8.1.2 Cleaning results
The cleaning result depends on the following factors:
●
Temperature
●
Time
●
Mechanics
●
Chemicals
●
Degree of soiling
These factors can be combined in such a way as to make an optimal cleaning result
probable.
8.2 Passivation
Before a system with long pipes and tanks is commissioned, it usually needs to be pas-
sivated.
Valve blocks are usually excepted from this.
Passivation is usually carried out with nitric acid (HNO
3
) at about 80 °C (176 °F) in a
concentration of 3 % and a contact time of 6 to 8 hours.
46 / 128 - 8.2 Passivation
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Summary of Contents for ECOVENT
Page 6: ...6 128 Table of Contents 0000000607 002 EN GB...
Page 9: ...1 4 Declarations of conformity 1 4 Declarations of conformity 9 128...
Page 12: ...12 128 1 4 Declarations of conformity 0000000607 002 EN GB...
Page 20: ...20 128 2 10 Emergency measures 0000000607 002 EN GB...
Page 40: ...40 128 5 5 Checking the pneumatic connection 0000000607 002 EN GB...
Page 44: ...44 128 7 3 Shutdown 0000000607 002 EN GB...
Page 106: ...106 128 9 7 Maintenance 0000000607 002 EN GB...
Page 120: ...120 128 12 2 Spare parts list 0000000607 002 EN GB...
Page 127: ...13 2 List of abbreviations 127 128...