 3:40 PM Hazmat Interps Subject: FW: Clarification of Aerosol DOT 2P1 Buckle/Burst Requirements Hello All, This is an interp request from Jaime Suarez. I reached out to him last week to get some clarifying answers and he spoke to someone today in the INFOCNTR. We directed him to 178.33c-2 and HM-233F for his question. He would still like to have written guidance on his mentioned cylinders. Regards, -Breanna From: Suarez, Jaime [mailto:Jaime.Suarez@crowncork.com] Sent: Friday, January 05, 2018 5:12 PM To: INFOCNTR (PHMSA) Cc: McFadden, Douglas < douglas.mcfadden@crowncork.com> Subject: RE: Clarification of Aerosol DOT 2P1 Buckle/Burst Requirements I am following up on a call I had earlier with the PHMSA-Hazardous Materials information line. DOT 2P1 rating was the consolidation of food stuff SPs (specifically SP 7951), in which specific buckle ranges were included as a requirement. In reviewing the DOT 2P1, there no longer appears to be specific ranges, and DOT 2P1 appears to follow the same buckle/burst requirements as DOT 2P. The information line confirmed that there are no different buckle/burst requirements included in the CFR. I would like to request a written interpretation letter to confirm the buckle/burst requirements of the DOT 2P1 rating. Please let me know if further information is required to process my request. Regards, Jaime Suarez Advisory Engineer | CROWN Technology Crown Packaging Technology Inc., 11535 S. Central Avenue, 60803-3418, Alsip, IL | United States T: +1 708 239 5328 | www.crowncork.com CONFIDENTIALITY NOTICE The information contained in this e-mail is intended only for the confidential use of the above named recipient. 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Thank you. 1 ## Provenance - Official: Yes - Source: - Source ID: `phmsa` - SHA-256: `8d80b995e7e03be242e6b91508fce6127c4322afda05ab6bc3d32e27a1e2dd26` - Retrieved: 2026-08-20T00:59:31.977Z - Exported: 2026-08-23T02:27:43.184Z - Document slug: `phmsa-interpretation-18-0006` ### Source metadata ```json { "materialSubtype": "interpretation", "interpretationArea": "hazardous_materials", "representation": "full_text_from_official_pdf", "companies": [ "Crown Packaging Technology, Inc." ], "individuals": [ "Jaime Suarez" ], "refIds": [ "18-0006" ], "catalogDates": [ "2018-06-29" ], "catalogParts": [ 173, 178 ], "catalogRowCount": 2, "sourceRecordUrls": [ "https://www.phmsa.dot.gov/node/70606" ], "linkedAttachmentUrls": [], "unavailableResponseUrls": [], "duplicateRepresentationUrls": [], "citedSections": [ "173.33", "178.33", "173.33c", "178.33c" ], "catalogPageUrls": [ "https://www.phmsa.dot.gov/regulations/title49/section/17333", "https://www.phmsa.dot.gov/regulations/title49/section/17833" ], "pdfUrls": [ "https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/docs/standards-rulemaking/hazmat/interpretations/58651/180006.pdf" ], "representations": [ { "viewUrl": "https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/docs/standards-rulemaking/hazmat/interpretations/58651/180006.pdf", "detailUrl": null, "detailHtmlPath": null, "pdfUrl": "https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/docs/standards-rulemaking/hazmat/interpretations/58651/180006.pdf", "pdfArtifactPath": "data/sources/phmsa-interpretations/18-0006-d1246a423c.pdf", "pdfArtifactSha256": "1b42196fabfe2fdb79c84cff774286236c5cf8df0e7ef0417dba177b0406d554", "extractedTextPath": "data/sources/phmsa-interpretations/18-0006-d1246a423c.v2.txt", "extractedTextSha256": "449a6285559313bfc29b5af78edb1686b67d3a596135cdb9e437b350976b4b93", "pageCount": 3, "extractionVersion": 2 } ], "caveat": "Interpretations apply regulations to the facts presented and do not create independently enforceable requirements.", "jurisdiction": "US" } ```