Versatile gas analyzer meets refinery application requirements

Density, specific gravity and percent concentration are important gas measurements throughout the crude oil refining process. Conoco-Phillips' Roxanna and BP's Texas City are among the refineries using Yokogawa's GD402 gas analyzer.

11/20/2003



Density, specific gravity and percent concentration are important gas measurements throughout the crude oil refining process. Conoco-Phillips' Roxanna and BP's Texas City are among the refineries using Yokogawa's GD402 gas analyzer .

Using the tuning fork principle, the GD402's detector directs a continuous gas sample through a chamber containing a resonating tube. Different sample gas densities allow the resonating tube to vibrate faster or slower, thus gas density is determined by the frequency of the resonating tube.

The vibrating element type, gas measurement does not require reference air, is not effected by the temperature of the sample gas or ambient temperature, is resistant to the common problem of oil misting, and is fast and accurate.

Conoco-Phillips' Roxanna refinery's technical analyzer specialist, David Crocket, says, ''The GD402s work better than the products we were using and the specific gravity output provides a good backup measurement to our gas chromatograph BTU measurements.''

BP's Texas City refinery replaced mechanical gravitometers, which use purely mechanical means to make the measurement, with GD402s. ''The old instrument was a nightmare to maintain, it had too many veins, the belts broke and we were uncertain of the accuracy. The GD402 is believable, and has temperature and pressure compensation,'' says BP, Texas City analyzer supervisor Neil McDuffy.

—Dave Harrold, Senior Editor, Control Engineering, dharrold@reedbusiness.com





No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Big Data and IIoT value; Monitoring Big Data; Robotics safety standards and programming; Learning about PID
Motor specification guidelines; Understanding multivariable control; Improving a safety instrumented system; 2017 Engineers' Choice Award Winners
Selecting the best controller from several viewpoints; System integrator advice for the IIoT; TSN and real-time Ethernet; Questions to ask when selecting a VFD; Action items for an aging PLC/DCS
This digital report will explore several aspects of how IIoT will transform manufacturing in the coming years.
Motion control advances and solutions can help with machine control, automated control on assembly lines, integration of robotics and automation, and machine safety.
This article collection contains several articles on the Industrial Internet of Things (IIoT) and how it is transforming manufacturing.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

Future of oil and gas projects; Reservoir models; The importance of SCADA to oil and gas
Big Data and bigger solutions; Tablet technologies; SCADA developments
SCADA at the junction, Managing risk through maintenance, Moving at the speed of data
Automation Engineer; Wood Group
System Integrator; Cross Integrated Systems Group
Jose S. Vasquez, Jr.
Fire & Life Safety Engineer; Technip USA Inc.
click me