EN ISO 3822-4:1997

Overview

EN ISO 3822-4:1997 (adopted as CEN standard) is part of the EN ISO 3822 series on acoustics for water-supply components. This Part 4 defines the mounting and operating conditions to be used in laboratory tests when measuring noise emission from in-line valves and special appliances caused by water flow. The document establishes consistent test setups so noise data are comparable between laboratories and manufacturers. It replaces the first edition.

Key topics and requirements

The standard focuses on practical, repeatable conditions rather than product performance limits. Main technical topics typically covered include:

• Mounting conditions: specified arrangements for connecting the test item to a test rig or pipeline to ensure representative mechanical support and minimize test-to-test variation.
• Operating conditions: defined hydraulic conditions (flow and pressure regimes) and modes of operation relevant to in-line valves and special appliances when measuring flow-induced noise.
• Test configuration: guidance on orientation, pipework layout, and retention of flow conditioners or straight runs needed for reproducible results.
• Measurement environment considerations: requirements to control background noise and resonances in the laboratory so the appliance noise can be isolated.
• Instrumentation placement and repeatability: recommended locations and practices for microphones and sensors to ensure comparable noise emission results across tests.
• Documentation: prescription for recording test conditions, mounting details and operating points so results are traceable and comparable.

(Note: the standard defines these types of conditions and arrangements; for precise procedures and numerical values refer to the full EN ISO 3822-4 text.)

Applications and users

This standard is useful for anyone involved in acoustic testing or specification of water supply components:

• Manufacturers of valves, flow controllers and special in-line appliances seeking standardized noise emission data for product development and catalogues.
• Independent test laboratories performing repeatable laboratory noise measurements for compliance, certification or comparison.
• Acoustic and hydraulic engineers assessing installation noise impacts in buildings and infrastructure.
• Specifiers and procurement teams requiring consistent test data to compare products on noise performance.
• Regulators and certification bodies using standardized methods for verification.

Using EN ISO 3822-4 helps produce reproducible, comparable noise emission data that support quieter water-distribution systems and informed product selection.

Related standards

• Other parts of the EN ISO 3822 series (laboratory test methods for water-supply appliances).
• General acoustics testing standards and CEN/ISO documents on noise measurement and instrumentation.

Keywords: acoustics, noise emission, water supply installations, in-line valves, laboratory tests, mounting and operating conditions, EN ISO 3822-4, CEN.