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ASTM E1222-90(2016)

Historical Reaffirmation

Standard Test Method for Laboratory Measurement of the Insertion Loss of Pipe Lagging Systems

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1.1 This test method covers the measurement of the insertion loss of pipe lagging systems under laboratory conditions.

1.2 A procedure for accrediting a laboratory for purposes of this test method is given in Annex A1.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


5.1 The insertion loss of a pipe lagging system depends upon the lagging system materials, the method used to apply the materials, the pipe wall thickness, the size and shape of the bare and lagged pipe, and the mechanisms causing noise radiation from the pipe. Insertion losses measured using this test method should be used with some caution. In the laboratory, measurements must be made under reproducible conditions, but in practical usage in the field, the conditions that determine the effective insertion loss are difficult to predict and they may lead to slightly different results. Insertion losses measured with this test method can be used successfully for acoustical design purposes. Insertion losses measured with this test method are most useful for pipes and lagging systems which are similar to those used in the laboratory configuration.

5.2 This test method may be used to rank-order pipe lagging systems according to insertion loss or to estimate the field insertion loss of pipe lagging systems installed in the field.

5.3 This test method assumes that pipe wall stresses resulting from different methods of supporting the test pipe in the laboratory do not have a significant effect upon the measured insertion loss.

5.4 Pipe lagging systems typically have small insertion loss, and sometimes negative insertion loss, at frequencies below 500 Hz. The results obtained at frequencies below 500 Hz may be somewhat erratic. Sound sources used with this test method normally have a low frequency limit in the range from 300 to 500 Hz. For these reasons, the lowest band of frequencies for which results are required is centered at 500 Hz.

SDO ASTM: ASTM International
Document Number E1222
Publication Date Oct. 1, 2016
Language en - English
Page Count 5
Revision Level 90(2016)
Supercedes
Committee E33.08
Publish Date Document Id Type View
Nov. 1, 2022 E1222-22 Revision
June 29, 1990 E1222-90R02 Revision
Oct. 1, 2016 E1222-90R16 Reaffirmation
April 1, 2009 E1222-90R09 Reaffirmation
June 29, 1990 E1222-90R96E01 Reaffirmation