KROHNE Altosonic V12 Specifications

ALTOSONIC V12

Technical Datasheet

12-chord ultrasonic gas flowmeter for custody transfer

• 10-reflection chords for the highest possible accuracy; 2-reflection chords for

extra diagnosis options

• Built-in redundancy through dynamic chord substitution

• Performance monitoring and fouling detection

ALTOSONIC V12

Ultrasonic gas owmeter for custody transfer

As times change, so do the requirements for ultrasonic meters. Today it is assumed that an ultrasonic device
measures accurately and precisely, but what about long-term reliability? After all, this depends on more
than just the ultrasonic meter itself. The transferred effect of the high pressure calibration on the installation
conditions in the measuring station and dirt, which may collect on the meter over time, can also have a
negative effect.

The unique chord arrangement of the ALTOSONIC V12 enables it to generate diagnostic data for places

where traditional ultrasonic meters gathered too little information or none at all: rstly at the pipe wall itself,
scanning with reection. Secondly, in close proximity to the pipe wall, using the geometrical arrangement of

the outer chords. Thirdly, at the bottom of the pipe. This data is gathered using a separate diagnostic chord.

This extremely extensive diagnostic data allows the ALTOSONIC V12 to carry out self-monitoring, which sets

the standard for other devices in terms of performance monitoring.

Highlights

• 12-chord design

• High reliability with built-in redundancy

• Swirl compensation in each measuring plane

• Transducer replacement under pressure

• Bi-directional ow measurement

• Fully encapsulated cabling

• Field display for main functions

Industries

• Oil & Gas

• Petrochemical

Applications

• Offshore FPSO and platforms

• Onshore exploration

• Transmission

• Underground gas storage (UGS)

• Distribution

• Large gas intakes, for example for

power stations, petrochemical industry,
aluminum smelters, etc.

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Inlet / outlet run requirements

Without Flow Conditioner

With KROHNE Flow Conditioner

ALTOSONIC V12

Under specic conditions ALTOSONIC V12 can be installed with just 5D
and no ow conditioner, please consult KROHNE if this option is required.

Where traditional ultrasonic ow meters typically require 10D straight inlet piping with a ow conditioner or
20D without a ow conditioner, ALTOSONIC V12 only requires 5D with ow conditioner or 10D without ow

conditioner. This not only minimizes the weight and footprint of the installation, but also saves on installa­tion- and shipping costs, both during new installation as well as during re-calibration.

This much shorter installation length permits planning of more compact new metering runs and slot-in
replacement of conventional meters such as turbines during revamps.

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ALTOSONIC V12

Functions

Device Ultrasonic gas owmeter

Description ALTOSONIC V12 consists of a meter body with ultrasonic transducers

and a converter box for signal processing and counter display mounted

on top of the meter body

Measurement functionality Actual volume ow rate and totalized volume; bi-directional

Applications Natural gas with a minimum of 75% methane, other applications on

request

Nominal diameter

[mm] 100,150,200,250,300,350,400,450,500,600,750, 00,1000,1200,1400,1600,

others on request

[inches] 4”, 6”, 8”, 10”, 12”, 14”, 16”, 18”, 20”, 24”, 30”, 36”, 40”,42”, 48”, 56”,

64”, others on request Other diameters on request

Measurement accuracy

Accuracy
(relative to calibration facility)

Repeatability ≤ ±0.1%

≤ ±0.5% of measured value, uncalibrated
≤ ±0.2% of measured value, high-pressure ow calibrated
≤ ±0.1% of measured value, high pressure ow calibrated and

linearized

Operating conditions

Flow range See ow table (last page)

Pressure 4...450 bar / 0.4...45 MPa / 60...6525 psi

Ambient temperature -40...+60°C / -40…+140°F

Process temperature -20...+100°C / -4…+212°F (-40…+100°C / -40…+212°F optional)

Wet gas content Contact KROHNE

content Contact KROHNE

CO

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Materials

Flanges Low temperature carbon steel A350 LF2, stainless steel, duplex

Measuring tube Low temperature carbon steel A350 LF2 (≤ 12”) or A333 GR6 (≥ 14”),

stainless steel, duplex

Electronics housing Stainless steel A316

Finish Outside: 3-layer epoxy coating RAL 9006 (silver)

Inside: corrosion preservative oil lm
other nishes on request

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