The BS 5857-1 standard, a European standard, includes a test method for measuring water flow within the scope of measuring liquid flow in closed channels using radioactive or non-radioactive tracers.
The principle of the measurement method here is based on the required audience conditions, the selection of the measuring length of the pipe, the measurement procedure, the estimation of the uncertainties in the flow measurement and the flow calculation.
For example, in the textile sector, BS 5857-1 standard is applied in the flammability tests of composites furnished for furniture seats with cigarette materials.
The transit time method (measuring water flow) is a flow measurement method based on tracer techniques. The measurement is made by injecting a follower pulse into the stream and measuring the transition time between two sensing locations. The volume flow rate is calculated using the average flow rate from the transit time and the pipe cross-sectional area. When a radioisotope tracer is used, measurement can be made from outside the tube and without disturbing the process.
The use of the transit time method has been limited by the use of radioactive tracers, difficulties with their availability, and lack of suitable equipment in industrial settings.
The main physical quantities that must be known when measuring flow in closed channels are, for example, mass flow of water, volumetric flow and velocity. Speed is simply the distance traveled per unit time. Volumetric flow, for example, is the amount of volume passing through the cross-sectional area of a pipe per unit time, while mass flow is the amount of water flowing through the pipe per unit time. The mass flow rate is obtained by multiplying the volumetric flow rate with the density. The total energy of the fluid is equal to the sum of its kinetic energy, potential energy, pressure energy and internal energy.
Determining the flow rate of water passing through pipes used in fire extinguishing systems is an important effort in firefighting. Constrictions in the pipe and factors that reduce the flow rate over time are easily detected with this method.
Among the numerous test, measurement, analysis and evaluation studies it provides for businesses in various sectors, our organization includes test services for measuring water flow in closed channels using radioactive or non-radioactive tracers within the scope of BS 5857-1 standard, with its trained and expert staff and advanced technological equipment. gives.
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