GB/T 31909-2015Permeable sintered metal materials - Determination of the air permeability (English PDF)

1 Scope

This standard specifies the method for measuring the permeability of sintered metal material air permeability.

This standard applies to tubular or plate-like permeable sintered metal materials - Determination of air permeability.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein

Member. For undated references, the latest edition (including any amendments) applies to this document.

GB/T 5163 Sintered metal materials (excluding carbide) permeable sintered metal material density, oil content and open porosity

Determine

Principle 3

Air permeability is permeable sintered metal material (porous material) gas through one kind of way of characterizing the performance, also called the relative permeability coefficient (Kg), which is calculated see equation (1).

Kg =

A × deltaP (1)

Where.

Kg --- air permeability in units of cubic meters per hour kPa [m3/(h · kPa · m2)];

Q --- gas flow rate, in units of cubic meters per hour (m3/h);

A --- test specimen area, in square meters (m2);

Pressure deltaP --- gases produced by the difference in the sample, in units of kilopascals (kPa).

From the air permeability of the formula (1) can be seen in its characterization it is. pressure at the unit, the gas flow through unit area of specimen.

4 Sample

Before air permeability test, the sample should be removed pores all of the liquid in which oil should be GB/T 5163, the use of appropriate

The solvent was removed before the test sample after drying.

5 Instruments