API Bolt Rectangle Target Plate For Steam Blowing
Aluminum Target Plate For Boiler Steam Purging
pipe →temporary pipe → target plat →temporary pipe → atmosphere.
Other disposal and requirement for temporary pipe of steam blowing
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1) All temporary pipelines before target plate should be based by argon arc weld, be treated by sandblast before installation and be carried out inner cleaning, finally accepted.
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2) The temporary valves should be controlled at central control room.
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3) The temporary pipe must be hanged and supported reliably and permit thermal expansion. |
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4) The temporary pipe must be insulated.
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6) Disconnect the drainage pipes from main steam, RH steam, and HP/LP bypass to flash tank, and install temporary pipes to drain.
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7) Mechanically purge the pipes which are not blown.
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Avoid second pollution during the system restoring.
Steam blowing
6.1 Necessary precondition check
Before boiler steam blowing, necessary precondition should be check according appendix I, the boiler steam blowing will be carried out when all of preconditions are satisfied,
6.2 Boiler steam blowing parameter
Trial steam blowing :
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open temporary valves when drum pressure atrespectively |
close temporary valves when drum pressure at respectively |
| 2.0～2.2 MPa | 1.4 MPa |
| 3.0～3.3 MPa | 2.0 MPa |
| 4.0～4.4 MPa | 3.0 MPa |
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