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PRECISION PETROLEUM TESTING INSTRUMENTS

Foam

D892 Foam Test — Ceramic or Metal Diffuser?

Although the method allows both a circular, Norton ceramic (stone) diffuser and a Mott cylindrical metal diffuser, there are advantages and disadvantages to each. The stone diffuser was used for many years before the introduction of the metal diffuser. Both need to meet certification requirements but the metal diffuser is much more uniform, easier to […]

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Certification of the Diffuser for ASTM D892 and D6082 Foam Testing

The diffusers used in foam testing must meet a certain permeability and pore diameter. The diffusers, especially the ceramic stones, change over time and fall out of specification, sometimes very quickly. They should be verified at least every week or every ten tests. The frequency necessary can only be determined by individual laboratory based on […]

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