Schedule 4

“TABLE

Conditions of contact in actual use	Test conditions
Contact time	Test time
t ≤ 0.5 hour	0.5 hour
0.5 hour < t ≤ 1 hour	1 hour
1 hour < t ≤ 2 hours	2 hours
2 hours < t ≤ 24 hours	24 hours
t > 24 hours	10 days

Contact temperature	Test temperature
(1) Use simulant C at reflux temperature.
(2) Use simulant D at 150° or 175°C, in addition to simulants A, B and C used as appropriate at 100°C or at reflux temperature.
T ≤ 5°C	5°C
5°C < T ≤ 20°C	20°C
20°C < T ≤ 40°C	40°C
40°C < T ≤ 70°C	70°C
7°C < T ≤ 100°C	100°C or reflux temperature
100°C < T ≤ 121°C	121°Cf1
121°C < T ≤ 130°C	130°C
130°C < T ≤ 150°C	150°Cf2
T > 150°C	175°C

”