Available Tests

Available material flow properties tests

We can provide all your bulk material flow properties testing needs, including those requiring special handling, such as hazardous or moisture-sensitive materials.

Standard test

Astandard test report includes all of the following properties measured at room-temperature and ambient humidity conditions, as well as plots of cohesive strength, surface friction angles, density as a function of consolidation pressure and permeability at the hopper outlet:

  • Critical conical hopper outlet dimension to prevent arching, both instantaneously and after a specified consolidation time period ranging from a few minutes to several days.
  • Critical flow channel diameter to prevent ratholing, both instantaneously and after a specified consolidation time period ranging from a few minutes to several days.
  • Minimum conical hopper slope to insure flow at the walls and thereby eliminate ratholing on 304-2B, 304-1stainless steel and any of two dozen other preferred wall materials.
  • The expected density in the feeder.
  • The expected density in the bin.
  • The recommended chute angles to prevent buildup at impact points.
  • The percent elastic springback after consolidation to pressures in the bin.

Temperature and humidity test

We can test materials at constant or variable temperatures and humidity conditions to simulate typical plant conditions, seasonal outside storage or pneumatic conveying. Typical tests include all the data included in our standard test and any special handling recommendations imposed by temperature and humidity factors. We can run tests from sub-freezing to 2,000 degrees Fahrenheit and humidity conditions from zero to saturation.

Segregation test

Segregation can be caused by sifting, angle of repose, fluidization, air currents, entrainment of fines, surface friction, impact on a fluidized layer of material or multiple combinations of these mechanisms. Each produces different segregation patterns. For example, air currents may carry fine product and deposit it near the silo wall. Coarse material may impact on fluidized material and produce layered segregation. We can measure a material’s tendency to segregate due to any or all these mechanisms.

Degradation test

Some materials are more affected by plant conditions than most and will significantly degrade through each processing step. We can measure a material’s degradation.

Other tests

In addition to the basic tests described above, we provide the following: instantaneous strength test; high pressure strength test; compaction screw test; friction test; density test; special handling (glove box) test; submerged materials test; worst and best case determination test; and scale model tests.