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Strainer in Steam Line

01/23/2017 8:58 AM

Can we use strainer in vertical steam?

How? And can we use "Y" type strainer?

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#1

Re: Strainer in steam line

01/23/2017 9:08 AM

A1) Undefined: <...we...>. CR4 does not have a permission-giving function.

A2) By considering the piping design with due care and attention.

A3) Undefined: <...we...>. After due care and attention has been given to the piping design.

However, it is arguable that any operation that has to strain steam has a major problem, either with water quality, or with plant erosion and corrosion, or perhaps both of these.

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#3
In reply to #1

Re: Strainer in steam line

01/23/2017 9:44 AM

...or boiler operation.

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#4
In reply to #1

Re: Strainer in steam line

01/23/2017 12:33 PM

Not true, P.W. - we have steam being injected from a 600+ psig HRSG back into a GE LM2500 gas turbine. That steam is for compressor discharge pressure modulation, and for NOx control. That steam must be passed through not just a strainer it is actually a sintered metal filter. Tiny particles of magnetic carry over in many boilers, and these can erode turbine blading, and also destroy the ventilation pores in them.

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#8
In reply to #4

Re: Strainer in steam line

01/23/2017 4:08 PM

What are "Tiny particles of magnetic" ?

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#9
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Re: Strainer in steam line

01/23/2017 4:28 PM

"tiny particles of magnetic" was a typographic error on my part. Apologies.

It should have read "tiny particles of magnetite." Magnetite is magnetic iron oxide, and is often found in some boilers (some more so than others), but is likely present in any boiler where the tubing and drums are made of carbon steel.

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#10
In reply to #9

Re: Strainer in steam line

01/23/2017 4:30 PM

Ah. Thanks for clarifying.

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#12
In reply to #4

Re: Strainer in steam line

01/24/2017 2:51 AM

<...arguable...>

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#16
In reply to #12

Re: Strainer in steam line

01/24/2017 9:35 AM

What is arguable?

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#19
In reply to #16

Re: Strainer in steam line

01/24/2017 11:56 PM

What isn't?

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#13
In reply to #4

Re: Strainer in steam line

01/24/2017 3:14 AM

...that the boiler and its associated piping are decomposing from the inside out...

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#17
In reply to #13

Re: Strainer in steam line

01/24/2017 9:36 AM

sometimes from the inside, sometimes from the outside (depends on what is in the immediate environment around the boiler and if it can get inside the boiler enclosure.

I have seen both, neither are pretty.

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#18
In reply to #1

Re: Strainer in steam line

01/24/2017 1:29 PM

James Stewart is correct.

Where I work, we build mostly sanitary water systems for heating plant water for injection. It is very rare that we don't have a strainer in the condensate line, and have even had a strainer in the chilled water line on some systems. It never hurts to be safe. Our SS piping and hxr tubing should not have issues but, hey, even that can corrode.

Before electrical control became a constant job, I drew entire skid systems and always had a strainer in the condensate line from a hxr.

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#20
In reply to #18

Re: Strainer in steam line

01/25/2017 3:47 AM

Condensate picks up crud from everywhere. Strainers are a good idea. However, if it does end up back in the boiler, then it should re-appear during blow-down and wash-out operations.

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#22
In reply to #20

Re: Strainer in steam line

01/25/2017 9:05 AM

Some systems do not have all that much blow-down on them. I run boilers at a cycling of 20-50 cycles of silica concentration, and still meet steam quality requirements.

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#2

Re: Strainer in Steam Line

01/23/2017 9:29 AM

Spirax has a very useful information and application for their components.

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#5

Re: Strainer in Steam Line

01/23/2017 2:23 PM

What is vertical steam?

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#6
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Re: Strainer in Steam Line

01/23/2017 2:28 PM

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#7
In reply to #5

Re: Strainer in Steam Line

01/23/2017 3:04 PM

It the the steam that rises up the down comer? LOL

OR it could be the steam that is going down, down, down. I never thought much of the 1913 steam powered airplanes. It was an unlucky year.

Steam never leaks vertically, by the way, it always comes out in a most horizontal way in order to inflict the most injury on passersby in the plant. The old adage: if steam is leaking, best not be peeking, if you are afraid, take a stick and a rag on parade.

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#11
In reply to #7

Re: Strainer in Steam Line

01/24/2017 12:16 AM

James, I couldn't find that adage, but I did find this:

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#14
In reply to #5

Re: Strainer in Steam Line

01/24/2017 6:24 AM
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#21
In reply to #5

Re: Strainer in Steam Line

01/25/2017 3:56 AM

It provides gland seal steam adjacent to the relative bearing.

....but that is just one use.

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#15

Re: Strainer in Steam Line

01/24/2017 7:53 AM

Unlike other types of strainers, a Y-Strainer has the advantage of being able to be installed in either a horizontal or vertical position. Obviously, in both cases, the screening element must be on the "down side" of the strainer body so that the entrapped material can properly collect in it.

Read more: http://www.lenntech.com/systems/sediment/y/y-strainer.htm#ixzz4WgPMX1La

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