BS 8520-2:2009 Equipment used in the controlled removal of asbestos-containing materials. Negative pressure units. Specification
BS 8520-2 provides negative pressure unit (NPU) manufacturers with a minimum specification for the manufacture of NPUs.
Although the manufacture of NPUs has previously met the expectations of the asbestos removal industry, no specifications or specific guidance existed. It was therefore felt that there was a need to provide the asbestos removal industry with a minimum specification to raise industry standards, with particular attention to health and safety issues.
BS 8520-2 specifies requirements for portable and/or transportable negative pressure units (NPUs) incorporating HEPA filters covered by BS EN 1822 for use in the controlled removal of asbestos-containing materials (ACMs).
BS 8520-2 applies to NPUs designed to create negative pressure within a portable decontamination unit facility or working enclosure and two-part NPUs.
BS 8520-2 does not apply to local exhaust ventilation.
BS 8520-2 is based on PAS 60-2:2004, which is now withdrawn.
Contents of BS 8520-2:
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Design and construction
5 Control equipment
6 Instructions for installation, operation and maintenance
7 Technical literature
8 Labelling
9 Conformity marking
Annexes
Annex A (normative) Airflow performance test
Annex B (informative) Airflow performance test report
Bibliography
List of figures
Figure 1 – Example negative pressure unit
Figure A.1 – Airflow performance test
Figure B.1 – Example of an airflow performance test report
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