BS ISO 21018-3:2008

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Health and safety
   4.1 General
   4.2 Electrical power
   4.3 Mechanical fluid power
   4.4 Process liquids
5 Principle of filter blockage technique
6 Equipment
   6.1 General
   6.2 Equipment for on-line and off-line calibration
       and verification
7 Operating procedures
   7.1 General
   7.2 Operating from a pressurized line
   7.3 Procedure for operating from a system reservoir
   7.4 Operating from a bulk container
   7.5 Operating from a sample bottle
8 Calibration and verification procedure
   8.1 General principles
   8.2 Equipment required
   8.3 Preliminary procedures
   8.4 Preparation of dust sample
   8.5 On-line calibration/verification procedure
   8.6 Verification of correct operation
9 Calibration and/or verification
10 Test report
11 Identification statement
Annex A (informative) - Examples of use and applicability
        of the filter blockage technique

Describes a method for the semi-quantitative determination of the particulate contamination level using the filter blockage technique (also known as the mesh-obscuration method or the pore-blockage technique) either on-line or off-line in containers.

This part of ISO 21018 specifies a method for the semi-quantitative determination of the particulate contamination level using the filter blockage technique (also known as the mesh-obscuration method or the pore-blockage technique) either on-line or off-line in containers. It also defines procedures for calibrating the instruments and verifying their correct operation both in the laboratory and in service. In general, the techniques described in this part of ISO 21018 are suitable for monitoring the general cleanliness level in hydraulic systems, the progress in flushing operations, support equipment and test rigs. The use of this method is applicable to all single- or multi-phase liquid systems.