Emerson announces the Rosemount Analytical SPS 4001B, IMPS 4000 and MPS 3000 self triggering autocalibration systems for in-situ oxygen analysers

Emerson Process Management announces the Rosemount Analytical SPS 4001B, IMPS 4000 and MPS 3000 self triggering autocalibration systems for in-situ oxygen (O2) analysers. When used in combination with the unique features of the Rosemount Analytical Oxymitter and World Class 3000 analysers, these cost-effective sequencers ensure that O2 measurements are always accurate without having to manually initiate calibrations - safely keeping workers off the stack and operations running at optimal efficiency. The SPS 4001B Autocalibration Sequencer is designed for single probe applications, whereas the IMPS 4000 and MPS 3000 Multiprobe Autocalibration Sequencers are designed for applications with up to four O2 probes.

The units can be easily added to existing oxygen installations and are equipped with HART digital communications, enabling the user to set up, calibrate and troubleshoot from any location where the analyser 4-20 mA signal is terminated and accessible.

The industry-leading diagnostics and advanced communication capabilities of Rosemount Analytical gas analysers are part of the broad Emerson range of intelligent, digital field devices that power PlantWeb digital plant architecture.

Further cost savings, increased plant availability, and enhanced safety and environmental compliance are achieved when these analysers are integrated into PlantWeb architecture.

The autocalibration systems in the SPS 4001B take full advantage of the unique Oxymitter 4000 'Calibration Recommended' diagnostics.

Once an hour, the Oxymitter initiates an on-line impedance measurement of the sensing cell, which directly correlates to the cell accuracy.

When necessary, this feature triggers a fully automatic calibration via the SPS 4001B, ensuring the O2 measurement is always accurate and eliminating needless and costly 'time in service' calibrations.

The SPS 4001B features an IP56 (NEMA 4X) enclosure with fully accessible subcomponents for convenient maintenance.

The IMPS 4000 (ideal for Oxymitters) and MPS 3000 (ideal for World Class products) are designed to provide automatic calibration in applications with up to four O2 probes - taking full advantage of 'Calibration Recommended' diagnostics available on Rosemount Analytical in-situ O2 probes.

Both systems feature an IP56 (NEMA 4X) enclosure and can accept voltages from 85-264 V, 50/60 Hz.

The SPS 4001B, IMPS 4000 and MPS 3000 provide many benefits when used with applications using O2 probes, these include minimised installation/maintenance costs and remote calibration.

Witt Gas Techniques will be exhibiting gas distribution, mixing and analysis equipment for use on Modified Atmosphere Packaging lines at the Total Processing and Packing Exhibition in May 2007

Witt Gas Techniques, the Warrington based gas safety, control, mixing and analysis equipment supplier will be exhibiting on stand 5417 at the Total Processing and Packing Exhibition at the NEC in Birmingham from 15-18 May 2007. The company will be exhibiting and demonstrating their range of gas distribution, mixing and analysis equipment for use on modified atmosphere packaging (MAP) lines. This equipment will include a brand new fully automated Leak-Master Inline, part of a series of micro-leak detection systems for finding the smallest leaks in individual flexible and rigid food and pharmaceutical packaging based on CO2 detection technology.

This new leak detector is a flexible conveyor system able to check for leaks on single packs, multiple packs and boxed items using an adjustable testing chamber.

Other equipment on show will include the portable 'Leak-Master', a modified atmosphere food packaging (MAP) micro-leak detection system based on CO2 detection technology to find leaks in individual flexible and rigid food packaging.

It has a new touch screen interface and high memory capability, storing settings for up to 1,200 different products as well as names and passwords for 60 users.

A low cost, 'Pack-Vac' leak detection system able to detect leaks in individual packages without the need for any trace gases.

Pack-Vac uses only water and compressed air to detect any leaks and is designed for use with most flexible and rigid packaging found in modified atmosphere packaging as well as other industrial packaging.

Oxybaby V, a hand held gas measuring and analysing system plus a new Oxybaby M for those packaging companies, who still require mobility in their packaging inspection but do not have the need to record measured results and without the requirement to export logged data via an interface to a computer, a feature that is supplied as standard on the Oxybaby V version.

Oxybaby M can be used not only on packaging lines, but in laboratories and stores and is designed to measure the O2 and CO2 content of the smallest individual food packages, such as salami, cheese slices and snacks as well as other food packaging including poultry and salads.

Brenntag Oil and Gas Europe will be attending the ONS exhibition to show its capabilities in pipeline cleaning and maintenance with the advanced chemical cleaning technology 'N-Spec'

Brenntag Oil and Gas Europe will be attending the ONS exhibition to show its capabilities in pipeline cleaning and maintenance with the advanced chemical cleaning technology N-Spec. An important advantage of the technology is that it can be applied online, reducing downtime and production losses. N-Spec environmentally friendly cleaning chemistry and supporting technology offers many benefits and reduced risks compared to mechanical pigging, which can result in cost reductions, more reliable integrity checks of pipelines and increased operating capacity.

We would be delighted to see you at the Brenntag stand, Nr 1077, Hall J, to discuss this topic in further detail.

In 2005, Brenntag Oil and Gas Europe achieved success with its pipeline cleaning chemical N-Spec 50 that has been approved by UK and Norwegian authorities to be used offshore.

At the beginning of 2006, Brenntag was successful in unplugging an offshore 7.3km, 65/8'' crude trunk line, which had been obstructed for six years, with N-Spec 50 dispersant/solvent.

Just recently they opened another crude oil pipeline of 2.5 km and 4'' in Vaudoy-en-Brie, France.

The Brenntag Oil and Gas Team manages a full line of products and services to the oil and gas producing and processing industries.

In 2005, Brenntag succeeded worldwide again in underpinning its position as a globally leading chemical distributor.

The company recorded external sales of EUR 5.3 billion (US$ 6.6 billion).

Brenntag operates more than 300 locations with 9,200 people in 50 countries.

If you are interested in discussing how Brenntag Oil and Gas chemicals can bring added value to the Oil and Gas industry or if you require more information, please visit us at ONS Exhibition for an initial discussion.

The first commercial implementation of Platelet Technology for pipeline leak sealing was in September 2004 on a subsea water injection pipeline on the BP Foinaven field

The first commercial implementation of Platelet Technology for leak sealing was in September 2004 on a subsea water injection pipeline on the BP Foinaven field. The leak was located just downstream of a complex pipeline connection, therefore traditional sealing methods, such as clamping, were not favourable. A solution was required to last over the winter period until a planned shutdown in spring 2005 (6-9 months).

In order to minimise the number of Platelets to be injected Computational Fluid Dynamics was used to ascertain the behaviour of the Platelets in the vicinity of the leak.

A full scale flow loop was then constructed to enable these results to be physically tested.

Further chemical and mechanical tests were then carried out to test the integrity of the seal and to enable it's longevity to be predicted.

The next important stage was to design the Platelet injection and retrieval systems which also required thorough testing prior to offshore implementation.

The Platelet deployment was a complete success, the leak having been sealed within 24 hours from the start of the offshore operation; and although originally specified for a life in service of 6-9 months the Platelet seal is still fully operational over 16 months later.

Have you ever seen fire ants excitedly swarming over a dropped sandwich? At first glance, you might believe that you were looking at a bunch of ants running around with no organization or direction to their movements. Take another look a few minutes later and you will see that the sandwich is noticeably smaller. Each of those ants has a purpose and an objective. They are working as a team to disassemble and transport the sandwich to a specific place. A unit shutdown has a similar appearance. First glance shows group of workers swarming over a piece of equipment with no organization or direction. But, like those ants, each worker knows what he is expected to do. Many hours of planning and preparation preceded the start of maintenance. By the time the workers swarm the unit, the job has been planned and organized down to the number of man-hours it will take to finish the task.
Although Coriolis mass flow meters are not always included in the planning of a shut down, this may be a good time to perform some preventative maintenance on the critical flow meters. You may have heard that Coriolis meters are so dependable that they should work forever with no attention. In reality, as long as man makes Coriolis meters using man-designed machines there will be a few that perform a little outside factory specifications. Shut downs are an opportunity to check and calibrate your critical flow meters. The best way to calibrate a Coriolis meter is to remove the meter, clean it and send it to a facility that has a gravimetric calibration flow laboratory. In place "proving" may be acceptable for applications that do not require great accuracy, but for a critical measurement, there is no substitute for direct mass-to-mass calibration. Master meter comparators and "inferred-mass" volumetric provers cannot approach the accuracy of a gravimetric facility. Mass Flow Technology in Baytown, Texas has a gravimetric flow calibration laboratory with 0.052% system uncertainty. Some factories have equivalent facilities for calibrating production meters and may provide certified calibration services for customer meters.
If your process fluid is likely to coat or plug, check the meter for internal deposits. Deposits on the inner flow tube walls will degrade meter accuracy. Decontaminate the flow element and use a bore scope to check for deposits inside the flow tubes. If deposits are found, a good hydro-cleaning company can clean the flow tubes. Mass Flow Technology has had considerable success is cleaning Coriolis flow meters that are plugged with set-up concrete.
You don't have to wait for a shut down to keep up with basic and periodic maintenance. Several valuable checks can be made on Coriolis meters during normal operating times. Flow meter zero (the flow meter output during non-flowing conditions) can be checked any time the process flow can be blocked for a few minuets. When process flow is blocked, the flow meter should indicate zero flow. The procedure is simple. Close the upstream and downstream valves and read the flow rate. The best time to check the meter zero is immediately following a batch, not before the batch. The process should be stabilized to operating conditions and entrainment should be purged. Also, make sure any parameters that determine a flow cutoff threshold is set to "0.0" before checking the meter zero. After checking the meter zero, return the original cutoff threshold parameter.
Periodic checks can be a valuable indicator for conditions that gradually grow from nothing into a big problem. Most manufacturers have test points that can be measured and compared to previous checks made under similar conditions. Make a chart for recording these test points and compare the most recent checks to past checks. This may show a trend.

What is the Coriolis Principle?

To some of us the Coriolis Principle is an exact science, but to most of us it is still a black art. Well, imagine a fluid flowing (at velocity V) in a rotating elastic tube as shown below. The fluid will deflect the tube.

Further, consider a Mass M moving from the center to the edge of a rotating plate.
This Mass M will take path B as shown below

If the mass M is guided by Wall A (i.e. the tube), a Coriolis Force will be exerted on the wall as shown below.
CORIOLIS FORCE : Fc = -2 M V W
Now, consider the interior of the RotaMASS sensor as shown below

The tube walls guide the process fluid as it flows through the U-Tube pathway. With no fluid inside the tubes the Driver excites the tubes apart at a nominal 150Hz as shown below.

No Flow: Parallel Deflection

Mass Flow: Coriolis Twist

Now imagine fluid of Mass M flowing through and out of the RotaMASS tubes. As the fluid flows down the first half of the U-Tubes it will tend to deflect the tubes in towards each other. Conversely, when the fluid flows up the second half of the U-Tubes it will tend to deflect the tubes out away from each other. This Coriolis Twist action is shown above.

Now consider the diagram below. The baseline deflection of the tubes from the Driver is shown by the blue trend and the Coriolis Twist from the Pickup Coil is designated by the red trend.

Now the temperature of these tubes dramatically affects their flexibility. So temperature measurement is very critical as follows;

The Mass flow equation for the RotaMASS can be described as follows;

Where,

M Ac Ae Ac/Ae Sk Sk(20°C) fv Skt

= Mass flow rate = Amplitude of coriolis oscillation = Amplitude of excitation oscillation = Phase Angle = Sensor constant (calibration constant) = Sk(20°C) (1+Skt x (T-20°C)) temperature correction = Sensor constant at 20°C = Excitation frequency = Temperature correction coefficient (material constant)

The Density equation for the RotaMASS can be described as follows;

p fI(20) fv(20) KD fv(20) FKT

= Density = Exciting frequency of the empty tubes at 20°C = Exciting frequency of the filled tubes at 20°C = Density calibration constant = fv / (1+FKT (T - 20 °C)) temperature correction of the actual frequency = Temperature correction coefficient, depending on material and size