{"operation":"document","citation":"14-0175","title":"Linde — Hazardous Materials Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"2015-04-13","effective_on":null,"summary":"14-0175 response to Linde concerning 173.31, 173.314, 179.18, 179.22.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-14-0175.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-14-0175.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-14-0175","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2015/140175.pdf","body":"<<<PAGE 1>>>\n\nof Transportation\nU.S. Department\nWashington DC 20590\n1200 New Jersey Avenue SE\nPipeline and Hazardous Materials\nSafety Administration\nMAR 1 3 2D15\nMr. John P. Smith, PE\nSenior Transportation Engineer\nLinde\n575 Mountain Ave.\nMurray Hill, NJ 07974\nRef. No. 14-0175\nDear Mr. Smith:\nThis letter responds to your September 19, 2014 email regarding required use of DOT\nspecification rail tank cars under in the Hazardous Materials Regulations (HMR; 49 CFR parts\n171-180). In your letter, you indicate that your company has historically used a DOT-\n105S500W tank car (foam insulated with a steel jacket) denoted with an \"S\" delimiter in lieu of\nthe \"A\" to indicate compliance with the requirement for tank head puncture resistance for the\ntransport of carbon dioxide (UN2187, Carbon dioxide, refrigerated liquid). Recently, you have\nbeen made aware that a car type DOT-105J500W tank car is now required with the \"J\" delimiter\ndenoting thermal protection when transporting this material based on § 173.31(b)(4).\nSpecifically, you request clarification of the correct tank car authorized for transportation of\n\"UN2187, Carbon dioxide, refrigerated liquid.\"\nYour tank cars have a thermal protection system that includes a steel jacket, thus, generally, the\nspecification marking must include the \"J\" delimiter. However, if insulation on the cars in\nquestion does not meet the thermal protection requirements, then your tank cars cannot be\nstenciled with the \"J\" delimiter indicating thermal protection with a metal jacket. For that case,\nyou will need a special permit to use an \"S\" delimiter stenciled car in Class 2 service. If the\ninsulation on the respective tank cars does meet the thermal protection requirements, then a Form\nR-1 amending the certificates of construction must be submitted to the Association of American\nRailroads, and the stenciling on the cars needs to be changed to reflect the \"J\" delimiter as\nrequired.\nA DOT-105 tank car is authorized under § 173.314 for transportation of \"UN2187, Carbon\ndioxide, refrigerated liquid.\" DOT-105 tank cars transporting a Class 2 material must have a\nthermal protection or insulation system (see § 173.31(b)(4)) that meets the thermal protection\nsystem requirements in § 179.18. The \"J\" delimiter means the tank car is equipped with a\nthermal protection system covered by a (metal) jacket and is equipped with a tank head puncture-\nresistance system. Thus, the requirement to mark with a \"J\" in lieu of\"A\" or \"S\" (see\n§ 179.22(c)). Further, in a final rule published June 26, 1996 entitled \"Crashworthiness\nProtection Requirements for Tank Cars; Detection and Repair of Cracks, Pits, Corrosion, Lining\n\n<<<PAGE 2>>>\n\nFlaws, Thermal Protection Flaws and Other Defects of Tank Car Tanks; Corrections and\nResponse to Petitions for Reconsideration\" (HM-189M; 61 FR 33252), PHMSA revised\n§ 173.31 (b)(4)(i) to clarify that a tank car having a thermal protection system (conforming to\n§ 179.18) and a tank car having an insulation system that has a heat flux of no more than 0.613\nkilojoules per hour, per square meter, per degree Celsius temperature differential, are considered\nto meet the thermal protection system requirement. For example, a tank car currently marked \"J\"\nor \"T,\" a tank car currently marked \"A\" but having a thermal protection material applied (e.g., 2-\ninches of ceramic fiber and 2-inches of glass fiber found on chlorine tank cars), and a tank car\nthat has superior thermal resistance, such as a tank car used for carbon dioxide (refrigerated\nliquid), are considered to conform to the thermal protection standard.\nI trust this information is helpful. If you have further questions, please do not hesitate to contact\nthis office.\nirk Der Kindere:\nActing Chief, Standard Development\nStandards and Rulemaking Division\n\n<<<PAGE 3>>>\n\nBroussard\n$|73.31\nDodd, Alice (PHMSA)\nTank Cars\nFrom:\n14-0175\nSent:\nCiccarone, Michael CTR (PHMSA)\nTo:\nMonday, September 22, 2014 1:30 PM\nHazmat Interps\nSubject:\nFW: Interpretation Request - DOT car type for CO2\nShante and Alice,\nPlease submit this for a formal letter of interpretation. Mr. Smith spoke to Adam Lucas in the HMIC.\nThanks,\nMike\nFrom: John.P.Smith@linde.com [mailto:John.P.Smith@linde.com]\nTo: PHMSA HM InfoCenter\nSent: Friday, September 19, 2014 5:51 PM\nSubject: Interpretation Request - DOT car type for CO2\nTo whom it may concern,\nLinde LLC would request an interpretation of 49 CFR for the use of DOT 105 S 500 W rail cars when transporting Carbon\nLiquid CO2 being hazard class 2.2 and UN # 2187.\nDioxide Refrigerated Liquid.\nLinde has owned, leased and operated CO2 rail cars as specified in 49 CFR Part 179.101, specifically DOT 105 A 500 W\nrail cars, foam insulated, with a steel jacket, and qualified for tank head puncture resistance thus denoted by the \" S\"\ndelimiter.\n\" delimiter denoting thermal protection.\nIt has recentiy been brought to our attention that car type DOT 105 J 500 W car are now required for CO2 rail cars. The \"j\nrequiring a \" J\" delimiter.\nOur attention was directed to 173.31 b 4 i. stating Class 2 material cars require thermal protection. Thermal protection\nWe request an interpretation to clarify the correct car type for Carbon Dioxide Refrigerated Liquid service.\nThe cars Linde uses are (DOT 105 S 500 W) are constructed with foam insulation system.\nRegards,\nJohn P. Smith PE\nSr Transportation Engineer\nLinde\n575 Mountain Ave\nMurray Hill, NJ 07974\nOffice 908 771 1240\nMobile Ph 732 829 9644","truncated":false,"body_characters":5456}