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Measure & Analyze: Live Q &A, March 1st from 10am - 10:45am CST

 Welcome! Emerson experts below will be here LIVE on March 1st, 10:00am - 10:45am CST to help you tackle your toughest challenges...

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Best Regards,

Rachelle McWright: Business Development Manager, Dynamic Simulation: U.S. Gulf Coast

• Pressure
• Liquid Analysis
• Wireless
• Level
• Experts
• Temperature
• Flow
• flame & gas detection
• Corrosion
• Measure & Analyze
• Tank Guaging
• Analytical

Rachelle McWright

• 20 Feb 2017 2:14 PM
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51 Replies

• Danny Vandeput

  

  • 1 Mar 2017 3:28 PM

  In reply to Jim Cahill:

  No, WirelessHART only emits 10mW of power and will not interfere with any other communication networks. Further it uses the so called "signal hopping" - means it will always first "listen" before sending any communication on one of the 16 available channels. The best example of not interfering on any comms networks is during Emerson Exchange where 3000 people gather together with all their mobile phones, our WirelessHART networks (15-20 different networks), Plant Wireless,... all without any problem. Danny

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• Natalie Strehlke

  

  • 1 Mar 2017 3:29 PM

  In reply to Rachelle McWright:

  A Vanstone thermowell consists of a two piece thermowell design with a separate barstock stem and lap flange. With this design, stress and corrosion from weld joints are completely eliminated. Additionally, the lack of welds means there is no need for weld documentation. Some additional benefits include:
  • Highest fatigue endurance limit per the ASME PTC 19.3 TW-2016
  • Cost saving potential by allowing a less expensive flange material with an exotic stem (wetted material)

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• Jim Cahill

  

  • 1 Mar 2017 3:30 PM

  In reply to Aaron Napier:

  One of my blog posts, www.emersonprocessxperts.com/.../ had some great questions in the comment section. Here's one I wanted to share, "Would be interested in understanding the errors introduced on high pressure systems. What are the effect of each pressure transmitter’s accuracy when determining the DP between the two. Are we trading one set of accuracy problems for another?"

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• Karl Stappert

  

  • 1 Mar 2017 3:34 PM

  In reply to Aaron Napier:

  Upstream production proving frequency is typically calendar based guided by historic proving results, process conditions (clean vs. dirty or coating), and the meter's diagnostics (if the meter has diagnostics). On custody transfer of batches at pipeline and marine terminals proving is typically performed every batch transfer.

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• Rachelle McWright

  

  • 1 Mar 2017 3:38 PM

  From an LBP, for our Level experts: A customer had a 5402 on a solids application and it worked great. But then they wanted to read down below an area where the tank started necking down. They have a 4" cone antenna. The device is starting to lock on to where the tank necks down. What could help with this?

  Best Regards,

  Rachelle McWright: Business Development Manager, Dynamic Simulation: U.S. Gulf Coast

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• Jim Cahill

  

  • 1 Mar 2017 3:42 PM

  For pressurized LPG spheres, how is the measurement performed since the manual measurement cannot be made in a pressurized tank?

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• Danny Vandeput

  

  • 1 Mar 2017 3:43 PM

  In reply to Rachelle McWright:

  One of the questions that keeps coming back when visiting customers and talking about wireless is about the power module life – will I need to replace them regularly?
  
  Emerson uses Lithium-Thionyl Chloride power module which have an expected life time of 10 years. Depending on your measurement interval (and to a lesser extend temperature) this can be reduced. For average monitoring purposes the life time is between 5-10 years with associated update rates of 32 / 16 / 8 seconds (depending on device). Important to know is that the power modules have a shelf life of 10 years (they do not lose capacity) and that they are intrinsically safe.

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• Shane Hale

  

  • 1 Mar 2017 3:44 PM

  In reply to samcmiller:

  G'day Sam. Interesting question. We have seen only a few requests regarding SIL ratings for analyzers used for process control and gas quality, and they have been more general rather than specific. Because of the measurement technology used in traditional analyzers, they are not easily SIL rated. However, the laser based analyzers (such as the Cascade QCL/TDL analyzers) use technology that could be SIL rated, theoretically. We have not seen a direct request for this, yet, but I would think applications like the Acetylene converter in the Ethylene process could potentially benefit from a SIL rated analyzer.

  Shane Hale | Global Business Development Director - Rosemount Wireless | Emerson Automation Solutions

  shane.hale@emerson.com | T +1 952 204 4737 | M +1 713 447 2839

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• Jim Cahill

  

  • 1 Mar 2017 3:45 PM

  One more from what I saw in a LinkedIn group, "Are vortex meters suitable for use in gas custody transfer applications and is there a standards organization working on publishing a standard."

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• Ulf Johannesson

  

  • 1 Mar 2017 3:46 PM

  In reply to Jim Cahill:

  Good questions Jim! The Rosemount 5900 series radar level gauge for LPG / LNG tanks is supplied with a verification kit which is installed in the measurement pipe during commissioning. With the tank in operation the accuracy of the radar measurement can be verified against the known position of the verification pin. The radar measures the position of the pin, without stopping the normal level measurement. //Ulf

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• Wally Baker

  

  • 1 Mar 2017 3:47 PM

  In reply to Jim Cahill:

  When using DP Level measurements in a high static pressure applications, and you are using 2 static pressure transmitters (one at the high tap and one at the low tap) and try to subtract the difference you often can have challenges getting the accuracies needed for a good measurement. Also if there are process surges in the measurement, it is important that you synchronize your measurements. When using 2 different transmitters this isn’t possible. But if you use an ERS system, the digital communication between the 2 transmitters synchronize these measurements to reduce these effects. If you use a system such as ERS that can withstand significant high static applications.  Also Differential Pressure transmitters are widely used for this application.  With these DP transmitters the high pressurizes effectively push equally on both of the pressure taps. Most DP pressure transmitters can withstand very high static pressures with very little static pressure effects.

  http://www.emerson.com/en-us/automation/measurement-instrumentation/pressure-measurement/about-differential-pressure-dp-level-measurement/about-rosemount-3051s-differential-pressure-dp 

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• Edward Naranjo

  

  • 1 Mar 2017 3:47 PM

  I wonder if anyone has any comments on the typical amount of time it takes to maintain toxic gas sensors. Is it usually 15 or 30 minutes? What effect does such maintenance routine have on the devices' availability?

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• Karl Stappert

  

  • 1 Mar 2017 3:48 PM

  In reply to Jim Cahill:

  Some vortex meters easily meet custody transfer requirements of 1% accuracy in measuring gas. The American Petroleum Institute is in the process of publishing API MPMS Chapter 14.12 – Measurement of Gas by Vortex Meter, publication is expected in 2017.

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• Shane Hale

  

  • 1 Mar 2017 3:53 PM

  In reply to Shane Hale:

  Ramesh,
  Here's a quick list of standards that I refer to often:
  GPA 2261-00 analysis for Natural Gas and Similar Gaseous Mixtures by Gas Chromatography
  ISO 6975 - Extended Analysis Gas Chromatographic Method
  ISO_10723-2012 - Natural gas — Performance Evaluation for Analytical Systems
  ISO _23874_(E) - Determination of HCDP with GC
  ISO-6974 Natural gas -- Determination of hydrogen, inert gases and hydrocarbons up to C8 -- Gas chromatographic method
  Regards,
  Shane

  Shane Hale | Global Business Development Director - Rosemount Wireless | Emerson Automation Solutions

  shane.hale@emerson.com | T +1 952 204 4737 | M +1 713 447 2839

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• Rachelle McWright

  

  • 1 Mar 2017 3:55 PM

  Thanks to everyone who joined us today, we'll be closing the LIVE conversation momentarily. If you have additional questions, you may post them here in this thread OR in the respective Measure & Analyze Group in the Community. You can find those groups in the navigation on this page: emersonexchange365.com/.../

  Best Regards,

  Rachelle McWright: Business Development Manager, Dynamic Simulation: U.S. Gulf Coast

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