# Chemical Products Group — Hazardous Materials Safety Interpretation **Citation:** 00-0102 **Type / status:** guidance / guidance **Agency:** Pipeline and Hazardous Materials Safety Administration **Effective:** Not stated **Published:** 2000-05-16 00-0102 response to Chemical Products Group concerning 173.227. ## Document text <<>> Washington, D.C. 400 Seventh Street, S.W. 20590 Research and Administrations MAY 16 2000 Ms. Joyce Stratis FMC Corporation Ref. No: 00-0102 Chemical Products Group 1735 Market Street Philadelphia, PA 19103 Dear Ms. Stratis: This is in response to your letter of April 12, 2000, requesting clarification on the packaging requirements for materials poisonous by inhalation under the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180). The packaging requirements of § 173.227(b)(ii) state that the closure must be physically held in place by any means capable of preventing back-off or loosening of the closure by impact or vibration during transportation. You ask whether using a bead of silicone caulk around the bung closure meets the provisions of § 173.227(b)(ii). The means you have described for physically holding a bung closure in place is acceptable. I hope this information is helpful. Sincerely, Delmer F. Billings Chief, Standards Development Office of Hazardous Materials Standards 173.22, 166ii" 000102 <<>> APR 12 '00 09:09 FR IU 8120250b5012 r.02104 FMC Corporation REVISED LETTER & REQUEST FMIC April 12, 2000 Mr. Edward T. Mazzullo Director, Office of Hazardous Materials Standards Research and Special Programs Administration (DHM10) U.S. Department of Transportation 400 Seventh Street, S.W. Washington, DC 20590-0001 RE: EMERGENCY REQUEST FOR INTERPRETATION & GUIDANCE - PENDING ENFORCEMENT ACTION Dear Mr. Mazzullo: We are requesting an interpretation of the intent of 49 CFR 173.227 (b) (2) on an emergency basis. This involves drum shipments of PIH materials. We are ceasing shipment of these drums until we are compliant with DOT regulations and need direction to ensure that we are following the intent of the regulations and that these shipments are not interrupted for a lengthy period of time. On April 4, 2000, Mr. Chris Michalski, Hazardous Materials Enforcement Specialist visited the Nitro, WV plant of Great Lakes Chemical Corporation (formerly FMC Corporation). Although the facility in Nitro, WW is now owned by Great Lakes Chemicals, FMC still owns the Phosphorus Trichloride (6.1 (8) - UN 1809 - PG I - Hazard Zone B) and Phosphorus Oxychloride ( 8 (6.1) - UN 1810 - PG |1 - Hazard Zone B) produced at the facility. Great Lakes acts as a toller for FMC Corporation relative to these materials. Mr. Michalski found the following issues with our 1A1 Steel drums (used for Phosphorus Trichloride) and our 1H1 Plastic drums (used for Phosphorus Oxychloride): <<>> APR 12 'Ø0 09:09 FR TO 812023663012 P.03/Ø4 • : The plant did not pussess the closure instructions from the drum The plant was not using torque wrenches to tighten the drum bungs manufacturer • Questioned whether our cap seals were capable of holding an internal pressure of 15 psig • The bungs were not held in place by a positive means to prevent backing off or loosening due to impact or vibration during transit Our Plant is obtaining appropriate closure instructions from the manufacturer, will use torque wrenches to the appropriate torque specified by the manufacturer and is obtaining documentation from our cap seal vendor that it is capable of withstanding an internal pressure of at least 15 psig, all per 49 CFR 173.227 (b) (2). We are not certain, however, how to ensure that the closures are physically held in place by any means capable of preventing back-off or loosening of the closure by impact or vibration during transportation. We contacted both drum manufacturers (Russell Stanley and Republic Steel) as well as Rieke (fittings manufacturer) and they could not provide us with an appropriate means of physically holding the closures in place. We also contacted others in our industry and requested their methods and they also could not provide us with options since they were not physically holding closures in place. In a previous request to the DOT for interpretation/guidance, we proposed using tape as a means of physically holding the closures in place. We have since revised our thinking. We feel that using a bead of silicone caulk around the bung closure, which will then be subsequently covered by the cap seal, will ensure that closures are physically held in place and prevent back-off or loosening of these closures by either impact or vibration in transit. We also believe that by following the appropriate drum closure instructions provided by the manufacturers, using torque wrenches to the prescribed torque and ensuring the cap seals can withstand at least an shipping these drums for many vears with no transportation incident nternal pressure of 15 psig would ensure proper closure. We have beer relative to these non-bulk shipments. I respectfully request the DOT's guidance relative to the above situation. <<>> We wish to be in compliance and need this help as soon as possible to avoid further delay of our shipments. Very truly yours. Manager, Hazardous Materials FMC Corporation 1735 Market Street Philadelphia, PA 19103 (215) 299-6265 ** TOTAL PAGE.04 ** ## Provenance - Official: Yes - Source: - Source ID: `phmsa` - SHA-256: `d2b31a1a867c6bc285b0e0397d2b251d14e3741bd19478c5c7b3cc9add1a85f8` - Retrieved: 2026-08-20T00:59:31.977Z - Exported: 2026-08-23T23:41:14.949Z - Document slug: `phmsa-interpretation-00-0102` ### Source metadata ```json { "materialSubtype": "interpretation", "interpretationArea": "hazardous_materials", "representation": "full_text_from_official_pdf", "companies": [ "Chemical Products Group" ], "individuals": [ "Ms. Joyce Stratis" ], "refIds": [ "00-0102" ], "catalogDates": [ "2000-05-16" ], "catalogParts": [ 173 ], "catalogRowCount": 1, "sourceRecordUrls": [ "https://www.phmsa.dot.gov/node/46281" ], "linkedAttachmentUrls": [], "unavailableResponseUrls": [], "duplicateRepresentationUrls": [], "citedSections": [ "173.227", "173.227(b)(ii)", "173.22" ], "catalogPageUrls": [ "https://www.phmsa.dot.gov/regulations/title49/section/173227" ], "pdfUrls": [ "https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2000/000102.pdf" ], "representations": [ { "viewUrl": "https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2000/000102.pdf", "detailUrl": null, "detailHtmlPath": null, "pdfUrl": "https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2000/000102.pdf", "pdfArtifactPath": "data/sources/phmsa-interpretations/00-0102-92a0d7b2f3.pdf", "pdfArtifactSha256": "b7a48c2b574484f4fa049b23c627a7726777f770e3fb72bf19f3a2a499171aca", "extractedTextPath": "data/sources/phmsa-interpretations/00-0102-92a0d7b2f3.v2.txt", "extractedTextSha256": "cd64634bea06c2e10451d7152d13b4a240f34dd0896940a54cd8c2917809525f", "pageCount": 4, "extractionVersion": 2 } ], "caveat": "Interpretations apply regulations to the facts presented and do not create independently enforceable requirements.", "jurisdiction": "US" } ```