ASTM D3923-08(2014)
Standard Practices for Detecting Leaks in Reverse Osmosis and Nanofiltration Devices

Standard No.

ASTM D3923-08(2014)

Release Date

2008

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D3923-23

Latest

ASTM D3923-23

Scope

5.1 These practices may be used to determine whether a RO or NF device is free of leaks if the mechanical integrity of the device is to be confirmed. They may also be used to detect leaks in RO or NF devices whose operating performance indicates a possible leak. These practices may be used for either new or used devices.

1.1 These practices cover detecting leaks in which there is a direct communication between the feed or concentrate, or both, and the permeate. Several types of leaks are possible with the various configurations of reverse-osmosis (RO) and nanofiltration (NF) devices.

1.2 Types of Leaks:

1.2.1 With hollow-fiber devices, feed or concentrate leakage, or both, into the permeate stream by leaks through the tube sheet and past the tube sheet O-ring are possible. “Leaks” caused by broken fibers are not covered by these practices.

1.2.2 With spiral-wound devices, leaks may occur through damage of the membrane surface itself by punctures or scratches, by glue-line failure, and by O-ring leaks on product tube interconnectors.

1.2.3 With tubular devices, leaks due to membrane damage, tube end seal leaks, and leaks from broken tubes or product headers are possible.

1.3 Three leak test practices are given as follows:

	Sections
Practice A—Tube Sheet and O-Ring Leak Test for Hollow 8199;Fiber Devices	8 to 9
Practice B—Vacuum Test for Spiral Wound Devices	10 to 12
Practice C—Dye Test for Spiral Wound and Tubular Devices	13 to 18

1.4 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.

ASTM D3923-08(2014) Referenced Document

• ASTM D1129 Standard Terminology Relating to Water
• ASTM D1193 Standard Specification for Reagent Water
• ASTM D4194 Standard Test Methods for Operating Characteristics of Reverse Osmosis Devices
• ASTM D6161 Standard Terminology Used for Crossflow Microfiltration, Ultrafiltration, Nanofiltration, and Reverse Osmosis Membrane Processes
• ASTM D6908 Standard Practice for Integrity Testing of Water Filtration Membrane Systems
• ASTM E275 Standard Practice for Describing and Measuring Performance of Ultraviolet, Visible, and Near-Infrared Spectrophotometers
• ASTM E60 Standard Practice for Analysis of Metals, Ores, and Related Materials by Molecular Absorption Spectrometry

ASTM D3923-08(2014) history

• 2023 ASTM D3923-23 Standard Practices for Detecting Leaks in Reverse Osmosis and Nanofiltration Devices
• 2008 ASTM D3923-08(2014) Standard Practices for Detecting Leaks in Reverse Osmosis and Nanofiltration Devices
• 2008 ASTM D3923-08 Standard Practices for Detecting Leaks in Reverse Osmosis and Nanofiltration Devices
• 1994 ASTM D3923-94(2003)e1 Standard Practices for Detecting Leaks in Reverse Osmosis Devices
• 1998 ASTM D3923-94(1998) Standard Practices for Detecting Leaks in Reverse Osmosis Devices