ROUND UP
In general usage, LPG (Liquefied Petroleum Gas) refers to propane,
butane and their mixtures which remain liquid at room temperature
under relatively low pressure. It occurs as a by-product in crude oil
refining and as an associated gas in the exploitation of crude oil and
natural gas. Liquefied gas, in contrast to crude oil, is not transported
via pipelines but in large sea-going vessels, small barges, railway
tank wagons and road tank vehicles to dealers or also directly to the
liquefied gas tanks or vehicle gas stations of the final consumers.The
low pressure of propane and butane make this flexible transport of
liquefied gas possible.
Application challenges
At normal temperatures and pressures, LPG evaporates and is,
therefore, stored in pressurised steel tanks. The tanks are only filled
between 80 and 85% of their capacity to allow for thermal expansion.
The volume ratio of vaporised gas to liquefied gas varies depend-
ing on composition, pressure and temperature, but typically ranges
around 250:1. LPG can be stored under high pressures in mounded
bullets or in cryogenic tanks in negative temperatures. Thanks to
the wide range of high-quality tank gauging as well as safety instru-
mentation, the expertise in project management, system integration,
third-party supply, service and training, Endress+Hauser is able to
act as one-stop solution provider to increase productivity and lower
costs of complete tank farms and terminals.
Solution
Endress+Hauser has implemented a complete inventorymanagement
solution for mounded bullet tanks combining both the measuring
accuracy and the highest safety standards.
The
Endress+Hauser
Tank and Terminal Management solutions
can be fully integrated into your business networks for the highest
degree of transparency in your processes, which in the end leads to
higher customer satisfaction and an increase of revenue and profit.
Enquiries: Hannes Ackermann.Tel. 011 262 8000
or email
Fluke Corporation
has introduced the new 1 551 A Ex and 1552A EX Stik Ther-
mometers, engineered to give temperature calibration specialists the durable,
intrinsically-safe digital instrument they need for precision temperature calibra-
tion. The Fluke 1551A and 1552A Stik thermometers provide a highly precise
and durable digital replacement for mercury-in-glass thermometers. They are
intrinsically safe (ATEX and IECEx compliant), so they can be used safely where
potentially explosive gases may be present. More durable than mercury-in-glass
instruments, they can be used reliably outdoors or on the production floor.The
1551A Stik Thermometer covers a temperature range of –50°C to 160°C. The
model 1552A Ex covers a range of –80°C to 300°C. Both models are accurate
to ± 0,05°C over their full temperature range. Process manufacturers of chemi-
cal, pharmaceutical, food or petroleum products require accurate temperature
measurements. Since temperature sensors are subject to drift with time, regular
calibration or verification against a reliable reference thermometer is required.
Finding a reference thermometer that is accurate, repeatable and robust was
a challenge to the manufacturer. Although accurate and repeatable, mercury
thermometers are fragile.The risk of a mercury spill poses potential hazards to
the environment and to health. Many of the United States and European Union
countries have banned their use in industrial
applications. The stainless steel probe and
digital readout of the Fluke 1551A Ex/1152A
EX Stik Thermometers are fixed together
and calibrated as a system. The accuracy
specification is easy to understand since it
includes all uncertainty components, includ-
ing drift, for up to one year.The large backlit
LCD display rotates 90 degrees, making for
easy reading from any angle.
Enquiries:Tel. 011 608 8520 or
email
Tank farm inventory management system for LPG mounded bullet tanks
Ultrasonic stack gas flow meter
New ‘gold standard’ of industrial
temperature calibration
FLOW MEASUREMENT + INSTRUMENTATION
According to regulations, pollutant emissions of
industrial plants should be monitored, and for mass
determination of the pollutants, the exhaust gas should
be measured with the help of a measuring device.
The Durag D-FL 200 flow meter is an ultrasonic flow
measurement system which works on the acoustic
pulse differential method for pollutant emissions of
industrial plants. The D-FL 200 measuring system
continuously determines the flow velocity and the
flow rate of the stack gasses in-situ.The flow meter is
suitable for velocity and volume flow measurementat
power plants, steam plants, at facilities for cement
production, sugar mills and at any gas, oil, coal or
co-firing combustion plant.The measurement system
is especially designed for flow monitoring below the
dew-point and for aggressive gases. The sensors are
completely decoupled from the gas by means of purge
air. The D-FL 200 measuring range is up to
8 m and the temperature range is 0 - 250°C.
Durag is represented locally by
OEN
Enterprises
.
Enquiries: Mike Andrews.
Tel. 011 675 4447 or email
Electricity+Control
July ‘14
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