RE: Pipe Sizing

thank u. looks like we're on the same line. our "cutoff" is 12 inches. below that dia we use the delta p as the basis, above - the controlling factor is the velocity.

> ----------
> From: Neil Stone[SMTP:jnstone@MNSi.net]
> Reply To: <a href="/group/PipingDesign/post?postID=WwX6FXJS3A3XFFDG_pu0l-vVt7R5TfmTqRFNfAyX9tc1Sa0jaw503FtVKTEwQEBW6Uc4a3yi2OudcWSORn9NJz_erZAp-g">PipingDesign@yahoogroups.com</a>
> Sent: 25 June, 2001 5:23 PM
> To: <a href="/group/PipingDesign/post?postID=WwX6FXJS3A3XFFDG_pu0l-vVt7R5TfmTqRFNfAyX9tc1Sa0jaw503FtVKTEwQEBW6Uc4a3yi2OudcWSORn9NJz_erZAp-g">PipingDesign@yahoogroups.com</a>
> Subject: Re: [PipingDesign] Pipe Sizing
>
> Ultimately, all piping and ducting is sized on the basis of available
> pressure drop, but other factors may have to be considered, especially for
>
> situations where high pressure drop is available.
> Usually, steam line velocities are in the range 50 to 120 fps - the lower
> end being for long runs and/or small diameter pipes, and the higher end
> for
> short runs or larger diameters.
> Usually, you would not want to go above about 150 fps with steam, as there
>
> will be major erosion, especially with saturated steam, where condensate
> droplets are present.
> Noise may also be a factor - high velocity lines are quite noisy.
> Our experience is that, for smaller sizes, up to about 4", it is better to
>
> err on the large side, as the owner usually ends up wanting to put more
> steam down the line than the design value, and the initial cost of going
> up
> one pipe size is not a major one.
>
> At 11:06 AM 6/25/2001 +0300, you wrote:
> >Pressure lines such as pump disch lines are generaaly sized using the
> max.
> >delta p. What about the steam lines? Is the basis also the delta P or is
> the
> >controlling factor the velocity?
> >
>
> Neil Stone
> Esco Engineering
>
>
>
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Received on Thu Jun 28 02:32:00 2001