{"operation":"document","citation":"12-0086","title":"Pelchem — Hazardous Materials Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"2012-06-21","effective_on":null,"summary":"12-0086 response to Pelchem concerning 172.101, 173.211, 173.212, 173.213, 173.301.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-12-0086.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-12-0086.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-12-0086","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretations/2012/120086.pdf","body":"<<<PAGE 1>>>\n\nU.S. Deoartment\n,:;t Transportation\n~:lipeline and Hazardous\n~·.naterials Safety\nAdministration\n:..200 New Jersey Avenue. SE\n.Wtshington, D.C. 20590\n;UN 2 1 2012\nEG Valkenburgh\nPelchem\nPO Box 582\nPretoria, South Africa 0001\nReference No.: 12-0086\nDear Mr. Valkenburgh:\nThis responds to your March 15, 2012letter requesting clarification of the Hazardous\nMaterials Regulations (HMR; 49 CFR Parts 171-180) applicable to pressure relief devices\nfor cylinders. Specifically, you ask if a pressure relief device is required on a pressure\ncylinder filled with Xenon Difluoride using the proper shipping name, ·'UN3085, Oxidizing\nSolid Corrosive, n.o.s.?\"\nThe answer is no. The Hazardous Materials Table (HMT) in§ 172.101 designates approved\nnon-bulk packagings for \"UN3085, Oxidizing Solid Corrosive, n.o.s.,\" in§§ 173.211,\n173.212, and 173.213 depending on the packing group. These sections allow for the use of\ncylinders as an approved non-bulk packaging for ''UN3085, Oxidizing Solid Corrosive,\nn.o.s.\" In addition, § 173.301 (f)(l) states that \"a cylinder tilled with a gas and offered for\ntransportation must be equipped with one or more pressure relief devices.\" Therefore,\nbecause your cylinder only contains a solid material, and is thus not a gas, it would not be\nrequired to have a pressure relief device.\nI hope this satisfies your inquiry. Please contact us if we can be of further assistance.\nSincerely,\nT. Glenn Foster\nChief, Regulatory Review and Reinvention Branch\nStandards and Rulemaking Division\n\n<<<PAGE 2>>>\n\nA subsidiary of Necsa Ltd\nPO Box 582\nPretoria 0001\nSouth Africa\n•\n0 +27 12 305 3415\nG +27 12 305 4445\nG +27 83 628 0831\n0 eddyv@pelchem.necsa.co.za\nG www.pelchem.com\npelchem ~\nWe\"\"re fit your world ~\n15 March 2012\nOffice of Hazardous Materials Standards\nPipeline and Hazardous Materials Safety Administration\nPHH10\nU.S. Department of Transportation\nEast Building\n1200 New Jersey Avenue, SE\nWashington, DC 20590-0001\nDear Madam or Sir\nRequest for Guidance and Interpretation\nIn accordance with 49 CFR 105.20 Guidance and Interpretations, Pelchem (Pty) Ltd is\nrequesting an interpretation of the requirements for packing and shipping Xenon difluoride:\nXeF2 (UN 3085 Oxidizing Solid Corrosive N.O.S) in high pressure DOT 3AL cylinders, by\nAirfreight, to and within the USA.\nI have reviewed the 49 CFR sections 171, 173 and 178 against other International Regulations\nUN, IMDG and lATA Regulations for Transport of Dangerous Goods and could not locate\nanything that directly answers my questions.\nFor your convenience I attach the known properties of Xenon difluoride (XeF2 ), classification\nand packaging details to this letter.\nQuestion: Is a Pressure Relief Device required on a pressure cylinder filled with XeF2 :UN\n3085 Oxidizing Solid Corrosive NOS (not classified as a Gas)?\nPelchem Interpretation: 49 CFR 171.22 (a)- (d) Authorization and Conditions for the use of\ninternational standards and regulations, allows a hazardous material to be offered for transport\nin the USA on the basis that it is in full compliance with accepted international regulations.\nPelchem interprets that XeF2 packaged in a cylinder that complies with UN, IMDG or lATA\nRegulations can be offered for on carriage transport in the USA, without a Pressure Relief\nDevice.\nThe UN Regulations Rev 17 of 2011 (and IMDG) allows Pressure receptacles for liquids and\nsolids (not classified as gases) in Packaging Instruction P002, subject to conditions in 4.1.3.6.\nThe conditions in 4.1.3.6 refer to a pressure relief device as optional to prevent a receptacle\nfrom bursting in case of overfill or fire conditions.\nDirectors: Dr RM Adam (Chairperson) Ms N Dayaram Ms N Galeni Ms MN Mathibe\nDr APS Terblanche (Managing Director) Prof D Ramjugernath Mr F Hendricks\nCompany Secretary: Mr AC Mabunda\nMrV Naidoo Prof DR Arnold\nREG. NO. 1984/008671/07\n•\nSABS .,t~.·~·\n\n<<<PAGE 3>>>\n\nSimilarly the lATA Regulations 53 rd Edition of 2012 allows the use of cylinder for liquids and\nsolids under Packaging Instruction PI 562, subject to conditions in 5.0.6.6. The conditions in\n5.0.6.6 refer to a pressure relief device as optional to prevent a receptacle from bursting in\ncase of overfill or fire conditions.\nFrom CFR Vol 20 of 31 Jan 2007- Transportation of Oxygen and other Oxidizing gases and\nOxygen generators on Aircraft, and reference to 49 CFR 178 Appendix D & E Thermal\nresistance and Flame penetration tests - I take the fire condition in a Cargo plane fitted with\nfire suppression, as 205°C (400°F). At this temperature the vapour pressure of XeF2 is\ncalculated at 25 Bar (170 psi) which is far below the 122 Bar (1800 psi) Working pressure of\nthe cylinders and does not pose a risk of rupture.\nDoes DOT confirm the interpretation of Pelchem?\nThank you for your assistance in this matter. If I can be of any further assistance, please\ncontact me on +27-83-628 0831 ore mail at Eddy.Valkenburgh@pelchem.necsa.co.za\nRespectfully submitted\nEG Valkenburgh\nChief Advisor: Special Projects\nPelchem (Pty) Ltd\nSouth Africa\nOffice ph +27-12-305 2415\nMobile ph +27-83-628 0831\n\n<<<PAGE 4>>>\n\nThe Properties, Classification and Packaging of Xenon difluoride\n1. XeF2 Properties\nBoiling point: 114°C\nMelting point: 129°C\nNon flammable\nCombustible with cellulose materials\nVapour pressure:\nReference: Gutman, Halogen Chemistry Vol 1, 1976\n(Temp range 0 °C- 115 °C)\nXeF2 vapour pressure (kPa)\n100\n90\n80\n70\nns 60\n~50\n40\n30\n20\n10\n0\n10 20 30 40 50 60 70 80 90 100 110\nTemperature (C)\n2. XeF~Ciassification for Transport\nUN Transport of Dangerous Goods: Model Regulations Rev 17 of 2011\nVolume 1 Par 2.2.1 Gases -definition and general provisions\nXeF2 is does not meet the criteria to be classified as a compressed gas.\nXeF2 is classified as (Supported by tests conducted at an accredited laboratory)\nUN 3085 Oxidizing Solid, Corrosive NOS: Xenon difluoride\n\n<<<PAGE 5>>>\n\n3. XeF~ packaging in DOT 3AL cylinders\n0.3 liter Catalina cylinder 9001-P\nDiameter 51 mm; Height 238 mm\nWorking pressure: 1800 psi; 124 Bar\nTest pressure DOT: 3000 psi; 207 Bar\n600 gram max per cylinder in a UN certified outer pack (transport case)\n1.0 liter Catalina cylinder 9077 -P\nDiameter 81 mm; Height 298 mm\nWorking pressure: 2216 psi; 153 Bar\nTest pressure DOT 3693 psi; 255 Bar\n2000 gram max per cylinder in a UN certified outer pack (transport case)\n3.0 liter Catalina cylinder 9021-P\nDiameter 111 mm; Height 422 mm\nWorking pressure: 2015 psi; 139 Bar\nTest pressure DOT: 3358 psi; 232 Bar\n5000 gram max per cylinder in a UN certified outer pack (transport case)\n15 liter Luxfer cylinder N088\nDiameter 184 mm; Height 835 mm\nWorking pressure: 2216 psi; 153 Bar\nTest pressure DOT: 3693 psi; 255 Bar\n25 000 gram max in an uncertified over pack (transport case)","truncated":false,"body_characters":6730}