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BWT - Bundle Waveguide Technology System

BWT - Bundle Waveguide Technology System

System For Cryogenic LNG and other Extremely Low or High Temperature Ultrasonic Flowmeter Applications

The Bundled Waveguide Transducer (BWT) System, a technological innovation in ultrasonic flow measurement, is the key for flow measurement in Liquified Natural Gas (LNG) in large pipes. The robust BWT System is the proven solution for cryogenic LNG applications, including the outlet of liquefaction trains and off-loading from ships to storage tanks. In addition to these low-temperature applications, the BWT System is the leading technology for measuring liquids in extreme conditions, including high-temperature, low-density and high-temperature, and highly viscous liquids. Although the installation is wetted, BWT transducers are obstructionless, producing no pressure drop or flashing in the system. The BWT System is compatible with most GE Sensing Panametrics liquid or gas ultrasonic flowmeters. Installations last virtually forever since there are no moving parts.

BWT transducers are available in a single-buffer design, or a double-buffer design for higher temperatures. The buffer is a collection of bundled cylindrical elements that provide a path for the ultrasonic signal to travel from the transducer to its wetted tip. This design provides two major advantages. First, keeping the piezoelectric element of the transducer away from the process keeps the element near ambient temperature, thus preventing any potential for temperature damage. Second, bundling the elements allows transmission of a highly collimated beam of ultrasound into the fluid.

 

  • Noninvasive wetted transducers
  • For liquids or gases
  • For pipe sizes ranging from 6 in. to 42 in. (150 mm to 1050 mm)
  • Single-buffer design from -328°F (-200°C) to 572°F (300°C)
  • Double-buffer design to 1112°F (600°C)
  • 316L Materials Standard and options for other materials
  • Pressures to 240 barg
  • Certified to CENELEC EEx d IIC T6

The Bundle Waveguide Technology (BWT) system is a mechanical component of wetted liquid and gas ultrasonic transducer installations for high-temperature and high-pressure flow measurement of:

  • Hydrocarbon liquids
  • Residual flows
  • Natural gas
  • Steam
  • LNG (liquified natural gas)

Transducers

Designation BWT1
Material 316L stainless steel
Mounting 1 1/4 in straight UN thread
Connectors
  • Standard: BNC
  • Optional: Submersible
Temperature –58°F to 212°F (–50°C to 100°C)
Frequencies
  • 200 kHz for gases and steam
  • 500 kHz or 1 MHz for liquids, depending on the application

Flanged Buffer Assemblies

Service Liquids, gases and steam
Mountings Lap joint flange, RF, 1.5 inch, 150#, 300#, 600#, 900#, 1500# and 2500# ANSI
Materials
  • Standard: 316L stainless steel
  • Optional: Titanium (FTPA/FIPA short buffers only), available to meet EN10243.1.B and/or NACE requirements
Pressure To maximum allowable flange operating pressure at temperature or 3480 psi (240 bar)
FTPA/FIPA Short Buffers
  • Fluid temperature: –310°F to 600°F (–190°C to 315°C)
  • Minimum pressure (gas service): typically 100 psi (6.9 bar), depending on fluid density
FTPA/FIPA Extended Buffers
  • Fluid temperature: –Liquids: –310°F to 1,112°F (–190°C to 600°C) –Gases and steam: –310°F to 842°F (–190°C to 450°C)
  • Minimum pressure (gas service): typically 100 psi (6.9 bar), depending on fluid density
Low-density, low-pressure gases use FIPA buffer assembly. No minimum pressure is required for liquid service. Consult GE for individual application specifications.

Threaded Buffer Assemblies

Service Liquids
Mounting 1 in NPT
Materials
  • Standard: 316L stainless steel
  • Optional: Titanium
FSPA Short Buffers Fluid temperature: –40°F to 212°F (–40°C to 100°C)
FSPA Extended Buffers Fluid temperature: –40°F to 600°F (–40°C to 315°C)

Socket-Weld Buffer Assemblies

Area Classifications
  • Explosion-proof: Class I, Division 1, Groups C&D
  • Flameproof: II 2 G EEx d IIC T6 KEMA 01ATEX2045
European Compliance Complies with EMC Directive 89/336/EEC, 73/23/EEC LVD (Installation Category II, Pollution Degree 2), and PED 97/23/EC for DN<25
Pipe Sizes 2 in to 30 in (50 mm to 760 mm), larger sizes upon request
Velocity Ranges
  • Gas service: 0.1 to 150 ft/s (0.03 to 46 m/s)
  • Liquid service: 0.1 to 40 ft/s (0.03 to 12 m/s) The maximum flow velocity specification for gases is variable, depending on gas sound speed, ultrasonic path length and gas density (pressure and molecular weight).
Service Liquids
Mounting 1 in socket weld
Material Standard: 316L stainless steel
FWPA Short Buffers Fluid temperature: –40°F to 212°F (–40°C to 100°C)

Descriptions Chinese English Français Deutsch Italiano Português Español
BWT System Options & Specifications BWT System Options & Specifications BWT System Options & Specifications BWT System Options & Specifications
BWT System Options & Specifications (88KB PDF) BWT System Options & Specifications (88KB PDF)
BWT Ultrasonic Flow Transducer Operating Manual BWT Ultrasonic Flow Transducer Operating Manual
BWT™ Sistema Bundle Waveguide Technology™ da Panametrics BWT™ Sistema Bundle Waveguide Technology™ da Panametrics
BWT™ Sistema Bundle Waveguide Technology™ Panametrics BWT™ Sistema Bundle Waveguide Technology™ Panametrics
BWT™ Système Panametrics Bundle Waveguide Technology™ BWT™ Système Panametrics Bundle Waveguide Technology™


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