T-CODES
T1
1.5
5 mm if D < 1.80 m or 6 mm if D > 1.80
Normal (no bursting disc required)
2 shut-off devices
T2
1.5
5 mm if D < 1.80 m or 6 mm if D > 1.80
Normal (no bursting disc required)
3 shut-off devices
T3
2.65
5 mm if D < 1.80 m or 6 mm if D > 1.80
Normal (no bursting disc required)
2 shut-off devices
T4
2.65
5 mm if D < 1.80 m or 6 mm if D > 1.80
Normal (no bursting disc required)
3 shut-off devices
T5
2.65
5 mm if D < 1.80 m or 6 mm if D > 1.80
Safety relief valve with bursting disc in series
Not allowed
T6
4
5 mm if D < 1.80 m or 6 mm if D > 1.80
Normal (no bursting disc required)
2 shut-off devices
T7
4
5 mm if D < 1.80 m or 6 mm if D > 1.80
Normal (no bursting disc required)
3 shut-off devices
Particular cases
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