Flow Measurement & Control

Non-welded ultrasonic flowmeter installation

April 2003 Flow Measurement & Control News

Danfoss has developed an aid/joint assembly, the 'Tapping Band', as an ultrasonic flowmeter solution that provides a highly accurate means of fixed installation of flowmeters on water or wastewater piping, especially where the pipe material does not allow the conventional welding of the flowmeter fittings.

Simple to install, the Danfoss Tapping Band is a flexible stainless steel band, modelled on a pipe repair clamp, which is installed around the pipe in two or more sections. Each section has a specially developed rubber mat bonded to the steel sheet. At the point of mounting of the transducer, the mat has extra concentric sealing rings, which provide total security and long-term stability to the band. The sections are coupled at rigid, high-strength joints, with a suitable number of evenly spaced torqued studs, which ensure optimal sealing over the full band surface and thus prevent failure due to stress concentration. An optional pressure tapping point can be fitted, and with the Danfoss pressure transmitter MBS33 provides multifunction flow metering for water distribution networks.

Clamping a small pressure plate secured with two cables/straps over each hole - as is commonly done - does not allow for optimum efficiency in pressure monitoring, as the cables concentrate stress at their contact lines and can create a 'cheese cutter' effect causing the pipe to fail around its circumference. In contrast, the Tapping Band forms an effective protection against future pipe failure.

The Tapping Band SONOFLO ultrasonic flowmeter is an accessory for 'non-welded' applications and was designed for use on cast iron or ductile iron pipes, concrete or fibreglass pipes and aging steel pipes where welding/drilling could cause premature failure. The SONOKIT Tapping Band can be mounted on empty pipes or hot tapped without process shutdown, and is available in sizes ranging from DN 80 to DN 4000.

SONOKIT is neatly packaged with all the necessary components for fast and easy installation
SONOKIT is neatly packaged with all the necessary components for fast and easy installation

"The SONOKIT system is not a modified repair clamp, but a complete flowmeter accessory," says John Alexander, Danfoss South Africa product manager - motion controls and flow. "The Tapping Band is fabricated in our manufacturing works to project specifications, after which the exact flowmeter geometry is measured and recorded. The geometry parameters are related to the final installation via the gaps between sections."

Tapping Bands have been used in many applications, previously considered otherwise difficult or impossible installations. This includes installation on old, brittle cast iron pipes where welding would cause cracking, including applications where the removal of existing clamps leaves holes in the pipe, which the Tapping Band effectively seals during installation of the ultrasonic flowmeter. In addition, Danfoss has successfully installed its SONOKIT system using hot tap tools at one of the largest copper mines in the world and in numerous water installations in Australasia.

The Danfoss Tapping Band is a professional solution that not only brings accuracy to flow and pressure monitoring in water and wastewater applications, but also opens up new opportunities, as it expands the possibilities for applying ultrasonic flowmeters to practically any location and pipeline style.

For more information contact Mick Baugh, Danfoss, 011 803 8390, baughm@danfoss.co.za, www.danfoss.co.za


Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Danfoss completes acquisition of Eaton’s hydraulics business
September 2021, Danfoss , News
Danfoss has officially finalised its US$3,3 billion acquisition of Eaton’s hydraulics business, following confirmation of all necessary regulatory approvals and closing conditions.

Safe supply in CNG operations
September 2021, SICK Automation Southern Africa , Flow Measurement & Control
The Flowsic500 compact ultrasonic gas meter enables extremely accurate natural gas distribution measurement.

Enabling SMEs to build back better
Issue 5 2021 , Editor's Choice, News, Conferences & Events
Simpli ConnectED podcast series addresses the demands placed on SMEs in the current economic climate and offers suggestions for keeping the wheels turning.

Accurate flow measurement on a conveyor
August 2021, SICK Automation Southern Africa , Flow Measurement & Control
Heidelberg Cement in Lengfurt, Germany, needed a solution for the accurate metred supply of secondary material on its conveying system.

Flowmeter with IO-Link
August 2021, GHM Messtechnik SA , Flow Measurement & Control
The calorimetric measuring principle makes this new Honsberg meter practically wear-free and gives users the ability to record media temperature in addition to flow measurement.

Electronic flow switch with display
August 2021, WIKA Instruments , Flow Measurement & Control
The new model FSD-4 electronic flow switch from WIKA offers full flexibility in monitoring and controlling flow based on the velocities of liquid media.

Supermarkets heat stores with surplus energy from refrigeration units
Technews Industry Guide: Sustainable Manufacturing 2021, Danfoss , Electrical Power & Protection
With climate change and the pressure for lower environmental impact, supermarkets are rapidly investing in green energy transition.

Key factors for picking the optimal flowmeter
July 2021, KROHNE , Flow Measurement & Control
While a variety of factors impact meter performance, the most common culprits are flawed sizing and failing to choose the most appropriate technology.

PoPIA: De-identifying, matching and filing
Issue 3 2021 , Editor's Choice, News, Security Services & Risk Management
Three of the crucial areas in organisational PoPIA compliance that must be discussed include de-identifying, information matching programmes and filing systems.

Top cybersecurity considerations for SMEs in 2021
Issue 3 2021 , Cyber Security, News
Cisco has published its 2021 SMB Security Outcomes Study, highlighting what SMB leaders are doing to thrive in today's ever-evolving threat landscape, as well as offering actionable insights on where they should focus.