ASME PTC 36:2018 pdf free download

ASME PTC 36:2018 pdf free download.Measurement of Industrial Noise.
3-1 CHOICE OF METHODS
Procedures described in ANSI/ASA S1.13 and ANSI/ASA S12.18 shall be used to measure airborne sound-pressure levels in a near field or far field under any conditions, ANSI/ASA S 1.13 is primarily for indoor sound measurements. although it can be used outdoors, and ANSI/ASA Si 2.1 B applies only to outdoor environments. If the sound-power level of outdoor sources must be characterized, the methods of other recognized standards may be used
3-2 CONFIGURATIONS
(a) Components to Be Tested. Equipment being tested consist of a single component or an entire set ofcomponents that include all or part of an industrial facility. The equipment may be located indoors or outdoors and may include the enclosure building(s) as a source of noise. This Code utilizes, by reference, existing standards and provides additional informational guidance in the application of those methodologies (see Nonmandatory Appendix U).
(b) Equipment Configuration. A wide range of potential equipment conligurations are allowed for indoor and outdoor noise sources. For those situations in which the receiver sound levels of indoor equipment is the objective, corrections shall be made for the reverberation effects of building surfaces (wall, floor, or ceiling).
3-3 TEST UNCERTAINTY
Tables 3.3.1 and 3.3.2 provide approximate limits for test data correction and the estimated amount of corresponding uncertainty for various grades of measurement accuracy. Table 3.3.1 defines the grade ofaccuracy available to the userof ASME PTC 36 based on the magnitude of the corrections, For example, a test for which the background noise correction exceeds 1.3 dEl or the environmental correction exceeds 2 dEl cannot be considered an engineering grade test. Therefore. the uncertainty ofthe test data degrades to survey grade (or special case), which results In a greater degree of uncertainty. Table 3-3-2 shows the estimated uncertainty associated with engineering grade and survey grade test results, expressed as the 95% confidence interval or 2 times the standard deviation. Both tables come from ISO 10494. Table 3-3-2 is slightly modified. If test result corrections exceed the allowable range for engineering grade or survey grade accuracy, the uncertainty will be greater than that shown in Table 3-3-2 and will require evaluation on a case-by-case basis.
In the absence of contractually negotiated test uncertainty. Table 3-3-2 can be used If the test methodology has used one of the referenced standards in this Code, the uncertainty given in the referenced standard, if any, shall be stated. Nonmandatory Appendix B may be appropriate if the user of this Code is in a situation where he/she LS required to test under conditions outside the allowable parameters in the referenced standards.
3-4 AGREEMENTS PRIOR TO TEST
The parties to a test conducted under this Code should reach agreement on the Items listed In paras. 3.4.1 through 3.4.S pnor to the test. In many cases, the parties may need to agree on only one of the referenced standards.