Corrigendum - REACH24H Consulting Group

T50 PORTABLE TANK INSTRUCTION (cont'd) 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.
UN
No
Non-refrigerated liquefied gases
Max. allowable
working pressure
(bar)
Small; Bare;
Sunshield; Insulated;
respectively a
3500 Chemical under pressure, n.o.s. See MAWP definition
in 6.7.3.1
3501 Chemical under pressure,
flammable, n.o.s.
3502
Chemical under pressure, toxic,
n.o.s.
3503
Chemical under pressure,
corrosive, n.o.s.
3504
Chemical under pressure,
flammable, toxic, n.o.s.
3505
Chemical under pressure,
flammable, corrosive, n.o.s.
Copyright@United Nations, 2011. All rights reserved.
See MAWP definition
in 6.7.3.1
See MAWP definition
in 6.7.3.1
See MAWP definition
in 6.7.3.1
See MAWP definition
in 6.7.3.1
See MAWP definition
in 6.7.3.1
- 122 -
Openings
below liquid
level
Pressure-relief
requirements b
(see 6.7.3.7)
Maximum
filling ratio
Allowed See 6.7.3.7.3 TP4 c
Allowed See 6.7.3.7.3 TP4 c
Allowed See 6.7.3.7.3 TP4 c
Allowed See 6.7.3.7.3 TP4 c
Allowed See 6.7.3.7.3 TP4 c
Allowed See 6.7.3.7.3 TP4 c
a
“Small” means tanks having a shell with a diameter of 1.5 metres or less; “Bare” means tanks having a shell
with a diameter of more than 1.5 metres 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 metres with sun shield (see 6.7.3.2.12); “Insulated”
means tanks having a shell with a diameter of more than 1.5 metres with insulation (see 6.7.3.2.12); (see
definition of “Design reference temperature” in 6.7.3.1).
b
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.
c
For UN Nos. 3500, 3501, 3502, 3503, 3504 and 3505, the degree of filling shall be considered instead of the
maximum filling ratio.
T75 PORTABLE TANK INSTRUCTION T75
This portable tank instruction applies to refrigerated liquefied gases. The general provisions of
section 4.2.3 and the requirements of section 6.7.4 shall be met.