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Hoffer Insertion Meters Used for Leak Detection in Pipeline
Hoffer Flow Controls continues to supply many "insertion"
type turbine flowmeters to the petroleum pipeline industry.
This type of meter is commonly used for leak detection and
not custody transfer. Custody transfer applications are addressed
with ?in-line? axial flowmeters such as the Hoffer API Series.
Leak detection flow applications, for checking the integrity
of the pipeline, can be addressed with the HP Series of insertion
turbine flowmeters.
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The principle of operation for an insertion type turbine
flowmeter is much the same as an in-line turbine flowmeter.
The insertion meter includes a rotor assembly and pickup
coil. The flowmeter measures velocity at a specific
point in the fluid stream. Volumetric flow can be inferred
provided the I.D. of the line is known. Accuracies can
approach ±0.25% depending on the type of transmitter
specified with the flowmeter.
Insertion Turbine Meters provide multiple advantages
when compared both to in-line turbine flowmeters and
other types of flowmeter technologies. These advantages
include low cost, negligible pressure drop, low installation
costs, minimal potential points of leakage, and avoidance
of high pumping costs. Additionally, the HP insertion
turbine flowmeter can be specified for use in velocities
up to 50 FPS. This allows pipeline companies to move
a maximum amount of product in the shortest time possible.
Leak detection and pipeline integrity is not only essential
to the bottom line for the pipeline company, it is an
environmental issue. In California, in particular, Hoffer
has supplied insertion turbine flowmeters for pipeline
integrity verification. Many of the petroleum products
being measured include the additive MTBE. Proper selection
of the flowmeter seal is essential for any application,
however, is sometimes more challenging with various
additives factored into the equation. Hoffer has successfully
specified and supplied the insertion turbine flowmeter
for a wide cross section of pipeline applications.
The HP Series flowmeters are available in both low pressure
and high pressure versions. The unit produces a frequency
pulse output. Hoffer can supply either a pulse producing
preamplifier or an analog signal converter with the
HP meter. The recent introduction of the HIT-1 smart
signal converter allows user to take advantage of the
excellent repeatability of the HP flowmeter.This means
that users can achieve ±0.25% linearity over
a 10:1 flow turndown range when they specify the HIT-1
transmitter with the HP insertion turbine flowmeter.
Whether your flow application calls for a linearity
of ±0.15%, ±0.25%, ±0.5% or ±1%
turbine flowmeter, call us. We design and manufacture
a wide variety of turbine flowmeter solutions for gas
and liquid applications. Let us put our flow expertise
to work for you |
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