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IATA危险品规章 Dangerous Goods Regulations 2(34)

时间:2014-11-10 01:35来源:IATA 作者:航空 点击:
  
(a)such that the total gauge pressure in the packaging,
i.e. the vapour pressure of the filling substance plus the partial pressure of air or other inert gases, less 100 kPa, at 55°C, determined on the basis of a maximum degree of filling in accordance with 5.0.2.8 and a filling temperature of 15°C, will not exceed two-thirds of the marked test pressure; or
(b)at 50°C less than four-sevenths of the sum of the marked test pressure plus 100 kPa; or
(c)  at 55°C less than two-thirds of the sum of the marked test pressure plus 100 kPa (see Table 5.0.A).
However, where the packaging is selected on the basis of 5.0.2.14.2(a) above the hydraulic test pressure marked in accordance with 6.0.4.2 must be 100 kPa or more (80 kPa or more for liquids in Packing Group III of Class 3 or Division 6.1).
Notes:
1.The maximum vapour pressures in (b) and (c) above refer to the basis of the formula. The minimum hydraulic test pressure refers to the aircraft altitude.
2.Table 5.0.A appearing under 5.0.2.9 refers to the use of (c) above only, which means that the marked test pressure must exceed 1.5 times the vapour pressure at 55°C less 100 kPa. When, for example, the test pressure for n-Decane is determined according to 6.3.5.3.1, Method A, the minimum marked test press-ure of 80 kPa applies.
3.Definitions for the packaging nomenclature are given in Appendix A.
4.Details of packaging codes are given in 6.0.3.
5.0.2.14.3 The closures of packagings containing wetted or diluted substances must be such that the percentage of liquid (water, solvent or phlegmatizer) does not fall below the prescribed limits during transport.
5.0.2.15 Plastic Drums, Jerricans and Intermediate Bulk Containers (IBC)
For plastic drums and jerricans and rigid plastic IBC and composite IBC with plastic inner receptacles, unless otherwise approved by the appropriate national authority, the period of use permitted for the transport of dangerous goods must be not more than five years from the date of manufacture of the receptacles, except where a shorter period of use is prescribed because of the nature of the substance to be transported.
5.0.2.16 Self-reactive Substances and Organic Peroxides
Packagings for self-reactive substances of Division 4.1 and organic peroxides must conform to the applicable requirements of Chapter 6 and must meet the test requirements for Packing Group II.
5.0.3 Limited Quantities
5.0.3.1 Dangerous goods being shipped under the pro-visions for Limited Quantities must be packed in accord-ance with 2.7.5 and 5.0.2 to 5.0.4 except 5.0.2.3, 5.0.2.5,
5.0.2.11 and 5.0.2.14.2.
5.0.4 Conditions Normal to Air Transport
5.0.4.1 Temperature
For the information of users of these Regulations, the extremes of temperature which may be encountered in international transportation are in the order of -40°C and 55°C. Since receptacles or packagings may be filled at low temperatures and then exposed in transit in tropical areas, the increase in temperature may tend to cause discharge of liquid contents or bursting of the receptacles or packagings during transit, unless a suitable ullage (outage) has been provided and the receptacles or packagings meet the pressure requirements of 5.0.2.9.
5.0.4.2 Pressure
Due to altitude, the ambient pressure experienced by a package during flight will be lower than standard atmospheric pressure at sea level. Since receptacles and packagings will generally be filled at a standard atmos-pheric pressure of approximately 100 kPa (1 bar), this lower ambient pressure will result in a pressure differen-tial between the contents of the receptacle or package and the cargo compartment. For pressurized cargo com-partments, the pressure differential may be approximately 25 kPa, while for non-pressurized or partially pressurized cargo compartments, the pressure differential may be as much as 75 kPa. This pressure differential will tend to cause discharge of liquid contents or bursting of the
5.0
receptacles or packagings during flight, unless each receptacle or packaging and its closures meet the pack-aging test requirements.
5.0.4.3 Vibrations
Vibrations in commercial aircraft to which packagings may be exposed range from 5 mm amplitude at 7 Hz (corre-sponding to 1 g acceleration) to 0.05 mm amplitude at 200 Hz (corresponding to 8 g acceleration).
5.0.5 Transitional Packaging Arrangements
5.0.5.1 For arrangements for the use of packagings for Class 7, Radioactive Material manufactured under earlier requirements, see 10.5.7.
5.0.6 Format of Packing Instructions
5.0.6.1 The packing instructions in this section appear in class number sequence, but this sequence does not indicate any precedence of hazard:
●Class 1—Explosives
●Class 2—Gases
●Class 3—Flammable liquids
●Class 4—Flammable solids; substances liable to spontaneous combustion; substances, which in con-tact with water, emit flammable gases
●Class 5—Oxidizing substances; Organic peroxides
●Class 6—Toxic and Infectious substances
●Class 7—Radioactive material (see Subsection 10.5)
●Class 8—Corrosives
●Class 9—Miscellaneous dangerous goods.
5.0.6.2 Each packing instruction shows, where appli-cable, the acceptable single and combination packagings. For combination packagings, tables show the acceptable outer packagings and associated inner packagings together with the maximum quantity permitted in each inner packaging. Where provisions for particular substances or articles apply, a table shows the inner packagings with associated quantity limitations, the permitted quantity per package and, where applicable an indication if single packagings are permitted. Where appropriate, additional packing requirements are shown in some packing instructions. These additional packing requirements may impose a higher standard of packaging than would normally apply to the packing group, or may require specific packaging considerations.
 
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