ISO 2151:2004 PDF

Scope: This International Standard specifies methods for the measurement, determination and declaration of the noise emission from portable and stationary compressors and vacuum pumps. It prescribes the mounting, loading and working conditions under which measurements are to be made, and includes measurement or determination of the noise emission expressed as — the sound power level under specified load conditions, — the emission sound pressure level at the work station under specified load conditions. It is applicable to — compressors for various types of gases, — oil-lubricated air compressors, — oil-flooded air compressors, — water injected air compressors, — oil-free air compressors, — compressors for handling hazardous gases (gas compressors), — compressors for handling oxygen, — compressors for handling acetylene, — high-pressure compressors [over 4 Mpa (40 bar)], — compressors for application at low inlet temperatures, i.e. below 0 ℃, — large compressors (over 1 000 kW input power), — portable and skid-mounted air compressors, and — rotary positive displacement blowers and centrifugal blowers and exhausters in applications ≤ 0,2 MPa (≤ 2 bar). It is not applicable to — compressors for gases other than acetylene having a maximum allowable working pressure of less than 0,5 bar/0,05 MPa, — refrigerant compressors used in refrigerating systems or heat pumps, — hand-held portable compressors.

ISO 2151:2004 Referenced Document

IEC 61672-1:2002 Electroacoustics - Sound level meters - Part 1: Specifications
ISO 9614-1:1993 Acoustics; determination of sound power levels of noise sources using sound intensity; part 1: measurement at discrete points

2004 ISO 2151:2004 Acoustics - Noise test code for compressors and vacuum pumps - Engineering method (Grade 2)
1972 ISO 2151:1972 Measurement of airborne noise emitted by compressor/primemover-units intended for outdoor use (To be replaced by future ISO 3989 of TC 43)