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Cryogenic Cargo Tank Training

Cryogenic Cargo Tank Training. Cargo Tanks - Refrigerated Liquid Transport. Definition of Cryogenic Liquid.

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Cryogenic Cargo Tank Training

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  1. Cryogenic Cargo Tank Training Cargo Tanks - Refrigerated Liquid Transport

  2. Definition of Cryogenic Liquid • A cryogenic liquid means a refrigerated liquefied gas having a boiling point colder than -90ºC (-130ºF) at 101.3 kPa (14.7 psia)A material meeting this definition is subject to the requirements of the HMR without regard to whether it meets the definition of a non-flammable, non-poisonous compressed gas [see 49 CFR §173.115(g)]

  3. Cryogenic Liquids and TheirBoiling Points -244º F Krypton -258º F Methane Ethylene -273º F Oxygen -297º F Argon -302º F Nitrogen -320º F -410º F NOTE: Atmospheric gases turn solid at boiling points for neon, hydrogen and helium Neon -423º F Hydrogen -452º F Helium

  4. Potential Hazards ofCryogenic Liquids • Frostbite on skin caused by short term exposure to very low temperatures • Large volumes of gas generated by high expansion of liquid to gas (~800x expansion ratio) • Flammable gas/air mixtures resulting from leaks • Asphyxiating atmosphere resulting from leaks of non-flammable gases • Leaks caused by components shrinking at very low temperatures • “Oxygen rich” liquid air condensing on outside of transfer hoses or piping caused by very low temperatures • Damage to carbon steel and elastomeric components resulting from exposure to cryogenic temperatures • Unexpected functioning of safety valves or bursting discs on containers

  5. Cutaway View - Typical Cryogenic Trailer Presented with Permission of Cryenco

  6. Cryogenic Container-Similar to a Thermos Bottle

  7. Spec v. Non-spec Cargo TanksWhy Does it Matter ? §173.320 Cryogenic liquids; exceptions. (a) Atmospheric gases and helium, cryogenic liquids, in Dewar flasks, insulated cylinders, insulated portable tanks, insulated cargo tanks, and insulated tank cars, designed and constructed so that the pressure in such packagings will not exceed 25.3 psig under ambient temperature conditions during transportation are not subject to the requirements of this subchapter when transported by motor vehicle or railcar except as specified in paragraphs (a)(1), (a)(2), and (a)(3) of this section.

  8. Non-spec Cargo TanksRequirements [§173.320(a)] • Sections 171.15 and 171.16 of this subchapter • Immediate notice of certain hazardous materials incidents • Detailed hazardous materials incident reports • Subparts A, B, C, D, G and H of part 172 • Subparts A and B of part 173, and §§ 174.1, 177.800, 177.804, and 177.823 of this subchapter

  9. Non-spec Cargo TanksRequirements [§173.320(a)] • Sections 171.15 and 171.16 of this subchapter • Immediate notice of certain hazardous materials incidents • Fatality • Injury requiring admittance to hospital • Evacuation of public lasting longer than one hour • Major transportation artery is closed for longer than one hour • Flight pattern is altered • Fire, breakage, spillage of radioactive material • Fire, breakage, spillage of infectious substance/waste • Spill of marine pollutant >450 liters • Situation of continuing danger (person in possession of haz mat determines) • Detailed (written) hazardous materials incident reports

  10. Non-spec Cargo TanksRequirements [§173.320(a)] • Subparts A, B, C, D, G and H of part 172 • Subpart A - General • Subpart B - Haz Mat Table & Special provisions • Subpart C - Shipping papers • Subpart D - Marking • Subpart G – Emergency Response Information • Subpart H – Training • NOTE: Releases do not include a release that is the result of venting through a pressure control valve, or the neck of the Dewar flask.

  11. Non-spec Cargo TanksRequirements [§173.320(a)] (3) Subparts A and B of part 173, and §§ 174.1, 177.800, 177.804, and 177.823 of this subchapter. General (Parts 173.1 – 173.13) Preparation of Haz Mat for transportation (Parts 173.21 – 173.40)

  12. Cargo Tank Authorization for cryogenic liquids

  13. Construction Requirements Cryogenic Trailers

  14. Tanks in LO2 or flammable cryogenic service must have two independent pressure relief systems 1 or more PRV’s 1 or more bursting discs or PRV’s Tanks in LO2 or flammable cryogenic service must have two independent pressure relief systems 1 or more PRV’s 1 or more bursting discs or PRV’s Requirements for Pressure Relief Systems CGA-341 DOT-338

  15. Marking & Placarding Requirements for Cryogenic Trailers

  16. Tanks in LHe or atmospheric gas service must have at least one pressure relief system 1 or more PRV’s Combination of 1 or more bursting discs or PRV’s Capacities of PR System must equal or exceed amount specified in CGA S-1.2 120% for primary device 150% for secondary device Tanks in LHe or atmospheric gas service must have at least one pressure relief system 1 or more PRV’s Combination of 1 or more bursting discs or PRV’s Capacities of PR System must equal or exceed amount specified in CGA S-1.2 120% for primary device 150% for secondary device Non-spec vs. MC-338 Cryogenic TrailersRequirements for Pressure Relief Systems CGA-341 DOT-338

  17. Placarding Requirements forCryogenic Cargo Tanks

  18. Requalification Requirements forCryogenic Cargo Tanks

  19. Inspection ChecklistCryogenic Trailers

  20. Inspection ChecklistCryogenic Trailers

  21. Contact information dave_sonnemann@praxair.com Tel. (203) 837-2294

  22. Any Questions?

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