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Hazmat Tech Sect II
Hazmat Tech Tank Cars, IMO Containers, and Cargo Tanks.
| Question | Answer |
|---|---|
| What tank car is described as a tank-within-a-tank style? | Cryogenic Liquid Tank Car |
| What materials are transported in a Cryogenic Liquid Tank Car? | Materials shipped are the cryogenic liquids argon, ethylene, hydrogen, and nitrogen. |
| Where are the Loading and Unloading Points of a Cryogenic Liquid Tank Car? | Fittings for loading/Unloading, pressure relief, and venting are in ground-level cabinets at diagonal corners of the car or in the centre of one end of the car. |
| What is the working pressure of a Cryogenic Liquid Tank Car? | Cryogenic Liquid Tank Cars carry low pressure, usually 25 psi or lower, refrigerated liquids (minus 130F and below). |
| What is the working pressure of a Non-Pressure Tank Car? | Tank test pressures for non-pressure tank cars are 35 psi and 100 psi (414kPa-690kPa). |
| What is the capacity of a Non-Pressure Tank Car? | Capacities range from 4,000 gal to 45,000 gal. |
| What are some characteristics of a Non-Pressure Tank Car? | May or may not have an expansion dome and visible fittings. May have up to six compartments, with one set of fittings for each individual compartment. Compartments may have different capabilities and can transport different commodities at the same time. |
| Non-pressure Tank Car Emergency Shut-Off Valves | Nonpressure tank cars that carry flammable liquids (and some poisonous material) must have a spring-operated , reseating safety relief valve set to discharge at 75% of tank pressure (except some 60 psi tank cars may have a 35 psi safety valve.) |
| Where are the loading and unloading points on a non-pressure tank car? | Fittings and valves visible on top of car. Often has bottom unloading valves. |
| Where are the Emergency shut-off valves on a Pneumatically Unloaded Covered Hopper Car? | Safety relief devices are located on each compartment and are usually set at 75% of tank test pressure. Pressure is maintained only during unloading. |
| What is the working pressure of a Pressure Tank Car? | Tank test pressures for these tank cars are from 100 psi to 600 psi. |
| What is the capacity for a pressure tank car? | Capacities range from 4,000 to 45,000 gal. |
| Give a description of a tank pressure tank car? | Tank cars are cylindrical, non-compartmented tanks with rounded ends. Fittings and valves are enclosed in a dome. They may be insulated and/or thermally protected. Black paint usually indicates a jacketed tank car. |
| Elaborate on the emergency shut-off valves for the pressure tank valves. | Safety relief valves are usually set at 75% of tank test pressure. |
| What type of gases are not liquefied and are hauled in a tube module? | Nobel Gases |
| Where are the loading and unloading points on a pressure tank car? | Typically out of site under the single protective housing on top of the tanks. Typically top loading with their fittings inside the protective housing mounted on the manway cover plate in the center of the tank. |
| What do Intermodal tank containers transport? | Bulk gases and liquids. |
| What are the three basic types of Intermodals? | 1. Pressure 2. Non-Pressure 3. Specialized (including cryogenic portable tanks, and tube modules) |
| What do Intermodals transport? | Hazardous and non-hazardous materials (e.g. food grade commodities, liquid fertilizers, resins, anhydrous ammonia, liquefied petroleum gas (LPG), oxygen, helium, and nitrogen. |
| What is the capacity of Intermodal tank? | Range up to 5,500 gallons |
| Description of a Nonpressure Liquid Cargo Tank | May contain up to eight compartments, but most contain four to five compartments. Full-length roll over protection is along the tank top. Manways and dome lids are on the tank top. Most common leak is in the dome lid. |
| Description of a Low Pressure Liquid Cargo Tank | Insulated tanks look horseshoe shaped and noninsulated tanks appear round with ribs showing. Most common leaks are from the manway and the ends of the tank. Rollover protection surrounds the manways and the ends of the tank. |
| Description of a Corrosive Cargo Tank | Circular cross section, smaller diameter with external reinforcing ribs often visible. Single compartment but, may also be found in double shell configuration. The access housing area is often coated with a black, tar like material to protect it. |
| Description of a Pressurized Cargo Tank | Circular cross section with rounded heads. Single shell, noninsulated tank. The manway is located on one end of the tank. Seamless and/or welded steel. The upper two thirds not covered with a reflective jacket must be painted a reflective color. |
| What does a compressed gas tube trailer transport? | Bulk non-liquified compressed gas (e.g. helium, hydrogen, oxygen, and nitrogen) AKA noble gases. |
| Description of a Compressed Gas Tube Trailer | Consist of a group of seamless steel cylinders, 9 to 48 inches in diameter. May have as few as two to more than twenty cylinders. All cylinder contain the same material. Each cylinder is independently piped and valved. |
| Description of a Cryogenic Liquid Cargo Tank | Tank-within-a-tank design. Tank must have a suitable pressure guage, indicating the lading pressure, located on the front of the jacket so that the driver can read it in the rearview mirror. |
| Description of a Nonpressure Tank Facility (Ordinary Cone Roof) | Cone shaped pointed roof. It is designed with a weak roof-to-shell seam, designed to break when/if the container becomes overpressurized. Vapor space is explosive if exposed to an ignition source. Hazard Class 3 and 8. |
| Description of a Nonpressure Tank Facility (Floating Roof) | A large capacity, above ground holding tank frequently stores flammable liquids (e.g. petroleum products). Designed so that the roof floats on product eliminating the hazard of vapor space. A fabric or rubber seal around the circumference of tank. |
| Description of a Nonpressure Tank Facility (Lifter Roof Tank) | A lifter roof floats within a series of vertical guides that allow only a few feet of travel. The roof is either liquid or fabric-sealed and moves up and down with changes in vapor pressure. |
| Description of a Nonpressure Tank Facility (Vapordome Roof Tank) | Vertical storage tank with a giant bulge or dome on top. Attached to the underside of the dome is a flexible diaphragm that move in conjunction with the changes of pressure. |
| Description of a Nonpressure Tank Facility (Horizontal Tank) | A horizontal tank supported on steel stilts that may be compromised quickly during fire. |
| Description of a Pressure Tank Facility (Spheroid) | Egg shaped to round tank designed for low working pressure. |
| Description of a Pressure Tank Facility (Noded Spheroid) | The noded spheroid tank is held together by a series of internal ties and supports that reduce stress on the external shell. Bulging, ribbed sections (swelled looks). |
| Description of a Pressure Tank Facility (Pressure) | Painted white or some other reflective color. Commonly located at a site that dispenses petroleum products to the public. Elongated with rounded ends. |
| Description of a Pressure Tank Facility (Sphere) | Round ball like appearance. Most are white, or have a reflective appearance to reduce heat and vapor pressure. They are noninsulated. Frequently, supported off the ground with concrete or steel legs. |
| Description of a Cryogenic Tank Facility | Heavy insulated design with a vacuum in the space between inner and outer shell. Primarily found at heavy industrial facilities, hospitals, and gas processing facilities. |
| Description of a Radioactive Package Type A. | Cardboard boxes, wooden crates, metal drums used to transport radioactive material with a higher concentration of radioactivity than those allowed in excepted or industrial packages. Often with an inner containment vessel. |
| Description of a Radioactive Package Type B. | Can weigh more than 100 tons. Packaging must be strong enough to withstand a 30' drop on it's weakest point. Puncture test drop from 40" onto a steel rod that is 6" in diameter and 8" high. |
Created by:
oldsmaug
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