Litre Meter has shipped 11 low-flow flowmeters to Single Buoy Moorings (SBM) for use in chemical injection on a floating production, storage and offloading (FPSO) vessel offshore Brazil. The ship is contracted to Petrobras for use on the Baleia Azul field located off the coast of Brazil in the Campos Basin.
The customised LF05 VFF meters were designed to measure the flow of scale inhibitor. Each meter is calibrated for low flow at 20l/h with a viscosity of 27 centipoise. Each meter is pressure rated to 414 bar and fitted with 1/2-inch US standard national pipe thread taper (NPT) threaded connections.
The meters are constructed of 316 stainless steel with titanium rotors. The low flow capability of the meters has been improved by coating the pressure balance chambers and titanium rotors with physical vapour deposition (PVD) designed to lower the friction properties of the meters to extend their ability to measure low flows. The additional hardness provided by the PVD coating also improves wear resistance.
All the LF05 meters were supplied with separate, panel-mounted displays showing flow rate and total with HART or Fieldbus protocols on a three-wire system mounted in an ATEX Exd stainless steel housing. Corrosion and the loss of metal can occur anywhere in the production system from the bottom hole to surface lines and equipment. Chemicals are injected into the system to prevent these problems – and the Litre Meter LF05 flowmeters are used to precisely measure the amount of chemical being added.