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Anonymous Poster

Water Leakage - Steam Turbine

06/27/2008 1:57 AM

sir

we have a 100mw steam turbine having 32 stage and hot water comes from its upper casing and lower casing bolted joint. this bloted joint near the 30th stage.

i want to know the possible causes of this leakage

kindly help me

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Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
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#1

Re: water leakage

06/27/2008 7:48 AM
  • The bolts aren't tight enough
  • The joint material is leaking
  • The joint material has mechanical damage
  • The casing is cracked
  • The welds are not 100%
  • The piping is misaligned

Etc., etc.

It's difficult to see from here.

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Active Contributor

Join Date: May 2008
Posts: 17
#2

be carefull - steam can not be advised from our home!

06/27/2008 10:48 AM

steam has the most potential to become a disaster/accident.

i think U should figure it out with local contractor.

eyal

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Participant

Join Date: Sep 2007
Location: I am located at PUNE, an industrial city in India near MUMBAI (BOMBAY)
Posts: 4
#3

Re: Water Leakage - Steam Turbine

06/28/2008 1:15 AM

Possible causes :

1]Higher water level in the underslung condenser , if you have

2]The joint damaged

3] Bolts in suffcientely tighteened

4]Check the steam inlet and other stage temperature.

5]Check the loading of turbine

6]Possible cause of priming

7]Chances of water hammers

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Associate

Join Date: Mar 2008
Location: Southern California
Posts: 46
Good Answers: 2
#4

Re: Water Leakage - Steam Turbine

06/28/2008 9:39 AM

The steam trap on the gland seal may be plugged shut.

I agree with the previous post - you should bring in a local specialist to idetnify the root cause and take corrective action before a serious failure occurs.

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Anonymous Poster
#5

Re: Water Leakage - Steam Turbine

06/28/2008 11:09 PM

The steam is condensing into water at the 30th stage.

As it turns into water, it cannot be compressed.

The steam behind it is pushing the water through any very small crack or opening in the casing.

It probably is a leak, however, what caused it?

If the steam is not hot enough to completely pass through 32 stages, then it will condense into water too early. If it condenses into water, the very high pressure of the steam drives the water against everything inside the turbine, striking it, and loosening anything that may come loose under such conditions.

To solve the problem, you may need to preheat the turbine before applying full steam;

You may need to increase the temperature of the high pressure water, so that it remains steam through all of the stages;

Any valve that is downstream of the turbine can create big problems if it opens too soon, too fast, or is not closing all of the way.

Bring in an expert, though, because you are dealing with a force that is capable of blowing the entire turbine apart and killing everyone in the enclosure.

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Associate

Join Date: Jun 2008
Posts: 25
#6

Re: Water Leakage - Steam Turbine

06/30/2008 12:23 AM

Sir,

This needs to check the following points

1-Analysis of the exhaust.

2-Proper jointing,

3-Quality of steam i.e pressure, temp. and dryness as this will change at every stage.

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Guru
Engineering Fields - Marine Engineering - New Member

Join Date: Aug 2007
Location: Australia
Posts: 1630
Good Answers: 20
#7

Re: Water Leakage - Steam Turbine

06/30/2008 10:23 AM

Could you please inform us of the steam pressure and temperature at the turbine inlet.

Who is the manufacturer of the turbine.

and another question that was asked before.......What type of condenser does the turbine have.

You certainly should not have water leaking from any part of the turbine casing..........severe damage could occur to turbine blading if steam is condensing before it reaches the condenser.

How do you hold a vacuum in the condenser with what appears to be a large leak?

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