 |
| Purchase Information |
| Use this form to request purchase information on IEC online subscriptions. |
|
|
Document IEC 60534-8-3 is offered by IHS as part of an online subscription. This subscription contains many documents on the same topic.
You may also purchase this document alone from the IHS Standards Store.
IEC 60534-8-3 Document Information:
Title
Industrial-Process Control Valves - Part 8-3: Noise Considerations - Control Valve Aerodynamic Noise Prediction Method
Vannes De Regulation Des Processus Industriels - Partie 8-3 Considerations Sur Le Bruit - Methode De Prediction Du Bruit Aerodynamique Des Vannes De Regulation
International Electrotechnical Commission
Publication Date:
Jul 1, 2000
Scope:
Scope and limitations
This part of IEC 60534 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.
This standard addresses only the noise generated by aerodynamic processes in valves and in the connected piping. It does not consider any noise generated by reflections, mechanical vibrations, unstable flow patterns and other unpredictable behaviour.
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.
This method is valid only for steel and steel alloy pipes (see equations (38) and (40) in 5.6).
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.
For limitations on special low noise trims not covered by this standard, see 6.5. When the Mach number in the valve outlet exceeds 0,3 for standard trim or 0,2 for low noise trim, the procedure in clause 7 is used.
The Mach number limits in this standard are as follows:
About IHS
IHS (NYSE: IHS) is a leading global provider of critical technical information, decision-support tools and related services in a number of industries including aerospace and defense, automotive, construction, electronics, and energy. IHS serves customers ranging from large governments and multinational corporations to smaller companies and technical professionals in more than 100 countries. IHS been in business for more than 45 years and employ more than 2,300 people around the world.
