IEC 60534-8-3:2010

Industrial-process control valves - Part 8-3: Noise considerations - Control valve aerodynamic noise prediction method

IEC 60534-8-3:2010 establishes a theoretical method to predict the external sound-pressure level generated in a control valve and within adjacent pipe expanders by the flow of compressible fluids. This method considers only single-phase dry gases and vapours and is based on the perfect gas laws. It is assumed that the downstream piping is straight for a length of at least 2 m from the point where the noise measurement is made. The method is applicable to the following single-stage valves:
- globe (straight pattern and angle pattern),
- butterfly,
- rotary plug (eccentric, spherical),
- ball, and
- valves with cage trims.
Specifically excluded are the full bore ball valves where the product FpC exceeds 50 % of the rated flow coefficient. This third edition cancels and replaces the second edition published in 2000. This edition constitutes a technical revision. The significant technical changes with respect to the previous edition are as follows:
- predicting noise as a function of frequency;
- using laboratory data to determine the acoustical efficiency factor.

Vannes de régulation des processus industriels - Partie 8-3: Considérations sur le bruit - Méthode de prédiction du bruit aérodynamique des vannes de régulation

La CEI 60534-8-3:2010 établit une méthode théorique pour prévoir le niveau de pression acoustique externe engendré dans une vanne de régulation et dans les raccords adjacents par le débit d'un fluide compressible. Cette méthode ne considère que les régimes monophasiques de gaz et vapeurs secs, et est basée sur la loi des gaz parfaits. On suppose que la tuyauterie aval comprend une longueur droite d'au moins 2 m à partir du point de mesure du bruit. La méthode est applicable aux vannes mono-étagées suivantes:
- à soupape (droites et d'équerre),
- à papillon,
- à obturateur rotatif (excentré, sphérique),
- à tournant sphérique, et
- aux vannes à cage.
Les vannes à tournant sphérique à passage direct, pour lesquelles le produit FpC dépasse 50 % du coefficient de débit assigné, sont spécifiquement exclues. Cette troisième édition annule et remplace la deuxième édition parue en 2000. Cette édition constitue une révision technique. Par rapport à l'édition précédente, les modifications techniques majeures sont les suivantes:
- la prédiction du bruit en fonction de la fréquence;
- l'utilisation des données de laboratoire pour déterminer le coefficient de rendement acoustique.

General Information

• Status: Published
• Publication Date: 28-Nov-2010
• ICS: 17.140.20 - Noise emitted by machines and equipment
• ICS: 23.060.40 - Pressure regulators
• ICS: 25.040.40 - Industrial process measurement and control
• Technical Committee: SC 65B - Measurement and control devices
• Drafting Committee: WG 9 - TC 65/SC 65B/WG 9
• Current Stage: PPUB - Publication issued
• Start Date: 15-Dec-2010
• Completion Date: 29-Nov-2010

Relations

• Revises: IEC 60534-8-3:2000 - Industrial-process control valves - Part 8-3: Noise considerations - Control valve aerodynamic noise prediction method
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60534-8-3 ®
Edition 3.0 2010-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial-process control valves –
Part 8-3: Noise considerations – Control valve aerodynamic noise prediction
method
Vannes de régulation des processus industriels –
Partie 8-3: Considérations sur le bruit – Méthode de prédiction du bruit
aérodynamique des vannes de régulation

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IEC 60534-8-3 ®
Edition 3.0 2010-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial-process control valves –
Part 8-3: Noise considerations – Control valve aerodynamic noise prediction
method
Vannes de régulation des processus industriels –
Partie 8-3: Considérations sur le bruit – Méthode de prédiction du bruit
aérodynamique des vannes de régulation

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
X
CODE PRIX
ICS 17.140.20; 23.060.40; 25.040.40 ISBN 978-2-88912-241-7
– 2 – 60534-8-3 ã IEC:2010
CONTENTS
FOREW ORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normativ e references . 7
3 Terms and definitions . 8
4 Symbols . 9
5 Valves with standard trim . 12
5.1 Pressures and pressure ratios. 12
5.2 Regime definition . 13
5.3 Preliminary calculations . 14
5.3.1 Valve style modifier F . 14
d
5.3.2 Jet diameter D . 14
j
5.3.3 Inlet fluid density r
............................................................................ 14
5.4 Internal noise calculations . 15
5.4.1 Calculations common to all regimes . 15
5.4.2 Regime dependent calculations . 16
5.4.3 Downstream calculations . 18
5.4.4 Valve internal sound pressure calculation at pipe wall . 19
5.5 Pipe transmission loss calculation. 20
5.6 External sound pressure calculation . 21
5.7 Calculation flow chart . 22
6 Valves with special trim design . 22
6.1 General . 22
6.2 Single stage, multiple flow passage trim . 22
6.3 Single flow path, multistage pressure reduction trim (two or more throttling
steps) . 23
6.4 Multipath, multistage trim (two or more passages and two or more stages) . 25
7 Valves with higher outlet Mach numbers . 27
7.1 General . 27
7.2 Calculation procedure . 27
8 Valves with experimentally determined acoustical efficiency factors . 28
9 Combination of noise produced by a control valve with downstream installed two
or more fixed area stages . 29
Annex A (informative) Calculation examples . 31
Bibliography . 46

Figure 1 – Single stage, multiple flow passage trim . 23
Figure 2 – Single flow path, multistage pressure reduction trim . 24
Figure 3 – Multipath, multistage trim (two or more passages and two or more stages) . 26
Figure 4 – Control valve with downstream installed two fixed area stages . 30

Table 1 – Numerical constants N . 15
Table 2 – Typical values of valve style modifier F (full size trim) . 15

d
Table 3 – Overview of regime dependent equations . 17

60534-8-3 ã IEC:2010 – 3 –
Table 4 – Typical values of A and St . 18
h p
Table 5 – Indexed frequency bands . 19
Table 6 – Frequency factors G (f) and G (f) . 21
x y
Table 7 – “A” weighting factor at frequency f . 22
i
– 4 – 60534-8-3 ã IEC:2010
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL-PROCESS CONTROL VALVES –

Part 8-3: Noise considerations –
Control valve aerodynamic noise prediction method

FOREWORD
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International Standard IEC 60534-8-3 has been prepared by subcommittee 65B:
Measurements and control devices, of IEC technical committee 65: Industrial-process
measurement, control and automation.
This third edition cancels and replaces the second edition published in 2000. This edition
constitutes a technical revision.
The significant technical changes with respect to the previous edition are as follows:
· predicting noise as a function of frequency;
· using laboratory data to determin
...