When a new Boiler and turbine is installed, the steam line is to be cleaned perfectly by Steam BLOW-OUT and the target plate will reveal the quality of the Blow-out and this is known to all the connected people who implement a project.
Now I request CR4 MEMBERS to give their views on the following points.
1. What is the percentage on the working pressure of the steam to be maintained for the line BlowOut.? In the earlier projects, I always given blow-out at full pressure and temperature, now the supplier of the present project equipment is NOT agreeing to blow-out with full pressure and temperature, the full pressure and temp in this case is 110 ata and 540 Deg.C and says only 60% of the working pressure alone to be used for the blow out, which I do not agree.
Second point in the new installation is the plant supplier says the steam line from the boiler to the turbine is to be insulated before the line blow-out. I am of the view that insulation/lagging to be done after blow-out only. The reason being, the line will take more time to cool down and insulated liine means cooling will be very slow, than the bare line and the contraction will take more time for insulated line.
2. In the existing plant, the old boiler and turbine commissioned about 10 years back. The boiler is shut down for 3 months in a year. The operatiing-in-charge says, while starting after 3 months, he has to blow out the existing line (with out target plate) and I am of the opinion - the blow-out is not required for the existing plant which is working for the past 10 years, provided the Feed Water Quality for the Boiler is strictly and rigidly maintained. The Turbine Rotor is an indicator for the quality of the Steam, no deposit means correct quality of steam and any deposit means steam quality is poor.
As plant operators, we have responsibilty to maintain the correct parameters for the equipments.
Any other detail required, I shall post here.
Thanks,
DHAYANANDHAN.S
Steam Line Blow-Out
Re: Steam Line Blow-Out
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