Portable tank instruction T50: This portable tank instruction applies to non-refrigerated liquefied gases and chemicals under pressure (UN Nos. 3500, 3501, 3502, 3503, 3504 and 3505). The general provisions of Section 4.2.2 and the requirements of Section 6.7.3 shall be met. Footnote a) to "Max. allowable working pressure": "Small" means tanks having a shell with a diameter of 1.5 m or less; "Bare" means tanks having a shell with a diameter of more than 1.5 m without insulation or sun shield (see 6.7.3.2.12); "Sunshield" means tanks having a shell with a diameter of more than 1.5 m with sun shield (see 6.7.3.2.12); "Insulated" means tanks having a shell with a diameter of more than 1.5 m with insulation (see 6.7.3.2.12); (See definition of "Design reference temperature" in 6.7.3.1). See Footnote b) concerning "Pressure- relief requirements": The word "Normal" in the pressure relief requirements column indicates that a frangible disc as specified in 6.7.3.7.3 is not required. ------------------------- (M): The substance may be carried in UN MEGCs.

Code PxBN(M): P = Type of tank: Tank, battery-vehicle or MEGC for liquefied gases or dissolved gases. ------------------------- x = Calculation pressure: Value of the minimum relevant test pressure according to the table in 4.3.3.2.5. ------------------------- B = Openings (see 6.8.2.2 and 6.8.3.2): Tank with bottom filling or discharge openings with 3 closures; or battery-vehicle or MEGC with openings below the surface of the liquid or for compressed gases. ------------------------- N = Safety valves/devices: Tank, battery-vehicle or MEGC with safety valve according to 6.8.3.2.9 or 6.8.3.2.10 which is not hermetically closed. ------------------------- (M) = The substance can also be carried in battery-vehicles or MEGCs.

(a) A vehicle intended for the carriage of liquids having a flash-point of not more than 60°C (with the exception of diesel fuel complying with standard EN 590:2013 + A1:2017, gas oil, and heating oil (light) - UN No. 1202 - with a flash-point as specified in standard EN 590:2013 + A1:2017) in fixed tanks or demountable tanks with a capacity exceeding 1 m³ or in tank-containers or portable tanks with an individual capacity exceeding 3 m³; or (b) A vehicle intended for the carriage of flammable gases in fixed tanks or demountable tanks with a capacity exceeding 1 m³ or in tank-containers, portable tanks or MEGCs with an individual capacity exceeding 3 m³; or, (c) A battery-vehicle with a total capacity exceeding 1 m³ intended for the carriage of flammable gases; or d) A vehicle intended for the carriage of hydrogen peroxide, stabilized or hydrogen peroxide, aqueous solution stabilized with more than 60% hydrogen peroxide (Class 5.1, UN No. 2015) in fixed tanks or demountable tanks with a capacity exceeding 1 m3 or in tank-containers or portable tanks with an individual capacity exceeding 3 m³;