FEED Validator

for Atom and RSS and KML

Congratulations!

This is a valid RSS feed.

Recommendations

This feed is valid, but interoperability with the widest range of feed readers could be improved by implementing the following recommendations.

line 48, column 0: style attribute contains potentially dangerous content: color:rgb(51,61,66);font-family:'-apple-system', BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', sans-serif; (5 occurrences) [help]
```
		<description><![CDATA[<p  style="color:rgb(51,61,66);font-family:'-apple-s ...
```
line 133, column 0: Missing atom:link with rel="self" [help]
```
</channel>
```

Source: https://www.cheresources.com/invision/rss/forums/1-front-page/

<?xml version="1.0" encoding="UTF-8" ?>
<rss version="2.0">
<channel>
<title>front_page</title>
<description>Front page of site</description>
<link>https://www.cheresources.com/invision</link>
<pubDate>Sun, 02 Nov 2025 22:03:34 +0000</pubDate>
<ttl>180</ttl>
<item>
<title>Equal Load Sharing And Anti-Surge Control</title>
<link>https://www.cheresources.com/invision/topic/32738-equal-load-sharing-and-anti-surge-control/</link>
<description>Could you please explain me how the equal load sharing and anti-surge control works for 2 compressors (at 50% each) run in parallel?</description>
<pubDate>Sun, 02 Nov 2025 22:03:34 +0000</pubDate>
<guid isPermaLink="false">https://www.cheresources.com/invision/topic/32738-equal-load-sharing-and-anti-surge-control/</guid>
</item>
<item>
<title>Control Strategy For 2 Air Compressors In Parallel</title>
<link>https://www.cheresources.com/invision/topic/32737-control-strategy-for-2-air-compressors-in-parallel/</link>
<description><![CDATA[Hello everyone, 
 
Could someone share any experience about controlling 2 air compressors working in parallel? 
 
Thank you in advance! ????]]></description>
<pubDate>Fri, 31 Oct 2025 17:09:30 +0000</pubDate>
<guid isPermaLink="false">https://www.cheresources.com/invision/topic/32737-control-strategy-for-2-air-compressors-in-parallel/</guid>
</item>
<item>
<title>Water Hammer In Condenser</title>
<link>https://www.cheresources.com/invision/topic/32735-water-hammer-in-condenser/</link>
<description><![CDATA[I recently was tasked to help operate and oversee the drying of sludge using low temperature dryer which powered by hot water heated from excess steam. 
 
To prepare myself i search about things that could go wrong in a steam/water process. I read that steam could create a vacuum when condensing and force water to fill that vacuum abruptly causing something similar to an explosion. So far from what i understand, the only way to prevent this phenomena is to prevent the condensation entirely along the pipeline. But now i wonder, how is this prevented in a heat exchanger system? or in an condenser system? where condensing is kinda inevitable
]]></description>
<pubDate>Fri, 31 Oct 2025 09:22:05 +0000</pubDate>
<guid isPermaLink="false">https://www.cheresources.com/invision/topic/32735-water-hammer-in-condenser/</guid>
</item>
<item>
<title>Foam System Criteria For Hc Condensate Storage Tanks</title>
<link>https://www.cheresources.com/invision/topic/32734-foam-system-criteria-for-hc-condensate-storage-tanks/</link>
<description><![CDATA[Is there any minimum capacity criteria for aboveground storage tanks that do not require foam system provision.
]]></description>
<pubDate>Tue, 28 Oct 2025 06:35:46 +0000</pubDate>
<guid isPermaLink="false">https://www.cheresources.com/invision/topic/32734-foam-system-criteria-for-hc-condensate-storage-tanks/</guid>
</item>
<item>
<title>Are You Still Manually Extracting Data From Drawings</title>
<link>https://www.cheresources.com/invision/topic/32732-are-you-still-manually-extracting-data-from-drawings/</link>
<description><![CDATA[Hi everyone,
I'm wondering how much manual data capture is still happening out in the process industry. In my region, spending countless hours essentially translating information from P&IDs into structured data is common. For example; we manually go through the drawing, identify instrument tags, types, details, etc., and add to instrument index. Similar for equipment and pipelines.
We do all this by hand from the 2D CAD drawings or printed PDFs, not from an intelligent database or linked model.
Do people elsewhere still do this manually? Or is it mostly automated now with intelligent P&ID softwares to automatically extract information and maintain connections to databases? How are you handling the challenge of maintaining data integrity across drawing revisions?
I'm curious what others are experiencing and would love to hear what's working for you.
]]></description>
<pubDate>Mon, 27 Oct 2025 06:49:37 +0000</pubDate>
<guid isPermaLink="false">https://www.cheresources.com/invision/topic/32732-are-you-still-manually-extracting-data-from-drawings/</guid>
</item>
<item>
<title>Chiller Package With Different Footprints</title>
<link>https://www.cheresources.com/invision/topic/32731-chiller-package-with-different-footprints/</link>
<description><![CDATA[Hi,
 
We have two scenarios for chilling package to cool hot water. 
 
Scenario-1 (for Scheme-1 operation):
Hot Water In = 40 degC
Chilled Water Out = 16 degC
Water flowrate = 200 lit/min
Duty required = 350 KW
 
Scenario-2 (for Scheme-2 operation):
Hot Water In = 16 degC
Chilled Water Out = 6 degC
Water flowrate = 480 lit/min
Duty required = 350 KW
 
These two scenarios are based on two different schemes to cool potable water for safety shower and eye wash applications. I'm not going into explaining these schemes because this is irrelevant to my query (if you feel it is required, please let me know. i'll post the full explanation of these schemes also).
 
To select any one scheme we need to have the practical advantages and disadvantages of these scenarios to finalize any one scheme. While discussion with Chiller Package vendor about the advantages of scenario-2 over scenario-1, vendor provided us the feedback that though the duty of both scenarios is same but due to more delta T in  scenario-1 (24 degC) compared scenario-2 (10 degC) footprint for chiller package in Scenario-1 is higher than that for Scenario-2, which is a strong disadvantage of scenario-1 for us and this can be a deciding factor for scheme selection as we are having a limited available plot space.
 
Though we'll ask explanation for this from vendor, i wanted to look for a probable explanation for this higher footprint for scenario-1 from this community - though the duty is same.
 
Thanks.
]]></description>
<pubDate>Fri, 24 Oct 2025 19:45:45 +0000</pubDate>
<guid isPermaLink="false">https://www.cheresources.com/invision/topic/32731-chiller-package-with-different-footprints/</guid>
</item>
<item>
<title>Sizing Of Condensate Return Vessels</title>
<link>https://www.cheresources.com/invision/topic/32729-sizing-of-condensate-return-vessels/</link>
<description><![CDATA[Hello everyone,
 
Could you please share with me any document or your help with sizing a condensate return vessel?
]]></description>
<pubDate>Thu, 23 Oct 2025 15:42:43 +0000</pubDate>
<guid isPermaLink="false">https://www.cheresources.com/invision/topic/32729-sizing-of-condensate-return-vessels/</guid>
</item>
<item>
<title>Urea-Formaldehyde Modeling</title>
<link>https://www.cheresources.com/invision/topic/32719-urea-formaldehyde-modeling/</link>
<description><![CDATA[Hello, 
 
Please can you advise on the most suitable fluid package for modeling UF85 (Urea-Formaldehyde) in Aspen hysys or aspen plus or how can I adjust the binary coefficients (based on what)? I'm not getting the same fluid properties as the MSDS. 
 
Thank you in advance.]]></description>
<pubDate>Tue, 21 Oct 2025 15:25:31 +0000</pubDate>
<guid isPermaLink="false">https://www.cheresources.com/invision/topic/32719-urea-formaldehyde-modeling/</guid>
</item>
<item>
<title>Purge Gas For Centrifugal Compressor</title>
<link>https://www.cheresources.com/invision/topic/32717-purge-gas-for-centrifugal-compressor/</link>
<description><![CDATA[Hello, I'm reviewing some BOG centrifugal compressors P&ID, and it catched my attention a line of gas used as purge gas ( Hc not nitrogen) at the compressor disrcharge ? It says that it’s used for startup .... any idea about this requirement ? When purge gas is needed ? And does it apply for all centrifugal compressors ? Thank you]]></description>
<pubDate>Sun, 19 Oct 2025 18:04:50 +0000</pubDate>
<guid isPermaLink="false">https://www.cheresources.com/invision/topic/32717-purge-gas-for-centrifugal-compressor/</guid>
</item>
<item>
<title>Real Or Ideal Cp/cv For Control Valve Calculations</title>
<link>https://www.cheresources.com/invision/topic/32715-real-or-ideal-cpcv-for-control-valve-calculations/</link>
<description><![CDATA[Hello fellow Chemical Engineers,
 
If one is determining a gas breakthrough scenario through an existing control valve with a high dP (such that the flow will be choked), is it more appropriate to use the 'real' Cp/Cv (e.g. calculated by HYSYS) or the 'ideal' Cp/Cv?
 
I have compared results for both and found that using the 'real' ratio gives a 12 % higher flowrate. For the purpose of my calculation (determining amount of gas breakthrough), the 'real' ratio is more 'conservative'.
 
I would compare this to PSV sizing in which API 520 notes that 'ideal' ratio should be used as it *typically* results in a more conservative design, and that if you are not careful, using 'real' ratio can result in undersized orifices. I have trawled through Annex B of API520, posts in this forum and ENGTIPS (incl <a href='https://www.cheresources.com/invision/topic/13522-psv-sizing/),' class='bbc_url' title=''>https://www.cheresources.com/invision/topic/13522-psv-sizing/),</a>where caveats to the API 520 statement are mentioned (such as that 'ideal' ratios are not always appropriate for a select few mixtures, or when gas is near critical point). I also note ' Using the ideal gas specific heat ratio for relief-valve sizing"; by Aubry Shackelford, Berwanger, Inc.; Chemical Engineering, November 2003.'
 
However, I can't seem to find any information anywhere on CONTROL VALVE SIZING specifically. This includes reading through control valve supplier 'technical bulletins' and the such.
 
Any thoughts?
]]></description>
<pubDate>Tue, 14 Oct 2025 23:03:47 +0000</pubDate>
<guid isPermaLink="false">https://www.cheresources.com/invision/topic/32715-real-or-ideal-cpcv-for-control-valve-calculations/</guid>
</item>
</channel>
</rss>

If you would like to create a banner that links to this page (i.e. this validation result), do the following:

Download the "valid RSS" banner.
Upload the image to your own server. (This step is important. Please do not link directly to the image on this server.)
Add this HTML to your page (change the image src attribute if necessary):

<a href="http://www.feedvalidator.org/check.cgi?url=https%3A//www.cheresources.com/invision/rss/forums/1-front-page/"><img src="valid-rss-rogers.png" alt="[Valid RSS]" title="Validate my RSS feed" /></a>

If you would like to create a text link instead, here is the URL you can use:

http://www.feedvalidator.org/check.cgi?url=https%3A//www.cheresources.com/invision/rss/forums/1-front-page/

Home · About · News · Docs · Terms